The Study Of Dynamic Characteristics And Reliability Of Gear Transmission System Of Wind Turbine

As the traditional energy becomes exhausted and the environment problem gets increasingly serious, wind power has drawn more and more attention as a kind of renewable and green energy. As wind turbine works in complex load environment caused by random varying wind load and is hard to maintain, the reliability of gearbox in the wind turbine becomes a big issue in wind power engineering. Therefore, it is important to study the reliability of the gear transmission system under the condition of actual wind load. The study of the reliability of the transmission system is based on the study of the dynamic characteristics of the transmission system.The objective of this paper is to study the dynamic performance and the reliability of the transmission system of 1.5MW wind generator. The structure of the transmission system is composed of one stage of planetary gear and two stages of parallel shaft helical gear.Concrete research work is as follows:â‘ A random wind model based on Weibull distribution with two parameters is built. Describe the actual wind speed and simulation the wind speed through the wind model is the purpose of random wind model.â‘¡A lumped-parameter method is used to build the dynamic model of the transmission system of the wind turbine, in which varying meshing stiffness, varying meshing error and damping are included.â‘¢The dynamic response of the system, including the displacement and speed of the gear, mesh force of the gear pairs, torque which the shaft transmitted and the frequency response of the transmission system, are investigated. Comparing with the different load and then the dynamic characteristics of the transmission system is investigated.â‘£The fuzzy reliability evaluation model of the gear transmission system and the fuzzy evaluation of the gear box based on the result of the study of the dynamic characteristics of the transmission system are investigated.The research work of this paper has provided some theoretical references for the engineering design of the gear transmission system under varying wind load conditions, and laid the foundation for the industry application.