Accession Number : ADA290344

Title :   Computerized Design of Low-Noise Face-Milled Spiral Bevel Gears.

Descriptive Note : Technical memo.,

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

Personal Author(s) : Litvin, Faydor L. ; Zhang, Yi ; Handschuh, Robert F.

PDF Url : ADA290344

Report Date : AUG 1994

Pagination or Media Count : 21

Abstract : An advanced design methodology is proposed for the face-milled spiral bevel gears with modified tooth surface geometry that provides a reduced level of noise and has a stabilized bearing contact. The approach is based on the local synthesis of the gear drive that provides the best'machine-tool settings. The theoretical aspects of the local synthesis approach are based on the application of a predesigned parabolic function for absorption of undesirable transmission errors caused by misalignment and the direct relations between principal curvatures and directions for mating surfaces. The meshing and contact of the gear drive is synthesized and analyzed by a computer program. The generation of gears with the proposed geometry design can be accomplished by application of existing equipment. A numerical example that illustrates the proposed theory is presented. (AN)

Descriptors :   *TRANSMISSION GEARS, STABILIZATION, VELOCITY, COMPUTER PROGRAMS, MATHEMATICAL MODELS, COMPUTERIZED SIMULATION, COMPUTER AIDED DESIGN, HELICOPTERS, SURFACE PROPERTIES, ERROR ANALYSIS, NOISE REDUCTION, DESIGN CRITERIA, MISALIGNMENT, ANTIFRICTION BEARINGS, GEAR TEETH.

Subject Categories : Machinery and Tools
      Computer Programming and Software
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE