Using Hob Offset to Balance Dynamic Strength in Spur Gears.

Abstract

This paper presents an analytical study on the effect of bob offset on the dynamic tooth strength of spur gears. The study was limited to equal and opposite offset values applied to the pinion and gear to maintain the standard operating center distance. The analysis presented in this paper was performed using a new version of the NASA gear dynamics code DANST. The operating speed of the transmission has a significant influence on the amount of hob offset required to equalize the dynamic stresses in the pinion and gear. In the transmission studied, at low speeds, the optimum hob offset value was found to fluctuate. At higher speeds, the optimum value was constrained by the minimum allowed thickness at the tip of the pinion tooth. For gears that must operate over a range of speeds, an average offset value may be used. Spur gears designed with the procedure presented here can have significant improvements in load capacity. (AN)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1995
Accession Number
ADA303660

Entities

People

  • Chuen-huei Liou
  • Dennis P. Townsend
  • Fred B. Oswald
  • Hsiang Hsi Lin

Organizations

  • Glenn Research Center

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Bending Stress
  • Computer Programs
  • Computers
  • Cutting Tools
  • Dynamic Loads
  • Dynamic Response
  • Dynamics
  • Equations
  • Equations Of Motion
  • Geometry
  • Military Research
  • Resonant Frequency
  • Standards
  • Static Loads
  • Teeth
  • Thickness

Readers

  • Radio communications and signal processing.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).