软带缺陷导致盾构机主推力轴承套圈失效分析

doi:10.13251/j.issn.0254-6051.2023.12.047

金属热处理 ›› 2023, Vol. 48 ›› Issue (12): 285-291.DOI: 10.13251/j.issn.0254-6051.2023.12.047

软带缺陷导致盾构机主推力轴承套圈失效分析

钟云飞^1,2, 李天夫², 屈伸², 张哲峰², 黄宏军¹

1.沈阳工业大学材料科学与工程学院, 辽宁沈阳 110870;
2.中国科学院金属研究所, 辽宁沈阳 110016

收稿日期:2023-08-03 修回日期:2023-11-09 出版日期:2023-12-25 发布日期:2024-01-29
通讯作者: 黄宏军,教授,E-mail: huanghong1977@163.com
作者简介:钟云飞(1996—),男,硕士,主要研究方向为轴承失效分析,E-mail: 994452717@qq.com。
基金资助:
中国科学院战略性先导科技专项(C类)(XDC04040501)

Failure analysis of shield machine main thrust bearing ring caused by soft belt defects

Zhong Yunfei^1,2, Li Tianfu², Qu Shen², Zhang Zhefeng², Huang Hongjun¹

1. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang Liaoning 110870, China;
2. Institute of Metals, Chinese Academy of Sciences, Shenyang Liaoning 110016, China

Received:2023-08-03 Revised:2023-11-09 Online:2023-12-25 Published:2024-01-29

摘要/Abstract

摘要： 某型号盾构机用主轴轴承在测试过程中发生失效,拆卸后发现其主推套圈滚道表面局部存在大面积剥落以及一些金属碎块。轴承主推套圈由42CrMo合金钢制成,并采用感应淬火工艺使滚道表面获得硬化层。试验通过宏观检查、成分分析、微观组织观察、硬度分析等,提出了盾构机轴承失效机制。结果表明,盾构机轴承主推套圈的软带区域组织因接触疲劳引起局部高温导致表面形成白色蚀刻层,白色蚀刻层剥落进一步造成滚道严重的磨粒磨损。磨粒随滚动体发生转移,在硬化区域产生密集的压痕坑,部分磨粒嵌入软带区域,滚道表面粗糙度严重增加阻碍轴承正常运行,最终导致失效。

关键词: 盾构机轴承, 42CrMo钢, 接触疲劳, 磨粒磨损, 失效分析

Abstract: After conducting testing on a certain type of shield machine, it was discovered that the spindle bearing had failed. Upon disassembly, large spalling pits and metal fragments were found in the part of the bearing raceway. The bearing ring, made of 42CrMo alloy steel, had undergone induction quenching to harden its surface. Analysis of the failure was carried out through macroscopic inspection, composition analysis, microstructure observation, and hardness analysis. The results sholo that the high temperature generated by contact fatigue in the soft belt area of the shield bearing ring results in the formation of a WEL (white etching layer) on the surface. The peeling of this layer further leads to severe abrasive wear on the raceway surface. As the wear particles transfer with the rolling body, they cause dense indentation pits in the hardened area, with some of the particles becoming embedded in the soft belt area. The increase of raceway surface roughness significantly impedes the bearing's normal operation, and finally leading to the failure.

Key words: shield machine bearing, 42CrMo steel, contact fatigue, abrasive wear, failure analysis

中图分类号:

钟云飞, 李天夫, 屈伸, 张哲峰, 黄宏军. 软带缺陷导致盾构机主推力轴承套圈失效分析[J]. 金属热处理, 2023, 48(12): 285-291.

Zhong Yunfei, Li Tianfu, Qu Shen, Zhang Zhefeng, Huang Hongjun. Failure analysis of shield machine main thrust bearing ring caused by soft belt defects[J]. Heat Treatment of Metals, 2023, 48(12): 285-291.

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软带缺陷导致盾构机主推力轴承套圈失效分析

Failure analysis of shield machine main thrust bearing ring caused by soft belt defects

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