Research on application of dynamic optimization modification for an involute spur gear in a fixed-shaft gear transmission system

A gear is the key component of a high-efficiency mechanical transmission. Gear modification can effectively improve the dynamic characteristics of the gear transmission system and reduce the probability of vibration deterioration, wear deviation, and fatigue fracture. Based on the lateral -torsional-pendulum coupling nonlinear dynamic model of a gear transmission system, a dynamic optimization modification technology for an involute spur gear is proposed. The parameters of tooth profile modification are selected as independent variables, the dynamic load factor of the system is used as the optimization objective, and the speed and load torque of the driving wheel are used to establish boundary conditions. The vibration response of the system is compared in the time domain, frequency domain, phase plane, and Poincare ' section, and the maximum Lya-punov exponent is considered. The dynamic characteristic trends of a gear after dynamic modi-fication are analysed. A vibration performance test bench is built to verify the vibration reduction effect of dynamic optimization modification in a fixed-shaft gear transmission system.

Automated summary

This paper proposes a dynamic optimization modification technology that can improve the dynamic characteristics of a mechanical transmission system and reduce the probability of vibration deterioration and fatigue fracture. By comparing and analyzing the vibration response of the gear system, the dynamic characteristics of the modified gear are verified, and the vibration reduction effect of the modification is also verified through vibration performance testing.