Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Quick separation method of rub-impact unstable rotors/stators

A separation method and rotor technology, applied in the direction of machines/engines, blade support components, safety devices, etc., can solve the problems of control failure, high manufacturing and maintenance costs, complex controller structure, etc., to reduce excessive damage and improve performance Reliable, over-damaging effect

Active Publication Date: 2016-08-31
XI AN JIAOTONG UNIV +1
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Quick separation method of rub-impact unstable rotors/stators
  • Quick separation method of rub-impact unstable rotors/stators
  • Quick separation method of rub-impact unstable rotors/stators

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a quick separation method of rub-impact unstable rotors / stators. After a rotor / stator rub-impact system enters in a dry-friction reverse unstable state, random noise excitation is applied to the rotors to serve as non-contact random load disturbance, and the unbalanced response of the rotors enables the system to jump to the rub-impact-free small-amplitude oscillation state quickly from the large-amplitude dry-friction reverse unstable state; and then random noise excitation is removed, and the rotors continue to maintain the rub-impact-free normal operating state. According to the method, a rotor / stator system can be separated from the dry-friction reverse unstable state under induction of random noise, and return to the small-amplitude response state, and accordingly excessive damage of the rotors and the stators is avoided. The method has the advantages of being high in separation speed, convenient to implement, reliable in 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com