Accession Number:

ADA242332

Title:

A Method for Determining Spiral-Bevel Gear Tooth Geometry for Finite Element Analysis

Descriptive Note:

Technical paper

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER

Report Date:

1991-08-01

Pagination or Media Count:

16.0

Abstract:

Spiral bevel gears are currently used in all helicopter power transmission systems. This type of gear is required to turn the corner from a horizontal engine to the vertical rotor shaft. These gears carry large loads and operate at high rotational speeds. Recent research has focused on understanding many aspects of spiral bevel gear operation, including gear geometry, gear dynamics, lubrication, stress analysis and measurement, misalignment, and coordinate measurements, as well as other areas. An analytical method has been developed to determine gear-tooth surface coordinates of face-milled spiral bevel gears. The method uses the basic gear design parameters in conjunction with the kinematical aspects of spiral bevel gear manufacturing machinery. A computer program entitled SURFACE was developed to calculate the surface coordinates and provide three-dimensional model data that can be used for finite element analysis. Development of the modeling method and an example case are presented in this report. This method of analysis could also be applied in gear inspection and near-net-shape gear forging die design.

Subject Categories:

  • Helicopters
  • Numerical Mathematics
  • Computer Programming and Software
  • Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE