不同行星架结构的受力仿真分析

Force Simulation Analysis of Different Planet Carrier Structures

行星架在行星轮系中起着重要的连接和支撑作用,实际使用中必须保证其强度和安全性。首先建立了不同销轴根部倒角尺寸、销轴内孔的行星架模型;其次用有限元软件分别分析了两种不同结构下的行星架应力分布情况。结果表明:随着倒角尺寸的增大,销轴根部的应力值变小;随着小孔内径的增加,销轴根部的应力值变大。因此在轻量化设计时,可以对销轴加工一个适当的内孔并合理设置倒角尺寸,就可以改善行星架的受力状态。

The planetary carrier plays an important role in connecting and supporting the planetary gear train, and its strength and safety must be ensured. Firstly, the planetary carrier model of the root chamfer size and pin hole of different pin is established. Secondly, the stress distribution of the planetary carrier under two different structures is analyzed using finite element software. The results show that the stress value of the root of the pin decreases with the increase of the chamfer size. With the increase of the diameter of the hole, the stress value of the root of the pin becomes larger, so it can be processed in the lightweight design. Appropriate bore and a reasonable chamfer size can improve the stress state of the planet carrier.