Мы поможем в написании ваших работ!



ЗНАЕТЕ ЛИ ВЫ?

Последовательность выполнения задания

Поиск

Последовательность выполнения задания

1. Получить задание согласно варианту, провести анализ исходных данных.

2. Ознакомиться с целью и темой работы. Записать номер и тему работы на стандартный лист отчёта.

3. Ознакомиться с нормативными и справочными материалами выданными преподавателем

4. Ответить на вопросы для самопроверки

5. Выполненную работу отправьте преподавателю по email:sattbondarenkomaxim@gmail.com в виде фото.

Готовую работу отправить по электронному адресу до 19.05.2020.

Не забудьте указать свои Фамилию Имя и группу!

 Задание.

1. Повторите теоретический материал

2. Прочтите задание для дальнейшего его выполнения

3. Подготовите рабочую область.

4. Выполните работу на А4 листе

5. Выполните условия приведенного ниже задании

6. Выберите вариант согласно № по списку

7. Перепишите исходные данные индивидуального задания

8. Выполните все условия и расчеты  на А4 листе указанные в задании:

9.  Напишите вывод по выполненной работе.

Задание № 1

Вариант

Индивидуальный Задание

Описать работу и устройство башенных кранов.

Вычертить схему башенного крана.

Вычертить схему запасовки канатов

Описать устройство автомобильного крана.

Вычертить схему башенных кранов.

Вычертить схему козлового крана.

Описать устройство козлового крана.

Описать устройство гусеничного крана.

Вычертить общий вид гусеничного крана.

Вычертить схему поворотного механизма с цепочным колесом. Сравните со вторым типом поворотного механизма. 

Вычертить схему поворотного механизма с канатным приводом Сравните с первым типом поворотного механизма. 

Вычертить схема стреле запасовки грузового каната

Вычертить кинематическую схему лебедочного механизма изменения вылета стрелы

Описать работу и устройство козлового крана.

Описать работу и устройство крана на специальных шасси автомобильного типа

Вычертить схему крана на специальных шасси автомобильного типа

Определить годовой производительности фонд времени:

Тг = n*1* m *{365-(Т1+Т2+Т3+Т4)}

где (1-2)n*1 — среднее число смен работы в сутки;

m (1-8) — продолжительность смены;

Т1(1-16)— количество дней, затраченных на проведение ремонтов;

Т2(1-16)— количество выходных и праздничных дней:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             

Т3(1-16)— суммарное время перебазирования;      

Т4 (1-16)— время простоев по метеоусловиям.

Значения п1 и Т3 принимается по фактическим данным строительной организации. Т2— на осно­вании рекомендаций по организации технического обслуживания и ремонта строительных машин; Т4 — фактическим для данным района строительства.

 

Задание № 2

Теоретическая производительность (м3/ч) экскаватора в разрыхленной массе определяется по формуле

nк=

где Тц.т – теоретическая продолжительность рабочего цикла, с.

Подставив в формулу (1) значение nк, получим формулу для определения производительности одноковшового экскаватора

nк=

Часовая техническая производительность в плотной массе (м ) для многоковшовых экскаваторов определяется по формуле

Пэ.тех=60*E*nкэз

где kэ - коэффициент экскавации;

kн.к - коэффициент наполнения ковша;

kр.к - коэффициент разрыхления породы в ковше;

k3 - коэффициент забоя, учитывающий влияние вспомогательных операций;

kэ=

tр - продолжительность непрерывной работы экскаватора с одного положения или при одном направлении движения ротора, с;
tB - продолжительность одной передвижки или перемены направления движения ротора, с.

Часовая техническая производительность в плотной массе (м ) для одноковшовых экскаваторов определяется по формуле

 

Пэ.тех=

где ТЦ.Р - расчетная продолжительность рабочего цикла экскаватора в данном забое, зависящая от типа разрабатываемых пород и угла поворота экскаватора к разгрузке, с.

Значения коэффициентов kн.к, kр.к , kэ определяются в зависимости от свойств экскавируемых пород, вместимости и формы ковша, квалификации машиниста и др. Для неразрыхленных пород значения этих коэффициентов зависят в основном от типа породы. При разработке разрыхленных полускальных и скальных пород значения kн.к, kр.к , kэ зависят в основном от кусковатости пород в развале и размеров ковша.

Для ориентировочных расчетов при средней степени дробления породы взрывом они могут быть приняты по табл. 1.

Таблица 1

Породы

кр.к

Кн.к.

кэ

Песок, супесь, легкая глина

1,1-1,18

1-1,1

0,95

Бурый и каменный уголь, плотные глины, слабые глинистые сланцы, мел

1,15-11,3

0,95-1,1

0,8

Плотные глинистые сланцы, мергель, слабые песчаники на глинистом цементе

1,25-1,35

0,85-1

0,75

Песчаники на известковом цементе, слабые известняки

1,3-1,45

0,80-1

0,65

Песчаники на железистом и кварцевом цементе, крепкие известняки и доломиты

1,45-1,5

0,75-0,9

0,55

Расчетная продолжительность (с) рабочего цикла одноковшовых экскаваторов при совмещении вспомогательных операций (опускание ковша для черпания и разгрузки, подтягивание и выдвижение рукояти и др.) с основными операциями определяется по формуле

где tч - продолжительность черпания, с;

tр - продолжительность разгрузки ковша, с;

tп.р, tп.з - продолжительность поворота экскаватора соответственно к месту разгрузки и к забою, с.

Значения tч, tп.р, tр, tп.з зависят от свойств пород, параметров забоя и угла поворота экскаватора к разгрузке. Для ориентировочных расчетов продолжительность рабочего цикла в средних условиях разработки при угле поворота экскаватора 135° можно принимать по табл. 2. Значения k3изменяются в пределах 0,85-0,9.

Таблица  2



Поделиться:


Последнее изменение этой страницы: 2024-06-17; просмотров: 6; Нарушение авторского права страницы; Мы поможем в написании вашей работы!

infopedia.su Все материалы представленные на сайте исключительно с целью ознакомления читателями и не преследуют коммерческих целей или нарушение авторских прав. Обратная связь - 18.188.113.185 (0.01 с.)