Hot rolling descaling pump speed increase box online monitoring diagnostic method

Abstract

The invention discloses a hot rolling descaling pump speed increase box online monitoring diagnostic method. The hot rolling descaling pump speed increase box online monitoring diagnostic method comprises the steps of arranging a vibration sensor and a temperature sensor used for monitoring vibration signals and temperature signals of a bearing on a bearing block in a descaling pump speed increasebox and collecting the signals of the vibration sensor and the temperature sensor and spraying process signals of a descaling pump; conducting spectral analysis and FFT transformation on the collected vibration sensor signals to obtain the total vibration value and vibration amplitude components; conducting signal reconstruction and data cleaning according to the original vibration signals, calculating the surface engagement state index and gear surface failure coefficient of speed increase box gears, comparing the surface engagement state index and the gear surface failure coefficient with preset alarm values and giving an alarm signal if the surface engagement state index and the gear surface failure coefficient exceed the preset alarm values; and monitoring the temperatures of all points of the bearing in the speed increase box and giving the corresponding alarm signals according to the signals collected by the temperature sensor. Through the hot rolling descaling pump speed increase box online monitoring diagnostic method, the descaling pump speed increase box is subjected to failure judgment and locating through multiple parameter characteristics to realize online early warning on the state of the descaling pump, and normal operation of the descaling pump speed increase box is ensured.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring and diagnosis of metallurgical machinery and equipment, in particular to an on-line monitoring and diagnosis method for a speed increaser box of a hot-rolled descaling pump. Background technique [0002] The hot rolling descaling pump is the key equipment of the hot rolling production line and the key process of the hot rolling product quality. This equipment provides high pressure water for the hot rolling production line to remove the oxidized impurities on the surface of the hot rolling plate and removes phosphorus. Operation will directly affect the product quality of the rolling line. [0003] At present, the management of descaling pumps is mainly based on personal experience to determine the state, and at the same time, offline detection instruments are used to record and analyze the characteristic quantities of the equipment, and offline precise diagnosis is implemented. Due to...

AI Technical Summary

Problems solved by technology

Due to the working characteristics of variable speed, variable load and variable working conditions of hot rolling equipment, when the descaling pump is not spraying water, the pump's backflow has a great influence on the vibration of the pump. Sometimes the vibration value of the pump is 5 to 7 times larger than that when the pump is turned on. This has an impact on the equipment vibration alarm judgment of the online monitoring system, it is difficult to accurately evaluate the operating status of the descaling pump equipment and perform fault diagnosis, and the offline post-analysis is very ineffective

Images