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Method for measuring radial vibration displacement of eccentric disc

An eccentric disc and radial vibration technology, applied in the field of measurement, can solve problems such as not finding a better one

Inactive Publication Date: 2007-09-19
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

How to eliminate this error signal, the technicians have not yet found a better method and device

Method used

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  • Method for measuring radial vibration displacement of eccentric disc
  • Method for measuring radial vibration displacement of eccentric disc
  • Method for measuring radial vibration displacement of eccentric disc

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Embodiment Construction

[0031] When measuring the radial vibration displacement of the eccentric disk, the present invention sets an auxiliary measuring point on the basis of the original horizontal and vertical direction sensors, collects and obtains 3 sensor signals, and then obtains 3 measuring points respectively through a series of calculations Corresponding to the error signal of the distance change between the disc and the sensor due to eccentricity and the vibration signals in the horizontal and vertical directions, so as to achieve the purpose of accurately measuring the vibration of the eccentric disc.

[0032] As shown in Figure 1: point o' is the geometric center of the disc, o is the actual center of rotation when the disc is installed eccentrically, the radius of the disc is r, the eccentricity is e, the rotational angular velocity of the rotor is ω,  is o The angle between the line connecting 'o and the negative direction of the x-axis, then =ωt. The intersection of three eddy curren...

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Abstract

The present invention provides a method for measuring the radial vibration displacement of an eccentric disc for providing the accuracy of the measuring. Displacement sensors are provided on the three positions in the periphery of the measured disc; the signals of each sensor are collected; the signals are processed to obtain the error signal of the change of the distance between the disc and the sensor cased by eccentricity of each measured points and vibration signals in the horizontal direction and the vertical direction, thus, the exact data of the vibration displacement of the eccentric disc. The influence to the exact measuring of the eccentric disc from the installation eccentric error between the disc and the rotor which supports the rotating of the disc caused by the processing and installing error in the measuring of the vibration displacement of the rotatory body is eliminated; the familiar problems in the measuring of the rotatory and mechanical vibration displacement are solved; and the present invention has a remarkable effect on the improving of the precision of the measuring of the rotatory and mechanical vibration displacement.

Description

technical field [0001] The invention relates to a method for measuring the vibration of a disc rotating body, which belongs to the field of measurement technology. Background technique [0002] The vibration displacement measurement of rotating machinery is one of the common problems in the field of vibration engineering. The commonly used measurement method is to install eddy current sensors in the horizontal and vertical directions of the rotor to measure the vibration displacement of the rotor in the horizontal and vertical directions respectively. However, for disc parts, when the disc is concentric with the rotor supporting its rotation, the above method can still be used to measure its vibration. In practice, due to processing or installation errors, when there is an installation eccentricity error between the disk and the rotor that supports its rotation, when the sensor is used for data collection, the signal will include both the vibration of the disk and the instal...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/24
Inventor 万书亭王广庆唐贵基李永刚
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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