Study on the Failure Mode and Control Method of Supercharger Impeller Shaft

Off axis refers to the use of the process of the turbocharger impeller rotor shaft fracture. It is the main failure mode of the exhaust gas turbocharger, the irreversible phenomenon. When the impeller rotor shaft fracture, the turbocharger immediately stop the work, the overall maintenance program so can not enter the turbocharger turbocharger scrapped. The reason of the broken shaft is mainly in the following aspects: The first is the local stress concentration on the structural design of the shaft; The second is the composition of Turbine material; The third is that the processing residues chip caused impeller stuck. We can through the following means to solve the above cis title. The first, we can solve the problem of broken shaft impeller shaft by improved design of the shaft structure and process, enhance surface strength, reduce stress concentration. The second, we can enhance the material composition and the mechanical strength of the casting of the impeller through the control of the manufacturing process and assembly process improvements. The third, in the process, in strict accordance with the design requirements, parts processing must be cleaned