Modelling and experimental validation of the displacement of a check valve in a hydraulic piston pump

Authors

  • Anthony L. Knutson Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN, USA http://orcid.org/0000-0002-1391-3576
  • James D. Van de Ven Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN, USA

DOI:

https://doi.org/10.1080/14399776.2016.1160718

Keywords:

Hydraulic valve, check valve, laser triangulation, stiction, flow forces, experimental validation

Abstract

A variety of methods have previously been applied to modelling hydraulic check valves. While the theoretical framework has been established, robust experimental validation of check valve models is lacking. When present, validation methods typically rely on measurements of pressure differential or flow rates, from which check valve dynamics are inferred. In this paper, a lumped parameter model is constructed for a disc style check valve used to control the inlet and outlet flow of a piston pump. Pressure, spring, contact, stiction, and flow forces are investigated to determine which have a significant effect on the check valve dynamics. An experimental pump circuit is constructed and an acrylic sight glass is installed on the check valve manifolds. A method of directly measuring the check valve position during operation using a Laser Triangulation Sensor (LTS) is developed by applying Snell’s law to the air-acrylic and acrylic-oil interfaces and calculating laser refraction to obtain a relationship between valve position and LTS voltage output. Modelled valve position and flow rates are compared to experimental data for three sets of operating conditions – baseline, high speed, and high pressure. In all three cases, modelled inlet and delivery valve displacement closely agree with experimental measurements. Error between predicted and measured flow rates is less than 3% for all cases.

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Author Biographies

Anthony L. Knutson, Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN, USA

Anthony L. Knutson is a PhD student at the University of Minnesota in the Department of Mechanical Engineering. He conducts research in the Mechanical Energy and Power Systems Laboratory, which he first joined as an undergraduate in 2013. Anthony’s research interests are broad and include hydraulic circuit modelling and experimental design, medical device design, and computational fluid dynamics.

James D. Van de Ven, Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN, USA

James D. Van de Ven is an assistant professor and McKnight Land-Grant professor at the University of Minnesota in the Department of Mechanical Engineering where he operates the Mechanical Energy and Power Systems (MEPS) Laboratory. Professor Van de Ven received his PhD in Mechanical Engineering from the University of Minnesota in 2006. From 2007 to 2011, he was an assistant professor in the Mechanical Engineering Department at Worcester Polytechnic Institute. Prior to joining WPI, Dr Van de Ven was a Post-Doctoral Research Associate at the University of Minnesota in the NSF sponsored Engineering Research Center for Compact and Efficient Fluid Power. Dr Van de Ven’s research interests are in efficient energy conversion, energy storage, fluid power, kinematics, and machine design.

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Published

2016-08-01

How to Cite

Knutson, A. L., & Ven, J. D. V. de. (2016). Modelling and experimental validation of the displacement of a check valve in a hydraulic piston pump. International Journal of Fluid Power, 17(2), 114–124. https://doi.org/10.1080/14399776.2016.1160718

Issue

2016: Vol 17 Iss 2

Section

Original Article