EXPERIMENTAL INVESTIGATION OF FRICTION FORCE BETWEEN VANE TIP AND CAM-RING IN OIL VANE PUMPS

Authors

  • Mohamed El Ashmawy Suez Canal University, Engineering Science Department, Faculty of Petroleum and Mining Engineering, Suez, Egypt
  • Hubertus Murrenhoff RWTH Aachen University, Institute for Fluid Power Drives and Controls, Steinbachstr. 53, 52074 Aachen, Germany

Keywords:

vane pump, friction, PVD, hydraulic, power steering, coating

Abstract

An experimental investigation was conducted to measure the friction forces between a vane tip and cam-ring in oil vane pumps. The incentive of this work is to study the effect of important parameters on the friction coefficient between a vane tip and cam-ring. Such parameters are relative speed between the vane tip and cam-ring, normal vane force, pressure difference between the two sides of the vane, and coating of the vane tip. A comparison was performed between five different (Physical Vapor Deposition) PVD-coated vane tips and the normal vane without coating. To satisfy such requirements a special test rig was designed and constructed in the lab. The results show that the effect of the vane force and the pressure difference between the two sides of the vane are very small compared to the relative speed. The coating material shows no significant effect on the friction force in vane pumps. Therefore the wear properties of the coating materials should be considered in future studies. For friction measurements in oil vane pumps a simple test rig design with no pressure difference between the two sides of the vane is proposed.

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Author Biographies

Mohamed El Ashmawy, Suez Canal University, Engineering Science Department, Faculty of Petroleum and Mining Engineering, Suez, Egypt

Mohamed El Ashmawy Born in Cairo, Egypt in 1969. He acquired his Master’s degree in Mechanical Engineering in 2001, at Mansoura University, Egypt, with a thesis title: Improvements in BWR Cores Using Intra-Fuel-Bundle Jet Pumps. From 2006 to 2008, he was a scholarship holder as a Ph.D. student at the Institute for Fluid Power Drives and Controls (IFAS) at RWTH Aachen University, Germany. Now he is a teaching assistant at Engineering Science Department, Faculty of Petroleum and Mining Engineering, Suez Canal University, Egypt.

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

Hubertus Murrenhoff Born 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.

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Published

2009-11-01

How to Cite

Ashmawy, M. E., & Murrenhoff, H. (2009). EXPERIMENTAL INVESTIGATION OF FRICTION FORCE BETWEEN VANE TIP AND CAM-RING IN OIL VANE PUMPS. International Journal of Fluid Power, 10(1), 37–46. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/506

Issue

2009: Vol 10 Iss 1

Section

Original Article