基于齿轮切向变位分配齿根弯曲应力方法研究  

Study on Allocation Method of Root Bending Stress based on Gear Tangential Modification

作　　者：曹亚光[1] 赵向飞[2] 李秀明[2] 

机构地区：[1]江苏城市职业学院,江苏南通226000 [2]机械科学研究总院,北京100044

出　　处：《机械传动》2015年第6期46-48,79,共4页Journal of Mechanical Transmission

摘　　要：齿轮是机械传动中重要的基础零部件,针对齿轮副传动中小齿轮轮齿薄弱最先发生弯曲疲劳断裂的情况,采用切向变位重新分配大小齿轮齿厚。在中心距和传动比不变的情况下,重新分配齿厚使小齿轮齿根弯曲应力降低,大齿轮齿根弯曲应力增加,从而使相互啮合齿轮的弯曲疲劳寿命近似相等。采用APDL语言对齿轮进行有限元建模,在单齿齿顶加载和啮合状态下进行弯曲应力分析,并与普通齿轮副设计进行比较,结果验证了切向变位重新分配齿根弯曲应力的准确,对解决工程上小齿轮断齿问题具有指导意义。Gear is an important part for mechanical transmission. For the case of bending fatigue fracture pinion during the transmission, the gear tooth thickness is reassigned by tangential modification. The center stance and transmission ratio unchanged, the pinion root bending stress is reduced and the root bending stress pinion is increased by the tooth thickness mately equal. The finite element modeling o stress analysis is carried out at a single tooth reallocation, leading to bending fatigue life of each gear approxi- f gear is carried out by using APDL language, and the bending top loading and meshing gear. Compared to ordinary gear, the re- suits validate that the gear tooth thickness reassigned by tangential modification is accuracy, and it has guidance instructive to solve tooth broke problem of pinion in engineering.

关 键 词：齿轮 切向变位 弯曲应力 疲劳寿命 有限元 

分 类 号：TH132.41[机械工程—机械制造及自动化]