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Movement of the swash plate in variable in-line pumps at decreased displacement setting angle
Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, The Institute of Technology.
2013 (English)Conference paper (Refereed)
Abstract [en]

Emitted noise is one of the biggest drawbacks of using fluid power systems. By using variable pump/motor unitsthe fluid power system architecture is more flexible and efficiency is drastically improved. However, the noise level atfragment displacement angles is not proportional to the power output. The noise level is rather increased with decreasedsetting angle. Studies by other researchers show increased flow pulsation at small displacement due to the controller’sdynamic response.In this paper a simulation model to understand the pump/motor behaviour at variable displacement angles is presented.The model includes the important forces created due to pressure built up in the pump and acting on the swash plate. Thecontrol valve and actuator are modelled to enable investigations of the oscillations on the swash-plate. The open loopsystem is compared to the closed loop system, where internal forces from the pistons on the swash plate and pressureexcitation are fed back by the controller.The pulsating pressure in the control actuator has no major impact on the flow and force pulsations. The swash plateoscillations due to the internal piston forces, however, are significant and will affect the outlet flow pulsations. Thepulsation is significant but will not have a major impact on valve plate designs for conventional pumps and motors.

Place, publisher, year, edition, pages
, International Congress of Mechanical Engineering, ISSN 2176-5480 ; 22
Keyword [en]
Fluid power pump, in-line, swash plate, noise, flow pulsation
National Category
Other Mechanical Engineering
URN: urn:nbn:se:liu:diva-106504OAI: diva2:716463
22nd International Congress of Mechanical Engineering (COBEM 2013), November 3-7, 2013, Ribeirão Preto, SP, Brazil
Available from: 2014-05-09 Created: 2014-05-09 Last updated: 2015-02-16

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Ericson, Liselott
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