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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Authors
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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Abstract
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.
Keywords
Vane Geometry, Friction Coefficient, TEHL-Model, Vane Tip Radius, Vane Thickness
To cite this article
Mohamed Elashmawy, Abdulaziz Alghamdi, 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. doi: 10.11648/j.ijmea.s.2015030102.11
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