The Relative Noise Levels of Parallel Axis Gear Sets with Various Contact Ratios and Gear Tooth Forms

Abstract

The real noise reduction benefits which may be obtained through the use of one gear tooth form as compared to another is an important design parameter for any geared system, especially for helicopters in which both weight and reliability are very important factors. This paper describes the design and testing of nine sets of gears which are as identical as possible except for their basic tooth geometry. Noise measurements were made at various combinations of load and speed for each gear set so that direct comparisons could be made. The resultant data was analyzed so that valid conclusions could be drawn and interpreted for design use.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1993
Accession Number
ADA276299

Entities

People

  • Fred B. Oswald
  • Joseph W. Lenski Jr.
  • Mark Valco
  • Raymond J. Drago
  • Robert H. Spencer

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Analyzers
  • Computers
  • Confidence Limits
  • Frequency
  • Frequency Bands
  • Gear Noise
  • Gears
  • Geometry
  • Helicopters
  • Intensity
  • Measurement
  • Military Research
  • Noise Reduction
  • Power Levels
  • Sidebands
  • Standards
  • Test Facilities

Readers

  • Instructional Design and Training Evaluation.
  • Statistical inference.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).