This paper summarizes the results of testing on the U.S. Army XCH-62 Heavy Lift Helicopter (HLH) combiner transmission. This trasmission is rated at 10.620 HP. Program elements included design and fabrication of new bevel gears, static and dynamic strain surveys of the transmission gears, optimization of gear bending stresses following the first strain survey, correlation of FEM analysis with measured stresses, evaluation of a new lubricant to raise the scuffing/scoring load limitation, measurement of gear tooth temperatures under operation conditions, and load testing. The findings establish that 100 percent of design loading was attained within the permissible range of measured gear tooth bending stress limits, AEO conditions; 95 percent of design loading was attained within the above limits, OEI conditions. Alternating stresses on the collector gear set the load limits. Further analytical effort is required to accurately predict the stress levels in gears loaded on both sides of the teeth as is the collector gear.
Development of a large, spiral bevel gear rotorcraft transmission
Entwicklung eines grossen Kraftuebertragungssystems mit Spiralkegelradgetrieben fuer Hubschrauber
AIAA-Papers ; Jul ; 1-6
1987
6 Seiten, 18 Quellen
Conference paper
English
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