NUMERICAL AND EXPERIMENTAL STUDY OF HYDROSTATIC DISPLACEMENT MACHINE

Authors

  • Rasmus Soerensen Liftra & Aalborg University, Department of Mechanical and Manufacturing Engineering. Karlskogavej 12, 9220 Aalborg SV, Denmark
  • Michael Hansen University of Agder, Department of Engineering. Torvasen 11, 4886 Grimstad, Norway
  • Ole Mouritsen Aalborg University, Department of Mechanical and Manufacturing Engineering. Fibigerstraede 16, 9220 Aalborg East, Denmark

Keywords:

hydrostatic motor, fluid structure interaction, leakage flow, experimental verification.

Abstract

This paper presents a simulation tool to determine the structural deflections and corresponding leakage flow in a hydrostatic displacement motor. The simulation tool is applied to a new motor principle that is categorized as an extreme low speed high torque motor with dimensions that calls for attention to the volumetric efficiency. To counteract structural deflections the motor is equipped with compensation pressure volumes that may be used to limit the leakage flow across the end faces of the circular rotor. This leakage flow is investigated by solving Reynolds equation for the pressure distribution across both end faces. The fluid pressure is combined with structural calculations in a fluid structural interaction simulation which evaluates the influence of structural deflections on the gaps and the leakage flow. The numerical work is validated by prototype tests. Both deflections and leakage flows are measured and compared with those from the simulations with good correlation. The deflections, and hence leakage flow, are reduced by the use of compensation pressure volumes, which is validated both numerically and experimentally.

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Author Biographies

Rasmus Soerensen, Liftra & Aalborg University, Department of Mechanical and Manufacturing Engineering. Karlskogavej 12, 9220 Aalborg SV, Denmark

Rasmus Moerk Soerensen Rasmus Moerk Soerensen graduated as a M.Sc. in mechanical engineering from Aalborg University in 2008. He is employed at Liftra as an industrial PhD. The PhD project is in collaboration between Liftra and Department of Mechanical and Manufacturing Engineering at Aalborg University. His research area is related to modelling of a hydrostatic motor and prototype testing.

Michael Hansen, University of Agder, Department of Engineering. Torvasen 11, 4886 Grimstad, Norway

Michael Hansen Since 2009 the author is Professor in Fluid Power at the Department of Engineering at the University of Agder and also a part-time research engineer at Aker Solutions AS. His primary interests are hydraulic and mechanical machine dynamics. He has an M.Sc in mechanical engineering from Aalborg University and a Ph.D. in computer based simulation and design of mechanical mechanisms.

Ole Mouritsen, Aalborg University, Department of Mechanical and Manufacturing Engineering. Fibigerstraede 16, 9220 Aalborg East, Denmark

Ole O. Mouritsen Ole O. Mouritsen received his M.Sc. from the Technical University of Denmark, 1970. He is employed as Associate Professor at Aalborg University, Department of Mechanical and Manufacturing Engineering since 1985. He previously worked at the Danish Engineering Academy, Odense Steel Shipyard Ltd. and The Danish Welding Institute (FORCE). His research interests include machine elements, FEM calculations, fatigue and fracture mechanics.

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Published

2018-12-30

How to Cite

Soerensen, R., Hansen, M., & Mouritsen, O. (2018). NUMERICAL AND EXPERIMENTAL STUDY OF HYDROSTATIC DISPLACEMENT MACHINE. International Journal of Fluid Power, 13(2), 29–40. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/235

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Original Article