面向风电齿轮箱油温超限故障的热网络模型及其节点温度计算方法研究

doi:10.3901/JME.2022.09.119

摘要/Abstract

摘要： 风电齿轮箱油温超限是风力发电场中发生频率较高的故障。针对该问题，在分析风电齿轮箱结构、运行控制策略的基础上，研究了风电齿轮箱内部及其外循环冷却系统的热力学行为，构建了风电齿轮箱热网络模型。该模型中，各节点温度由所建立的瞬态温度和稳态温度热力学方程组计算确定。结合风电齿轮箱的热力学行为，研究了热力学方程组中热量计算模型和热交换中节点间的热阻计算方法，形成了风电齿轮箱热网络模型计算流程。应用热网络模型及其计算流程，仿真计算了某1.5 MW风电齿轮箱实际工况下的齿轮箱油温、高速级HSS-A B C轴承温度和齿轮箱入口油温。对比了仿真计算值和实测值，结果表明热网络模型应用于风电齿轮箱油温超限具有有效性。计算值和实测值的误差分析也为进一步精细建模提供了方向。

关键词: 风电齿轮箱, 油温超限, 热网络法, 故障诊断

Abstract: The lubrication oil temperature overrun fault of wind turbine gearbox is one of the most frequent faults in some wind farms. Aimed at this overrun fault, the thermodynamic behaviours of the internal parts and external circulation cooling system of wind turbine gearbox are studied based on the analysis of the gearbox structure and its operation control strategy. Then, the thermal network model of wind turbine gearbox is proposed. In this model, the temperature of each node is calculated by the established thermodynamic equations of transient and steady-state temperature. Combined with the thermodynamic behaviour of wind turbine gearbox, the computation of heat source and thermal resistance between nodes in the heat exchange process are studied for the thermodynamic equations. After that, the calculation process of the wind turbine gearbox thermal network model is formed. Consequently, the thermal network model and its calculation process are applied to simulate the gearbox oil temperature, the high-speed HSS-A B C bearing temperature and the gearbox inlet oil temperature of a typical 1.5 MW wind turbine gearbox under working condition. The compared results between simulated values and measured values show that the established thermal network model is effective for wind turbine gearbox oil temperature overrun fault. Moreover, the error analysis of the simulated values and measured values also provides a direction for further fine modelling.

Key words: wind turbine gearbox, oil temperature overrun fault, thermal network, fault diagnosis

中图分类号:

TH17

向东, 韦尧中, 沈银华, 孙欣宇. 面向风电齿轮箱油温超限故障的热网络模型及其节点温度计算方法研究[J]. 机械工程学报, 2022, 58(9): 119-135.

XIANG Dong, WEI Yaozhong, SHEN Yinhua, SUN Xinyu. Research on Thermal Network Modeling and Temperature Calculation Method for Wind Turbine Gearbox Lubrication Oil Temperature Overrun Fault[J]. Journal of Mechanical Engineering, 2022, 58(9): 119-135.

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