A turbocharger turbine and impeller bx life prediction method

Abstract

The invention discloses a method for predicting BX (X% bearing failure) service lives of turbines and impellers of turbochargers. The method includes selecting the impellers and the turbines of the turbochargers; operating engines on specified paths and acquiring path spectra of the turbochargers; determining characteristic boundaries of the turbochargers according to the path spectra of the turbochargers; carrying out simulation analysis on the impellers and the turbines according to material attributes of the impellers and the turbines and the characteristic boundaries of the turbochargers; predicting the BX service lives of the turbines and the impellers according to simulation analysis results. The selected impellers and the selective turbines of the turbochargers are matched with the performance of the engines. The method has the advantages that the accurate actual service lives can be predicted, structural failure risks can be quantified, and requirements on lightweight designs can be met.

Description

technical field [0001] The invention relates to the field of engine engineering, in particular to a method for predicting the life of a supercharger turbine and impeller BX. Background technique [0002] The turbine and impeller are the core components of the turbocharger. The structural design, structural strength and durability reliability requirements of the turbine and impeller directly determine the performance, service life and emission effect of the turbocharger. Therefore, the structural reliability of the turbine and impeller Sex calculations are even more important. The design focus of the supercharger is mainly reflected in these aspects: a. Excellent performance (high efficiency, low fuel consumption, etc.); b. Structural reliability (random road test of the engine road test); c. Comfort (NVH ). [0003] The traditional reliability analysis method of turbocharger turbine and impeller is often used to calculate its limit speed by using centrifugal load. This tra...

AI Technical Summary

Problems solved by technology

[0003] The traditional reliability analysis method of turbocharger turbine and impeller is often used to calculate its limit speed by using centrifugal load. This traditional method is certainly a reliability analysis method, but it has certain limitations. It can only conservatively predict supercharging The design speed of the inverter is easy to cause redundancy in the structural design, which brings great challenges to the lightweight design

[0004] Aiming at the problem that the limitation of the reliability analysis method in the existing technology causes redundant structural design and cannot meet the needs of lightweight design, there is no effective solution yet

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