Analysis of failed bevel gear and pinion of aeroengine gearbox

Suresh Kumar, M and Madan, M and Venkataswamy, MA and Sujata, M and Bhaumik, SK (2006) Analysis of failed bevel gear and pinion of aeroengine gearbox. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

A few failed components of engine gearbox PT-6 (with modified PTO shaft and EBW bevel gear) were sent to the laboratory for investigation. Examination revealed that the bevel gear assembly has failed by fatigue. There was multiple fatigue crack initiation at the weld as well as the spur gear spline roots. Investigation showed that generation of these cracks was independent of each other and hence, they need to be addressed separately. Both metallurgical incompatibility at the weld and high stresses on the spur gear splines have contributed to the present failure. A detailed analysis of the failure is presented and a few recommendations have been suggested.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Aeroengine gearbox; bevel gear assembly; weld; residual stresses; fatigue
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division
Depositing User: Raghavendra R chandu
Date Deposited: 25 Jul 2011 10:15
Last Modified: 25 Jul 2011 10:15
URI: http://nal-ir.nal.res.in/id/eprint/9558

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