Evaluation method for reliable life of blade vibration fatigue of gas compressor impeller of supercharger

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. problems, to achieve the effect of good structural design and rational use

Active Publication Date: 2014-04-23
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 blad

Method used

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  • Evaluation method for reliable life of blade vibration fatigue of gas compressor impeller of supercharger
  • Evaluation method for reliable life of blade vibration fatigue of gas compressor impeller of supercharger
  • Evaluation method for reliable life of blade vibration fatigue of gas compressor impeller of supercharger

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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, the...

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Abstract

The invention relates to an evaluation method for reliable life of blade vibration fatigue of a gas compressor impeller of an automotive turbosupercharger. The method comprises the following steps: firstly, the operation condition of the automotive turbosupercharger and the working state parameters of the gas compressor impeller are determined; then, the dangerous parts of the blade vibration fatigue of the gas compressor impeller and the stress parameters of every corresponding working condition are determined; then, the fatigue strength of the dangerous parts of the blade vibration fatigue of the gas compressor impeller is determined by adopting a test method to compare the magnitude relation between the equivalent stress of the dangerous parts of the blade vibration fatigue of the gas compressor impeller and the fatigue limit of the blades under different working conditions and determine the effective stress parameters for evaluating the blade vibration fatigue life of the gas compressor impeller; the probability distribution characteristics of the blade vibration fatigue life of the gas compressor impeller and the reliable life meeting different reliability requirements are determined. The method can evaluate the reliable life of the blade vibration fatigue of the gas compressor impeller in the development stage of the turbosupercharger, and can preferably guide the structural design and reasonable use of the gas 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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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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