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Non-contact rotating vane vibration testing method based on positioning without rotating speed

A vibration test, non-contact technology, applied to measuring devices, measuring ultrasonic/sonic/infrasonic, instruments, etc., to simplify modification work, easy application, and eliminate unsafe factors

Active Publication Date: 2013-10-23
AECC SHENYANG ENGINE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Application of Non-Contact Blade Vibration Testing Technology Without Speed ​​Positioning

Method used

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  • Non-contact rotating vane vibration testing method based on positioning without rotating speed
  • Non-contact rotating vane vibration testing method based on positioning without rotating speed
  • Non-contact rotating vane vibration testing method based on positioning without rotating speed

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Embodiment 1

[0031] This embodiment provides a non-contact rotating blade vibration test method based on non-rotating speed positioning, which is characterized in that: the non-contact rotating blade vibration testing method based on non-rotating speed positioning is aimed at the commonly used non-contact rotating blade There are problems in the vibration test of rotating blades. An improved non-contact blade vibration test method based on blade pulse positioning. The principle of non-contact rotating blade vibration test is as follows figure 1 , Install a magnetic steel sensor on the rotor to obtain the positioning reference pulse signal, install two blade tip amplitude sensors above the measured blade casing, and another positioning reference sensor is installed on the shaft to give the blade speed and the blade When the blade vibrates, it passes through the time interval of the blade tip amplitude sensor; when the blade vibrates, the blade tip shifts in the direction of rotation, and the t...

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Abstract

The invention relates to a non-contact rotating vane vibration testing method based on positioning without rotating speed. A magnetic steel sensor is mounted on a rotor piece to obtain reference positioning pulse signals, two blade-tip amplitude sensors are mounted over a tested-level blade casing, and a reference positioning sensor is mounted on a shaft to provide rotating speed of a blade and a time interval at which the blade passes through the blade-tip amplitude sensors when the blade is not vibrated; when the blade is vibrated, the blade tip generates deviation in the rotation direction, and the time for which the blade tip reaches the sensor changes; and vibration parameters such as amplitude, phase and frequency of the blade can be obtained according to the variation. The testing method of the invention has the advantages that the magnetic steel sensors are not installed in the generator rotor, rotating-speed positioning signals are not equipped, and a fiber sensor can be used as positioning signals, thereby eliminating unsafe factors caused by providing the rotor part with the sensors, simplifying testing and refitting, substantially shortening the testing and refitting period, and providing a brand new testing method for non-contact blade vibration test.

Description

Technical field [0001] The invention relates to the field of non-contact rotating blade vibration testing, in particular to a non-contact rotating blade vibration testing method based on non-rotating speed positioning. Background technique [0002] Since the 1970s, the United States, Germany, Japan and other countries have successively carried out non-contact rotating blade vibration measurement technology research, which is a new type of rotating blade vibration measurement method after the traditional strain gauge measurement method. The basic principle of the non-contact rotating blade vibration test technology is: install a tip amplitude sensor on the casing of the blade rotation plane, install a speed positioning sensor in the engine rotor component to identify high-speed rotating blades, and the blade sweeps the tip amplitude sensor to get the blade reach At the time, the blade vibration characteristics such as blade vibration amplitude, frequency and phase are obtained by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00
Inventor 胡伟王磊刘俊峰袁雪姜柳纪长江亓继
Owner AECC SHENYANG ENGINE RES INST
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