The basics of design and experimental tests of the commutation unit of a hydraulic satellite motor

• Autorzy: Sliwinski P.

Identyfikatory

DOI

10.1016/j.acme.2016.04.003

• Języki publikacji: EN

Abstrakty

EN

The article presents an analytical method to design the commutation unit in a hydraulic satellite motor. It is shown that the size of the holes feeding the working chambers and their location on the plates closing those chambers depends on the geometrical dimensions of the working mechanism. The overlap in the commutation unit depends on the rotational speed range. It is demonstrated that the geometrical dimensions of the commutation unit clearances change as a function of the angle of machine shaft rotation. The flow in these clearances is described as Q = f(Δpγ). It has been observed that during the transition from the cycle of filling to the cycle of emptying the working chamber, the pressure in the motor's working chamber changes linearly as a function of the shaft rotation angle which has a significant effect on leakage in the commutation unit clearances. The methodology of investigating the commutation unit in a satellite motor and the mathematical model of leakage in the commutation unit clearance described in the article may be successfully adopted to research the commutation unit in positive displacement machines of another type.

Słowa kluczowe

EN

commutation unit design; flow in commutation unit clearances; commutation unit in a motor; satellite motor

PL

silnik hydrauliczny; hydraulika; pneumatyka

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2016
• Tom: Vol. 16, no. 4
• Strony: 634--644
• Opis fizyczny: Bibliogr. 20 poz., rys., tab., wykr.

Twórcy

autor

Sliwinski P.

• Faculty of Mechanical Engineering, Gdansk University of Technology, Narutowicza 11/12 Str., 80-233 Gdansk, Poland

Bibliografia

• [1] A. Balawender, P. Sliwinski, et al., Developmental research of hydraulic satellite motors and satellite pump with small geometrical displacement supplied with water, emulsion and oil (in Polish). Report of research project No. R0300103, Gdansk University of Technology, 2010.
• [2] A. Balawender, Physical and mathematical model of losses in hydraulic motors. Developments in mechanical engineering, Gdansk University of Technology Publishers, Gdansk, 2005.
• [3] S. Bednarczyk, J. Stryczek, Development of gerotor pumps (in Polish), Hydraulika i Pneumatyka 1 (2000).
• [4] A. Ellman, R. Piche, A two regime orifice flow formula for numerical simulation, Journal of Dynamic Systems, Measurement and Control 121 (1999) 721.
• [5] M. Jelali, A. Kroll, Hydraulic Servo-systems: Modelling, Identification and Control, Springer-Verlag, London Berlin Heidelberg, 2004.
• [6] L. Osiecki, Commutation Units of Hydraulic Axial Piston Machines, Gdansk University of Technology Publishers, Gdansk, 2006.
• [7] P. Osinski, A. Deptuła, M.A. Partyka, Discrete optimization of a gear pump after tooth root undercutting by means of multi-valued logic trees, Archives of Civil and Mechanical Engineering 13 (2013).
• [8] P. Patrosz, PhD thesis (in progress): Compensation of pressure peaks in piston pump with cam driven commutation unit. Gdansk University of Technology.
• [9] J. Stryczek, S. Bednarczyk, K. Biernacki, Gerotor pump with POM gears: design, production technology, research, Archives of Civil and Mechanical Engineering 14 (2014).
• [10] J. Stryczek, Gears of the Hydraulic Machines (in Polish), Publishing House of Wroclaw University of Technology, Wroclaw, 2007.
• [11] P. Sliwinski, The flow of liquid in flat gaps of satellite motors working mechanism, Polish Maritime Research 2 (2014).
• [12] P. Sliwinski, P. Patrosz, Diagnostics of commutation unit in satellite pumps and motors, Hydraulika a Pneumatika 1–2 (2013).
• [13] P. Sliwinski, R&D of satellite pumps and motors with small geometrical displacement supplied with oil and non-flammable liquids. Developments in Mechanical Engineering No. 5/2012, Gdansk University of Technology Publishers, Gdansk, 2012.
• [14] P. Sliwinski, Researches on compensation and valve plate in SM satellite pumps and motors type (in Polish), Hydraulika i Pneumatyka (5) (2010).
• [15] P. Sliwinski, Losses and power balance in hydraulic satellite motor supplied with oil and HFA-E emulsion, Hydraulika a Pneumatika 1–2 (2009).
• [16] E.N. Viall, Qin Zhang: Spool Valve Discharge Coefficient Determination, in: Proceedings of the 48th National Conference on Fluid Power, April 4-6, Chicago, Illinois, USA, 2000.
• [17] D. Wu, R. Burton, G. Schoenau, D. Bitner, Modeling of orifice flow rate at very small openings, International Journal of Fluid Power 4 (1) (2003).
• [18] D. Wu, R. Burton, G. Schoenau, An empirical discharge coefficient model for orifice flow, International Journal of Fluid Power 3 (3) (2002).
• [19] T. Zloto, D. Sochacki, P. Stryjewski, Analysis of oil leaks in a variable-height gap between the cylinder bloc and the valve plate in a piston pump by means of author-designed software and CFD fluent, TEKA Commission of Motorization and Energetics in Agriculture 14 (4) (2014).
• [20] Danfoss product catalog. http://products.danfoss.com/ power-solutions/.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę