| WAN Shan-hong,CHEN Jia-lin,YU Xing-zhi,YI Ge-wen,WANG Jun-yang,WANG Xian-jing,ZHANG Xue-jun.Wear Failure Analysis of High Speed and Vacuum Bearings for Medical Systems[J],51(8):272-283 |
| Wear Failure Analysis of High Speed and Vacuum Bearings for Medical Systems |
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| DOI：10.16490/j.cnki.issn.1001-3660.2022.08.023 |
| KeyWord:rotating anode X-ray tube high-speed bearing wear mechanism high temperature and vacuum tribology |
| Author | Institution |
| WAN Shan-hong |
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou , China |
| CHEN Jia-lin |
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou , China;School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou , China |
| YU Xing-zhi |
China Electronics Technology Vacuum Electronic Technology Co., Ltd., the 12th Research Institute of China Electronics Technology Group Corporation, Beijing , China |
| YI Ge-wen |
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou , China |
| WANG Jun-yang |
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou , China |
| WANG Xian-jing |
China Electronics Technology Vacuum Electronic Technology Co., Ltd., the 12th Research Institute of China Electronics Technology Group Corporation, Beijing , China |
| ZHANG Xue-jun |
China Electronics Technology Vacuum Electronic Technology Co., Ltd., the 12th Research Institute of China Electronics Technology Group Corporation, Beijing , China |
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| Abstract: |
| This article reported the macroscopic and microscopic study on the wear-out failure of bearings and, further explored the state-of-art lubricants in the rotating anode X-ray tube for medical devices from the view of vacuum lubrication. The techniques including Optical Microscope (OM), Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM) and Electron Dispersive Spectrum (EDS) were adopted to characterize the worn morphology, chemical composition and lubricating medium over the bearings components. The results showed that the bearings in the rotating anode X-ray tube was made of SKH4 or M50 steel, while the lubricant materials were MoS2 and Pb-Cu alloy respectively. As compared with Pb-Cu alloy solid lubrication approach, MoS2 solid lubricant was prone to produce wear debris and dust phenomenon. It was found the main failure at the outer and inner raceway of the cold end of bearing resulted from abrasion, while predominant abrasive wear and fatigue symptoms occurred at the hot end of bearing. Moreover, electrical ablation and pitting corrosion were found at the localized regions of bearing components due to arc discharge at the contacting interface. The typical cause of the bearing failure in the rotating anode X-ray tube was attributed to wear, the developing trend of lubrication for the bearing components in the the rotating anode X-ray tube at present and in the coming long period of times was perceived. |
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