The power density of hydraulic drive trains make variable displacement machines appealing to a wide range of applications such as mobile hybrid systems, displacement controlled actuation of heavy machinery, and hydrostatic transmissions for wind power. Current state of the art variable displacement pumps suffer from poor efficiencies at low displacements, thus limiting the potential benefits of hydraulic solutions. Here, a variable displacement linkage pump is presented as a promising method for achieving high efficiency across the full displacement range. In this paper, the linkage kinematics and dynamics are discussed, an energy loss model is presented and used to drive design decisions of a first generation prototype, and experimental results are presented to validate the model. It will be shown that this linkage-based, variable, positive displacement architecture shows promise as a highly efficient alternative to other axial piston machines across a wide range of displacements.
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ASME/BATH 2013 Symposium on Fluid Power and Motion Control
October 6–9, 2013
Sarasota, Florida, USA
Conference Sponsors:
- Fluid Power Systems and Technology Division
ISBN:
978-0-7918-5608-6
PROCEEDINGS PAPER
Efficiency Modeling and Experimental Validation of a Variable Displacement Linkage Pump
Shawn Wilhelm,
Shawn Wilhelm
University of Minnesota, Minneapolis, MN
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James Van de Ven
James Van de Ven
University of Minnesota, Minneapolis, MN
Search for other works by this author on:
Shawn Wilhelm
University of Minnesota, Minneapolis, MN
James Van de Ven
University of Minnesota, Minneapolis, MN
Paper No:
FPMC2013-4428, V001T01A017; 10 pages
Published Online:
February 26, 2014
Citation
Wilhelm, S, & Van de Ven, J. "Efficiency Modeling and Experimental Validation of a Variable Displacement Linkage Pump." Proceedings of the ASME/BATH 2013 Symposium on Fluid Power and Motion Control. ASME/BATH 2013 Symposium on Fluid Power and Motion Control. Sarasota, Florida, USA. October 6–9, 2013. V001T01A017. ASME. https://doi.org/10.1115/FPMC2013-4428
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