Cause analysis for tooth broken in high speed shaft of wind turbine gear box

SHI Zhigang; CAI Hui; CUI Xionghua; HOU Zhaotang; LIU Xuefeng; HE Xiaodong; ZHAO Feng

doi:10.19666/j.rlfd.202103065

English

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Cause analysis for tooth broken in high speed shaft of wind turbine gear box

Thermal Power Generation Vol. 50, Issue 10, Pages: 173-178(2021)

更新时间：2025-09-28

- Cause analysis for tooth broken in high speed shaft of wind turbine gear box
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202103065
  CLC： TM315
- Published：2021
- 稿件说明：
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SHI Zhigang, CAI Hui, CUI Xionghua, et al. Cause analysis for tooth broken in high speed shaft of wind turbine gear box[J]. Thermal Power Generation, 2021, 50(10): 173-178.
DOI：

SHI Zhigang, CAI Hui, CUI Xionghua, et al. Cause analysis for tooth broken in high speed shaft of wind turbine gear box[J]. Thermal Power Generation, 2021, 50(10): 173-178. DOI： 10.19666/j.rlfd.202103065.

摘要

针对某风电机组齿轮箱高速轴出现的断齿现象

对样品进行了宏观检查、化学成分分析、室温拉伸和冲击试验、基体硬度试验、渗碳硬化层深度测试、金相分析、断口形貌分析及能谱分析。试验分析结果表明:高速轴样品的齿面存在载荷不均现象

淬硬层深度不符合相关技术要求的规定

基体的室温冲击吸收能量处于较低水平;样品存在齿面剥落和端齿折断2类损伤现象

其失效模式为疲劳开裂

产生原因与其运行中齿面载荷不均及齿面淬硬层深度不够有关。

Abstract

In view of the tooth breaking phenomenon in high-speed shaft of a wind turbine gearbox of a wind turbine unit

the macroscopic examination

chemical composition analysis

tensile test at room temperature

impact test at room temperature

matrix hardness test

carburizing hardening layer depth test

metallographic analysis

fracture morphology analysis and energy spectrum analysis of the sample were carried out. The results show that

the uneven load existed on the tooth surface of the high speed shaft sample

the depth of the hardened layer did not conform to the requirement of the material sheet

and the shock absorption energy of the substrate at room temperature was at a low level. There were two kinds of damages

namely tooth surface damage and end tooth fracture. The failure mode is fatigue cracking

which is related to the uneven load on the tooth surface and the insufficient depth of hardened layer.

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