以正交面齿轮传动为研究对象,建立面齿轮传动的有限元模型,运用有限元软件A N S Y S Workbenck对该模型进行模态分析,提取该模型的前6阶固有频率和振型进行分析;并研究压力角、齿数差及面齿轮孔径对面齿轮传动固有频率的影响。研究结果表明:面齿轮传动的模态振型以面齿轮振动为主,面齿轮传动固有频率随压力角、齿数差及面齿轮孔径的增大而增大,其中面齿轮孔径对其影响最大,其次是压力角,而齿数差对其影响不大。
建立面齿轮等温点接触弹流润滑模型,通过F O R T R A N语言编程计算面齿轮的油膜厚度和压力;分析小齿轮转速、面齿轮所受载荷和润滑油黏度对面齿轮润滑特性的影响。研究结果表明:转速和润滑油黏度越大,油膜厚度也越大,而载荷越大油膜厚度越小;二次压力峰随转速和润滑油黏度的增大而越明显,但随载荷的增大而趋于消失。
In order to effectively improve meshing performance of spiral bevel and hypoid gears generated by the duplex helical method, the effects of straight lined and circular cutting edges profile on meshing and contact of spiral bevel and hypoid gears were investigated analytically. Firstly, a mathematical model of spiral bevel and hypoid gears with circular blade profile was established according to the cutting characteristics of the duplex helical method. Based on a hypoid gear drive, the tooth bearings and the functions of transmission errors of four design cases were analyzed respectively by the use of the tooth contact analysis(TCA), and the contact stresses of the four design cases were analyzed and compared using simulation software. Finally, the curvature radius of the circular profile blade was optimized. The results show that the contact stresses are availably reduced, and the areas of edge contact and severe contact stresses can be avoided by selecting appropriate circular blade profile. In addition, the convex and concave sides are separately modified by the use of different curvature radii of inside and outside blades, which can increase the flexibility of the duplex helical method.
