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Prediction method of fatigue creep life of turbine blade root of radial turbocharger for vehicle

A turbocharger turbine, fatigue creep technology, applied in instruments, special data processing applications, geometric CAD, etc., can solve problems such as damage, engine failure, turbocharger damage, etc., to ensure reliability and safety sexual effect

Active Publication Date: 2020-04-10
CHINA NORTH ENGINE INST TIANJIN
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] Once the blade root of the turbocharger turbine breaks during the working process, it will not only cause damage to the turbocharger and make the engine unable to work normally, but the broken blade may also penetrate the turbine box and cause damage to the engine or other parts of the vehicle

Method used

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  • Prediction method of fatigue creep life of turbine blade root of radial turbocharger for vehicle
  • Prediction method of fatigue creep life of turbine blade root of radial turbocharger for vehicle
  • Prediction method of fatigue creep life of turbine blade root of radial turbocharger for vehicle

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Embodiment Construction

[0027] The method for predicting the fatigue creep life of the turbine blade root of a radial supercharger for a vehicle is characterized in that it includes the following steps:

[0028] a. Determine the working state parameters and statistical characteristics of the vehicle engine matched with the turbocharger turbine: combined with the task profile of the vehicle engine installed with the turbocharger turbine, use simulation calculation methods or test to determine the engine The change history of output torque, rotational speed and power with the working time of the engine. Further, the statistical analysis method is used to determine the probability distribution models of the engine output torque, rotational speed and power respectively, and at the same time, determine the vehicle "start-run-stop" work The change law of the number of cycles with the engine working time, using a Poisson random process with a parameter of λ to describe the change law of the vehicle "start-dr...

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Abstract

The invention relates to a method for predicting the creep / fatigue life of a turbine blade root of a vehicle radial turbocharger. The method comprises the following steps: firstly, determining work state parameters of a vehicle engine matched with a turbocharger turbine and statistic characteristics thereof; secondly, determining the work state parameter of the turbocharger turbine and statistic characteristics thereof; thirdly, determining the stress and temperature parameters of the invalid dangerous position of the turbocharger turbine blade root; and determining the fatigue performance parameter and durability parameter of the turbocharger turbine blade root, and determining the fatigue creep life of the turbocharger turbine blade root. The method can be used for scientifically determining the fatigue creep life of the turbocharger turbine blade root in the developing stage or using process of the vehicle turbocharger turbine blade, can be used in reliability analysis and service life evaluation of the vehicle radial turbocharger turbine blades, and is used for guiding structure optimized design and reasonable utilization of the turbocharger turbine blade, so that the reliability and safety of the vehicle turbocharger turbine in the working process can be ensured.

Description

technical field [0001] The invention belongs to a method for evaluating the reliability and life of a turbocharger turbine structure for a vehicle, in particular to a method for predicting the fatigue creep life of a turbine blade root of a radial supercharger for 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 a key component for vehicle engines to increase power density and enhance the adaptability to plateau environments. The turbine impeller is one of the core components of the turbocharger, and its reliability and life directly affect the reliability of the turbocharger or booster system. The turbine impeller of the supercharger must not only have good aerodynamic performance and be able to efficiently convert th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/15G06F119/04G06F119/14G06F119/08
CPCG06F30/23G06F2119/04G06F2119/06G06F2119/08
Inventor 王正王增全邢卫东王阿娜赵力明
Owner CHINA NORTH ENGINE INST TIANJIN
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