STEADY STATE AND DYNAMIC CHARACTERISTICS OF WATER HYDRAULIC PROPORTIONAL CERAMIC SPOOL VALVE

Authors

  • Kari T. Koskinen Tampere University of Technology, Institute of Hydraulics and Automation, P.O. Box 589, FIN-33101 Tampere, Finland
  • Matti J. Vilenius Tampere University of Technology, Institute of Hydraulics and Automation, P.O. Box 589, FIN-33101 Tampere, Finland

Keywords:

proportional valves, water hydraulics, fluid power

Abstract

Water hydraulics is both old and new technology area. The first fluid power applications were using water as pres-sure medium already in 18th-century, but the modern water hydraulics has been rapidly growing just recently in 1980’s and 1990’s. The main reasons for the comeback are environmental and safety aspects. Water hydraulics offers a signifi-cant alternative to establish motion control systems in environments, where possible oil leakage can cause serious prob-lems.

One of the major tasks to solve in modern water hydraulics is to achieve more accurate control systems than today`s technology provides. The present water hydraulic control valves are not yet at the same technology level as that of oil hydraulics. This means that a lot of effort has to be put to develop better and more accurate valve constructions and on the other hand more intelligent control methods has to be developed to achieve reasonable valve characteristics. This paper concentrates on a study of water hydraulic proportional valves, which are still very new developments in water hydraulics. The steady state and dynamic charateristics of water hydraulic proportional ceramic spool valve is studied both by computer simulation and laboratory tests. Some constructional improvements for the valves are studied and also different control methods are discussed and proposed.

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Author Biographies

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

Koskinen Kari Tapio (Born 30th June 1962) is Professor of Fluid Power in Institute of Hydraulics and Automa-tion (IHA) in Tampere University of Technol-ogy (TUT) in Finland. He graduated as Dr.Tech in 1996. Since 1986 he has been acting in many kinds of R&D positions 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 J. Vilenius, Tampere University of Technology, Institute of Hydraulics and Automation, P.O. Box 589, FIN-33101 Tampere, Finland

Vilenius Matti Juhani (Born 25th March 1948) is Professor and Head of Institute of Hydraulics and Automation (IHA) in Tampere University of Technology (TUT) in Finland. He graduated as Dr.Tech in 1980. Since 1971 he has been acting in many kinds of R&D positions 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 published about 200 technical and scientific papers.

References

Koskinen, K. T., Vilenius, M., Hollingworth, B. 1996. The Characteristics of Two-Stage Water Hy-draulic Proportional Valves. 12. Aachener Fluidtechnisches Kolloquium, Aachen Germany, 12.-13.3. 1996. Aachen. pp. 115-132.

Koskinen, K. T., Uusi-Heikkilä, J. K. & Vilenius, M. J. 1996. Simulation and Control of Proportional Water Hydraulic Ceramic Spool Valve. 9th Bath In-ternational Fluid Power Workshop, Bath, England, 9-11.9. 1996, Preprints. Bath.

Koskinen, K. T. 1996. Proposals for Improving the Characteristics of Water Hydraulic Proportional Valves Using Simulation and Measurement. Disser-tation. Tampere University of Technology, Publica-tions, No 189.

Koskinen, K. T., Uusi-Heikkilä, J. K. & Vilenius, M. J. 1996. The Characteristics of Ceramic Spool Valve Piloted Water Hydraulic Proportional Valve. In: Nair, S. & Chandran, R. (ed). Fluid power sys-tems and technology 1996, Collected Papers. The ASME international mechanical engineering con-gress and exposition, November 17-22, 1996 Atlan-ta, Georgia. 3. New York, New York, USA. pp. 71-76.

Koskinen, K. T., Uusi-Heikkilä, J. & Vilenius, M. J. 1997. Improving the Characteristics of Water Hy-draulic Proportional Valves. The Fifth Scandinavian International Conference on Fluid Power, SICFP 97, Linköping, Sweden, 28-30 May 1997. pp. 277-290.

Koskinen, K. T. & Vilenius, M. J. 1994. Water as a pressure medium in fluid power systems. IFAC Workshop on Trends in Hydraulic and Pneumatic Components and Systems, Chicago II, 8-9 Novem-ber 1994. 13 s.

Trostman E. 1996. Water hydraulics control technolo-gy. Marcel Dekker, New York.

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Published

2000-03-01

How to Cite

Koskinen, K. T., & Vilenius, M. J. (2000). STEADY STATE AND DYNAMIC CHARACTERISTICS OF WATER HYDRAULIC PROPORTIONAL CERAMIC SPOOL VALVE. International Journal of Fluid Power, 1(1), 5–15. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/653

Issue

2000: Vol 01 Iss 1

Section

Original Article