EHD Lubrication Characteristics of a New Type of Ground Cylindrical Worm Gearing

[+] Author and Article Information
V. Simon

University of Novi Sad, Bul. Cara Lazara 1, 21000 Novi Sad, Yugoslavia

J. Mech. Des 119(1), 101-107 (Mar 01, 1997) (7 pages) doi:10.1115/1.2828770 History: Received November 01, 1995; Revised August 01, 1996; Online January 18, 2008


A full thermal elastohydrodynamic analysis of lubrication of a new type of cylindrical worm gearing with concave worm profile, ground by a grinding wheel whose profile consists of two circular arcs, is presented. The EHD lubrication analysis is based on the simultaneous solution of the Reynolds, elasticity, energy, and Laplace’s equations. The oil viscosity variation with respect to pressure and temperature and the density variation with respect to pressure are included. The finite difference method and numerical integration have been used to get the solution of the highly nonlinear integrodifferential system of governing equations. By using a computer program, the influence of design and operating parameters of the new type of worm gearing on EHD lubrication characteristics has been investigated. Also, the comparison of the EHD load carrying capacity and of the power losses in the oil film of the new type and of the commonly used cylindrical worm gearings has been carried out.

Copyright © 1997 by The American Society of Mechanical Engineers
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