2.5MW 풍력발전기 기어박스 동특성 연구

In this study, a gearbox and blade were modeled in the MASTA program, and the housing and carrier components were modeled using a finite element method. Using substructure synthesis, all the components were combined and used to establish a vibration model of a 2.5-MW wind turbine gearbox. In addition, the safety displacement factor was evaluated using an AGMA data sheet about bearing’s outer race for the input shaft and output shaft. As a result, the bearing’s outer race for the input shaft, and the radial and axial responses were satisfied by the 1 st and 2 nd planetary gears and the 3 nd helical gear transmission error(TE), respectively. However, theoutput shaft support bearing’s outer race responses were not satisfied with the radial response by the 2 nd TE and axial response by the 3 rd TE. To reduce the vibration, tooth modification was needed. After profile tooth modification, at the outer race of the output shaft support bearing, the radial response was reduced by approximately 20μm, and the axial response was reduced by approximately 6μm.