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Method for evaluating reliability indicator of compressor impeller of turbocharger in altitude environment

A technology of turbocharger and plateau environment, applied in instruments, special data processing applications, electrical digital data processing, etc., can solve the problem of increasing the fatigue failure of compressor impeller hub or blade resonance failure, and reducing the reliability and life of compressor impeller. And other issues

Active Publication Date: 2016-04-06
CHINA NORTH ENGINE INST TIANJIN
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Problems solved by technology

For the turbocharger compressor impeller, the speed of the turbocharger generally shows an increasing trend when the diesel engine is working in a high sea wave area, and the increase in the speed of the turbocharger will increase the hub fatigue failure or blade resonance of the compressor impeller Risk of failure, reducing the reliability and life of the compressor impeller

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  • Method for evaluating reliability indicator of compressor impeller of turbocharger in altitude environment
  • Method for evaluating reliability indicator of compressor impeller of turbocharger in altitude environment
  • Method for evaluating reliability indicator of compressor impeller of turbocharger in altitude environment

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Embodiment Construction

[0024] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0026] A method for evaluating the reliability index of a turbocharger compressor impeller in a plateau environment, such as figure 1 shown, including the following steps:

[0027] Step 1, determine the probability distribution characteristics of the turbocharger speed in the plateau environment;

[0028] According to the working speed of the turbocharger when the engine is working in the plateau area, through the statistical analysis of all the peak working speeds of the turbocharger in one task profile cycle of the engine, the turbocharger corresponding to one task profile cycle of the engine is determined Speed ​​n TC The probability density function of

[0029] In this embodime...

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Abstract

The invention provides a method for evaluating reliability indicator of a compressor impeller of a turbocharger in an altitude environment, comprising the following steps of: a, determining probability distribution characteristics of revolving speed of the turbocharger in the altitude environment; b, determining a failure criteria of a corresponding hub fatigue failure mode of the compressor impeller; c, determining a failure criteria of a corresponding vane resonance failure mode of the compressor impeller; d, determining a reliability degree model of the compressor impeller of the turbocharger in the altitude environment; e, determining a reliability degree change rule of the compressor impeller of the turbocharger in the altitude environment; f, determining the reliability indicator of the compressor impeller of the turbocharger working in the altitude environment. The method provided by the invention can determine the reliability degree change rule and the reliability indicator of the compressor impeller of the turbocharger in the altitude environment; and the method can effectively guide structure optimization design of the compressor impeller and determination of service life in the altitude environment.

Description

technical field [0001] The invention belongs to the technical field of structural reliability evaluation of a turbocharger, and in particular relates to a reliability index evaluation method of a turbocharger compressor impeller in a plateau environment. Background technique [0002] The turbocharger is one of the key components for the diesel engine to increase the power density and improve the adaptability of the plateau environment. As one of the core components of a turbocharger, the compressor wheel has an important influence on the reliability of the entire turbocharger. When a turbocharged diesel engine is working in a high-altitude area, due to changes in the atmospheric environment, the parameters of the engine's air intake, heat loss, output power, fuel consumption rate, and turbocharger speed will vary to varying degrees, making the engine The mechanical load and thermal load conditions of the plain area are obviously different from those of the plain area. When...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17
Inventor 王正王增全邢卫东王阿娜席盛
Owner CHINA NORTH ENGINE INST TIANJIN
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