Rotating machinery stability identification method, device, computer equipment and storage medium
A technology of rotating machinery and identification method, which is applied in the field of rotating machinery, can solve the problems of inability to realize online real-time identification of instability fault early warning, positive and negative precession mode mixing, and lack of installation of vibration exciter, etc., to achieve online Identification and real-time monitoring, early warning of instability faults, and the effect of improving accuracy
Active Publication Date: 2021-06-01
BEIJING UNIV OF CHEM TECH
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Problems solved by technology
However, this method needs to modify the structure of the rotor system, and the test is very inconvenient, and many in-service units do not have the conditions to install the vibration exciter
There is also an environmental excitation work mode identification method based on the stochastic subspace method to identify the modal parameters of the unit, but the positive and negative precession mode aliasing is serious, and the time required for a single identification is long, and online real-time identification cannot be realized Early warning of instability failure
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[0066] Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the drawings, it should be understood that the application may be embodied in various forms and should not be construed as limited to the embodiments set forth herein; A more thorough and complete understanding of the application. It should be understood that the drawings and embodiments of the present application are for exemplary purposes only, and are not intended to limit the protection scope of the present application.
[0067] It should be understood that the various steps described in the method implementations of the present application may be executed in different orders, and / or executed in parallel. Additionally, method embodiments may include additional steps and / or omit performing illustrated steps. The scope of the application is not limited in this respect.
[0068...
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The embodiment of the present invention discloses a method, device, computer equipment and storage medium for identifying the stability of a rotating machine, including: obtaining complex signals of vibration measuring planes, wherein the complex signals are the multiple vibration planes in the operating state of the rotating machine at multiple A collection of vibration response signals in preset directions; power spectrum decomposition is performed according to the complex signal to obtain the maximum singular value function of the power spectrum; two time-domain pulses based on the maximum singular value function are constructed based on the forward and reverse precession modes Attenuation signal; the time-domain pulse attenuation signal is processed to obtain the stability identification result. The technical solution of this application can save the cumbersome modification of the equipment due to the installation of the vibration exciter in the traditional way, avoid the introduction of theoretical test errors caused by changing the shafting structure, improve the identification accuracy and identification efficiency, and realize the online identification of the working modal parameters of the rotor system And real-time monitoring can achieve the purpose of early warning of instability and failure.
Description
technical field [0001] The present application relates to the technical field of rotating machinery, and in particular, the present application relates to a method, device, computer equipment and storage medium for identifying the stability of rotating machinery. Background technique [0002] Rotating power machinery is the key equipment in petrochemical, electric power and metallurgical industries. With the increase of power, pressure and flow requirements of the device, the rotor stability of the rotor system is facing great challenges. Accurate, stable and convenient testing of rotating power The mechanical working mode parameters are of great significance to verify the design capability of the device and improve the stable operation level of the device. By monitoring the working mode parameters of the rotating power machinery in real time, the change trend of the stability parameters (first-order positive precession damping ratio) can be obtained early, so as to achieve ...
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IPC IPC(8): G01M99/00G01H17/00G06K9/62
CPCG01M99/00G01H17/00G06F18/232
Inventor 李启行王维民
Owner BEIJING UNIV OF CHEM TECH