Iron-core shielding roller type electromagnetic stirring sensor

Abstract

The invention relates to an iron-core shielding roller type electromagnetic stirring sensor, which comprises an iron core and coil windings, wherein the iron core is a combined iron core, the coil windings are wound around the outer circumference of the combined iron core in sections at intervals, the intervals between the combined iron core and the coil windings are arranged in a hollow roller, the combined iron core and the coil windings are fixed by iron core shaft ends at two ends, and the combined iron core, the coil windings and the hollow roller correspondingly rotate to move; the combined iron core comprises the iron core, U-shaped shielding rings and O-shaped shielding rings, the iron core consists a main iron core and a secondary iron core, the U-shaped shielding rings annularlycover the outer side of the secondary iron core and the inner side of each coil winding, and the O-shaped shielding rings are arranged at two ends of the iron core and the coil windings, wherein magnetic poles are arranged among all coil winding groups wound on the main iron core. The invention has the advantages of improving the effect of a roller type electromagnetic stirring device and increasing the magnetic conduction area of the iron core, the strength of a magnetic field and the electromagnetic stirring force, and also solves the problems that the stirring force is not enough, the effect is low, the efficiency is low, the electromagnetic stirring force is small, the magnetic leakage of a nonworking area is large.

Description

technical field [0001] The invention relates to an electromagnetic stirrer in the technical field of metallurgical slab continuous casting process equipment, in particular to an iron core shielding roller type electromagnetic stirring inductor. Background technique [0002] At present, there are various slab S-EMS structures, mainly including: box type electromagnetic stirring device, magnetic pole insertion type electromagnetic stirring device and roller type electromagnetic stirring device. The roller electromagnetic stirring device has a special structure. It uses a specially designed and compact electromagnetic induction coil (traveling wave magnetic field sensor) installed in a hollow roller (similar to the supporting guide roller of the slab continuous casting machine) to The liquid core inside the billet shell is electromagnetically stirred. In recent years, the roller electromagnetic stirring device is more and more used in the slab S-EMS because of its convenient i...

AI Technical Summary

Problems solved by technology

But the existing roller-type electromagnetic stirring device has the following defects and deficiencies: 1. The magnetic shielding ring is set on the outer layer of the coil winding. Because of the thickness of the magnetic shielding layer outside the coil, this will inevitably occur in the same space (compared with no shielding layer). It is necessary to greatly reduce the cross-sectional area of ​​the coil winding and the iron core, that is, greatly reduce the number of ampere turns and the magnetic conduction area of ​​the roller electromagnetic stirring device, and also reduce the electromagnetic stirring force; 2. The roller electromagnetic stirring device without shielding layer Stirring device, the magnetic field is evenly distributed along the radial direction of the iron core, the magnetic flux leakage is large, the working magnetic field is small, the proportion of useful work is small, and the energy consumption is also inefficient

3. The coil is full-wound cylindrical iron core. The coil is equivalent to the magnetic shielding layer. While improving the utilization rate of the winding space, it shields a part of the effective working magnetic field, making it enclosed in the core and causing loss, and the efficiency of the active magnetic field is low.

Images