Flexible rotor low speed holographic dynamic balancing method

A flexible rotor and rigid rotor technology, applied in the field of holographic dynamic balancing, to achieve the effect of reducing multiple start-stop balancing tests, reducing balancing risks, and improving balancing accuracy

Inactive Publication Date: 2004-03-17
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As mentioned above, the traditional low-speed balance can only balance the rotor in the rigid mode; when the operating speed exceeds the first-order critical speed, the new unbalance of the rotor in the flexible mode needs to be balanced by high-speed dynamic balancing

Method used

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  • Flexible rotor low speed holographic dynamic balancing method
  • Flexible rotor low speed holographic dynamic balancing method
  • Flexible rotor low speed holographic dynamic balancing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0084] Balance scheme 1: Prioritize the balance force component

[0085] The balancing procedure for prioritizing balancing force components is as follows: Figure 4 As shown, the specific description is as follows:

[0086]1. Measure the basic data. The working speed of the rotor is Ω=3600rpm, and the vibration at the working speed before shutdown is measured; the Bode diagram of the rotor shutdown process is obtained in the experiment, and ω=1900rpm is selected as the balance speed lower than the first-order critical value of the rotor; the measurement test bench is in The vibration in the cranking state is used as the runout, and the shaft vibration value must be deducted from the original runout; measure the original vibration of the rotor when ω=1900rpm (sampling frequency 2kHz, filter 1kHz, sampling points 2048);

[0087] 2. After subtracting the original beating from the vibration data, make a three-dimensional holographic spectrum to obtain the initial phase point; at...

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Abstract

The invention relates to a flexible rotor low speed holographic dynamic balancing method in the rotation mechanical oscillation diagnosis and control field, wherein a three-dimensional holographic spectrum is used to describe the variation rule of the vibration behaviors for the flexible rotor before and after a first step whirling speed, using a low speed below the whirling speed as a balancing rotational speed to distinguish the rotor unbalance with the other rotating frequency impairment, then the balanced surface is selected, and perform normalization pretreatment to the collected data using key phase signal. The method by the invention provides a scientific proof means for the slow running balanced flexible rotor.

Description

1. Technical field [0001] The invention belongs to the technical field of rotor dynamic balance, and further relates to the field of fault diagnosis and control of rotating machinery, in particular, it is mainly used to achieve a flexible rotor at a working speed higher than the first-order critical speed at a balance speed lower than the first-order critical speed of the rotor. Holographic dynamic balancing method for second-order modes. 2. Background technology [0002] Due to the different working speed, structure and rigidity of rotors and the different balance precision requirements of various rotors, rigid rotor balance and flexible rotor balance can be used to obtain the required balance precision of the rotor. When the working speed of the rotor is much lower than the first-order critical speed of the rotor, and the influence of the rotor deflection on its balance can be ignored, it can be called a rigid rotor; on the contrary, when the additional unbalance caused by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M1/16
Inventor 屈梁生刘石张西宁
Owner XI AN JIAOTONG UNIV
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