Volume 30 Issue 11
Nov.  2015
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Article Navigation >  Journal of Aerospace Power  > 2015  >  30(11): 2721-2729
WU Xiao-feng, LIU Chun-jie, GAN Wei-min, WANG Xiao-jun, HU Shao-gang, JI Jing-jing. Robust design of external gear pump with trapped oil problem[J]. Journal of Aerospace Power, 2015, 30(11): 2721-2729. doi: 10.13224/j.cnki.jasp.2015.11.021
Citation: WU Xiao-feng, LIU Chun-jie, GAN Wei-min, WANG Xiao-jun, HU Shao-gang, JI Jing-jing. Robust design of external gear pump with trapped oil problem[J]. Journal of Aerospace Power, 2015, 30(11): 2721-2729. doi: 10.13224/j.cnki.jasp.2015.11.021
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Robust design of external gear pump with trapped oil problem

doi: 10.13224/j.cnki.jasp.2015.11.021

  • School of Mechanical and Vehicle Engineering, Changzhou Institute of Technology, Changzhou Jiangsu 213002, China

  • Received Date: 2014-04-02
  • Publish Date: 2015-11-28
    Abstract
  • Based on the fluid dynamic characteristics of gear pump, a robust design method was proposed to solve the large noise, low volume efficiency in external gear pump caused by high pressure of trapped oil. A type of high pressure gear pump was used as the research object, modeled and simulated by CFD professional software PUMPLINX. The effects on trapped oil pressure by cat eye type unloading groove structure parameters, gear pump speed, load pressure and medium characteristics were analyzed. An approximate model of trapped oil pressure was built based on the design of experiments and response surface function methods. Finally, in order to reduce the impact of uncontrollable of factors such as pump speed, load pressure and medium characteristics on pump performance, the robust performance evaluation model was built to optimize the cat type unloading groove structure parameters and achieve the trapped oil pressure model subjecting to normal distribution in the case of the minimum mean square error. Besides, with the change of random and uncontrollable factors, the robust performance of trapped oil pressure was verified; the result displayed that the trapped oil pressure peak before robust design fluctuated from 40% to 18% after robust design, so the stability and reliability of working pump were improved.

     

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