On-line diagnosis method for air leakage fault of annular cooler based on unilateral detection method of spectral characteristics

Abstract

The invention discloses an on-line ring cooling machine air leakage fault diagnosis method based on a spectrum feature unilateral detection method. Sound signal collectors are arranged at a ring cooling machine trolley and a ring cooling draught fan. The method comprises the following steps that step 1, trolley sound data and draught fan sound data under normal operating conditions are collected to obtain a trolley sound sample and a draught fan sound sample; step 2, a normal sample set is obtained by using the trolley sound sample and the draught fan sound sample, and a normal sound model isestablished by using the normal sample set; and step 3, a current trolley sound sample and a current ring cooling machine sound sample are collected in real time to obtain an on-line sound sample, theon-line sound sample is compared with the normal sound model,whether the on-line sound sample is abnormal is judged based on comparison results, if yes, the on-line sound sample is compared with an air leakage sound model in an air leakage fault database, and whether the on-line sound sample belongs to a defined air leakage failure is judged to determine whether the air leakage fault occurs in the ring cooling machine.

Description

technical field [0001] The invention relates to an online diagnosis method for an air leakage fault of an annular cooler based on a frequency spectrum feature unilateral detection method. Background technique [0002] The annular cooler is a large-scale equipment used for material cooling. Its main working principle is to load high-temperature materials through the trolley and drive on the circular track. There is a bellows at the bottom of the trolley to blow air inside the trolley, and the high-temperature materials will be transported through the air. cool down. Around the outside of the ring of the ring cooler, several blowers will be set up according to the air volume demand to provide air source for the cooling process. [0003] The small granular materials to be cooled are evenly distributed in the form of thick material layers on the ring cooler. In order to ensure sufficient cooling of the materials, the ring cooler will install a bellows under the trolley and conn...

AI Technical Summary

Problems solved by technology

Due to the sealing structure of the annular cooler and the maintenance problems of long-term use, air leakage will occur during the cooling production process, resulting in insufficient cooling and waste of blower energy. In the case of serious air leakage, the discharge temperature of the annular cooler may even be too high Production Accidents Burning Conveyor Belts

Due to the complex structure of the ring cooler and its attached bellows, air pipes, valves, etc., and working at high temperature, the detection of air leakage rate has always lacked effective means

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