针对风电增速箱故障率偏高的问题,在对风电机组传动系统的振动响应机理进行分析的基础上,提出一种同时考虑齿根裂纹与齿面摩擦2种因素耦合情况下计算风电增速箱行星轮系动态响应的方法。首先分析考虑不同滑动摩擦因素时,含齿根裂纹缺陷的齿轮其啮合刚度的变化情况;随后运用集中参数法建立一种同时考虑平移和扭转2种力学效应相互影响作用的行星轮系动态响应计算模型。使用该模型在考虑齿根裂纹、齿面滑动摩擦2种因素耦合情况下,对行星轮系时变啮合刚度影响作用进行仿真计算。结果表明,齿面间的滑动摩擦力将导致行星齿轮扭转振动响应在低频区域受到抑制、中频区域得到增强,而齿根裂纹会导致系统出现调制效应且该效应会使行星齿轮的扭转振动频谱响应在行星轮与太阳轮间的啮合频率附近出现调制边频带现象。
Abstract
Aiming at the high failure rate of wind power gearboxes, a way to calculate the transient performance of the wind energy gearbox's planetary gear set under the recombination of the root crack and tooth surface friction is posited based on an analysis of the vibration response mechanism of the wind energy transmission system. Firstly, analyze meshing stiffness of gears containing root crack defects, considering different sliding friction factors. Subsequently, using the lumped parameter method, a dynamic response calculation model of the planetary gear system that considers the interaction of the two effects of translation and torsion is established. By accounting for the coupling of the root crack and the sliding friction, the model is used to simulate the effect of time-varying mesh stiffness on the planetary wheel system. The results show that the sliding friction between the tooth surfaces causes the low-frequency region of planetary gear torsional vibration to be suppressed and the intermediate frequency region to be enhanced. Tooth root cracking causes modulation effects in the system, resulting in modulation sidebands in the response of the torsional vibration spectrum around the meshing frequency between the planetary gear and the sun gear.
关键词
风电机组 /
行星齿轮 /
齿根裂纹 /
动态响应 /
滑动摩擦 /
耦合效应
Key words
wind turbines /
planetary gear transmission /
gear crack fault /
dynamic response /
sliding friction /
coupling effect
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基金
国家自然科学基金（51675253）; 兰州理工大学红柳一流学科建设项目
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