机械5

摘要 ZL50型装载机所使用的是行星式动力换挡变速箱。1.对行星式动力换挡变速箱进行分析，计算变速箱的总体参数；2.确定出变速箱各档传动比；3.对行星式变速箱齿轮进行布置设计，并画出变速箱总体布置图；4.针对行星式变速箱的结构设计，这是这次设计中最为重要的地方，通过计算出传动比，设计出变速箱的传动简图，然后进行配齿的计算，可以计算出齿圈、行星轮和太阳轮的齿数，并校核这些零部件的合理性。最后进行齿轮设计；5.对变速箱中轴承、轴、离合器的选择和设计。行星式有着比较显着的特点：运用到船底动力时可以实现功率分流：输入轴和输出轴具有同轴性采用合理的内啮合等，这都使变速箱体积减校它可以作速度的增、减和变化运动，以及运动的合成和分解。这些功能对现代机械传动有着较为重要的意义。设计时对ZL50型装载机匹配了双涡轮液力变矩器。因为它的高效范围较宽，所以可以使设计的变速箱档位数减少，并简化变速箱结构。 关键词：轮式装载机、行星式变速箱 Abstract The type ZL50 loader uses a pla
netary power shift gearbox. 1. of the pla
netary power shift gearboxwas a
nalyzed, the overall parameter calculatio
n of the gearbox; 2. to determi
ne overall gear ratiowas 3.; the layout desig
n of pla
netary gear box, a
nd draw the ge
neral layout of the gearbox; 4. for pla
netary gear box structure desig
n, this is the most importa
nt i
n this desig
n, by calculati
ng the tra
nsmissio
n ratio, tra
nsmissio
n gearbox desig
n diagram, calculatio
n a
nd tooth matchi
ng, ca
n calculate the
number of teeth gear, pla
netary gear a
nd su
n gear, a
nd check the ratio
nality of these parts. Fi
nally, the gear desig
n; 5. pairs of tra
nsmissio
n beari
ngs, shaft, clutch selectio
n a
nd desig
n. Pla
netary has a more promi
ne
nt feature: the use of power to the bottom of the ship ca
n achieve power diversio
n: the i
nput shaft a
nd output shaft are coaxial, usi
ng a reaso
nable i
nter
nal meshi
ng,which all reduce thevolume of the gearbox. It ca
n act as a speed i
ncrease, subtractio
n, a
nd cha
nge moveme
nt, aswell as the sy
nthesis a
nd decompositio
n of motio
n. These fu
nctio
ns are of great importa
nce to moder
n mecha
nical tra
nsmissio
n. Whe
n desig
ni
ng, the ZL50 loader is matchedwith a dual turbi
ne torque co
nverter. Because of itswide ra
nge of efficie
ncy, the desig
n ca
n reduce the
number of tra
nsmissio
n gear boxes a
nd simplify the tra
nsmissio
n structure. Keywords:wheel loader; pla
netary gearbox 目录 1绪论1 1.1动力换挡行星变速箱1 1.2设计程序和公用归纳2 2传动机构设计3 2.1传动比的确定3 2.2传动简图的设计7 2.3简图设计的原则7 2.4传动简图的选择8 2.5传动路线8 3行星机构设计9 3.1配齿计算9 3.2选配齿轮10 3.3齿宽选取11 3.4可由上述的D和m的值计算出齿圈齿数12 3.5同心条件校核12 3.6计算各档行星构件的转速13 4轮的强度校核14 4.1太阳轮的转矩14 4.2受力分析15 4.3校核齿轮的弯曲疲劳强度15 4.4校核齿面接触疲劳强度16 5离合器设计16 5.1确定换档离合器的结构型式16 5.2确定主要参数16 5.3片式离合器的摩擦力矩的计算19 5.4离合器滑磨功验算19 5.5片式离合器油缸计算20 6齿轮设计20 6.1计算载荷的确定20 6.2齿轮的变位和修正21 6.3行星排各齿轮的几何尺寸22 6.4齿轮的强度验算22 6.4.1验算太阳轮与行星轮传动的强度22 6.4.2接触疲劳强度计算23 6.4.3验算行星轮与内齿圈传动的强度24 6.4.4接触疲劳强度计算25 6.5齿轮的材料，加工精度和形状26 7轴的设计26 7.1选择材料26 7.2初选轴径27 7.3轴的强度验算27 7.4轴的刚度验算29 8轴承的选择计算31 8.1轴承的选择原则31 8.2轴承的强度校核及寿命计算31 致谢34 参考文献35