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清华大学学报(自然科学版)  2022, Vol. 62 Issue (9): 1532-1538    DOI: 10.16511/j.cnki.qhdxxb.2022.22.045
  机械工程 本期目录 | 过刊浏览 | 高级检索 |
船用柴油机曲轴箱轴端密封试验研究与改进
曹恒超1, 徐乙人2, 孙楠楠1, 韩承敏1, 朱桂香1, 李永健2
1. 潍柴动力股份有限公司, 潍坊 261061;
2. 清华大学 摩擦学国家重点实验室, 北京 100084
Experimental investigation to improve marine diesel engine crankcase shaft seals
CAO Hengchao1, XU Yiren2, SUN Nannan1, HAN Chengmin1, ZHU Guixiang1, LI Yongjian2
1. Weichai Power Co., Ltd., Weifang 261061, China;
2. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
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摘要 为研究某大型船用柴油机曲轴箱的轴端密封漏油问题,建立了面向气液两相介质的密封试验装置。通过试验获得了不同转速条件下空气和滑油的泄漏速率,定量地研究了密封装置中的甩油环、迷宫齿槽及回油通道等结构的减漏作用。为适应曲轴箱轴端密封大轴径、大间隙的特点,提出了基于刷式密封的改进方案。利用刷式密封的多孔介质模型分析了安装密封刷环对泄漏和流场的影响,并在试验装置上验证了刷式密封的减漏效果。试验结果表明:增加刷式密封后空气泄漏速率降幅达76%,漏油速率降幅达79%。
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曹恒超
徐乙人
孙楠楠
韩承敏
朱桂香
李永健
关键词 柴油机曲轴箱迷宫密封刷式密封两相流    
Abstract:A sealing leakage test system for gas-liquid mixtures was developed to measure oil leakage from shaft seals on large marine diesel engine crankcases. The air and oil leakage rates were then measured for various rotational speeds and the leakage reducing function of the oil slinger, labyrinth grooves and oil return channels were studied quantitatively. A brush seal design was then developed that was appropriate for the large shaft diameters and large clearances in crankcase shaft seals. A porous media model of the brush seal was then used to analyze the influence of the brush seal on the leakage and the flow field. The effect of the brush seal on the leakage was also studied on the sealing leakage test system. The results show that the brush seal reduces the air leakage rate by 76% and the oil leakage rate by 79%.
Key wordsdiesel engine crankcase    labyrinth seal    brush seal    two-phase flow
收稿日期: 2022-04-12      出版日期: 2022-08-18
基金资助:李永健,副教授,E-mail:liyongjian@tsinghua.edu.cn
引用本文:   
曹恒超, 徐乙人, 孙楠楠, 韩承敏, 朱桂香, 李永健. 船用柴油机曲轴箱轴端密封试验研究与改进[J]. 清华大学学报(自然科学版), 2022, 62(9): 1532-1538.
CAO Hengchao, XU Yiren, SUN Nannan, HAN Chengmin, ZHU Guixiang, LI Yongjian. Experimental investigation to improve marine diesel engine crankcase shaft seals. Journal of Tsinghua University(Science and Technology), 2022, 62(9): 1532-1538.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2022.22.045  或          http://jst.tsinghuajournals.com/CN/Y2022/V62/I9/1532
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
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