轮边减速器太阳轮失效原因分析及改进  

Failure Analysis and Improvement of Sun Gear in Wheel-side Reducer

作　　者：李贵强 朱亮 程金林 袁其旺[1] 闫书法 LI Guiqiang;ZHU Liang;CHENG Jinlin;YUAN Qiwang;YAN Shufa(Automotive Research Institute,China National Heavy Duty Truck Group Company Limited,Jinan 250101,China)

机构地区：[1]中国重型汽车集团有限公司汽车研究总院,山东济南250101

出　　处：《汽车实用技术》2024年第24期48-51,共4页Automobile Applied Technology

摘　　要：为了解决驱动桥总成齿轮弯曲疲劳台架试验中轮边减速器太阳轮失效问题,文章对失效太阳轮的宏观形貌、化学成分、金相组织、硬度及硬化层深度等方面进行综合分析,推测太阳轮失效原因为齿轮受力偏载。基于MASTA软件对驱动桥总成进行有限元分析,发现太阳轮的齿轮接触疲劳安全系数小于1而且与行星轮之间存在明显的边缘接触。因此,推断出太阳轮失效的原因为齿轮受力偏载导致齿面局部应力过大。针对太阳轮失效原因进行改进,将太阳轮的齿宽增加10mm并进行齿轮修形,失效问题解决。该研究为太阳轮失效原因分析及改进提供了依据。In order to solve the failure problem of the sun gear of wheel-side reducer in the drive axle assembly gear fatigue bench test,the comprehensive analysis of macro profile,chemical composition,metallographic structure,hardness and hardened depth of the failure sun gear is carried out.This paper supposes the failure cause of the sun gear is the unbalance load.The finite element analysis of the drive axle assembly based on MASTA shows that the safety factor of gear contact fatigue is less than 1 and the contact between the sun gear and the planet gear is unbalanced.Therefore,it is inferred the failure cause of the sun gear is the unbalance load of gear causes excessive local stress on tooth surface.In order to improve the failure cause of the sun gear,the tooth width of the sun gear is increased by 10 mm and the gear shape is modified.The failure problem is solved.This study provides a basis for the failure analysis and improvement of sun gear.

关 键 词：轮边减速器 太阳轮 失效分析 

分 类 号：U463.2182[机械工程—车辆工程]