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Method for determining position of crack of fan blade

A technology for fan blades and determination methods, which is applied to the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, instruments, and analysis materials, etc., which can solve the difficulty of increasing equipment maintenance, cannot detect cracks specifically, and cannot effectively avoid blade cracks Economical Loss and other issues, to achieve the effect of reducing unplanned production stoppage, fast diagnosis and reliable results

Inactive Publication Date: 2017-03-15
BEIJING UNIV OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

The existing blade crack diagnosis methods, whether based on acoustic emission technology or relying on spectrum analysis of the acquired vibration signals, can only diagnose whether there is a crack in the blade, but cannot specifically detect the location of the crack, and cannot effectively avoid blade cracks. The economic losses caused by cracks also increase the difficulty of equipment maintenance

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  • Method for determining position of crack of fan blade
  • Method for determining position of crack of fan blade
  • Method for determining position of crack of fan blade

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0021] figure 1 It is a flow chart of a method for determining the location of a fan blade crack in the present invention, including the following steps:

[0022] S1. Establish a database of fan blade faults through simulation.

[0023] S2. Measure the natural frequencies of the first few orders of the actual blade to be detected.

[0024] S3. Input the data of the actual blade measured in S2 into the fault data established in S1

[0025] In the library, the crack position of the actual fan blade is detected.

[0026] The invention uses the simulation method to solve the position of the blade crack, not only realizes the timely diagnosis of the fan blade crack, but also realizes the quantitative analysis ...

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Abstract

The invention discloses a method for determining a position of a crack of a fan blade. The method comprises S1, establishing a database of fan blade failure by simulation, S2, measuring first few order natural frequencies of an actual blade to be detected, and S3, inputting the actual blade data measured in the step S2 into the fault database established in the step S1, and detecting the crack position of the actual fan blade. The method uses a simulation method to compute the position of the blade crack, not only realize timely diagnosis of the fan blade crack, but also realize quantitative analysis of the crack position of the fan blade, has a fast diagnosis speed, produces a reliable result and provides a strong guarantee for the equipment maintenance.

Description

technical field [0001] The invention relates to the technical field of equipment fault diagnosis, and more particularly relates to a method for determining the crack position of a fan blade. Background technique [0002] The blade is the key component of the fan, which bears the comprehensive effects of centrifugal force, fluid power, vibration, temperature difference, medium, etc. Nowadays, fan blades are developing toward heavy load, high speed, and light weight, so that the working length and parameters of the blades are constantly increasing, and the working conditions are becoming more and more severe. When the blade is not designed properly, it may cause a major accident of mechanical failure. Accidents caused by blade failures are often catastrophic and cause huge losses. Blade failure seriously affects the economical and safe operation of fans. How to predict blade failure online in real time with a simple method and high accuracy is a problem that plagues the engi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/12
CPCG01N29/12G01N2291/014G01N2291/023G01N2291/2693
Inventor 付胜王宏默
Owner BEIJING UNIV OF TECH
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