CN110514010B - An electromagnetic stirring holding furnace for scientific research - Google Patents

Abstract

The invention discloses an electromagnetic stirring heat preservation furnace for scientific research, which solves the problems of large volume and energy consumption waste of the electromagnetic stirring heat preservation furnace in the prior art, has reasonable integral structure arrangement and organically unified structure, and has the following beneficial effects: an electromagnetic stirring heat preservation furnace for scientific research comprises a furnace body, wherein an opening is arranged at the top of the furnace body and used for containing molten metal alloy solution; the coil is wound on the periphery of the furnace body in a layered manner; the magnetic yokes comprise a plurality of magnetic yokes, the magnetic yokes are uniformly arranged on the periphery of the furnace body and uniformly distributed around the coils, each magnetic yoke comprises a side plate and a plurality of tooth cores connected with the side plate, the thickness of the tooth cores in the middle is larger than that of the tooth cores on the upper side and the lower side from low to high.

Description

An electromagnetic stirring holding furnace for scientific research

Technical Field

The invention relates to the field of metal melting insulation furnaces, in particular to an electromagnetic stirring insulation furnace used for scientific research.

Background technique

Electromagnetic stirring technology controls the flow, heat transfer and solidification of molten metal alloy solution during stirring by quantitatively understanding the transmission of electromagnetic field in the medium, thereby reducing the superheat of the alloy, removing slag inclusions to expand the equiaxed crystal zone, reducing component segregation, reducing central porosity and central shrinkage, and greatly improving the quality of metal alloy after solidification. It has now been applied in industrial production. However, electromagnetic stirring technology has also encountered various problems during its use. For decades, domestic and foreign scholars have done a lot of numerical simulation research to solve these problems. The electromagnetic stirring insulation furnaces usually used in industry have large capacity and volume. There are no small electromagnetic stirring insulation furnaces suitable for scientific researchers. It is often time-consuming and labor-intensive to verify the process parameters obtained by simulation, and it causes energy waste.

Summary of the invention

In order to overcome the deficiencies of the prior art, the present invention provides an electromagnetic stirring insulation furnace for scientific research, which facilitates faster and more convenient correction of electromagnetic stirring process parameters, thereby better serving industrial production and improving the economic benefits of enterprises.

A specific scheme of an electromagnetic stirring holding furnace for scientific research is as follows:

An electromagnetic stirring holding furnace for scientific research, comprising:

A furnace body, wherein an opening is arranged at the top of the furnace body for containing the molten metal alloy solution;

The coil is wound in layers and arranged around the furnace body;

The yoke includes multiple yokes, which are evenly arranged on the circumference of the furnace body and evenly distributed around the coil. Each yoke includes a side plate and multiple tooth cores connected to the side plate. From low to high, the thickness of the middle tooth core is greater than the thickness of the tooth cores on the upper and lower sides.

The tooth core in the middle of the insulation furnace is thicker than the two sides, which can increase the magnetic conductivity of the yoke and reduce the waste of magnetic lines of force. The overall structure is more compact and lightweight, which is convenient for scientific researchers to conduct experiments, saves time for enterprise verification, and greatly saves raw materials and electricity consumption.

Furthermore, the magnetic yoke includes at least 4 of the tooth cores, and the thickness of the middle tooth core is greater than the thickness of the upper and lower tooth cores, so that most of the transmission of magnetic lines of force is concentrated on the two middle tooth cores, which can significantly improve the stirring efficiency under the same conditions.

Furthermore, in order to ensure the balance of the coil arrangement, the spacing heights formed between two adjacent tooth cores are the same.

Furthermore, the height of the coils in each layer is the same as the height of the interval formed between two adjacent tooth cores, thus ensuring that the number of turns and height of the coils in each layer are the same.

Furthermore, the side plate and the tooth core are an integrated structure, and the yoke is made of silicon steel.

Furthermore, in order to facilitate the arrangement of the coil, the furnace body is cylindrical, the coil is annular, and through the arrangement of the magnetic yoke, the distance between two adjacent coils is the same.

Furthermore, the tooth core at the uppermost side of the yoke is arranged higher than the top of the furnace body.

Furthermore, in order to ensure the setting of the coil, along the length direction of the yoke, the length of the tooth core is longer than the width of the side plate, the length of the tooth core is greater than 3 times the width of the side plate, the width of the tooth core is the same as the width of the side plate, the upper surface of the uppermost tooth core is flush with the top of the side plate, and the lower surface of the lowermost tooth core is flush with the bottom of the side plate.

Furthermore, the height of the furnace body is greater than the diameter of the furnace body, and the diameter of the furnace body is 150mm-200mm. Such a structural member facilitates the effective experimental work of scientific research personnel.

Compared with the prior art, the present invention has the following beneficial effects:

1) The present invention adopts the setting of the overall electromagnetic stirring insulation furnace, and the overall structure setting is more compact and light, which is convenient for scientific researchers to carry out experimental work, greatly facilitates scientific researchers to verify whether their process parameters are feasible, saves time for verification in enterprises, and greatly saves raw materials and electricity consumption.

2) The present invention can greatly increase the magnetic conductivity of the yoke and reduce the waste of magnetic lines of force by setting the two middle tooth cores to be thicker, thereby significantly improving the stirring efficiency under the same conditions.

3) The present invention facilitates the uniformity of coil arrangement by arranging the tooth cores at the same intervals, thereby ensuring the arrangement of the coils.

4) The present invention further ensures the arrangement of the coil by setting the tooth core length longer than the side plate width, and at the same time, can facilitate the manufacture of the yoke.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

FIG1 is a front view of a yoke in an embodiment of the present invention;

FIG2 is a top view of a yoke in an embodiment of the present invention;

FIG3 is a top view of an electromagnetic stirring holding furnace for scientific research according to an embodiment of the present invention;

In the figure: 1. side plate, 2. uppermost tooth core, 3. middle tooth core, 4. lowermost tooth core, 5. coil, 6. furnace body, 7. yoke.

