Project: Attenuation of pump flow pulsations by hydraulic RC filters
2010 (English)Report (Other academic)
The work has been performed at Johannes Kepler University of Linz at the Institute of Machine Design and Hydraulic Drives. A novel method is to create a RC-type hydraulic filter between the pump and load. R stand for resistor and C for capacitor which creates a passive electrical low-pass filter. In hydraulic terms, the capacity of the filter is the cavity of the pump's delivery channel and the resistive part is the orifice which connects the pump to the external system. This system may not minimise the overall hydraulic noise however the attenuator's goal is to minimise the pulsations at the load.In the project a simulation model have been developed in HOPSAN. The flow pulsation created in the radial piston pump is extensively modelled. Furthermore, the RC-filter including the external system is modelled. The simulation model has been verified with some pressure pulsation measurements.The simulations show a reduction of the pressure pulsations at the load. However, the pressure drop associated with the superimposed flow variation is much smaller than predicted by the steady-state orifice equation. Further investigations and measurements need to be done do increase the accuracy of the orifice equation.
Place, publisher, year, edition, pages
2010. , 25 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-63017OAI: oai:DiVA.org:liu-63017DiVA: diva2:375748