Torsional vibration suppression device for rolling mill

Abstract

The invention provides a torsional vibration suppression device for rolling mill, belonging to the field of automatic control of a rolling mill. The torsional vibration suppression device comprises a motor current transformer, a motor rotation speed transformer, a torsional vibration suppressor and a roller-motor speed difference transformer. When a main transmission system of a continuous rolling mill has torsional vibration, the torsional vibration suppressor can simulate a compensating signal with the same frequency and amplitude as the torsional vibration and can send the compensating signal to an input end of a current adjustor in a main transmission control so that current of a motor generates vibration to suppress the torsional vibration of the main transmission system, the aim of suppressing the horizontal vibration of the rolling mill is reached, and chatter marks generated by a roller and band steel are suppressed further.

Description

technical field [0001] The invention relates to a rolling mill torsional vibration suppressing device, which belongs to the field of rolling mill automation control. Background technique [0002] Many continuous rolling mills at home and abroad frequently experience strong torsional vibration during the rolling process, which is manifested as coupled vibration such as horizontal vibration of the roll system, torsional vibration of the transmission system, and vertical vibration of the working stand during the rolling process, accompanied by strong noise. The rolling mill is a typical electromechanical-hydraulic complex system, and its dynamic state is closely related to the coupling effect between various subsystems. Its vibration mechanism is complex and its forms are diverse. The reason is not only because the mechanical structure and control system of the continuous rolling mill are very complicated, but also because there are many process parameters in the rolling proces...

AI Technical Summary

Problems solved by technology

At present, the methods of suppressing the vibration of the continuous rolling mill mainly focus on the two aspects of the process and the mechanical system. Methods such as adjusting the ratio of the emulsion, changing the gap between the rolls and changing the rolls are used, but the effect is not good.

Images