Accession Number : ADA290190

Title :   A Method for Thermal Analysis of Spiral Bevel Gears.

Descriptive Note : Technical memo.,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER

Personal Author(s) : Handschuh, Robert F. ; Kicher, Thomas P.

PDF Url : ADA290190

Report Date : JUL 1994

Pagination or Media Count : 8

Abstract : A modelling method for analyzing the three-dimensional thermal behavior of spiral bevel gears has been developed. The model surfaces are generated through application of differential geometry to the manufacturing process for face-milled spiral bevel gears. Contact on the gear surface is found by combining tooth contact analysis with three-dimensional Hertzian theory. The tooth contact analysis provides the principle curvatures and orientations of the two surfaces. This information is then used directly in the Hertzian analysis to find the contact size and maximum pressure. Heat generation during meshing is determined as a function of the applied load, sliding velocity, and coefficient of friction. Each of these factors change as the point of contact changes during meshing. A nonlinear finite element program was used to conduct the heat transfer analysis. This program permitted the time- and position-varying boundary conditions, found in operation, to be applied to a one-tooth model. An example model and analytical results are presented.

Descriptors :   *THERMAL ANALYSIS, *GEARS, *SLIDING FRICTION, VELOCITY, HEAT TRANSFER, MANUFACTURING, SIZES(DIMENSIONS), FINITE ELEMENT ANALYSIS, THEORY, SURFACES, THREE DIMENSIONAL, NONLINEAR SYSTEMS, COEFFICIENTS, PRESSURE, HEAT, THERMAL STRESSES, TEETH, DIFFERENTIAL GEOMETRY.

Subject Categories : Mechanics
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE