Accession Number : ADA290193

Title :   Improvements in Spiral-Bevel Gears to Reduce Noise and Increase Strength.

Descriptive Note : Technical memo.,

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

Personal Author(s) : Lewicki, David G. ; Handschuh, Robert F. ; Henry, Zachary S. ; Litvin, Faydor L.

PDF Url : ADA290193

Report Date : MAY 1994

Pagination or Media Count : 8

Abstract : Advanced-design spiral-bevel gears were tested in an OH-58D helicopter transmission using the NASA 500-hp Helicopter Transmission Test Stand. Four different gear designs were tested. The four designs tested were the current design of the OH-58D transmission, a higher-strength design the same as the current but with an increased fillet radius to reduce gear tooth bending stress, and two versions of a lower-noise design the same as the high-strength but with modified tooth geometry to reduce transmission error and noise. Noise, vibration, and tooth strain tests were performed and significant gear stress and noise reductions were achieved.

Descriptors :   *NOISE REDUCTION, *GEARS, *MACHINERY NOISE, *LOW NOISE, STRESSES, VIBRATION, TRANSMITTANCE, TOPOLOGY, HIGH STRENGTH, ERRORS, GEOMETRY, BENDING STRESS, GEAR TEETH, TRANSMISSIONS(MECHANICAL).

Subject Categories : Acoustics
      Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE