Method for restricting rotation of rotary machinery rotor

Abstract

The invention discloses a method for restricting rotation of a rotary machinery rotor. The method comprises the following steps: firstly determining the maximum rotation position of a rotor in a small rotary machinery rotor system; subsequently fixing a magneto-rheological elastomer dynamic vibration absorber on the rotor system so as to perform the operation for restricting the vibration, wherein the magneto-rheological elastomer dynamic vibration absorber is used according to the following steps: fixing the magneto-rheological elastomer dynamic vibration absorber at the maximum rotation position of the rotor, and starting the system of the magneto-rheological elastomer dynamic vibration absorber to reduce vibration amplitude of the rotor and restrict the vibration, wherein the value of rigidity ka of the magneto-rheological elastomer dynamic vibration absorber is regulated by specifically utilizing the characteristic that the rigidity of a magneto-rheological elastomer is controllable, so that the inherent frequency is nearly equal to the vibration frequency of the rotary machinery rotor system. According to the method disclosed by the invention, the equipment is good in controllability and low in fault rate; the system is good in operation stability; the method can be used for restricting the vibration of the rotary machinery rotor system.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, and in particular relates to a method for suppressing the vibration of a rotary machine rotor. Background technique [0002] In the prior art, rotating machinery is widely used in the national economy. In order to improve the efficiency of the rotor system, the gap between the rotor and the stator is getting smaller and the speed is getting higher and higher, and the problem of equipment failure caused by its vibration is becoming more and more prominent. These failures It will cause serious harm, not only affect the stable operation of the equipment, some even cause catastrophic consequences. [0003] At present, vibration suppression methods are mainly divided into passive control and active control. Passive control mainly includes the installation of dynamic vibration absorbers, additional damping and other methods, the applicable frequency band is narrow, and due to the excessive increa...

AI Technical Summary

Problems solved by technology

Passive control mainly includes the installation of dynamic vibration absorbers, additional damping and other methods, the applicable frequency band is narrow, and due to the excessive increase of additional mass and other reasons, the inherent characteristics of the original system change, the increase in unbalance, etc. affect the performance of the equipment; active control It mainly includes electromagnetic methods, damping methods, various regulators, etc. However, in many cases, the vibration control technology has a cumbersome structure, high energy consumption, and imperfections. The impact is large, the damper often fails, and serious instability problems occur in the supercritical region of the rotor, etc.

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