为定量研究齿面磨损（TSW）的振动特性,提出一种基于齿廓修形和摩擦耦合的磨损故障建模方法,并引入最大磨损深度来表征齿面磨损程度。以大型风电机组齿轮箱高速输出轴直齿轮为研究对象,得到对应不同磨损程度下的齿轮时变啮合刚度,并将其代入到齿轮箱8自由度动力学微分方程,在不同转矩条件下对齿轮箱进行动力学仿真,得到不同磨损严重程度和转矩条件下的振动时频域特性。结果表明：仿真结果与实验数据吻合良好,验证了该方法的有效性;随着齿面磨损程度增加、转矩增大,齿轮箱振动、齿轮扭振剧烈;在0.4倍额定转矩附近,齿面磨损引起齿轮箱振动速度、振动加速度最为明显。研究结果可为齿轮磨损故障诊断提供理论指导。
Abstract
In order to quantitatively study the vibration characteristics of tooth surface wear （TSW）, a wear fault modeling method based on tooth profile modification and friction coupling is proposed, and the maximum wear depth is introduced to characterize the degree of tooth surface wear. The high-speed output shaft spur gear of the large-scale wind turbine gearbox is taken as the research object, the time-varying meshing stiffness of the gear corresponding to different degrees of wear is obtained, and it is substituted into the dynamic differential equation of the gearbox with 8 degrees of freedom. The vibration time-frequency characteristics under different wear severity and torque conditions are obtained after gearbox dynamic simulation. The results show that the simulation results are in good agreement with the relevant experimental data, which verifies the effectiveness of the method. The gearbox and the pinion vibrate more severely with the increase of tooth surface wear degree and torque. The vibration and impact load of the gearbox caused by tooth surface wear are the most obvious near 40% rated torque, which provides theoretical guidance for gear wear fault diagnosis.
关键词
风电机组 /
齿轮箱 /
动力学 /
摩擦 /
时变啮合刚度 /
磨损 /
齿廓修形
Key words
wind turbines /
gear box /
dynamics /
friction /
time varying meshing stiffness /
wear /
tooth profile modification
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基金
国家重点研发计划（2018YFB1501304）
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