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.
出处
《机械传动》
CSCD
北大核心
2015年第6期46-48,79,共4页
Journal of Mechanical Transmission
关键词
齿轮
切向变位
弯曲应力
疲劳寿命
有限元
Gear Tangential modification Bending stress Fatigue life Finite element
