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Journal of Tsinghua University(Science and Technology)    2022, Vol. 62 Issue (3) : 463-469     DOI: 10.16511/j.cnki.qhdxxb.2021.21.035
MECHANICAL ENGINEERING |
Numerical and experimental research on an adaptive labyrinth seal
ZHAO Juying, XU Yiren, ZHU Tianyi, QI Zhihao, LI Yongjian
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
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Abstract  An adaptive labyrinth seal was developed to improve traditional labyrinth seal wear-resistant capabilities in harsh conditions. A numerical model shows that the floating force is mainly generated by the uneven pressure distribution in the radial clearances of the seal. For gas seals, the hydrostatic effect caused by the pressure difference is the dominant factor for the conditions used in this study, rather than the hydrodynamic effect. The model was also used to analyze the effects of the eccentricity, the groove width and the inlet throttle length on the floating force and leakage rate. Experimental results then show that the sealing capability of this adaptive labyrinth seal is 2.3-3.1 times better than that of a traditional labyrinth seal. In addition, the sealing ring of the adaptive labyrinth seal can float for pressure differences of 0.05-0.30 MPa and responds quickly to changes in the surrounding conditions.
Keywords adaptive seal      labyrinth seal      floating mechanism      floating force     
Issue Date: 10 March 2022
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ZHAO Juying
XU Yiren
ZHU Tianyi
QI Zhihao
LI Yongjian
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ZHAO Juying,XU Yiren,ZHU Tianyi, et al. Numerical and experimental research on an adaptive labyrinth seal[J]. Journal of Tsinghua University(Science and Technology), 2022, 62(3): 463-469.
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http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2021.21.035     OR     http://jst.tsinghuajournals.com/EN/Y2022/V62/I3/463
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
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