Research On The Transmission Design And Investigation On Load Capacity Of Asymmetric Gear With Two Pressure Angles

This article mainly studies the gearing characteristics of the asymmetric gear with two pressure angles and the method of analyzing it, s bending stress and contact stress. Firstly, based on the gearing theories and the gearing conditions, the universal tooth flank curve equations of asymmetric gear with two pressure angles are derived by the gear shape normal method, and the main parameters are formulated. Secondly, the bending stress equations of asymmetric gears with two pressure angles are derived by the cantilever theory of material mechanics and the normal section analytics. Using the software ANSYS of finite elements analysis, the bending stress of asymmetric gears is analyzed. This article compares the bending stress of asymmetric gears with symmetric gears' and studies how the pressure angles influence the bending stress. Some valuable conclusions are educed. Thirdly, the contact stress equations of asymmetric gear with two pressure angles are derived by the Hertz theory of classical contact mechanics. Using the software ANSYS of finite elements analysis, this article analyses the contact stress of asymmetric gear profile. The contact stresses of asymmetric gear profiles' three points are calculated, and this article gets the variation of the contact stress of asymmetric spur gear profiles when the gears are in engagement. The contact stresses of asymmetric gears are compared with symmetric gears'. At last, based on C++Builder and ANSYS program language APDL, a program is developed for the analysis of asymmetric gears' stresses. This program can automatically processes model generating, meshing, FEA of bending stress and contact stress of asymmetric gears.