드라이브 ㆍ 컨트롤 (Journal of Drive and Control)

  • 제11권2호
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  • Pages.30-35
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  • 2014
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  • 2671-7972(pISSN)
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  • 2671-7980(eISSN)
유공압건설기계학회 (The Korean Society for Fluid Power and Construction Equipment)
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EHA 펌프용 피스톤 슈 정압베어링의 경계 마찰 성능 개선

Performance Improvement of the Hydrostatic Piston Shoe Bearing of an EHA-Piston Pump under Boundary Friction Conditions

  • Hong, Y.S. (Aerospace & Mechanical Engineering, Korea Aerospace University) ;
  • Kwon, Y.C. (Aerospace & Mechanical Engineering, Graduate School, Korea Aerospace University) ;
  • Kim, C.H. (Aerospace & Mechanical Engineering, Graduate School, Korea Aerospace University) ;
  • Lee, S.L. (Aerospace & Mechanical Engineering, Graduate School, Korea Aerospace University) ;
  • Kim, B.K. (Yoowon Industries LTD.) ;
  • Moon, J.S. (Yoowon Industries LTD.) ;
  • Kim, J.H. (Yoowon Industries LTD.)
  • 투고 : 2014.04.15
  • 심사 : 2014.05.31
  • 발행 : 2014.06.01
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초록

The pumps of electro-hydrostatic actuators operate most frequently in boundary lubrication speed range, as they compensate for the position control errors as a control element. When conventional swash plate type piston pumps are applied to electro-hydrostatic actuators, the frictional power losses as well as the wear rate of sliding components, such as piston shoes can increase drastically under the boundary friction condition. In this paper, the power losses of the piston shoes were investigated which were engendered by a frictional solid-to-solid contact and leakage flow rate of their hydrostatic bearing. In order to reduce them, DLC-coating was applied to the swash plate and the ball joint of pistons along with its effects were demonstrated. In addition, it was also shown that the wear rate of the piston shoes could be markedly reduced using the DLC-coated swash plate.

키워드

참고문헌

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피인용 문헌

  1. Performance Improvement of a Swash Plate Type Piston Pump in the Low-Speed Range by a DLC Coating vol.11, pp.4, 2014, https://doi.org/10.7839/ksfc.2014.11.4.025