中国机械工程 ›› 2023, Vol. 34 ›› Issue (09): 1009-1018.DOI: 10.3969/j.issn.1004-132X.2023.09.001

• 机械基础工程 • 上一篇    下一篇

重型磁悬浮转子跌落保护轴承失效机理

李子麟1;时振刚2;铁晓艳3;杨国军2;任文亮3;姚佳康1;王玉明1;王子羲1   

  1. 1.清华大学机械工程系摩擦学国家重点实验室,北京,100084
    2.清华大学核能与新能源技术研究院,北京,100084
    3.洛阳轴承研究所有限公司,洛阳,471039
  • 出版日期:2023-05-10 发布日期:2023-05-29
  • 通讯作者: 王子羲(通信作者),男,1973年生,副研究员。研究方向为磁悬浮轴承技术、磁力传动技术和密封技术等。E-mail:zxwang@tsinghua.edu.cn。
  • 作者简介:李子麟,男,1996年生,博士研究生。研究方向为磁悬浮轴承、保护轴承。
  • 基金资助:
    国家重点研究发展计划(2018YFB2000102)

Failure Mechanism on Touchdown Bearings of Heavy Maglev Rotor Drop

LI Zilin1;SHI Zhengang2;TIE Xiaoyan3;YANG Guojun2;REN Wenliang3;YAO Jiakang1;WANG Yuming1;WANG Zixi1   

  1. 1.State Key Laboratory of Tribology,Tsinghua University,Beijing,100084
    2.Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing,100084
    3.Luoyang Bearing Research Institute Co.,Ltd.,Luoyang,Henan,471039
  • Online:2023-05-10 Published:2023-05-29

摘要: 国家重点研发计划《高速精密悬浮轴承》对保护轴承跌落承载能力的要求是:转子质量不小于3000 kg,跌落转速不小于3000 r/min,抗跌落次数不小于10。基于此开展了对保护轴承设计研发及跌落失效机理的研究。提出了两种适用于跌落工况的陶瓷球混合保护轴承方案:满装球无保持架方案和非满装球带保持架方案。搭建了包含动力学、热学在内的转子跌落仿真模型,对不同方案跌落过程的受力和发热过程进行了仿真。将保护轴承安装到试验台架中进行测试,验证了仿真模型的有效性。在测试中发现无保持架保护轴承发生严重失效。对失效轴承的损伤情况进行观察和检测,发现由于滚动体间摩擦因数大,滚动体发生卡死现象,使滚动体与滚道、内圈与转子间发生持续干摩擦,造成内圈严重烧伤与磨损。

关键词: 磁悬浮轴承, 保护轴承, 转子跌落, 轴承损伤, 失效机理

Abstract: For the national key R&D program “high-speed precision suspension bearing”, the requirements for the drop capacity of TDBs were: rotor mass ≥3000 kg, drop speed ≥3000 r/min, and successful drops ≥10 times. Based on this, the research and development of TDBs drop failure mechanism were carried out. Two hybrid TDBs with ceramic balls suitable for drop conditions were proposed: full complement ball without cage scheme and non-full complement ball with cage scheme. A rotor drop simulation model was built including dynamics and thermal. The force and heating processes of the drop processes were simulated. The effectiveness of the simulation model was verified by mounting the TDBs in the test bench for experiments. TDBs without cage are found to have failed severely. The damages of the failed bearing are detected, and it is observed that due to the large friction coefficient between the rolling elements, the rolling elements are seized up, resulting in continuous dry friction between the rolling elements and the raceways, and between the inner ring and the rotor, and serious burns and wear of the inner rings.

Key words: active magnetic bearing, touchdown bearing(TDB), rotor drop, bearing damage, failure mechanism

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