The Transmission Error And The Misalignment Of The Shaft Research Of The MW-level Wind Turbine Gearbox

With wind turbine gearbox trend to the development of the MW-level, the maintenance cost is also increasing,people raise higher demand for the stability. The stimulating caused by the gear transmission error and the misalignment of the shaft is one of the main factors affecting the gear meshing quality and the life of bearing, which has important influence on the stability of wind turbine gearbox system, thus it is necessary to research and optimize the dynamic response caused by the gear transmission error and the misalignment of the shaft to the gear box system.The paper took 2.0MW wind turbine gearbox for example, and established a complete analysis of wind turbine gearbox model with MASTA software, and studied wind dynamic response of wind turbine gearbox transmission system caused by the transmission error and the misalignment of the shaft. Calculating the appropriate tooth profile modification and the misalignment range is to optimize response of the transmission error and the misalignment of the shaft respectively. Establishing the wind gearbox vibration test and compared the vibration test results with theory and simulation results analysis, it verified the simulation results tallies with the actual situation. Mainly includes the following contents.(1) Combined with MASTA and ABAQUS simulation software to establish a complete 2.0MW wind gearbox analysis model, determined the working condition for the subsequent gear transmission error and the misalignment of the shaft.(2) Took the high speed gear pair of the 2.0MW wind power gearbox for example, through the analysis of the gear contact module in MASTA software, contrasted the transmission error under different quantity of tooth profile modification and its response curve.(3) Through the centralized mass method, the rotor system is simplified as a multi-disc system. According to the force balance and the coordination deformation motion system the establishment of the rotor of the differential equations, obtained exciting force and torque.(4) Taking the misalignment between the high gear shaft of the 2.0 MW wind power and motor shaft for example, combining with software harmonic response analysis, analyzed the response of the misalignment shaft in the transmission system on the basis of the above algorithm, and combined with MASTA software to calculate the high-speed shaft bearing of life, thus determining the appropriate misalignment value to provide theoretical basis for the gear box running smoothly.(5) Proceed the vibration test about the 2.0MW wind power gear box, through the acceleration sensor monitoring the vibration level of the bearing on the high speed shaft, through comparing the test results with the simulation results, verified the accuracy and reliability about the response of the transmission error and the misalignment of the shaft.