螺旋锥齿轮啮合热特性分析

在对螺旋锥齿轮啮合方程进行分析的基础上,采用“自底向上”的实体建模方法和八节点六面体等参元,建立其三齿的有限元分析3-D模型,并基于热传导理论,建立了螺旋锥齿轮啮合的本体稳态温度场;由此,对热和结构两个物理场进行耦合,仿真分析了螺旋锥齿轮啮合过程热应力和热变形。结果表明,螺旋锥齿轮副多齿啮合时,其中一个齿的啮合中心处稳态温度较高;最大热应力与热变形不在啮合中心,而是分别在靠近啮合中心的齿根和齿顶部位。

Analysis of Thermal Aspects for Bevel Gear Meshing

Based on the analysis of meshing equations of bevel gears, the method of setting solid model was used by bottom-up and 8-nodes element of hexahedron, and its finite element 3 -D model of three gear teeth was established. According to the theory of heat conduction, the bulk static temperature field of the model was obtained. Then by coupling of the two physical fields of thermal and structure, its thermal stress and thermal deformation were simulated and analyzed. The analysis results show these important conclusions as follow. Firstly, while many teeth of bevel gear are meshing, the bulk static temperature of meshing center of one tooth is highest. Secondly, the place of greatest thermal stress does not locate at its meshing center, but its tooth root. Thirdly, the place of the greatest thermal deformation is the tooth top.