3 results about "Compressor stall" patented technology

The invention discloses a compressor stall fault acoustic identification method and system, and relates to the field of engine state monitoring and fault diagnosis, and the method comprises the steps: collecting an acoustic signal in the operation process of a compressor; framing and windowing the acoustic signal; performing spectrum analysis and frequency band division on each frame of windowed signal to generate a frame energy vector; evaluating the importance of each frequency band based on a random forest out-of-bag replacement method, and screening out key frequency bands; constructing a triangular filter bank by taking each frequency in the key frequency set as a vertex, and performing neighborhood expansion when the spacing between adjacent frequencies exceeds a spacing threshold to obtain a reconstructed adaptive filter bank and a final filter energy feature vector; and inputting the final filter energy feature vector into a deep neural network model to obtain an identification result of whether the gas compressor is in a stall state or not. The method has the advantages that the equipment cost is reduced, the installation process is simplified, the stall feature pertinence analysis capability is improved, and the recognition result robustness is enhanced.

The application discloses a compressor stall failure acoustic identification method and system, and relates to the field of engine state monitoring and fault diagnosis. The method comprises the following steps: collecting acoustic signals in the operation process of the compressor; performing frame division and windowing processing on the acoustic signals; performing spectrum analysis and frequency band division on each frame of windowed signals to generate a frame energy vector; evaluating the importance of each frequency band based on the random forest out-of-bag replacement method to screen out key frequency bands; constructing a triangular filter bank with each frequency in the key frequency set as a vertex, and performing neighborhood expansion when the interval between adjacent frequencies exceeds a threshold interval to obtain a reconstructed adaptive filter bank and a final filter energy feature vector; and inputting the final filter energy feature vector into a deep neural network model to obtain an identification result of whether the compressor is in a stall state. The application has the advantages of reducing equipment cost, simplifying installation process, improving stall feature targeted analysis capability, and enhancing the robustness of the identification result.

The water spraying structure of the water vapor compressor, the water vapor compressor and the water spraying control method are used for the water vapor compressor, the water spraying structure of the water vapor compressor comprises a water supply system, a plurality of cartridge receiver water spraying hole assemblies and a hub water spraying hole assembly, and the cartridge receiver water spraying hole assemblies are arranged in the circumferential direction of a cartridge receiver; the hub water spraying hole assembly comprises a plurality of hub water spraying hole assemblies arranged in the circumferential direction of the hub and the same axial plane of the casing, the casing water spraying hole assembly comprises a plurality of casing water spraying holes formed in the air inlet flowing direction, and the casing water spraying holes are distributed in the front edge area, the middle area and the rear edge area of the blade. Along the same axial plane of the hub, the hub water spraying hole assembly comprises a plurality of hub water spraying holes formed in the air inlet flowing direction. And the water supply system is respectively connected with the casing water spraying holes and the hub water spraying holes. The water spraying structure of the water vapor compressor can destroy the blade tip leakage flow and inhibit the generation of stall surge of the water vapor compressor.