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A method for evaluating the reliability life of supercharger compressor impeller blades due to vibration fatigue

An impeller blade and vibration fatigue technology is applied in the field of structural reliability and life evaluation of the compressor impeller of a turbocharger for vehicles. question

Active Publication Date: 2016-10-19
CHINA NORTH ENGINE INST TIANJIN
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Problems solved by technology

However, this evaluation method does not consider the influence of the fatigue characteristics and dispersion of the compressor impeller blades, and cannot perform reliability analysis and life evaluation on the fatigue failure mode of the compressor impeller due to blade vibration.

Method used

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  • A method for evaluating the reliability life of supercharger compressor impeller blades due to vibration fatigue
  • A method for evaluating the reliability life of supercharger compressor impeller blades due to vibration fatigue
  • A method for evaluating the reliability life of supercharger compressor impeller blades due to vibration fatigue

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Embodiment Construction

[0039] A vehicle turbocharger compressor impeller vane vibration fatigue reliability life evaluation method, comprising the following steps:

[0040] a. Determine the operating conditions of the vehicle turbocharger and the working state parameters of the compressor impeller: combined with the task profile of the vehicle engine, use the simulation calculation method or pass the test test according to the matching relationship between the turbocharger and the engine to determine the The operating conditions of the turbocharger and its composition and the corresponding operating time under different operating conditions; then, according to the operating conditions of the turbocharger, use simulation calculation or test methods to determine the compressor impeller under different operating conditions Working state parameters during operation, namely compressor impeller speed, inlet temperature, outlet temperature, inlet pressure, outlet pressure and flow;

[0041] For example, th...

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Abstract

The invention relates to a method for evaluating the reliable life of vibration fatigue of a turbocharger compressor impeller blade for a vehicle. Firstly, the operating condition of the turbocharger for a vehicle and the working state parameters of the compressor impeller are determined, and then the vibration of the blade of the compressor impeller is determined. Fatigue dangerous parts and the stress parameters corresponding to each working condition, and then use the test method to determine the fatigue strength of the vibration fatigue dangerous parts of the compressor impeller blades, and compare the equivalent stress of the compressor impeller blade vibration fatigue dangerous parts under different working conditions The size between the fatigue limits of the blades and the effective stress parameters for the evaluation of the vibration fatigue life of the compressor impeller blades are determined, and the probability distribution characteristics of the vibration fatigue life of the compressor impeller blades and the reliable life that meet different reliability requirements are determined. It is possible to evaluate the reliable life of the blade vibration fatigue of the compressor impeller during the development stage of the turbocharger, which can better guide the structural design and rational use of the compressor impeller.

Description

technical field [0001] The invention belongs to a structural reliability and life evaluation method of a turbocharger compressor impeller used in a vehicle, and in particular relates to a method for evaluating the reliable life of vibration fatigue of a compressor impeller blade of a turbocharger used in a vehicle. Background technique [0002] GJB451A-2005 "Reliability Maintainability and Supportability Terminology" describes the concept of task profile: a sequential description of events and environments experienced by a product during the period of completing specified tasks. [0003] The turbocharger is one of the key components of the vehicle engine to increase the power density and enhance the adaptability of the plateau environment. As the core part of the turbocharger, the compressor impeller directly affects the reliability of the turbocharger and the entire engine. Reliability and service life. Blade vibration fatigue failure is an important failure mode of the tu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 王正王增全门日秀王阿娜张宇飞张俊
Owner CHINA NORTH ENGINE INST TIANJIN
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