MODEL DEVELOPMENT AND EXPERIMENTAL ANALYSIS OF A VIRTUALLY VARIABLE DISPLACEMENT PUMP SYSTEM

Authors

  • John Lumkes Jr Purdue University – Agricultural & Biological Engineering Dept. 225 South University Street, West Lafayette, IN 47907 USA
  • Mark A. Batdorff Purdue University – Agricultural & Biological Engineering Dept. 225 South University Street, West Lafayette, IN 47907 USA
  • John R. Mahrenholz Purdue University – Agricultural & Biological Engineering Dept. 225 South University Street, West Lafayette, IN 47907 USA

Keywords:

virtual variable displacement pump, lumped parameter model, verification, optimization

Abstract

This work presents the modelling and testing of a Virtually Variable Displacement Pump (VVDP). The system used a high speed on/off valve to modulate flow from a fixed displacement pump, directing the flow either to the tank or high pressure supply line of the hydraulic system. A lumped parameter model of the system was developed using sub-models to describe the dynamics of each component in the system. A test setup using currently available components was built to validate the overall system model and study the effects of switching frequency on system efficiency. Once verified, the model was used to simulate and further study the effects of changing the compressible fluid volume and line lengths. Simulation results show that reducing the line lengths and compressible volume improves the average VVDP system efficiency by 14 % over a range of switching frequencies and duty cycles while holding other system parameters constant.

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Author Biographies

John Lumkes Jr, Purdue University – Agricultural & Biological Engineering Dept. 225 South University Street, West Lafayette, IN 47907 USA

John H. Lumkes Jr. John received the B.S.E. degree from Calvin College in 1990, the M.S.E. from the University of Michigan-Ann Arbor in 1992, and the Ph.D. from the University of Wisconsin- Madison in 1997. From 1997-2004 he was an Assistant and Associate Professor at Milwaukee School of Engineering. In 2004 he joined Purdue University as an Assistant Professor and is active in digital hydraulics, modeling and controls, mechatronics, and advising senior design projects.

Mark A. Batdorff, Purdue University – Agricultural & Biological Engineering Dept. 225 South University Street, West Lafayette, IN 47907 USA

Mark A. Batdorff Mark received the B.S.M.E. degree from Milwaukee School of Engineering in 2004, the M.S.E. from the Purdue University in 2006, and is working towards his Ph.D. in the area of high speed electromagnetics applied to digital hydraulics at Purdue University.

John R. Mahrenholz, Purdue University – Agricultural & Biological Engineering Dept. 225 South University Street, West Lafayette, IN 47907 USA

John R. Mahrenholz John received his undergraduate and Masters degrees in Agricultural and Biological Engineering from Purdue University in 2007 and 2009, respectively. His research interests include dynamic systems analysis, controls, and fluid power systems and component design.

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Published

2009-11-01

How to Cite

Jr, J. L., Batdorff, M. A., & Mahrenholz, J. R. (2009). MODEL DEVELOPMENT AND EXPERIMENTAL ANALYSIS OF A VIRTUALLY VARIABLE DISPLACEMENT PUMP SYSTEM. International Journal of Fluid Power, 10(3), 17–27. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/492

Issue

2009: Vol 10 Iss 3

Section

Original Article