大型離心壓縮機遠程診斷關鍵技術研究
[Abstract]:Centrifugal compressor is widely used in the production of petroleum, chemical and other departments of large-scale rotating machinery equipment, to ensure the centrifugal compressor equipment utilization rate, for petroleum, chemical enterprises have an important significance. Because of the wide distribution of large centrifugal compressors, it is of great significance for the manufacturers to monitor the running state of the equipment in real time through the Internet, which is of great significance for the fault diagnosis in the later stage of the equipment. In order to accurately diagnose the fault of large centrifugal compressor, it is necessary to solve the key problems such as the effective collection, transmission, storage, processing and accurate judgment of fault data. Based on the study of data transmission characteristics and data storage mechanism of a remote diagnosis center, this paper presents a transmission method using breakpoint continuation function and a storage mechanism of sensitive monitoring method. It effectively solves the problems of data transmission integrity and excessive data storage. The haar,bior1.1,db4 wavelet is used to transform and compress the rotor unbalance signal. The three kinds of wavelets can reflect the characteristics of the fault signal after the transformation. Among them, the haar,bior1.1 wavelet achieves a good compression ratio for the rotor unbalance signal transform compression. Therefore, it is necessary to select the proper wavelet to transform and compress the fault diagnosis signal. Based on the study of typical faults and analysis methods of large centrifugal compressor and the actual situation of remote fault diagnosis, a remote monitoring and diagnosis system is developed by using LabVIEW software. The system includes data acquisition, remote transmission, filtering, data transformation, etc. Time domain analysis, frequency domain analysis and axis trajectory analysis module. The typical faults of rotor unbalance and oil film oscillation of large centrifugal compressor are analyzed and verified in production practice.
【學位授予單位】:沈陽工業(yè)大學
【學位級別】:碩士
【學位授予年份】:2012
【分類號】:TP274;TH452
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