Stress Analysis And Tooth Profile Optimization Of Asymmetric Involute Gear With Two Pressure Angles

This article mainly analyzed the bending stress and contact stress of the asymmetric involute gear with two pressure angles by using ANSYS. The first-order method has been used to optimize the tooth profile curve and different design parameters obtained different optimized results.Firstly, based on the involute gear meshing theories and the involute gear characteristics, and used involute equation and the transition curve equation, the general equation of the asymmetric involute gear with two pressure angles have been established, and the main parameters have been calculated. Using APDL language, the parameterized model of the asymmetric involute gear with two pressure angles have been established.Secondly, the bending stress and contact stress of the asymmetric involute gear with two pressure angles have been analyzed by using ANSYS. This article studied how the pressure angles influence the bending stress and the contact stress and obtained the change rule with the pressure angles and compared the bending stress and the contact stress of asymmetric gear with symmetric gears.The results showed: one side pressure angle unchanged, the other side pressure angle increased, the gear tooth root bending stress significantly reduced, and the non-working side pressure angle unchanged, the work side pressure angle increased, the gear tooth contact intensity increased certainly.Finally, based on analysis results, using the first-order optimization method, all parameters of the asymmetric involute gear with two pressure angles were optimized. The different design parameters have been obtained different optimization results. The number of design variables and constraint variables directly affected the optimization result. More design variables are used, more ideal results are got. More constrained variables are used, more easily accessed to the local excellent value. Therefore, in the optimization process, the design variables should be increased and the constrained variables should be reduced, in order to get globally optimal results.Asymmetric gear with two pressure angles has distinct advantages which the symmetric gear does not have when he doing one-way drive. Therefore, asymmetric gear design has great theoretical and practical significance.