On-line monitoring method of cold rolled heating furnace roller running state

Abstract

The invention discloses an on-line monitoring method of cold rolled heating furnace roller running state. The method comprises the following steps: using a vibration sensor to collect vibration signalof the furnace roller and bearing, performing signal reconstruction to the vibration signal to obtain a vibration characteristic signal of the furnace roller and bearing, wherein the characteristic signal comprises the vibration frequency spectrum of each part of the bearing and the rotary frequency of the furnace roller in every frequency multiplication; calculating failure factor of each part of the bearing to compare with a set value and judge bearing failure; calculating total vibration value of the furnace roller, comparing the value with vibration amplitude values of the rotary frequency of the furnace roller in 1 and 2 frequency multiplication to judge whether the furnace roller is abnormal; building vibration waveform aggregate to the original vibration signal to obtain the fractal dimension of furnace roller vibration, obtaining the conclusion that the furnace roller is abnormal when the fractal dimension changes violently; and finally judging whether the furnace roller surface is over abrasion by comparing the basic furnace roller vibration amplitude value with the on-line furnace roller total vibration value.

Description

technical field [0001] The invention relates to an online monitoring method for the running state of furnace rolls in a cold rolling heating furnace. Background technique [0002] The furnace roll of the cold rolling heating furnace is one of the main equipments of the cold rolling production line. The furnace rollers of the heating furnace support and transport the thin slabs in the furnace. Once the furnace rollers fail, it may cause scratches on the surface of the thin slabs, or even broken strips and stacked steel, resulting in abnormal shutdown of the production line. [0003] The failure forms of the furnace roll of the cold rolling heating furnace are as follows: bearing failure, bending and downward deflection of the furnace roll, local bulging, cracking of the inner and outer rings, excessive wear, shedding of refractory materials on the surface of the furnace roll, and scaling in the inner cavity. For these failures of the furnace rollers, the methods of hearing a...

AI Technical Summary

Problems solved by technology

For these failures of the furnace rollers, the methods of hearing and touching are generally used, and a few of them are tested with simple instruments. The above methods cannot accurately monitor the operation status of the furnace rollers. Therefore, regular maintenance and after-the-fact maintenance are basically used. and after-the-fact maintenance to eliminate the defects of the furnace roller to ensure the normal operation of the equipment

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