WEAR AND FRICTION OF ZRCG-COATED PISTONS OF AXIAL PISTON PUMPS

Authors

  • Hubertus Murrenhoff RWTH-Aachen University, Institute for Fluid Power Drives and Controls Steinbachstr. 53, 52074 Aachen, Germany
  • Stephan Scharf RWTH-Aachen University, Institute for Fluid Power Drives and Controls Steinbachstr. 53, 52074 Aachen, Germany

Keywords:

carbon, coatings, PVD, hydrostatic displacement unit, wear, friction

Abstract

Within the Collaborative Research Center 442 “Environmental friendly tribological systems“ components of different tribological systems are applied with PVD-coatings to realize the performance of these systems with biologically fast degradable fluids without increased friction and wear. With the usage of biologically fast degradable fluids without environmentally toxic additives some essential functions, that had been given by the former fluid, have to be substituted, what is realized by the provision of sliding parts with coatings. By that way wear and friction are decreased significantly. In this paper it is shown, that coated pistons of an axial piston machine reveal limited wear within the first hours of operation and very low friction between piston and bushing. The experiments are made on an one piston test bench.

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Author Biographies

Hubertus Murrenhoff, RWTH-Aachen University, Institute for Fluid Power Drives and Controls Steinbachstr. 53, 52074 Aachen, Germany

Hubertus Murrenhoff Born in August 13th, 1953 he is Director of the Institute for Fluid Power Drives and Controls (IFAS) at RWTH Aachen University, Germany. Main research interests cover hydraulics and pneumatics including components, systems, controls, simulation programs and the applications of fluid power in mobile and stationary equipment.

Stephan Scharf, RWTH-Aachen University, Institute for Fluid Power Drives and Controls Steinbachstr. 53, 52074 Aachen, Germany

Stephan Scharf Was born in Aachen, Germany in 1974. He received his degree in mechanical engineering (Dipl.-Ing.) at RWTH Aachen University, Germany in 2001. Since 2002 he has been member of the scientific staff at the Institute for Fluid Power Drives and Controls (IFAS) at RWTH Aachen University and works toward his Phd (Dr.-Ing.).

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Published

2006-11-01

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Original Article

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