Thin rare earth cobalt magnetic steel module

Abstract

The utility model provides a thin rare earth cobalt magnetic steel module, which comprises a base, a housing buckled on the base and sheet-shaped magnetic steel blocks, the magnetic steel blocks are made of rare earth cobalt, the base and the housing define an accommodating space, a plurality of the magnetic steel blocks are arranged in the accommodating space in parallel, and the magnetic steel blocks are arranged in the accommodating space. The end, away from the housing, of the base is of an arc-shaped structure attached to a rotor supporting ring. The magnetic steel block and the overall size are small, and the magnetic valve is not prone to cracks during production and casting; the magnetic steel block is wrapped in the base and the housing, so that the safety is high; under the condition that the performance requirement is met, the air gap between the stator and the rotor can be increased from 2.1 mm to 5 mm; through optimization design and material selection, light weight and compactness of the magnetic steel module are realized, and the overall weight and size of the motor are reduced. The lower end of the base is designed to be arc-shaped, so that the base can be attached to a rotor supporting ring conveniently and is more stable after being installed.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power plants, and more specifically to a thin rare earth cobalt magnetic steel module. Background Art

[0002] At present, most of the million-class nuclear power generators in nuclear power plants use brushless excitation, and the brushless exciter is equipped with an AlNiCo outer rotor permanent magnet machine.

[0003] as follows Figure 1 As shown, the existing AlNiCo outer rotor permanent magnet machine uses AlNiCo magnets, which are fixed on the rotor support ring by a pressing plate.

[0004] Due to the large size and weight of AlNiCo magnets, cracks are more likely to appear during casting, resulting in low yields and high production costs. Furthermore, the AlNiCo installation method results in a small air gap between the stator and rotor in the outer rotor permanent magnet motor, exposing the magnets. During operation, the presence of foreign matter or the presence of a scavenged bore can easily cause the magnets to rub, posing a risk to the safe operation of the generator set. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a thin rare earth cobalt magnet module in response to the above-mentioned defects of the prior art, aiming to achieve lightweight and compact magnet module through optimized design, and improve assembly stability and magnetic performance.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a thin rare earth cobalt magnet module, including a base, a cover shell fastened to the base and a sheet-shaped magnet block, the magnet block is made of rare earth cobalt, the base and the cover shell define a storage space, a plurality of the magnet blocks are arranged side by side in the storage space, and the end of the base away from the cover shell is an arc-shaped structure that fits with the rotor support ring.

[0007] Furthermore, it is preferred that the base has a stepped structure around its periphery, and the cover is buckled onto the steps.

[0008] Furthermore, preferably, the gaps between the base, the cover and the magnetic steel block are filled with filling glue.

[0009] Furthermore, it is preferred that a glue filling process hole penetrating through the base is opened at one end of the base away from the cover shell.

[0010] Furthermore, it is preferred that the glue filling process holes are arranged diagonally.

[0011] Furthermore, preferably, a fixing hole is formed at one end of the base away from the cover, and the thin rare earth cobalt magnetic steel module further comprises a fixing member for fixing the module to the rotor support ring, and the fixing member passes through the rotor support ring and is connected to the fixing hole.

[0012] Furthermore, it is preferred that a first auxiliary hole is formed at one end of the base away from the cover shell, and the first auxiliary hole is a blind hole.

[0013] Furthermore, it is preferred that a second auxiliary hole is provided on the front side of the base.

[0014] Furthermore, it is preferred that the cover is a stainless steel cover, and the magnetic steel block is a rectangular parallelepiped structure.

[0015] Furthermore, the cross-sectional thickness of the magnetic steel block is preferably 8.3-8.8 mm, the width is 45-55 mm, and the length is 84-85 mm.

