Volume 34 Issue 11
Nov.  2019
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YAN Yangyang, ZHUANG Baoshun, GAO Peixin. Sealing characteristics of aviation pipeline fittings and influence of fluid temperature[J]. Journal of Aerospace Power, 2019, 34(11): 2414-2422. doi: 10.13224/j.cnki.jasp.2019.11.013
Citation: YAN Yangyang, ZHUANG Baoshun, GAO Peixin. Sealing characteristics of aviation pipeline fittings and influence of fluid temperature[J]. Journal of Aerospace Power, 2019, 34(11): 2414-2422. doi: 10.13224/j.cnki.jasp.2019.11.013

Sealing characteristics of aviation pipeline fittings and influence of fluid temperature

doi: 10.13224/j.cnki.jasp.2019.11.013
  • Received Date: 2019-05-09
  • Publish Date: 2019-11-28
  • The multi-scale finite element simulation method was used to study the sealing characteristics of pipeline fittings. Based on the measured data of rough surfaces, the multi-scale model of pipeline fittings was modelled, sealing state and sealing performance of fittings were obtained by simulating the tightening process of fittings. The results showed that the calculation results based on the multi-scale model could really present seal characteristics of pipeline fittings, and improve the calculation accuracy of pipeline fittings assembly method. In addition, during the process of fittings tightening, thehigh stress zone between pipeline fittings and ferrule diffused to all sides through two high stress zones, and the change of sealing performance of pipeline fittings presented linear change. When the displacement of ferrule reached certain position, the pipeline fittings achieved the optimal assembly state, making it particularly important for the application of pipeline fittings. Besides, the fluid temperature in the allowable range had certain influence on the sealing characteristics of pipeline fittings.

     

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