EFFECT OF CAVITATION IN WATER HYDRAULIC POPPET VALVES

Authors

  • Shigeru Oshima Numazu College of Technology, Control and Computer Engineering department, 3600 Ooka, Numazu, Shizuoka 410-8501, Japan
  • Timo Leino Tampere University of Technology, Institute of Hydraulics and Automation, P.O. Box 589, 33101Tampere, Finland
  • Matti Linjama Tampere University of Technology, Institute of Hydraulics and Automation, P.O. Box 589, 33101Tampere, Finland
  • Kari Tapio Koskinen Tampere University of Technology, Institute of Hydraulics and Automation, P.O. Box 589, 33101Tampere, Finland
  • Matti Juhani Vilenius Tampere University of Technology, Institute of Hydraulics and Automation, P.O. Box 589, 33101Tampere, Finland

Keywords:

hydraulics, water, cavitation, poppet valve, shape of valve seat, half cut model, experimental study

Abstract

In this paper, cavitation in water hydraulic poppet valves is investigated by an experimental method with a half cut test model. The situation of cavitation appearance, the effects of cavitation on the characteristics of flow rate, noise lev-el, pressure distributions and the boundary of inception of the cavitation are investigated. Comparison between a poppet valve with sharp edged seat and another, which has a length on the seat, is made. The effects of change in the shape of the seat are discussed as well as the effect of cavitation appearance. As a result, it is revealed that the sharp edged seat valve is less influenced by the cavitation on its characteristics.

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Author Biographies

Shigeru Oshima, Numazu College of Technology, Control and Computer Engineering department, 3600 Ooka, Numazu, Shizuoka 410-8501, Japan

Shigeru Oshima (Born 8th July 1949) is Professor of Con-trol and Computer Engineering department in Numazu College of Technology in Japan. He received DR. Eng. from Tokyo Institute of Technology in 1986. He pub-lished about 30 articles dealing with oil hydraulic valve, orifice and motor. Since 1997 he has been acting as a member of Water Hydraulic Research Committee in JHPS. He has worked as a visiting re-searcher at IHA in Tampere University of Technology in Finland for 6 months in 2000.

Timo Leino, Tampere University of Technology, Institute of Hydraulics and Automation, P.O. Box 589, 33101Tampere, Finland

Leino Timo Johannes was born in Uusikaupunki, Finland in 1973. He received the MSc degree in November 1999 from the Tampere Univer-sity of Technology (TUT). He works cur-rently as a researcher at Institute of Hy-draulics and Automation (IHA), TUT. His current main research area is Low Pressure Water Hydraulics.

Matti Linjama, Tampere University of Technology, Institute of Hydraulics and Automation, P.O. Box 589, 33101Tampere, Finland

Linjama Matti was born in Kivijärvi, Finland in 1971. He received the MSc degree in 1995, Licenti-ate of Technology degree in 1996 and Doctor of Technology degree in 1998 all from the Tampere University of Technolo-gy and in machine automation. He works currently as a senior researeher at Institute of Hydraulics and automation, Tampere University of technology. His current research is in simulation and motion con-trol of low-pressure water hydraulic sys-tems.

Kari Tapio Koskinen, Tampere University of Technology, Institute of Hydraulics and Automation, P.O. Box 589, 33101Tampere, Finland

Koskinen Kari Tapio (Born 30th June 1962) is Professor of Fluid Power in Institute of Hydraulics and Au-tomation (IHA) in Tampere University of Technology (TUT) in Finland. He graduat-ed as Dr.Tech in 1996. Since 1986 he has been acting in many kinds of R&D posi-tions inside and outside TUT. Since 1998 he has been the leader of Water Hydraulics Research Group in IHA. He has published about 70 technical and scientific papers.

Matti Juhani Vilenius, Tampere University of Technology, Institute of Hydraulics and Automation, P.O. Box 589, 33101Tampere, Finland

Vilenius Matti Juhani (Born 25th March 1948) is Professor and Head of Institute of Hydraulics and Auto-mation (IHA) in Tampere University of Technology (TUT) in Finland. He graduat-ed as Dr.Tech in 1980. Since 1971 he has been acting in many kinds of R&D posi-tions inside and outside TUT. He has long experience as an academic level teacher and supervisor as well as an organizer of international conferences. He has pub-lished about 200 technical and scientific papers.

References

Backé W. 1999. Water- or Oil-Hydraulics in the Fu-ture. The 6th Scandinavian Int. Conf. On Fluid Power-SICFP ’99, Tampere, Finland, pp. 51-65.

Mauer J. 1995. Proportional, High Pressure Valves for Water Hydraulic System. The 4th Scandinavian Int. Conf. On Fluid Power-SICFP ’95, Tampere, Fin-land, pp. 898-909.

Oshima S. and Ichikawa T. 1985. Cavitation Phenom-ena and Performance of Oil Hydraulic Poppet Valve. 1st report, Mechanism of Generation of Cav-itation and Flow Performance, Bulletin of JSME, Vol.28, No.244, pp. 2264-2271.

Oshima S. and Ichikawa T. 1986. Cavitation Phenom-ena and Performance of Oil Hydraulic Poppet Valve. 3rd report, Influence of the Poppet Angle and Oil Temperature on the Flow Performance, Bulletin of JSME, Vol.29, No.249, pp. 743-750.

Oshima S. and Ichikawa T. 1986. Cavitation Phenom-ena and Performance of Oil Hydraulic Poppet Valve. 5th report, Influence of Dimensions of Valve on the Thrust Force Characteristics, Bulletin of JSME, Vol.29 No.251, pp. 1427-1433.

Varandili E. 1999. Properties of Tap Water as a Hy-draulic Pressure Medium. The 6th Scandinavian Int. Conf. On Fluid Power-SICFP ’99, Tampere, Fin-land, pp. 113-127.

Yamaguchi A., Kazama T. and Wang X. 2000. Ero-sion due to Impingement of a Cavitating Jet. Trans. of the JHPS, 31-7, pp. 177-182.

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Published

2001-11-01

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Original Article

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