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COMPARISON OF THE POWERS OF ENERGY LOSSES IN A VARIABLE CAPACITY DISPLACEMENT PUMP DETERMINED WITHOUT OR WITH TAKING INTO ACCOUNT THE POWER OF HYDRAULIC OIL COMPRESSION

Abstract

Powers of energy losses in a variable capacity displacement pump are compared with or without taking into account the power of hydraulic oil compression. Evaluation of power of liquid compression in the pump was made possible by the use of method, proposed by the Author, of determining the degree of liquid aeration in the pump . In the method of determining the liquid aeration in the pump and of powers of volumetric losses of liquid compression a simplified formula (qPvc × ΔpPi)/2 was used describing the field of indicated work of volumetric losses qPvc of liquid compression during one shaft revolution at indicated increase ΔpPi of pressure in the chambers. Three methods were used for comparing the sum of powers of volumetric losses ΔPPvl due to leakage and ΔPPvc of compression and also of mechanical losses resulting from increase ΔpPi of indicated pressure in the working chambers.

Keywords:

hydrostatic drive, variable capacity displacement pump, volumetric losses of hydraulic oil compression

Details

Issue
Vol. 22 No. 2(86) (2015)
Section
Latest Articles
Published
10-07-2015
DOI:
https://doi.org/10.1515/pomr-2015-0015
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.

 

Authors

Zygmunt Paszota

Gdańsk University of Technology

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