GLTRS--Glenn
TITLE AND SUBTITLE:
Experimental Evaluation of Face Gears for Aerospace Drive System Applications

AUTHOR(S):
Robert F. Handschuh, David G. Lewicki, Gregory F. Heath,
and Robert B. Bossler, Jr.

REPORT DATE:
September 1996

FUNDING NUMBERS:
WU-505-62-36
1L161102AH45

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
NASA Lewis Research Center
Cleveland, Ohio 44135-3191
and
Vehicle Propulsion Directorate
U.S. Army Research Laboratory
Cleveland, Ohio 44135-3191

PERFORMING ORGANIZATION REPORT NUMBER:
E-10265

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Washington, D.C. 20546-0001
and
U.S. Army Research Laboratory
Adelphi, Maryland 20783-1145

REPORT TYPE AND DATES COVERED:
Technical Memorandum

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TM-107227
ARL-TR-1109

SUPPLEMENTARY NOTES:
Prepared for the Seventh International Power Transmission and Gearing Conference sponsored by the American Society of Mechanical Engineers, San Diego, California, October 6-9, 1996. Robert F. Handschuh and David G. Lewicki, Vehicle Propulsion Directorate, U.S. Army Research Laboratory, Lewis Research Center; Gregory F. Heath, McDonnell Douglas Helicopter Company, Mesa, Arizona; Robert B. Bossler, Jr., Private Consultant, Hacienda Heights, California. Responsible person, Robert F. Handschuh, organization code 2730, (216) 433-3969.

ABSTRACT:
The experimental evaluation of face gears has been ongoing at NASA Lewis since 1991. Testing to date has focused on the feasibility of using this gear mesh to transfer power between intersecting shafts as found in helicopter main rotor transmissions. The focus of the experiments has been to determine the failure modes and load capacity of this gear mesh operated in a simulated helicopter transmission environment. At this time tests have been completed on a total of ten sets of face gears using a test facility located at NASA Lewis. Surface pitting was the predominant failure mode generated, however bending failures were also experienced. All tooth fractures due to pitting or bending occurred on the gear member. The spur gear pinion typically only had minor wear. Results from these tests indicated that the components would have to use aerospace gear materials and advanced manufacturing procedures to achieve the desired long component life.

SUBJECT TERMS:
Gears; Transmissions; Mechanical drives

NUMBER OF PAGES:
10

PDF AVAILABLE FROM URL:
1996/TM-107227.pdf
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