Study On Load Sharing Performance Of Wind Turbine Gearbox Based On Virtual Prototyping Technology

Wind turbine gearbox is located between the wind wheel and a generator in wind turbines. It is an important part in whole wind turbine drive system which can increase the growth rate and power transmission. Planetary gear transmission structure has been usually applied into MW wind turbine gearbox. But due to the manufacturing and installation errors are inevitable, the elastic components deformation and the influence of factors such as temperature, the load of each planetary gear bear is not equal to each other, which can cause vibration and noise, serious will happen when the tooth broken, system overall fever and harsh conditions. Therefore, the research on the load sharing characteristics of gearbox system has great significance to improve the overall service life of gearbox and the stability of the wind turbine generator.This paper combined with 6-8MW large offshore wind turbine gearbox subject content, with the a wind turbine gearbox as the research object, using virtual prototype software ADAMS to establish the rigid flexible coupling model of gearbox to analysis the system load sharing performance. And also analyzed the flexible pin load balancing mechanism and applied it into the 3MW wind turbine gearbox. This paper main research content is as follows:Firstly, using UG software to establish the a wind turbine gearbox physical model, and import the model into the ADAMS software. The gearbox rigid flexible coupling system model is established by defining material properties, applying constraints and loads, key parts flexible and other settings. The reliability that using Virtual Prototype Technology to research wind turbine gearbox system dynamics characteristics was verified through the gears rotate speed, meshing force and meshing frequency simulation result analysis.Secondly, through the extraction and processing the planetary gear meshing force simulation data to calculate planetary transmission load sharing coefficients of gearbox, And the gearbox were carried out loading test under different working conditions to get the system load sharing coefficient. Through two methods comparative analysis shows that using the method of dynamic simulation to study load carrying capacity of the wind gearbox is reliable.Then, analyzed the flexible pin load balancing mechanism and applied it into the 3MW wind turbine gearbox. Through the Pro/E and the Workbench platform to carry out key sizes optimization design of flexible pin shaft, lastly determined the flexible pin shaft the optimal size of each part.Finally,3MW wind turbine gearbox first stage planetary transmission containing flexible pin shaft structure has been carried out force analysis and strength check, and using virtual prototype technology to research the load sharing performance of the system, the results show that the flexible pin institutions can improve system load sharing performance to a certain extent, And also analyzes other factors such as input speed and load torque effects on the gearbox load sharing performance.