设计描述：

文档包括:
word版设计说明书一份，共72页，约24000字

任务书一份

CAD版本图纸，共8张

目    录
1 绪论………………………………………………………………………………1
1.1我国采煤机30多年的发展进程………………………………………………1
1.1.1 20世纪70年代是我国综合机械化采煤起步阶段……………………… 1
1.1.2 20世纪80年代是我国采煤机发展的兴旺时期………………………… 1
1.1.3 20世纪90年代至今是我国电牵引采煤机发展的时代………………… 2
1.2  国际上电牵引采煤机的技术发展状况…………………………………… 4
1.3　国内电牵引采煤机的发展状况…………………………………………… 5
2总体方案的确定………………………………………………………………  6
2.1MG300/700-WD型采煤机简介…………………………………………………6
2.1.1概述…………………………………………………………………………6
2.1.2主要技术参数………………………………………………………………7
2.1.3结构特点……………………………………………………………………7
2.2摇臂结构设计方案的确定……………………………………………………7
2.3截割部电动机的选择…………………………………………………………7
2.4传动方案的确定………………………………………………………………8
2.4.1传动比的确定………………………………………………………………8
2.4.2 传动比的分配…………………………………………………………… 9
3 传动系统的设计……………………………………………………………11
3.1各级传动转速、功率、转矩的确定…………………………………………11
3.2 齿轮设计及强度效核……………………………………………………… 13
3.3　轴的设计及强度效核………………………………………………………23
3.3.1 先确定Ⅲ轴……………………………………………………………… 23
3.3.2轴4的设计及强度效核……………………………………………………29
3.3.3惰一轴的设计…………………………………………………………… 35
4 行星传动机构的设计过程………………………………………………37
5 采煤机的使用与维护…………………………………………………………… 57
5.1采煤机使用过程中常见故障与处理……………………………………… 57
5.2 大功率采煤机截割部温升过高现象及解决方法………………………  58
5.3采煤机轴承的维护及漏油的防治………………………………………… 59
5.4煤矿机械传动齿轮失效的改进途径……………………………………… 61
5.5 硬齿面齿轮的疲劳失效及对策…………………………………………… 65
6 总结  …………………………………………………………………………68
7 参考文献………………………………………………………………………69
8 致谢……………………………………………………………………………70
 

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

 
ABSTRACT

Longwall equipment consists of three major components: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 made.since 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 is a 700 hps.Electric motor mainly is the power source for the shearer.It provides for the cutting drum.The 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 unit.The ranging-arm is a speed reduction unit.It consists of four stage drives.The 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