文档介绍：充值下载即送 CAD 图纸, QQ 36396305 答辩无忧,值得下载! 摘要长壁工作面采煤设备由三大件组成:液压支架,刮板运输机和采煤机。随着长壁采煤经验的增加,根据不同地质条件对采煤机做了一些改进,使长壁工作面采煤在将来的煤炭工业上起到更显著的作用。本论文设计的是电动机功率为 700hp 。电动机主要是为截割部割煤和牵引部提供动力,采煤机装有两个电动机,一台用于牵引部和一个截割部,另一个电动机则为另一个截割部和其他辅助设备提供动力。本文主要讲述了采煤机截割部的设计。采煤机截割部是实现采煤机减速的单元。截割部里采用了四级减速,动力由采煤机电动机通过齿轮传递到采煤机滚筒来实现割煤。对称的摇臂结构使采煤机实现左右摇臂可以互换。截割部采用增加惰轮的个数来增加摇臂的长度,从而实现增大采煤机的截深。关键词: 滚筒采煤机截割部摇臂长壁工作面采煤充值下载即送 CAD 图纸, QQ 36396305 答辩无忧,值得下载! ABSTRACT Longwall equipment consists of three ponents:the hydraulically powered roof support,the chain conveyor,and the coal-cutting machine. As a result of increased experience with longwall installations under different conditions,certain improvements are being longwall mining is obviously going to play a much larger role in the coal mining industry in the future. this text design is the electric motor power isa700 motor mainly is the power source for the provides for the cutting large capacity shearers are generally equipped with two electric motors: one for the haulage unit and one gearhead and the other for the other gearhead and other ancillary equipment. This paper is mainly about the design of the ranging-arm of the cut ranging-arm isa speed reduction consists of four stage power applied by the cutter motor through three spur gear transmissions and one epicyclic gearing drives the drum to cut coal. The external form of the ranging-arm is straight and symmetrical structure which enables the lest and right ranging-arms can replace each other. The gears referred in this parper are all profile-shifted gears in order to increase their strength. Keywords: Shearer cut unit Ranging-arm longwall mining 充值下载即送 CAD 图纸, QQ 36396305 答辩无忧,值得下载! 目录 1绪论..................................................................................................................... 1 我国采煤机 30多年的发展进程................................................................ 1 20世纪 70年代是我国综合机械化采煤起步阶段.................