POWER LOSS IN THE LUBRICATING GAP BETWEEN CYLINDER BLOCK AND VALVE PLATE OF SWASH PLATE TYPE AXIAL PISTON MACHINES

Authors

  • Monika Ivantysynova Purdue University, Department of Agricultural and Biological Engineering, 225 S. University Street, West Lafayette, IN 47907, USA
  • Jonathan Baker Purdue University, Maha Fluid Power Research Center, 1500 Kepner Dr., Lafayette, IN 47906, USA

Keywords:

lubricating gaps, cylinder block-valve plate, axial piston pump, waved surface, energy dissipation

Abstract

The lubricating gaps are the primary source of energy dissipation in piston machines. The paper presents results of a simulation study that investigates the effect that a wave-like micro surface shape variation applied to the valve plate gap surface has on power loss in the cylinder block-valve plate interface. Special attention is given to the relation between gap height, operating parameters, surface design and power loss. The effect of waved surface amplitude and frequency is also studied. Results indicate that power loss in the cylinder block-valve plate interface can be reduced by over 50 % on account of the waved surface compared to the standard cylinder block-valve plate interface design. The effect of the waved surface is most significant at low operating pressures. A special in-house code has been used for this research study. The simulation model covers fluid-structure interaction and micro motion of the cylinder block resulting from oscillating piston forces. Details of the model are explained. The model predicts the pressure and velocity fields generated in the lubricating film and calculates leakage, viscous friction and power loss.

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Author Biographies

Monika Ivantysynova, Purdue University, Department of Agricultural and Biological Engineering, 225 S. University Street, West Lafayette, IN 47907, USA

Monika IvantysynovaBorn on December 11th 1955 in Polenz (Germany). She received her MSc. Degree in Mechanical Engineering and her PhD. Degree in Fluid Power from the Slovak Technical University of Bratislava, Czechoslovakia. After 7 years in fluid power industry she returned to university. In April 1996 she received a Professorship in fluid power & control at the University of Duisburg (Germany). From 1999 until August 2004 she was Professor of Mechatronic Systems at the Technical University of Hamburg-Harburg. Since August 2004 she is Professor at Purdue University (USA). Her main research areas are energy saving actuator technology and model based optimisation of displacement machines as well as modelling, simulation and testing of fluid power systems. Besides the book “Hydrostatic Pumps and Motors” published in German and English, she has published more than 80 papers in technical journals and at international conferences.

Jonathan Baker, Purdue University, Maha Fluid Power Research Center, 1500 Kepner Dr., Lafayette, IN 47906, USA

Jonathan Baker Born in North Carolina, Jonathan received his bachelor’s degree in Physics from Davidson College and Master’s degree in mechanical engineering from Purdue University under the guidance of Professor Monika Ivantysynova at the Maha Fluid Power Research Center. His research interests are related to pump efficiency and lubricating gap design.

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Published

2009-08-01

How to Cite

Ivantysynova, M., & Baker, J. (2009). POWER LOSS IN THE LUBRICATING GAP BETWEEN CYLINDER BLOCK AND VALVE PLATE OF SWASH PLATE TYPE AXIAL PISTON MACHINES. International Journal of Fluid Power, 10(2), 29–43. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/498

Issue

2009: Vol 10 Iss 2

Section

Original Article

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