On-line real-time monitoring method and device for failure of hydraulic motor of large-sized plate bending roll

Abstract

The invention discloses an on-line real-time monitoring method for failure of a hydraulic motor of a large-sized plate bending roll. The on-line real-time monitoring method comprises a hydraulic transmission part and a micro control part, wherein the hydraulic transmission part comprises a plurality of groups of high-pressure oil pumps and an oil pump motor, an electromagnetic overflow valve and a hydraulic motor thereof, two-way cartridge valves and a pipeline; the micro control part comprises an industrial personal computer, a PLC (Programmable Logic Controller), a pressure sensor, a bidirectional flow detector and a peripheral circuit; oil pressures and flow rates of oil inlet and outlet paths of the hydraulic motor are detected, and signals are transmitted to the PLC by the pressure sensor and the bidirectional flow detector, are then transmitted to the industrial personal computer by the PLC and are compared with standard parameter values in an industrial personal computer database; and an alarm is automatically sent out and the operation is stopped when the failure of the hydraulic motor is judged. According to the on-line real-time monitoring method, the problem that the failure of a transmission system of the hydraulic motor can only be judged afterwards and cannot be warned early is solved, so that the reliability of the plate bending roll is greatly improved and the life of the plate bending roll is greatly prolonged.

Description

technical field [0001] The invention relates to an online real-time detection method and device for hydraulic motor transmission faults, in particular to an online real-time detection method and device for hydraulic motor transmission faults of a large plate rolling machine. Background technique [0002] The main transmission device of the large-scale plate rolling machine is driven by a hydraulic motor. The following patent document: Application No. 200520124804.9 Hydraulic transmission device of large-scale plate rolling machine discloses a kind of prior art of hydraulic transmission of large-scale plate rolling machine, that is, multiple hydraulic The motor simultaneously drives the upper work roll as the main drive roll, and the rest of the work rolls are auxiliary work rolls; the other in the prior art is that each work roll is connected to a hydraulic motor for driving. The hydraulic control system provides power to the hydraulic motor. The hydraulic system consists of...

AI Technical Summary

Problems solved by technology

[0003] When the plate rolling machine is working, all the work rolls are loaded, and the hydraulic motors that provide torque for the plate rolling are frequently started and have impact loads. When one or more hydraulic motors fail, the faulty motor will not only fail If it becomes power, it will become a load instead, reducing the output power of the equipment

At the same time, it will cause serious damage to the transmission parts and cause the equipment to fail to operate.

In the existing technology, such faults can only be judged after the event, and online monitoring and early warning cannot be performed. How to monitor in real time under working conditions and effectively prevent faults is the key to the stable operation of the equipment, and it is also a difficult problem that has not been solved by the existing technology

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