Fracture Failure Analysis of Gas Motor Transmission Shaft in a Marine Diesel Engine
During the development of a project,the transmission shaft of an air motor is broken when it starts the engine for 25-30 times.The fracture analysis of the gas motor transmission shaft is applied on several as-pects,such as use conditions,the structure,hardness,and metallographic analysis.The results of analysis show the transmission shaft failure mode is Multi-Source Fatigue Fracture.The main reason is a crack is appeared on the tooth root of spline shaft because of an abnormal shock.The crack is extending into a breakage,because of the incorrect design structure of spline shaft and the incorrect heat treatment process.
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