Conference article

Experimental Investigation of a Displacement-controlled Hydrostatic Pump/Motor by Means of Rotating Valve Plate

Liselott Ericson
Department of Management and Engineering, Fluid and Mechatronic Systems, Linköping University, Linköping, Sweden

Samuel Kärnell
Department of Management and Engineering, Fluid and Mechatronic Systems, Linköping University, Linköping, Sweden

Martin Hochwallner
Department of Management and Engineering, Fluid and Mechatronic Systems, Linköping University, Linköping, Sweden

Download articlehttp://dx.doi.org/10.3384/ecp1714419

Published in: Proceedings of 15:th Scandinavian International Conference on Fluid Power, June 7-9, 2017, Linköping, Sweden

Linköping Electronic Conference Proceedings 144:2, p. 19-27

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Published: 2017-12-20

ISBN: 978-91-7685-369-6

ISSN: 1650-3686 (print), 1650-3740 (online)

Abstract

Interest in the control of variable fluid power pumps/motors has increased in recent years. The actuators used are inefficient and expensive and this reduces the variable units’ usability. This paper introduces displacement control of pumps/motors by means of a rotating valve plate. By changing the angle of the valve plate, the effective use of the stroke is changed. The rotating valve plate is experimentally verified by a modified in-line pump. In the prototype, the valve plate is controlled with a worm gear connected to an electric motor. The results show potential for this kind of displacement control. However, the rotating valve plate creates pressure pulsations at part-displacement due to the commutation being performed at high piston speeds. If the piston speed and hence the flow from each piston is low, the pressure pulsation is acceptable.

Keywords

Fluid power pump/motor, displacement actuator

References

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