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Lubrication characteristics of dual piston ring in bent-axis type piston pumps

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Abstract

The bent-axis type of piston pump driven by the piston rod works by the piston rod driving the cylinder block; because of this the taper angle of the piston rod and the swivel angle between the cylinder block and the shaft are important design factors. If these factors cannot satisfy the conditions for optimum design, the friction loss between the cylinder bore and the piston increases, and the pump can fail to work under conditions of severe friction and wear. Since the piston reciprocates in the cylinder bore with high velocity, at the same time rotating on its own axis and revolving on the center of the cylinder block, a decrease of the volume efficiency is generated because of the leakage between the cylinder bore and the piston. Therefore, to prevent this, the piston ring is designed to be at the end of the piston, and the friction characteristics between the piston ring and the cylinder bore require further research due to their great influence on the performance of the piston pump. Thus, in this paper, the elastohydrodynamic lubrication (EHL) analysis of the film thickness, the pressure distribution, and the friction force, have been studied between the piston ring and the cylinder bore in the bent-axis type of piston pump. The analyzed results show that the friction force is influenced by the rotating speed and the discharge pressure.

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Authors and Affiliations

  1. Division of Mechanical System Engineering, Chonbuk National University, Jeonju, Korea

    JaeCheon Jo

  2. School of Dentistry, Chonbuk National University, Jeonju, Korea

    JuMi Park

  3. School of Mechanical & Automative Engineering, Kunsan National University, Kunsan, Korea

    SeokHyung Oh

  4. Division of Mechanical System Engineering And RCIT, Chonbuk National University, Jeonju, Korea

    JaeYoun Jung

Authors
  1. IhnSung Cho
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  2. IlHyun Beak
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  3. JaeCheon Jo
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  4. JuMi Park
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  5. SeokHyung Oh
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  6. JaeYoun Jung
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Corresponding author

Correspondence to JaeYoun Jung.

Additional information

This paper was recommended for publication in revised form by Associate Editor In-Ha Sung

JaeYoun Jung is currently a professor in Chonbuk National University and a director of Library of Chonbuk National University. He is also working as a director of Automobile High-Technology, Research Institute of Chonbuk National University.

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Cho, I., Beak, I., Jo, J. et al. Lubrication characteristics of dual piston ring in bent-axis type piston pumps. J Mech Sci Technol 24, 1363–1368 (2010). https://doi.org/10.1007/s12206-010-0342-3

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  • DOI: https://doi.org/10.1007/s12206-010-0342-3

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