Multi-waveform electromagnetic excitation device of continuous casting crystallizer

Abstract

The invention discloses a multi-waveform electromagnetic excitation device of a continuous casting crystallizer, wherein a crystallizer extension end (2) of the multi-waveform electromagnetic excitation device is fixedly arranged on a movable frame (4); the movable frame is arranged at a fixing frame (6) through an elastic support assembly; the upper side and the lower side of the periphery of the movable frame are equipped with a plurality of armature iron mechanisms (5); a plurality of groups of coupled suspension electromagnets (8) are arranged on the fixing frame; the suspension electromagnets are vertically arranged and vertically correspond to one armature iron mechanism; the suspension electromagnets are connected with a power amplifier (12) through cables; a computer control system (13) is connected with the power amplifier to differentially control the suspension electromagnets in couples; and a guide-plate spring (10) is arranged between the side face of the movable frame and the fixing frame to ensure that the crystallizer (1) fixedly arranged on the movable frame can be vibrated in an arc shape according to a continuous casting arc line. In the invention, the coupled differential suspension electromagnets are controlled through the computer control system; the forced vibration of arbitrary waveforms of the crystallizer can be realized; and the vibration precision of the continuous casting crystallizer can be enhanced.

Description

technical field [0001] The invention relates to a vibrating device for a continuous casting crystallizer, in particular to an electromagnetic vibrating device for a continuous casting crystallizer. Background technique [0002] As we all know, when the molten steel solidifies in continuous casting, it will stick to the inner wall of the crystallizer and tear the initial billet shell. In order to avoid this billet shell sticking phenomenon, modern continuous casting machines are equipped with mold vibration devices. At present, there are mainly two excitation methods for common vibration devices. One is to use a mechanical eccentric wheel mechanism driven by a motor to excite vibration. This excitation method can only generate a single vibration waveform of sine waves for the crystallizer vibration device. With the development of high-efficiency continuous casting and high-surface-quality continuous casting, a second non-sinusoidal mold excitation method using servo hydraulic...

AI Technical Summary

Problems solved by technology

The first kind of mechanical eccentric wheel excitation device has a relatively simple structure and relatively low maintenance cost, but its vibration waveform can only generate sine waves in general, which has a certain limiting effect on further improving continuous casting production efficiency and improving the quality of casting slab vibration marks. It will gradually be replaced; the second type of servo hydraulic vibration excitation device can easily generate various required non-sinusoidal waveforms, which is beneficial to continuous casting. At present, it has begun to be widely used, but the system of the vibration excitation device is complicated, and the hydraulic station, hydraulic pressure The service life, maintenance cost and floor space of pipelines and hydraulic components are very large. For example, the main hydraulic cylinder and servo valve of the billet hydraulic servo system of an enterprise will be replaced even in a few months, and the maintenance cost is high.

[0004] Chinese patent CN200420082329.9 discloses a crystallizer vibration device. Its core technical feature is to install the crystallizer on a supporting spring and use an electromagnetic exciter to drive the crystallizer to vibrate. This technology avoids the traditional mechanical eccentric wheel drive And the lack of servo hydraulic drive, but this technology mainly generates forced vibration through the support spring under the action of electromagnetic force. The electromagnetic exciter only changes the vibration balance position of the support spring, and the vibration waveform can only produce sinusoidal waveforms, not Non-sinusoidal waveform, i.e. the waveform asymmetry requirement that the rise time of crystallizer vibration is longer than the fall time cannot be achieved

The vibration of the continuous casting crystallizer belongs to the vibration of large inertia, and the rising time of the vibration is required to be longer than the falling time, that is, the velocity waveform maintains a constant speed in the rising section. The existing electromagnetic exciter cannot realize this function alone, even if it is combined. can not achieve

Images