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A Quick Separation Method for Rubbing Instability Rotor/Stator

A separation method and rotor technology, applied in the direction of machine/engine, blade support element, safety device, etc., can solve the problems of control failure, high manufacturing and maintenance costs, complex controller structure, etc., to reduce excessive damage and performance. Reliable, avoid excessive damage effect

Active Publication Date: 2017-12-26
XI AN JIAOTONG UNIV +1
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  • Summary
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although the active control method can stabilize the system in an ideal state of motion to a certain extent, once the rotor is disturbed and enters the dry friction self-excited reverse instability, this method is difficult to make it out of this large oscillation state, which is easy to cause Control failure, and its controller structure is complicated, and the manufacturing and maintenance costs are high

Method used

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  • A Quick Separation Method for Rubbing Instability Rotor/Stator
  • A Quick Separation Method for Rubbing Instability Rotor/Stator
  • A Quick Separation Method for Rubbing Instability Rotor/Stator

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0026] The quick separation method of rubbing instability rotor / stator provided by the present invention comprises the following operations:

[0027] After the rotor / stator rubbing system enters the dry friction reverse instability, the random noise excitation is applied to the rotor as a non-contact random load disturbance, and the unbalanced response of the rotor will rapidly change from the dry friction reverse instability with a large amplitude Transition to the small oscillation without rubbing; then remove the random noise excitation, the rotor will continue to maintain the normal running state without rubbing.

[0028] This method starts from the perspective of stochastic dynamics, combined with the bifurcation theory of nonlinear systems induced by noise, and proposes a non-contact ra...

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Abstract

The invention provides a quick separation method of rubbing instability rotor / stator, after the rotor / stator rubbing system enters dry friction reverse instability, random noise excitation is applied to the rotor as non-contact random load disturbance, the rotor The unbalanced response will quickly transition from the reverse instability of dry friction with large amplitude to the small oscillation without rubbing; then remove the random noise excitation, and the rotor will continue to maintain the normal operation state without rubbing. The invention can make the rotor / stator system break away from the dry friction reverse instability state induced by random noise, and return to the state of small response, so as to avoid excessive damage to the rotor and the stator. The method has the advantages of fast separation speed, easy realization, reliable performance and the like.

Description

technical field [0001] The invention belongs to the technical field of safety assurance of rotating machinery, and relates to a rapid separation method for a rubbing unstable rotor / stator. Background technique [0002] The rotor-bearing system is a key component in turbomachinery, and is widely used in important industries such as electric power, chemical industry, machinery, aviation, vehicles and ships. A rotor system usually consists of a rotor (blade) and a stator (seal). The design gap in the structure of such dynamic and static parts will bring heat loss on the one hand, and on the other hand, it is also the structural source of rubbing. Due to foundation vibration, external force impact, etc., even if the unit is in normal operation at the beginning, it may deviate from the running track. When the response amplitude of the rotor exceeds the design clearance, it will cause the rotor to contact the stator, thereby inducing the rubbing of the static and static parts. At...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D21/00F01D21/04F01D5/10
CPCF01D5/10F01D21/00F01D21/04
Inventor 李自刚单锦州江俊王顺增
Owner XI AN JIAOTONG UNIV
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