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Effect of the working liquid compressibility on the picture of volumetric and mechanical losses in a high pressure displacement pump used in a hydrostatic drive Part I Energy losses in a drive system, volumetric losses in a pump

Abstract

Working liquid compressibility may considerably change the values and proportions of coefficients of volumetric and mechanical energy losses in the displacement pump used in a hydrostatic drive system. This effect can be particularly seen in the operation under high pressure and also in the system, where aeration of the working liquid can occur. In the Part I a diagram is presented, proposed by the author, of power increase in a hydrostatic drive system (hydraulic motor, pump) opposite to the direction of power flow, replacing the Sankey diagram of power decrease in the direction of power flow. Mathematical model is presented of volumetric losses in the pump and its laboratory verification.

Keywords:

hydrostatic drive system, pressure displacement pump, energy losses, energy efficiency, energy saving, liquid compressibility, Sankey diagram

Details

Issue
Vol. 19 No. 2(73) (2012)
Section
Latest Articles
Published
20-07-2012
DOI:
https://doi.org/10.2478/v10012-012-0008-4
Licencja:
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Open Access License

This journal provides immediate open access to its content under the Creative Commons BY 4.0 license. Authors who publish with this journal retain all copyrights and agree to the terms of the CC BY 4.0 license.

 

Author Biography

Zygmunt Paszota,
Gdansk University of Technology, Faculty of Ocean Engineering and Ship Technology



Authors

Zygmunt Paszota

Gdansk University of Technology, Faculty of Ocean Engineering and Ship Technology

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