Fusion diagnosing method of centrifugal pump vibration accidents and vibration signals sampling device

A technology of vibration signal and diagnosis method, which is applied in the field of vibration signal acquisition device and centrifugal pump vibration fault fusion diagnosis, can solve the problem of inability to accurately diagnose centrifugal pump faults, inability to truly and effectively comprehensively collect signals and accurately diagnose centrifugal pumps. Consider issues such as sensor multi-information resources

Inactive Publication Date: 2007-02-28
NORTHEAST DIANLI UNIVERSITY
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Problems solved by technology

[0003] The traditional signal feature extraction mostly uses the spectrum analysis method, which only uses Fourier transform to analyze the fault of the centrifugal pump from the power spectrum. It only analyzes the frequency domain, and does not analyze it from the time domain and frequency domain. It cannot fully reflect the characteristics of the fault. Therefore, it is impossible to accurately diagnose the fault of the centrifugal p

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  • Fusion diagnosing method of centrifugal pump vibration accidents and vibration signals sampling device
  • Fusion diagnosing method of centrifugal pump vibration accidents and vibration signals sampling device
  • Fusion diagnosing method of centrifugal pump vibration accidents and vibration signals sampling device

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Embodiment Construction

[0058] The centrifugal pump vibration signal acquisition device will be described in detail below using the accompanying drawings and examples.

[0059] Referring to FIGS. 2-6 , the centrifugal pump vibration signal collection device includes an experimental device 26 , a data collector 18 , a computer 20 and a dongle 21 . The structure of the experimental device 26 is that the motor 1 and the centrifugal pump 7 are fixed on the foundation 25, the shaft 4 of the motor 1 is connected with the pump shaft 14 of the centrifugal pump 7 through a shaft coupling 15, and the shaft coupling 15 is provided with The flange 16 is fixed with a bracket 13 on the foundation 25, and the radial vertical displacement sensor 10, the radial horizontal displacement sensor 11 and the axial displacement sensor 12 for collecting the vibration signal of the centrifugal pump 7 are arranged on the bracket 13, and the centrifugal pump 7 Acceleration sensor 3 is installed on the pump bearing seat of the p...

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Abstract

The invention relates to an eccentric pump vibration accidence fusion diagnose method and relative vibration signal collector, wherein said invention is characterized in that: it uses the eccentric pump vibration signal collector to collect the normal state, the quantity imbalance, asymmetry rotate and loose base of eccentric pump; uses wavelet decomposition and reconstruction to extract the character of vibration signal; and inputs the character vectors into sub fuzzy neural networks I and II; to be treated and replace the relation factor matched with sensor signal function; the whole fuzzy neural network comprises data fuzzy layer, input layer, hidden layer and output layer; uses D-S theory to obtain the fused signal function distribution, realize the fusion diagnose on normal state, quantity imbalance, asymmetry rotate and loose base. The invention has simple structure and high effect.

Description

technical field [0001] The invention relates to the field of fault diagnosis, and relates to a centrifugal pump vibration fault fusion diagnosis method and a vibration signal acquisition device. Background technique [0002] Equipment fault diagnosis technology is a new marginal comprehensive engineering discipline gradually formed in the past 20 years. Equipment fault diagnosis technology is one of the basic measures to ensure the safe operation of equipment. It can make early forecasts for the development of equipment faults and make judgments on the causes of faults. However, equipment diagnosis technology starts with fault feature quantities, which are determined by According to the analysis of the original signal collected, the follow-up work of diagnosis is only meaningful if the signal reflecting the actual state of the equipment is collected. Therefore, signal acquisition technology is one of the foundations of equipment diagnosis. [0003] The traditional signal fe...

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Application Information

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IPC IPC(8): G01M13/00G01M7/02F04B51/00
Inventor 周云龙洪君赵鹏孙斌张毅洪文鹏
Owner NORTHEAST DIANLI UNIVERSITY
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