Analysis And Research On Vibration Characteristics Of Gearbox Coupling Structure

The gearbox system is widely used to change the speed of the transmission equipment.With the development of modern science and technology,the transmission power of the transmission system is increasing,and the speed is accelerating,which makes the noise and vibration problems of the equipment more and more serious.The structure of gearbox is complex and various,and the vibration coupling problem is serious.Therefore,it is necessary to comprehensively study the dynamic characteristics of the whole gearbox systemIn this paper,we established a dynamic model of the typical gearbox structure,using the vibration energy as the evaluation index to describe the vibration characteristics?On this basis,combined with the finite element method and modal synthesis method,studied the transmission law of vibration energy in gearbox system,and analysed the influence of various parameters on the vibration characteristics of the system.It provides a reliable theoretical basis for the vibration and noise analysis of complex gearbox structures,and is helpful for the improvement of vibration and noise performanceIn this paper,firstly,we analysed the dynamic transmission and deformation relationship of the system,established a dynamic model of typical combined structure:plate-bearing-gear shaft-bearing-plate coupling system in shafting transmission system,,Then we study the relations among the forces and deformations of the model,discuss the theoretical defivmion and calculation of the stiffness of the bearing as a important part in the energy transmission path.Secondly,taking the plate bearing gear shaft bearing plate coupling system as the research object,we established the corresponding multi-dimensional flexible coupling system by using the substructure mobility analysis method.We derived the dynamic transfer equation of the gear shaft and the plate under the meshing excitation,calculated the input power flow of the excitation force to the system and the vibration power flow transmitted to the box plate through the rolling bearing,and got the power flow spectrum of the system.Then we analyzed the influence of the system parameters on the vibration characteristics.Thirdly,we combined the finite element method with the power flow theory,take advantages of the finite element software not limited by the complex structure.Taking the classic single-stage gearbox as an example,analysed the transmission characteristics of power flow in the gearbox structure,and expanded the application of power flow theory in practical engineering.It has important theoretical and engineering significance to effectively analyze the structural vibration of complex transmission system.