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The source admittance method for pumps with complex outlet channels
Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems. Linköping University, The Institute of Technology.
Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems.
2007 (English)In: Proc. of the 10th Scandinavian International Conference on Fluid Power (SICFP'07), vol 1, Tampere: Tampere University of Technologi , 2007, 279-293 p.Conference paper, Published paper (Refereed)
Abstract [en]

The source admittance method offers a new way to measure flow ripple. Compared to earlier methods such as the two-microphone method, the main benefit is that there is no need for a model of the outlet channel - the source flow is measured through an additional pressure transducer inside the pump. This makes the source admittance method easier to use and less modelling skill is needed. Furthermore, the method is more reliable because the somce flow is measured, i.e. pressure at the creation spot, directly. In earlier studies, the method proved to work very well for pumps with simple discharge channels but less well for pumps with complex discharge channels.

The experimental test object is a pump with a simple outlet channel. Its internal impedance can easily be changed in a controlled manner; complexity can thus be added step by step. The paper contributes to the understanding of how complexity of the pump's discharge channel influences the usefulness of the source admittance method.

Place, publisher, year, edition, pages
Tampere: Tampere University of Technologi , 2007. 279-293 p.
Keyword [en]
Fluid power
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-40967Local ID: 54782ISBN: 978-952-15-1761-7 (print)OAI: oai:DiVA.org:liu-40967DiVA: diva2:261816
Conference
10th Scandinavian International Conference on Fluid Power (SICFP'07). Tampere, Finland, May 2007.
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2013-11-08
In thesis
1. Flow Pulsations in Fluid Power Machines - a Measurement and Simulation Study
Open this publication in new window or tab >>Flow Pulsations in Fluid Power Machines - a Measurement and Simulation Study
2008 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Stricter requirements for better working environment involve noise and vibration control of hydraulic machines. The operational conditions for hydraulic machines, such as pressure and rotational speed, are also increasing and this makes it even more difficult to develop a quiet, vibration-free machine due to the interdependence between noise and escalating operational conditions. The thesis investigates machines working in different driving modes and under different operational conditions.

A so-called cross-angle is proposed for motor as well as pump/motor applications with variable displacement angles. The cross-angle is intended to reduce the overall noise level in the machine's working area. Other noise reduction features are also considered for machines working in different modes.

To facilitate the system integrator's ability to design quiet systems, methods to determine the source flow and source impedance of the machine are essential. The source flow is assumed to be created at the valve plate and the internal impedance related to the high pressure port are completely independent of the rest of the system. Knowledge of these properties makes it possible to foresee the noise properties of a system already on the design phase. A novel source flow measurement method, the source admittance method, is investigated here. The method is considered to be robust and easy to use to suit industry requirements.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2008. 74 p.
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1355
Keyword
noise, pump, motor, measurement, optimisation
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-42325 (URN)62599 (Local ID)978-91-7393-938-6 (ISBN)62599 (Archive number)62599 (OAI)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2013-11-08

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Ericson, LiselottPalmberg, Jan-Ove

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