基于正交设计的大型海上风电齿轮箱多级螺旋角优选研究

以某5 MW海上风电机组两级行星一级平行齿轮箱为研究对象,建立以其第一、二、三级齿轮螺旋角（A、B、C）为三自变量因素,以5°、8°、11°、15°为四离散水平的16组正交试验方案,基于Simpack软件完成对应方案的虚拟样机建模及动力学仿真,对各因素各水平下的均载特性、振动特性进行评估,对正交试验结果的有效性进行验证。研究结果表明：行星级的均载特性主要与该级螺旋角有关,同时受螺旋角影响,一般情况下,螺旋角越大,均载特性越好;影响高速输出轴后轴承位置振动的主要因素为第三级齿轮螺旋角,且当C在8°附近时,振动信号较小。研究结果可为大型海上风电机组齿轮螺旋角精细化设计提供理论支撑。

OPTIMIZATION RESEARCH OF MULTI-STAGE HELIX ANGLES OF LARGE-SCALE OFFSHORE WIND TURBINE GEARBOX BASED ON ORTHOGONAL DESIGN

A two-stage planetary one-stage parallel gearbox of a 5 MW offshore wind turbine is taken as the research object. 16 sets of orthogonal experimental tests are established and simulated within the virtual prototype software Simpack, in which the helix angles （A,B,C） in different stages are independent variables whose values are 5°, 8°, 11°, 15°, respectively. The even load and vibration characteristic under each factor and level is evaluated and the validity of the orthogonal simulation results is verified. The results show that the even load characteristic of the planetary is mainly related to the helix angle of its stage and affected by helix angles in other stages. In general, the larger the helix angle, the better the even load characteristics. The main factor that affects the vibration signal of the rear bearing position of the high-speed output shaft is C, and when the value of C is 8°, the vibration signal is the weakest. The research results provide theoretical support for the meticulous design of the helix angles of large offshore wind turbines.