Numerical Investigation of the Influence of Part Geometric Tolerances on Piston/Cylinder Interface Performance

Authors

  • Shanmukh Sarode Maha Fluid Power Research Center, Purdue University, Lafayette, Indiana 47905, USA
  • Lizhi Shang Maha Fluid Power Research Center, Purdue University, Lafayette, Indiana 47905, USA
  • Andrea Vacca Maha Fluid Power Research Center, Purdue University, Lafayette, Indiana 47905, USA

DOI:

https://doi.org/10.13052/ijfp1439-9776.2334

Keywords:

Axial piston machines, piston/cylinder interface, manufacturing errors, manufacturing tolerance

Abstract

Manufacturing errors are inevitable in hydraulic machines. The manufactured geometry of solid parts directly governs the performance of these machines. This paper reports an extensive simulation study for manufactured inaccuracies on the performance of the piston/cylinder interface of an axial piston machine using the state-of-the-art simulation tool. The performance of swashplate type axial piston machines is characterized mainly by the three lubricating interfaces including the cylinder block/valve plate, slipper/swashplate and piston/cylinder interface. Among the three lubricating interfaces, the piston/cylinder interface is more sensitive to manufacturing inaccuracies such as roundness and conicity of the solid parts as well as the precision and accuracy of the manufactured nominal diameters of the solid parts. This is because the manufactured geometry of the cylinder bore, and the piston directly affects the height and the shape of the lubricating gap of the piston/cylinder interface. Therefore, the manufacturing form deviations of the solid parts directly affects the viscous friction, leakage flow, wear process and lifetime of such lubricating interfaces. The fully coupled fluid structure thermal interaction model can predict the energy dissipation, viscous friction, leakage flow and the gap height considering the geometry of the solid parts.

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Author Biographies

Shanmukh Sarode, Maha Fluid Power Research Center, Purdue University, Lafayette, Indiana 47905, USA

Shanmukh Sarode received his bachelor’s degree (B.Tech) in Mechanical Engineering from Sardar Vallabhbhai National Institute of Technology, Surat in 2017. He joined Maha Fluid Power Research Center, Purdue University in 2017 and is currently a PhD candidate in the School of Mechanical Engineering at Purdue. His research areas include modelling of hydrostatic and hydrodynamic pumps, electrohydraulic system design, and electrification.

Lizhi Shang, Maha Fluid Power Research Center, Purdue University, Lafayette, Indiana 47905, USA

Lizhi Shang received his B.S. from Huazhong University of science and technology in 2011 and his M.S from New Jersey Institute of Technology in 2013. He joined the Maha Fluid Power Research Center in 2013 and graduated with a PhD degree from Purdue University in 2018 with late Prof. Monika Ivantysynova as his advisor. Dr. Shang joined the Maha Fluid Power Research Center as an assistant professor in 2020. His research interests focus on designing and modelling hydrostatic pumps and motors, hydrodynamic pumps and turbines, fluid power systems, and advanced computational and experimental tribological analysis.

Andrea Vacca, Maha Fluid Power Research Center, Purdue University, Lafayette, Indiana 47905, USA

Andrea Vacca is the Maha Fluid Power Faculty Chair and a Professor at Purdue University. He currently leads the Maha Fluid Power Research Center which was established in 2004 by the late Prof. Monika Ivantysynova. Dr. Vacca completed his studies in Italy (Ph.D. from the University of Florence in 2005), and he joined Purdue University in 2010 after being an Assistant Professor at the University of Parma (Italy). Fluid power technology has been Dr. Vacca’s major research interest since 2002. Dr. Vacca authored the textbook “Hydraulic Fluid Power” by Wiley and more than 150 technical papers, most of them published in international journals or referred conferences. He is chair of Fluid Power Systems and Technology Division (FPST) of the American Society of Mechanical Engineers (ASME), and a former chair of the Fluid Power Division of the Society of Automotive Engineers (SAE). Dr. Vacca is also one of the Directors of the Global Fluid Power Society (GFPS). Furthermore, he is also the Editor in Chief of the International Journal of Fluid Power. Dr. Vacca also received the 2019 J. Braham medal of the Institution of the Mechanical Engineers (IMechE).

References

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Published

2022-09-12

How to Cite

Sarode, S. ., Shang, L. ., & Vacca, A. . (2022). Numerical Investigation of the Influence of Part Geometric Tolerances on Piston/Cylinder Interface Performance. International Journal of Fluid Power, 23(03), 343–362. https://doi.org/10.13052/ijfp1439-9776.2334

Issue

2022: Vol 23 Iss 3

Section

GFPS 2020