Spiral bevel gear is widely used in the high-speed stage of various mechanical transmission systems, such as aviation reducer system, because of its large tooth coincidence coefficient, strong bearing capacity and stable movement. However, during the operation of spiral bevel gear, vibration will occur due to the influence of internal excitation and external excitation caused by transmission error, ruler side clearance and time-varying meshing stiffness, which will have a great impact on the stability and reliability of the transmission system. Therefore, it is necessary to study the vibration characteristics of spiral bevel gear, At the same time, it lays a foundation for the research of vibration reduction of spiral bevel gear with additional damping ring in the future.
The analysis of the dynamic characteristics of spiral bevel gear transmission mainly includes the following aspects:
1) Study on meshing stiffness of spiral bevel gear
The time-varying meshing stiffness of teeth is one of the main forms of dynamic excitation of spiral bevel gear system. Determining the meshing stiffness of teeth is an important task in spiral bevel gear dynamics and a necessary prerequisite for dynamic research.
2) Dynamic modeling of spiral bevel gear transmission
Based on the lumped parameter method, an 8-DOF bending model of Spiral Bevel Gear Considering time-varying meshing stiffness, transmission error and tooth side clearance is established Based on the nonlinear dynamic model of torsional shaft coupling vibration, the vibration equation is established and dimensionless.
3) Analysis of dynamic characteristics of spiral bevel gear transmission
The natural characteristics of spiral bevel gear system are studied, and the natural frequency and vibration mode of the system are solved to provide guidance for the tuning of spiral bevel gear transmission; The dynamic response of spiral bevel gear transmission is studied, and the relationship between system design and response is analyzed, which provides a theoretical basis for structural optimization, vibration and noise reduction of spiral bevel gear; Studying the dynamic load characteristics of spiral bevel gear system is of great significance to the strength and reliability design of spiral bevel gear.