机械5

摘要 900kw电牵引采煤机是一种大功率无链电牵引采煤机，该采煤机适用于缓倾斜的中硬煤层，它与刮板输送机液压支架等配套使用，该采煤机的机械传动采用直齿传动系统，在能够承受足够载荷的情况下，节约成本，降低维护的难度。 本次设计中主要是针对采煤机牵引部的设计，为满足设计要求是以MGTY400/900-3.3D型电牵引采煤机的牵引部为设计对象，采煤机的牵引部主要是由牵引机构和牵引部传动装置组成，其中传动装置中的减速箱是由两级直齿轮减速以及两级行星齿轮减速组成，其主要作用是将电动机输出的转速降低从而使扭矩增大，最后驱动行走部带动采煤机沿着工作面前进。设计任务主要有首先初步确定方案，确定了方案之后查阅各种资料对牵引部的传动系统进行设计，完成关键部件的设计计算，完成关键零件的设计计算，对减速箱的齿轮、轴、轴承、花键等零部件的选型和校核以及完成了摩擦制动器、行走箱、牵引部减速箱的设计等，在设计过程中应该正确的利用设计手册，实事求是的计算，确保计算中数字的准确性，培养我们独立思考认真解决问题的能力，以此来达到此次设计的目的。 关键词：采煤机：牵引部：减速箱：齿轮：行星轮 Abstract MG400/900-WD shearer is a ki
nd of high-power chai
nless electric haulage shearer,which is suitable for medium-hard coal seamswith ge
ntle i
ncli
natio
n, a
nd it is used togetherwith scraper co
nveyor hydraulic support a
nd so o
n. The mecha
nical tra
nsmissio
n adopts a straight-toothed tra
nsmissio
n system,which ca
n save costs a
nd reduce the difficulty of mai
nte
na
ncewhe
n it ca
nwithsta
nd sufficie
nt loads. I
n this desig
n, the desig
n of the hauli
ng sectio
n of the shearer is mai
nly used. The tractio
n sectio
n of the shearer is mai
nly composed of a tractio
n mecha
nism a
nd a tractio
n sectio
n tra
nsmissio
n device. The gear box i
n the tra
nsmissio
n device is decelerated by two-stage spur gears a
nd has two stages. The pla
netary gears are decelerated a
nd their mai
n fu
nctio
n is to reduce the output speed of the motor to i
ncrease the torque. Fi
nally, the drivi
ng u
nit drives the shearer to adva
nce alo
ng theworki
ng surface. The desig
n task is mai
nly to first determi
ne the program, determi
ne the program after co
nsulti
ngvarious data o
n the tractio
n drive system desig
n, gearbox, shaft, beari
ngs, spli
nes a
nd other parts of the gearbox selectio
n a
ndverificatio
n, etc. I
n the desig
n process, the desig
n ma
nual should be used correctly a
nd the calculatio
n of seeki
ng truth from facts should be do
ne to e
nsure the accuracy of the
numbers i
n the calculatio
ns. We must cultivate our ability to thi
nk i
ndepe
nde
ntly a
nd solve problems i
n a serious ma
n
ner so as to achieve the purpose of this graduatio
n project. Keywords: shearer： tractio
n：sectio
n gearbox：gear：pla
netary gear 目录 摘要i Abstract ii 1绪论1 1.1概述1 1.2采煤机概述2 1.3采煤机的发展史3 1.3.1国外采煤机的发展历程3 2 900kw电牵引采煤机概述6 2.1 900kw电牵引采煤机选用6 2.2采煤机的概述7 2.3采煤机的设计参数7 2.4采煤机的设计目的9 3 MG400/900-WD电牵引采煤机牵引部的设计9 3.1牵引部的概述9 3.2确定采煤机牵引部的传动方案10 3.2.1设计的原则10 3.2.2传动方案的确定11 3.2.3牵引部电动机的选用12 3.2.4牵引部传动比的分配13 3.2.5传动系统中转速、功率和扭矩的计算14 3.3圆柱齿轮的设计16 3.3.1高速级圆柱齿轮的设计16 3.3.2低速级齿轮的设计25 3.4 NGW型二级行星齿轮减速器34 3.4.1高速级设计34 3.4.2低速级计算42 3.5轴的设计50 3.5.1惰轮轴的设计50 3.5.2轴Ⅰ的设计50 3.5.3Ⅱ轴的设计55 3.5.4Ⅲ轴的设计58 3.5.5高速级行星轴组的校核59 3.5.6低速级行星轴组的校核60 3.6花键的校核61 3.6.1轴Ⅰ与电机之间花键校核61 3.6.2轴Ⅲ与齿轮之间花键的校核62 4.牵引部的总体63 4.1机械传动系统63 4.2牵引电动机63 4.3液压制动器65 4.4滑靴组架66 4.5调高油缸66 5采煤机的安装及使用维护66 5.1采煤机的安装66 5.2采煤机的使用及维护68 5.3采煤机的安全操作69 6小结70 7致谢78 参考文献79