Early warning method for vibration deterioration of descaling pump in hot rolling production line
A rolling line and vibration value technology, applied in the field of detection and diagnosis, can solve problems such as false alarms, limited scope of applicable working conditions, and inability to realize early warnings, so as to improve accuracy and ensure normal operation
Active Publication Date: 2020-03-27
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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Problems solved by technology
The traditional vibration early warning method is to pre-set the alarm threshold in the monitoring system, and realize the alarm by comparing the vibration monitoring value with the alarm threshold; The system realizes early warning and lowers the alarm threshold, and the monitoring data collected in real time will continue to exceed the alarm threshold due to changes in working conditions, resulting in false alarms and affecting the normal operation of the hot rolling production line
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[0025] Example figure 1 As shown, the early warning method for the vibration degradation of the descaling pump of the hot rolling production line of the present invention comprises the following steps:
[0026] Step 1. Collect the vertical, horizontal and axial vibration waveform signals of the bearing bushes on both sides of the descaling pump through the online vibration monitoring system, and perform time domain and frequency domain analysis and calculation. At the same time, collect working condition parameters including descaling pump speed, inlet pressure, Outlet pressure;
[0027] Step 2. Select the outlet pressure of the descaling system of the hot rolling production line as the reference working condition for the vibration warning of the descaling pump. In order to provide an accurate warning, the online vibration monitoring system collects each outlet pressure value P of the descaling system of the hot rolling production line. i (i=1,2,...,m), where each outlet pres...
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The invention discloses an early warning method for vibration deterioration of a descaling pump in a hot rolling production line. The early warning method comprises the following steps of collecting avibration waveform signal of the descaling pump through an online vibration monitoring system, carrying out time domain and frequency domain analysis calculation, and collecting working condition parameters of the descaling pump; determining each outlet pressure value of a descaling system as a reference working condition; counting vibration value distribution areas of the descaling pump under different reference working conditions, and taking the upper limit value of each distribution area as an alarm threshold value; subdividing the vibration value distribution areas under each working condition and calculating the distribution probability; monitoring the vibration values and recording the quantity of the vibration values falling into the subdivision distribution areas under each reference working condition in the operation process of the descaling pump; periodically counting the number of monitored vibration values falling into the subdivision distribution areas; and judging that the vibration values of the descaling pump have a rising trend after certain conditions are met, and giving a vibration early warning by the online vibration monitoring system. According to the early warning method for vibration deterioration of the descaling pump in the hot rolling production line, early warning is carried out from the vibration threshold values and the vibration trend, so that the accuracy of the early warning is improved, and the normal operation of the hot rolling production line is ensured.
Description
technical field [0001] The invention relates to the technical field of detection and diagnosis, in particular to an early warning method for vibration degradation of a descaling pump in a hot rolling production line. Background technique [0002] The descaling pump unit is an important piece of equipment in the hot rolling production line. The vibration stability of the descaling pump unit is related to the normal operation of the entire hot rolling production line. In order to grasp the vibration status of the descaling pump unit in real time, accurate and timely Forewarning, this type of unit is equipped with an online vibration monitoring system. The traditional vibration early warning method is to pre-set the alarm threshold in the monitoring system, and realize the alarm by comparing the vibration monitoring value with the alarm threshold; The system realizes early warning and lowers the alarm threshold, and the monitoring data collected in real time will continue to e...
Claims
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Login to View More IPC IPC(8): F04B51/00F04B49/10
CPCF04B51/00F04B49/10
Inventor 孟坤荫
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE