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A simplified calculation model for the sliding contact boundaries in a hydrostatic piston mechanism

  • Jung-Hun Shin
  • Kum-Won Cho
Article
  • 8 Downloads

Abstract

The objective of this study was to discuss simplified calculation models for the piston/cylinder sliding mechanism in which boundary contact partly occurs invariably. An efficient prediction of the boundary leakage and friction is often needed, such as in a swash-plate axial piston machine whose lubrication test is hard to perform due to the mechanism complexity. In order to model this physically uncertain lubrication regime, two calculation models were compared to compute the lubrication behaviors: “rigid boundary model”, whose theoretical concept was previously reported in the literature, and “elastic boundary model”, newly proposed in this study. Developed numerical algorithms commonly facilitated the simultaneous calculation of body motion and fluid film pressure to observe piston motion, reaction forces, and power loss. The results showed that simulations using the elastic boundary model should be more helpful for the prediction in the earlier development stage than the previous model since the methodology provides much less simulation time than full-order calculation, higher accuracy than the rigid model, and useful engineering parameters such as surface stress. The proposed calculation model can be extended to various asymmetrically loaded reciprocating piston mechanisms for efficiently predicting the lubrication behavior.

Keywords

Boundary lubrication model Hydraulic engineering Numerical calculation Reciprocating piston mechanism 

Notes

Acknowledgements

This research was supported by the EDISON Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science & ICT (No. NRF-2011-0020576), and also by KISTI program (No. K-18-L12-C06)

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.Korea Institute of Science and Technology InformationDaejeonRepublic of Korea

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