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Method for detecting dynamic balance fault of multi-wheel-disc shafting of rotary machine without trial weight

A technology for rotating machinery and balancing faults. It is used in static/dynamic balance testing, measuring devices, and machine/structural component testing. It can solve problems such as difficulty.

Active Publication Date: 2019-12-17
JIANGSU FRONTIER ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method does not need to be aggravated, but the reliability of this method depends on the accuracy of the technician's knowledge of the vibration problem and the dynamic characteristics of the machine, which is difficult

Method used

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  • Method for detecting dynamic balance fault of multi-wheel-disc shafting of rotary machine without trial weight
  • Method for detecting dynamic balance fault of multi-wheel-disc shafting of rotary machine without trial weight
  • Method for detecting dynamic balance fault of multi-wheel-disc shafting of rotary machine without trial weight

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Embodiment Construction

[0065] Below, the present invention will be described in further detail in conjunction with the accompanying drawings and embodiments.

[0066] Such as figure 1 As shown, in this embodiment, the dynamic balance fault of the rotating machine is detected by the method for detecting the dynamic balance fault of the multi-disc shafting of the rotating machine without a test weight according to the present invention, and the details are as follows:

[0067] Carry out the dynamic balance test after the complete rotating machinery is assembled or under the real state of actual installation on site.

[0068] Such as figure 2 and image 3 As shown, the vibration sensors are arranged in the vertical and horizontal directions of the bearing seats on both sides of the rotor containing multiple discs, a total of 4 vibration sensors. Open the key phase groove (or paste reflective sheet) on the rotating shaft as the 0° mark on the rotating shaft, and define the angle of the reverse rotat...

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Abstract

The invention discloses a method for detecting a dynamic balance fault of a multi-wheel-disc shafting of a rotary machine without trial weight. A frequency response function between vibration the bearings on the two sides of a rotor and impact forces received by journals is tested, excitation forces on the journals in the two sides are calculated according to actually measured vibration of the twobearings in the two ends of the rotor, and an unbalanced force is eliminated through dynamic balance weighting on discs at the two ends of the rotor. According to the method, dynamic balance test without trial weight is realized, and the magnitude and angle of the unbalanced force are directly detected from vibration test data; vibration in horizontal and vertical directions and coupling therebetween are considered, an influential coefficient is calculated without establishing a rotor dynamic model, and the accuracy of dynamic balanced test is higher; and the method can be used to effectivelyreduce the frequency and risk of dynamic balance test, improve the efficiency of dynamic balance test of rotary machines, and is especially suitable for dynamic balance fault detection for shafting of the rotary machine in the whole real state.

Description

technical field [0001] The invention relates to a dynamic balance test method of a multi-disc shaft system of a rotating machine, in particular to a method for detecting dynamic balance faults of a multi-disk shaft system of a rotating machine without a test weight. Background technique [0002] In the production and processing of various rotating machinery such as steam turbines, generators, pumps, fans, compressors, and electric motors, there is a common problem of unbalanced rotating parts, that is, the center of gravity of the section where the wheel is located does not coincide with the geometric center, and centrifugal force is generated during the rotation. Can cause vibrations, which can affect the safe operation of the equipment. After the rotating machine is manufactured, a dynamic balance test must be carried out. [0003] There are mainly four kinds of dynamic balance fault detection methods currently used: (1) Influence coefficient method. Through the trial we...

Claims

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Application Information

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IPC IPC(8): G01M1/22G01M1/26G01M1/32
CPCG01M1/22G01M1/26G01M1/32
Inventor 孙和泰孙栓柱周春蕾黄翔高进沈洋王明李春岩杨晨琛潘苗
Owner JIANGSU FRONTIER ELECTRIC TECH
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