CN218274229U - Shielding type semi-magnetic ring structure - Google Patents

Abstract

The utility model discloses a half magnetic ring structure of shielding formula, include: the inner-layer magnet and the two outer-layer semi-magnetic rings; the magnetic field direction of two outer half magnetic rings is the same, and outer half magnetic ring includes: the magnetic field generator comprises an outer shielding layer and an outer semi-magnetic ring magnet, wherein an opening is formed in the side part of the outer shielding layer; the outer half magnetic ring magnet is fixed in the outer shielding layer, a circular concave surface is arranged on the side part of the outer half magnetic ring magnet and is positioned at the opening, and the circular concave surfaces of the two outer half magnetic rings are opposite; the inlayer magnet is located between two arc concave surfaces, and the inlayer magnet includes: the inner shielding layer and the two half magnets are fixed in the inner shielding layer; the magnetic field directions of the two half magnets are the same; the gap between the inner layer magnet and the outer layer semi-magnetic ring forms a working air gap. The utility model discloses an airtight magnetic field has solved magnetic leakage problem of magnetic refrigeration test system, and magnetic field intensity and size can be adjusted moreover.

Description

Shielding type semi-magnetic ring structure

Technical Field

The utility model belongs to the technical field of the magnetic refrigeration, concretely relates to half magnetic ring structure of shielding formula.

Background

At present, the research of room temperature magnetic refrigerators mainly focuses on reciprocating type and rotating type, wherein a permanent magnetic field for a reciprocating type magnetic refrigerator is a partially closed magnetic circuit magnetic field, and a fully closed magnetic circuit magnetic field for a rotating type magnetic refrigerator is a fully closed magnetic circuit magnetic field.

Based on a novel rare earth phase change refrigeration engineering research method, the full-chain collaborative innovation research work from high-throughput calculation and material design, multi-field regulation and performance optimization, high-throughput preparation and representation to magnetic refrigerator operation is developed around the key scientific problem of improving the performance of rare earth magnetic refrigeration materials. In order to complete the work, a test platform for preparing the rare earth magnetic refrigeration material with high flux needs to be developed, and the test platform requires an adjustable magnetic field of 0-1T.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a half magnetic ring structure of shielded adopts airtight magnetic field, has solved magnetic refrigeration test system magnetic leakage problem, and magnetic field intensity can be adjusted with the size moreover.

In order to achieve the above purpose, the utility model uses the technical solution that:

shielded half magnetic ring structure includes: the inner-layer magnet and the two outer-layer semi-magnetic rings; the magnetic field direction of two outer half magnetic rings is the same, and outer half magnetic ring includes: the magnetic field generator comprises an outer shielding layer and an outer layer semi-magnetic ring magnet, wherein an opening is formed in the side part of the outer shielding layer; the outer half magnetic ring magnet is fixed in the outer shielding layer, a circular concave surface is arranged on the side part of the outer half magnetic ring magnet and is positioned at the opening, and the circular concave surfaces of the two outer half magnetic rings are opposite; the inlayer magnet is located between two arc concave surfaces, and the inlayer magnet includes: the inner shielding layer and the two half magnets are fixed in the inner shielding layer; the magnetic field directions of the two half magnets are the same, the half magnets are semicircular, the bottoms of the two half magnets are opposite, the bottom surfaces are planes, and the outer side surfaces are arc convex surfaces; and a working air gap is formed in a gap between the inner-layer magnet and the outer-layer semi-magnetic ring.

Furthermore, the overall shape of the outer-layer semi-magnetic ring is a cuboid, and the shape of the opening is circular.

Furthermore, semicircular clamping grooves are formed in the upper side and the lower side of the inner shielding layer respectively, and the two half magnets are fixed in the semicircular clamping grooves respectively.

