PRESSURE OSCILLATIONS IN TRANSIENT PROCESSES OF HYDRAULIC SYSTEMS WITH VARIABLE DISPLACEMENT PUMPS

Authors

  • Hennadii Zaionchkovskyi National Aviation University, Kyiv, Ukraine
  • Volodymur Butko National Aviation University, Kyiv, Ukraine
  • Taras Tarasenko National Aviation University, Kyiv, Ukraine

DOI:

https://doi.org/10.18372/2306-1472.65.9854

Keywords:

aircraft, cavitation, hydraulic system, pressure oscillations, pressure pipeline, pump delivery, variable displacement pump, working fluid

Abstract

In aviation hydraulic drive of high power as a power supply the axial-piston variable displacement pumps became wide spreaded. The pump operational modes with air isolation and cavitation are accompanied by increased noise, delivery reduction and intensive pressure oscillations. The negative results of such phenomena are hydraulic elements erosion, pipeline fatigue failure, working fluid viscosity reduction and its contamination by wear products. The mechanism of cavitation rising in axial-piston pumps is considered, and factors which influence the cavitation rising and working fluid aeration are specified. The features of transient processes in aircraft hydraulic systems with variable displacement pumps are considered. It has been showed that as the pump delivery changes from its minimum to maximum great pressure oscillations in the aircraft pressure pipeline of the hydraulic system takes place, and have a negative influence on the pump service life. The recommendations concerning such pressure oscillation reduction are given.

Author Biographies

Hennadii Zaionchkovskyi, National Aviation University, Kyiv, Ukraine

Zaionchkovskyi Hennadii (1943). Doctor of Engineering. Professor.
Head of Department of Hydraulic-Gas Systems, National Aviation University, Kyiv, Ukraine.
President of international association “Industrial Hydraulics and Pneumatics”.
Education: Kyiv Institute of Civil Aviation Engineers, Kyiv, Ukraine (1967).
Research area: aviation hydraulic, hydraulic and pneumatic automation systems.

Volodymur Butko, National Aviation University, Kyiv, Ukraine

Butko Volodymyr (1937). Ph.D of engineering. Associate professor.
Laureate of High School Education.
Member of society of Automotive Engineering.
Education: Czech Technical University in Prague, CR (1959).
Research area: Dynamics and Control of Hydro- Pneumatic Systems, Hydraulics and Pneumatics.

Taras Tarasenko, National Aviation University, Kyiv, Ukraine

Tarasenko Taras (1978). Ph.D of engineering. Associate professor.
Education: Kyiv International University of Civil aviation (2001).

References

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Published

01-02-2016

How to Cite

Zaionchkovskyi, H., Butko, V., & Tarasenko, T. (2016). PRESSURE OSCILLATIONS IN TRANSIENT PROCESSES OF HYDRAULIC SYSTEMS WITH VARIABLE DISPLACEMENT PUMPS. Proceedings of National Aviation University, 65(4), 49–54. https://doi.org/10.18372/2306-1472.65.9854

Issue

Section

MODERN AVIATION AND SPACE TEHNOLOGY

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