Detailed ways

It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and/or combinations thereof.

As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present invention proposes an electromagnetic stirring insulation furnace for scientific research. The present invention is further explained below in conjunction with the drawings in the specification.

In a typical embodiment of the present invention, as shown in Figure 3, an electromagnetic stirring insulation furnace for scientific research includes a furnace body 6, a coil 5 and a yoke 7. A plurality of yokes 7 are provided on the circumferential side of the furnace body 6, and the coil 5 is layered and wound on the circumferential side of the furnace body 6. In this embodiment, a total of 6 yokes 7 are provided, and the 6 yokes 7 are evenly arranged on the circumferential side of the furnace body 6 and the coil 5; there is a gap between the coil 5, the yoke 7 and the furnace body 6.

As shown in Figures 1 and 2, the yoke 7 includes a side plate 1, and a plurality of tooth cores are provided on one side of the side plate 1. The tooth cores are vertically arranged with the side plate, and the tooth cores and the side plate 1 are an integral structure. The interval between two adjacent tooth cores is set at a set distance. In this embodiment, a total of 4 tooth cores are arranged, and the 4 tooth cores form a total of 3 intervals. The heights of the three intervals are the same, and the uppermost tooth core 2 of the yoke is arranged higher than the top of the furnace body 6. The coil 5 is in a ring shape, and the coil 5 is evenly arranged between every two tooth cores around the furnace body 6. The bottom of the furnace body 6 is flush with the bottom of the lowest coil 5, and the 6 yokes 7 are evenly distributed around the coil.

Each coil 5 has a cross-sectional area of ¹⁰ mm2, 150 turns, and a height of 44 mm. The coil height is the same as the spacing between two adjacent teeth, which is convenient for the regularity of coil arrangement. The coil 5 is fixed between the two teeth of each yoke from bottom to top.

Among them, in this embodiment, the yoke 7 is 230mm high and 70mm wide (the width of the side plate 1 is the same as the width of the tooth core), the width direction of the side plate 1 and the yoke are defined the same, the length of the yoke side plate is 40mm, the height of the upper and lower tooth cores is 20mm, the height of the middle tooth core 3 is slightly thicker, which is 29mm, the tooth core length is 125mm, and the interval between every two tooth cores is 44mm. The upper surface of the uppermost tooth core 2 is flush with the top of the side plate, and the lower surface of the lowermost tooth core 4 is flush with the bottom of the side plate.

The furnace body 6 is made of graphite material and has an appearance of a commonly used crucible shape, that is, the furnace body is cylindrical. A cover plate may or may not be provided at the top opening. The diameter of the furnace body 6 is 155 mm, the height is 190 mm, and the thickness is 15 mm. The yoke 7 is made of silicon steel. The height of the furnace body 6 is less than the height of the yoke 7, which is convenient for the installation of the yoke 7.

The present embodiment provides an electromagnetic stirring insulation furnace for scientific research, in which a molten metal alloy solution is placed in the furnace body. When a low-frequency current is passed through the coil, a traveling wave magnetic field is generated. The magnetic field passes through the bottom of the furnace and acts on the molten metal alloy solution, generating an induced potential and current in the solution. The induced current and the magnetic field generate an electromagnetic force, thereby promoting the directional flow of the solution and playing a stirring role.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (9)

1. An electromagnetic stirring heat preservation stove for scientific research, which is characterized by comprising:

The top of the furnace body is provided with an opening for containing molten metal alloy solution;

The coil is wound on the periphery of the furnace body in a layered manner;

The magnetic yokes comprise a plurality of magnetic yokes which are uniformly arranged on the periphery of the furnace body and uniformly distributed around the coil, each magnetic yoke comprises a side plate and a plurality of tooth cores connected with the side plate, and the thickness of the tooth core in the middle is larger than that of the tooth cores on the upper side and the lower side from low to high;

In order to guarantee the setting of coil, along the length direction of yoke, the length of tooth core is longer than the width of curb plate, the length of tooth core is greater than 3 times of curb plate width, and the width of tooth core is the same with the width of curb plate, and the tooth core upper surface of the top flushes with the curb plate top, and the tooth core lower surface of the bottom flush with the curb plate bottom.

2. The electromagnetic stirring holding furnace for scientific research of claim 1, wherein the magnetic yoke comprises at least 4 tooth cores, and the thickness of the middle tooth core is larger than that of the tooth cores at the upper side and the lower side.

3. An electromagnetic stirring holding furnace for scientific research according to claim 1, wherein the height of the interval formed between two adjacent tooth cores is the same.

4. The electromagnetic stirring holding furnace for scientific research of claim 1, wherein the side plates and the tooth core are integrated into a structural member.

5. The electromagnetic stirring holding furnace for scientific research of claim 1, wherein the furnace body is cylindrical, and the coil is annular.

6. The electromagnetic stirring holding furnace for scientific research according to claim 1, wherein the height of each layer of the coil is the same as the height of the interval formed between two adjacent tooth cores.

7. The electromagnetic stirring heat preservation furnace for scientific research of claim 1, wherein the uppermost tooth core of the magnetic yoke is higher than the top of the furnace body.

8. The electromagnetic stirring holding furnace for scientific research of claim 1, wherein the length of the tooth core is longer than the width of the side plate.

9. The electromagnetic stirring heat preservation furnace for scientific research according to claim 1, wherein the height of the furnace body is larger than the diameter of the furnace body, and the diameter of the furnace body is 150mm-200mm.