The utility model discloses technical effect includes:

the utility model discloses a to current magnetic refrigeration measurement system provide, adopt airtight magnetic field, solved magnetic refrigeration test system magnetic leakage problem. The inner layer magnet and the two outer layer half magnetic rings form a closed magnetic field, and an outer shielding layer and an inner shielding layer are added, so that magnetic leakage is effectively avoided; the magnetic field that outer half magnetic ring structure encloses has multilayer, and the edge is the no magnetic leakage.

The size of the working space (working air gap) of the magnetic field of the utility model can be adjusted, and the size of the magnetic field intensity can be adjusted at 0-1T.

Drawings

Fig. 1 is a schematic diagram of a cross-sectional structure of a middle shielding type semi-magnetic ring structure of the present invention;

FIG. 2 is a schematic view of the magnetization directions of the inner magnet and the outer semi-magnetic ring in the present invention;

fig. 3 is a schematic structural view of the outer shield layer and the inner shield layer in the present invention;

fig. 4 is a schematic structural view of the outer half magnetic ring magnet and the half magnet of the present invention.

Detailed Description

The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.

As shown in fig. 1, it is a schematic diagram of a cross-sectional structure of a middle shielding type semi-magnetic ring structure of the present invention.

Shielded half magnetic ring structure includes: an inner layer magnet 2 and two outer layer semi-magnetic rings 1; the magnetization angles of the two outer half magnetic rings 1 are the same (the magnetic field directions are the same). The whole shape of outer semi-magnetic ring 1 is the cuboid, includes: the magnetic field generator comprises an outer shielding layer 11, an outer layer semi-magnetic ring magnet 12 and an opening formed in the side of the outer shielding layer 11; the shape of the opening is circular. The outer half magnetic ring magnet 12 is fixed in the outer shielding layer 11, a circular concave surface 13 is arranged on the side of the outer half magnetic ring magnet 12, and the circular concave surface 13 is positioned at the opening. The circular concave surfaces 12 of the two outer half magnetic rings 1 are opposite.

The inner layer magnet 2 is located between the two arc-shaped concave surfaces 12.

The inner layer magnet 2 includes: the magnetic shielding structure comprises an inner shielding layer 21 and two half magnets 22, wherein the two half magnets 22 are fixed in the inner shielding layer 21; the two half magnets 21 have the same magnetization angle (the same magnetic field direction), and the half magnets 21 have a semicircular shape. The two half magnets 22 are opposite at the bottom, the bottom surface is a plane, and the outer side surface is an arc convex surface 23.

A working air gap 3 is formed in a gap between the inner-layer magnet 2 and the outer-layer semi-magnetic ring 1, and the working air gap 3 is a magnetic field working space.

As shown in fig. 2, the magnetization direction of the inner layer magnet 2 and the outer layer semi-magnetic ring 1 in the present invention is schematically shown.

The magnetic field formed by the two outer half magnetic rings 1 has the characteristics of multiple layers and no magnetic leakage at the edge, and the size of the working air gap 3 and the size of the magnetic field can be adjusted by adjusting the distance between the two outer half magnetic rings 1. The working air gap 3 has a large internal magnetic field and a closed external magnetic field.

When the directions of the outer half magnetic ring 1 and the inner magnet 2 are opposite, the magnetic field strengths of the outer half magnetic ring 1 and the inner magnet 2 are mutually offset, and the magnetic field strength in the working air gap 3 continuously changes from 0T to 1T. When the magnetic field directions are the same, the magnetic field intensity in the working air gap 3 is the maximum; when the magnetic field direction is opposite, the magnetic field intensity in the working air gap 3 is 0.

As shown in fig. 3, it is a schematic structural diagram of the outer shielding layer 11 and the inner shielding layer 21 in the present invention. As shown in fig. 4, it is a schematic structural diagram of the outer layer half magnetic ring magnet 12 and the half magnet 22 in the present invention.

The outer shielding layer 11 and the inner shielding layer 21 are made of alloy, the thickness of the outer shielding layer is larger than 3mm, the outer half magnetic ring magnet 12 and the half magnet 22 are NdFeB magnets, the working point Ji of the NdFeB magnets is larger than or equal to 0.9Br, and the square degree of a demagnetization curve is close to 1.

