风电渗碳齿轮内部疲劳断裂可靠性研究

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摘要齿轮内部疲劳断裂作为风电渗碳齿轮典型失效形式，是限制风电齿轮箱服役性能提升的瓶颈之一。本文基于应力强度模糊干涉函数和齿轮材料强度退化理论，结合风电LDD载荷与Dang Van多轴疲劳准则建立渗碳齿轮内部疲劳断裂可靠度分析模型，通过与某2MW风电齿轮失效样本进行对比验证了模型的适用性。采用因子试验设计方法分析齿轮硬度梯度和微观修形对内部疲劳断裂失效的影响，通过材料暴露系数回归方程进行望小优化设计获得主因子最佳参数匹配。研究结果表明心部硬度、齿向鼓形对内部疲劳断裂失效影响权重最大，通过优化设计将该齿轮副内部疲劳断裂可靠度由0.968399提高至0.972678。

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	柏厚义1
	2
	朱才朝1
	周烨1
	陈晓金1
	2
	冯厚斌2
	叶伟2

关键词 ：风电齿轮, 轮齿疲劳断裂, 可靠度, 强度退化, 硬度梯度

Abstract：Tooth interior fatigue fracture (TIFF), as the typical failure mode of carburized wind turbine gear, is one of the major limitations to improve the service performance of wind turbine gearbox. This work developed a TIFF reliability analysis model of carburized gear based on the stress-strength interference fuzzy function and material strength degradation theory. The equivalent stress is calculated using load duration distribution method and Dang Van multiaxial fatigue criterion. The model is verified by comparing with gear failure sample coming from a 2MW wind turbine. The effects of gear hardness gradient and micro-modification on TIFF is discussed in detail. The optimization of design parameters is obtained with the regression equation of material exposure. The results show that the core hardness and lead crown are the main influencing factor of TIFF. With the developed optimizing design, the TIFF reliability of discussed gear pair is improved from 0.968399 to 0.972678.

Key words： wind turbine gear tooth interior fatigue fracture reliability strength degradation hardness gradient

收稿日期: 2022-01-10 出版日期: 2023-04-15

引用本文:

柏厚义1,2，朱才朝1，周烨1，陈晓金1,2，冯厚斌2，叶伟2. 风电渗碳齿轮内部疲劳断裂可靠性研究[J]. 振动与冲击, 2023, 42(7): 106-113.
BAI Houyi1,2, ZHU Caichao1, ZHOU Ye1, CHEN Xiaojin1,2, FENG Houbin2, YE Wei2. Study on the reliability of tooth interior fatigue fracture in carburized wind turbine gear. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(7): 106-113.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I7/106

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