Vane Geometry Effect on Lubrication Conditions between Vane Tip and Cam-Ring in Hydraulic Vane Machines
International Journal of Mechanical Engineering and Applications
Volume 3, Issue 1-2, January 2015, Pages: 1-10
Received: Nov. 15, 2014;
Accepted: Nov. 19, 2014;
Published: Nov. 24, 2014
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Mohamed Elashmawy, Mechanical Engineering Department, Engineering College, University of Hail, Hail, Saudi Arabia; Engineering Science Department, Faculty of Petroleum and Mining Engineering, Suez University, Suez, Egypt
Abdulaziz Alghamdi, Mechanical Engineering Department, Engineering College, University of Hail, Hail, Saudi Arabia
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Vane geometry is an important parameter affecting the lubrication conditions of hydraulic vane machines. A simple thermo-elasto-hydrodynamic lubrication (TEHL) model was used to calculate the friction between vane tip and cam-ring of the hydraulic vane machines. Effect of vane geometry and its dimensions on hydraulic vane machines was theoretically investigated. Navier-Stokes and energy equations were numerically solved using finite difference technique. Viscosity and density distributions were considered in the TEHL-model. Results show that vane geometry optimization is quite important to enhance lubrication conditions of hydraulic vane machines. The study shows that the straight vane geometry is the best choice for high pressure applications. At higher values, increasing of vane tip radius of curvature and vane thickness enhances lubrication conditions between vane tip and cam-ring. Vane tip radius of curvature and vane thickness should not be less than 2 mm and 1.5 mm respectively.
Vane Geometry, Friction Coefficient, TEHL-Model, Vane Tip Radius, Vane Thickness
To cite this article
Vane Geometry Effect on Lubrication Conditions between Vane Tip and Cam-Ring in Hydraulic Vane Machines, International Journal of Mechanical Engineering and Applications. Special Issue: Advanced Fluid Power Sciences and Technology.
Vol. 3, No. 1-2,
2015, pp. 1-10.
Mohamed Elashmawy. Theoretical Investigation of Friction Forces between Vane Tip and Cam-Ring in Oil Vane Pumps. International Journal of Science, Technology and Society. Vol. 2, No. 5, 2014, pp. 121-128. doi: 10.11648/j.ijsts.20140205.15
M. Elashmawy. Study of Vane Tip Friction in Oil Vane pump. Suez Canal University Dissertation. Egypt, 2009.
Y. Inaguma. Oil temperature influence on friction torque characteristics in hydraulic pumps. Proc IMechE Part C: J Mechanical Engineering Science 226(9); pp. 2267-2280, 2011.
Y. Inaguma and N. Yoshida. Mathematical Analysis of Influence of Oil Temperature on Efficiencies in Hydraulic Pumps for Automatic Transmissions. SAE Int. J. Passeng. Cars - Mech. Syst. 6(2):786-797, doi:10.4271/2013-01-0820, 2013.
P. C. Sui. Prediction of film thickness and friction at a rotary pump blade and liner interface. American Society of Mechanical Engineering (ASME). Vol. 72, ASME, New York, pp.115-122, 1995.
Y. Inaguma, and A. Hibi. Reduction of friction torque in vane pump by smoothing cam ring surface. Proceedings of the Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Science. 221 (5), pp. 527-534, 2007.
M. Elashmawy, and H. Murrenhoff. Experimental Investigation of friction force between vane tip and cam-ring in oil vane pumps. International Journal of Fluid Power. Vol. 10, No. 1, pp 37-46, 2009.
M. Panek. Vane pump control in order to maintain liquid friction and leak tightness. International Capathian Conference ICCC. Zakopane, Poland, 2004.
Y. Inaguma, and N. Yoshida. Variation in Driving Torque and Vane Friction Torque in a Balanced Vane Pump. SAE Technical Paper, 2014-01-1764, 2014.
P. W. Gold. Tribology. Umdruck zur Vorlesung. Trans-Aix-Press, Aachen, Germany, 2003.
J. Blume, “Druck und Temberatureinfluß auf Viscosität und Kompressibilität von flüssigen Schmierstoffen,” RWTH Aachen University Dissertation, 1987