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Plain bearing rotor system stability distinguishing and controlling technology

A technology of system stability and sliding bearings, applied in mechanical bearing testing, measuring devices, instruments, etc., can solve the problem of unclear relationship between the whirl characteristics and stability of sliding bearing rotors, equipment damage of rotating machinery, and inability to slide bearing rotors System operation stability diagnosis and control and other issues

Inactive Publication Date: 2005-06-01
南京耦合动力工程技术有限公司
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Problems solved by technology

[0003] In engineering practice, there has not been a practical method and standard for the stability criterion of the sliding bearing rotor system in the field of rotating machinery, especially the relationship between the sliding bearing rotor whirl characteristics and stability is not clear, and it is impossible to determine the Effective diagnosis and control are carried out in order to ensure the stability of operation. Therefore, equipment damage accidents of rotating machinery often occur

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  • Plain bearing rotor system stability distinguishing and controlling technology
  • Plain bearing rotor system stability distinguishing and controlling technology
  • Plain bearing rotor system stability distinguishing and controlling technology

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[0017] The eddy coupling excitation analysis method is to analyze and evaluate the resonance of a certain excitation frequency of the system, and the nonlinear coupling vibration displacement limit cycle analysis method is to analyze and evaluate the safety of the system operating state and process. Therefore, vortex coupling excitation is only a condition for system instability, and the coupled vibration causes the eccentricity (ε) of rotor 1 to be greater than the engineering allowable value ε max The result is the basis for judging the instability of the system.

[0018] 1. The analysis method of eddy coupling excitation is how to change the external disturbance parameters of the system (W i ), structural parameters (L, D, λ), physical parameters (μ) and motion parameters (ω 0 , ε), to control the whirl frequency of the journal to effectively avoid the natural frequency of the rotor 1 and the related load excitation frequency ω i * area. The corresponding governing eq...

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Abstract

The present invention is stability judging and controlling technology for the rotor system of sliding bearing, and relates to the stability analysis, fault diagnosis and controlling technology of rotating machinery. Based on the energy conversion and conservation equation for bearing fluid-solid coupling motion, the present invention adopts the analysis method of vortex coupled excitation and non-linear coupled vibration displacement limit ring to control the effect of outside-system disturbance parameter, structural parameters and physical parameters on the sliding bearing subsystem effectively, to regulate the coupling kinematic characteristics of shaft neck rotation angular speed, shaft neck vortex angular speed and eccentricity varying speed reasonably and to ensure the energy conversion and conservation equation not smaller than 1.

Description

technical field [0001] The invention relates to stability analysis, fault diagnosis and control technology of rotating machinery. Background technique [0002] At present, with the development of rotating machinery in the direction of high speed, large span, and flexible light structure, the stability problem caused by the interaction between the oil film of the sliding bearing and the rotor has become increasingly prominent. solved puzzles. [0003] In engineering practice, there has not been a practical method and standard for the stability criterion of the sliding bearing rotor system in the field of rotating machinery, especially the relationship between the sliding bearing rotor whirl characteristics and stability is not clear, and it is impossible to determine the Effective diagnosis and control are carried out in order to ensure the stability of operation. Therefore, equipment damage accidents of rotating machinery often occur. Contents of the invention [0004] I...

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Application Information

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IPC IPC(8): G01M13/00G01M13/04
Inventor 杨金福刘占生于达仁王振鹏荆建平解永波
Owner 南京耦合动力工程技术有限公司
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