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1

Simulation of dynamic phenomena in a high pressure variable displacement axial piston hydraulic pump

Zawistowski Tomasz, Kleiber Michał

Computer Assisted Methods in Engineering and Science

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2018

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Vol. 25, no. 2-3

89--120

EN

Substituting a valve plate-based commutation unit with a hydrostatic-load-free commutation bushingcontrollable with a signal of negligible power, that could be applied in constant and variable displacementpumps introduced a different approach to the design of commutation units in multi-piston axial hydraulicpumps.Conducted research showed that valve plate-based commutator is responsible for over 50% energy loss.The new idea assumed a stationary cylinder block and the replacement of the valve plate with a cam-driven commutation unit that would be totally unloaded hydrostatically. That eliminated main source ofmechanical losses as well as a flow resistance loss. Additionally, the dead volume was significantly reduced,which helped to reduce the pump noise level and resulted in a great decrease in power needed to controlthe pump displacement. That allowed to eliminate a servomechanism and the direct control of the pumpdisplacement with a low power element. However, the new design presented a challenge in the form ofpressure peaks occurring in the working chamber, which were difficult to eliminate. This article presentsattempts to solve problems connected with those dynamic phenomena.

2

Badania i modelowanie pompy wielotłoczkowej

Michałowski S., Stolarski B., Dziechciowski Z., Czerwiński A.

Zeszyty Naukowe Politechniki Świętokrzyskiej. Nauki Techniczne

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2009

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Z. 12

CD-CD

PL

W publikacji zajęto się problematyką modelowania pracy pompy wielotłoczkowej osiowej. W pracy wykonano model matematyczny pompy oraz przeprowadzono obliczenia symulacyjne. Przedstawiono także porównanie wyników symulacji cyfrowej i badań doświadczalnych.

EN

This paper presents the modelling problems of an axial miilti - piston pump. In this work was made a mathematical model of the pump and was realized computer calculations. In this article the comparing of simulation results and experimental research were presented too.

3

Badania i modelowanie pompy wielotłoczkowej osiowej

Michałowski S., Stolarski B., Dziechciowski Z., Czerwiński A.

Problemy Maszyn Roboczych

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2008

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Z. 32

47--56

PL

W publikacji zajęto się problematyką modelowania pracy pompy wielotłoczkowej osiowej. W pracy wykonano model matematyczny pompy oraz przeprowadzono obliczenia symulacyjne. Przedstawiono także porównanie wyników symulacji cyfrowej i badań doświadczalnych.

EN

This paper presents the modelling problems of an axial multi - piston pump. In this work a mathematical model of the pump was made and computer calculations were per- formed. The comparison of simulation results and experimental research are presented too.