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Volume 40 Issue 6
Jun.  2014
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Journal of Beijing University of Aeronautics and Astronautics  > 2014  >  40(6): 769-774.
Li Zhufeng, Shao Yunbin, Fu Yongling, et al. Oil gap loss and mechanical efficiency of axial piston electro-hydraulic pump[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(6): 769-774. doi: 10.13700/j.bh.1001-5965.2013.0438(in Chinese)
Citation: Li Zhufeng, Shao Yunbin, Fu Yongling, et al. Oil gap loss and mechanical efficiency of axial piston electro-hydraulic pump[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(6): 769-774. doi: 10.13700/j.bh.1001-5965.2013.0438(in Chinese)
shu

Oil gap loss and mechanical efficiency of axial piston electro-hydraulic pump

doi: 10.13700/j.bh.1001-5965.2013.0438

  • 1. School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;

  • 2. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 30 Jul 2013
  • Publish Date: 20 Jun 2014
    Abstract
  • From the innovation perspective, the structure and working process of axial piston EHP were described. With various mechanical losses analyzed, the mechanical efficiency calculation model of EHP was established and the oil gap loss as well as mechanical efficiency varying with speed, pressure and temperature was respectively presented. The simulation at the temperature of 50 ℃, the speed of 4 000 r/min and the pressure of 28 MPa shows a relatively high working efficiency. The oil gap loss of EHP is 1.737%, which is much lower than the van and mechanical losses of motors in traditional motor-pump set. And the mechanical efficiency is 92.6%, which is higher than traditional motor-pump set. The mechanical efficiency improvement makes the overall efficiency of the axial piston EHP higher than motor-pump set. The influences to the loss by the oil gap length were analyzed, and the result indicates that the oil gap length can be further reduced.

     

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