The upper side and the lower side of the inner shielding layer 21 are respectively provided with a semicircular clamping groove, and the two half magnets 22 are respectively fixed in the semicircular clamping grooves according to the magnetization angle of 0 degree. Two outer shielding layers 11 are respectively fixed in the outer semi-magnetic ring magnet 12 according to the magnetization angle of 0 degree.

The use method of the shielding type half magnetic ring structure comprises the following specific steps:

step 1: the position of the outer semi-magnetic ring 1 is fixed, the outer wall of the inner shielding layer 21 of the inner magnet 2 is connected with a motor, a magnetic refrigeration bed is placed at a working air gap 3, and the position of the magnetic refrigeration bed is fixed; the initial positions of the magnetic field directions of the outer-layer semi-magnetic ring 1 and the inner-layer magnet 2 are the same, and the magnetization angles are 0 degree;

the magnetic refrigeration bed is connected with the cold accumulator and the radiator through pipelines.

Step 2: the motor drives the inner layer magnet 2 to rotate, the magnetization angle of the inner layer magnet 2 rotates from 0 degree to 180 degrees, the magnetic field strength in the working air gap 3 begins to weaken in the rotation process of the inner layer magnet 2, room temperature magnetic medium particles in the magnetic refrigeration bed are demagnetized, and cold energy generated in the demagnetization process is sent to the cold accumulator through heat exchange fluid in a pipeline;

when the magnetization angle of the inner layer magnet 2 is 180 degrees, the directions of the magnetic fields of the outer layer semi-magnetic ring 1 and the inner layer magnet 2 are opposite, and the magnetic field intensity in the working air gap 3 is 0.

And step 3: the magnetization angle of the inner layer magnet 2 rotates from 180 degrees to 360 degrees, the magnetic field strength in the working air gap 3 begins to be enhanced in the rotation process of the inner layer magnet 2, room temperature magnetic working medium particles in the magnetic refrigeration bed are excited, and heat generated in the excitation process is delivered to the radiator through heat exchange fluid in a pipeline.

When the magnetic field directions of the outer-layer half magnetic ring 1 and the inner-layer magnet 2 are the same, the magnetic field intensity in the working air gap 3 is the maximum, and is the superposition of the magnetic field intensities of the outer-layer half magnetic ring 1 and the inner-layer magnet 2.

The terminology used herein is for the purpose of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (3)

1. A shielded semi-magnetic ring structure, comprising: the inner-layer magnet and the two outer-layer semi-magnetic rings; the magnetic field direction of two outer half magnetic rings is the same, and outer half magnetic ring includes: the magnetic field generator comprises an outer shielding layer and an outer semi-magnetic ring magnet, wherein an opening is formed in the side part of the outer shielding layer; the outer-layer half magnetic ring magnet is fixed in the outer shielding layer, a circular concave surface is arranged on the side part of the outer-layer half magnetic ring magnet and is positioned at the opening, and the circular concave surfaces of the two outer-layer half magnetic rings are opposite; the inlayer magnet is located between two arc concave surfaces, and the inlayer magnet includes: the inner shielding layer and the two half magnets are fixed in the inner shielding layer; the magnetic field directions of the two half magnets are the same, the half magnets are semicircular, the bottoms of the two half magnets are opposite, the bottom surfaces are planes, and the outer side surfaces are arc convex surfaces; and a working air gap is formed in a gap between the inner-layer magnet and the outer-layer semi-magnetic ring.

2. The shielded magnetic half ring structure as claimed in claim 1, wherein the outer magnetic half ring has a rectangular parallelepiped overall shape and the opening has a circular shape.

3. The shielded magnetic semi-ring structure as claimed in claim 1, wherein the upper and lower sides of the inner shield layer are respectively provided with a semicircular slot, and the two semi-magnets are respectively fixed in the semicircular slots.

Images