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

• Autorzy: Zawistowski Tomasz , Kleiber Michał

Identyfikatory

DOI

10.24423/cames.246

• Języki publikacji: EN

Abstrakty

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.

Słowa kluczowe

EN

hydrostatic machine; axial multi-piston pump; dynamic phenomena

PL

maszyna hydrostatyczna; pompa wielotłoczkowa osiowa; zjawisko dynamiczne

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Computer Assisted Methods in Engineering and Science
• Rocznik: 2018
• Tom: Vol. 25, no. 2-3
• Strony: 89--120
• Opis fizyczny: Bibliogr. 12 poz., rys., tab., wykr.

Twórcy

autor

Zawistowski Tomasz

• Creotech Instruments S.A.Okulickiego 7/9, 05-500 Piaseczno, Poland

autor

Kleiber Michał

• nstitute of Fundamental Technological ResearchPolish Academy of SciencesPawińskiego 5b, 02-106 Warsaw, Poland

Bibliografia

• [1] ANSYS Fluent Theory Guide, Release 15.0. November, 2013.
• [2] A. Osiecki. Hydrostatic Machine Drive[in Polish: Hydrostatyczny Napęd Maszyn]. Wydawnictwa Naukowo-Techniczne, Warszawa, Poland, 2004.
• [3] A. Osiecki.Drive and Hydraulic Control of Machines – Theory, Calculation and Systems[in Polish: Napęd i Sterowanie Hydrauliczne Maszyn – Teoria, obliczanie i układy]. Politechnika Gdanska, Gdańsk, Poland, 1995.
• [4] A. Osiecki.Piston Pump with a Constant Working Volume. International Patent PL191366 (A1. 07 31), 1978.
• [5] A. Osiecki, L. Osiecki. Hydrostatic Axial Piston Machine. International Patent EP0742870A1. 04 14, 1999.
• [6] L. Osiecki.Mechanisms of the Timing of Hydraulic Axial Multi-Piston Machines[in Polish: Mechanizmy Rozrządu Hydraulicznych Maszyn Wielotłoczkowych Osiowych]. Politechnika Gdanska, Gdańsk, 2006.
• [7] L. Osiecki.Multipiston Axial Hydrostatic Machine. International Patent PL387933A1. 08 11, 2010.
• [8] L. Osiecki.Multipiston Axial Hydrostatic Machine. International Patent PL215652B1. 01 31, 2014.
• [9] L. Osiecki, P. Patrosz, T. Zawistowski, B. Landvogt, J. Piechna, B. Zylinski. Compensation of pressure peaks in PWK-type hydraulic pumps. Key Engineering Materials, 490: 33–44, 2011.
• [10] P. Patrosz. Compensation of pressure peaks in a variable displacement piston pump with cam driven commutation[in Polish: Kompensacja skoków ciśnienia w pompie tłoczkowej o zmiennej wydajności z rozrządem krzywkowym].D.Sc. Thesis, 2017.
• [11] T. Zawistowski, M. Kleiber. Gap flow simulation methods in high pressure variable displacement piston pumps. Archives of Computational Methods in Engineering, 24: 519–542, 2017.
• [12] S.K. Maity, R. Kawalla. Ultrahigh Strength Steel: Development of Mechanical Properties Through Controlled Cooling, http://cdn.intechweb.org/.