[0016] The thin rare earth cobalt magnet module of the present invention has at least the following effects:

[0017] The small size of the magnetic block and its overall size makes it less likely to crack during the production and casting of the magnetic valve. Furthermore, the magnetic block is enclosed within the base and housing, providing enhanced safety. While ensuring that performance requirements are met, the air gap between the stator and rotor can be increased from 2.1mm to 5mm. Through optimized design and material selection, the magnetic module has been made lightweight and compact, reducing the overall weight and volume of the motor. The magnetic block, made of rare earth cobalt, has excellent magnetic properties, improving the motor's operating efficiency and output power. The lower end of the base is designed to be arc-shaped to facilitate contact with the rotor support ring, providing greater stability after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of an AlNiCo magnet block in the prior art;

[0019] Figure 2 This is a schematic structural diagram of the thin rare earth cobalt magnetic steel module of the present invention;

[0020] Figure 3 yes Figure 2 Bottom view of

[0021] Figure 4 yes Figure 2 sectional view of . DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0025] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0026] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0027] like Figure 2-Figure 4 As shown, the present invention provides a thin rare earth cobalt magnet module, comprising a base 10, a cover 20 buckled on the base 10, and a sheet-shaped magnetic steel block 30. The magnetic steel block 30 is made of rare earth cobalt. The base 10 and the cover 20 define a receiving space. A plurality of the magnetic steel blocks 30 are arranged side by side in the receiving space. The end of the base 10 away from the cover 20 is an arc-shaped structure that fits with the rotor support ring.

[0028] The base 10 is an elongated structure that facilitates the arrangement of several magnetic steel blocks 30. The end of the base 10 away from the housing 20 is designed as an arc-shaped structure that fits with the rotor support ring, facilitating the installation and positioning of the module. The fit with the rotor support ring provides a more stable installation and prevents it from falling off due to a loose fit.

[0029] Made of rare earth cobalt, it has a high magnetic energy product and good thermal stability. The magnetic steel blocks 30 are arranged in a sheet-like form in the accommodation space formed by the base 10 and the cover 20. The cross-sectional thickness, width and length of the magnetic steel blocks 30 are precisely designed to achieve optimal magnetic performance and structural strength. Preferably, the cross-sectional thickness of the magnetic steel blocks 30 is 8.3-8.8mm, the width is 45-55mm, and the length is 84-85mm. This size is designed to match the dimensions of other components of the original equipment, and the performance also meets the requirements of the original aluminum nickel cobalt magnet. Furthermore, it is more preferred that the cross-sectional thickness of the magnetic steel blocks 30 is 8.5mm, the width is 50mm, and the length is 84.6mm.

[0030] In one embodiment, the base 10 is surrounded by a stepped structure 11, which facilitates the snapping of the cover 20 onto the steps, thereby providing protection for the magnetic steel block 30 and enhancing safety. After the cover 20 is snapped onto the base 10, it can be fixed by laser welding to form a magnetic steel module.

[0031] In one specific embodiment, the gaps between the base 10, the housing 20, and the magnetic blocks 30 are filled with glue to improve the overall stability and sealing of the module. The magnetic blocks 30 are arranged and fixed to the base 10 with glue, and the housing 20 is snapped onto the base 10. A glue injection hole 12 is provided at the end of the base 10 away from the housing 20, extending through the base 10. This hole is used to inject glue and secure the magnetic module.

[0032] In a preferred embodiment, the glue pouring holes 12 are arranged diagonally to facilitate the injection and uniform distribution of the filling glue, and can facilitate the discharge of air inside the magnetic steel module during glue pouring, thereby ensuring the glue pouring effect.

[0033] In a specific embodiment, a fixing hole 13 is defined at one end of the base 10 away from the housing 20. The thin rare earth cobalt magnet module also includes a fixing member for securing the module to the rotor support ring. The fixing member passes through the rotor support ring and connects to the fixing hole 13. The fixing hole 13 can be a blind hole that does not penetrate the base 10. The fixing hole 13 cooperates with the fixing member to firmly secure the module to the rotor support ring, ensuring the module's stability during high-speed rotation. For example, the fixing hole 13 is a screw hole with a diameter of Φ4 mm, and the fixing member is a screw. Multiple fixing holes 13 can be evenly distributed to ensure that the entire magnet module is securely fixed to the rotor support ring.

[0034] In one specific embodiment, a first auxiliary hole 14 is defined at one end of the base 10 away from the housing 20. The first auxiliary hole 14 is a blind hole that does not penetrate the base 10. The first auxiliary hole 14 is used to assist in positioning the magnetic module during installation and to overcome the magnetic adhesion to lift the magnetic module when it is removed. For example, the first auxiliary hole 14 may be a Φ2 mm diameter screw hole.

[0035] In a specific embodiment, a second auxiliary hole 15 is provided on the front side of the base 10. The second auxiliary hole 15 is a threaded hole that can be used to push the magnetic steel module into the rotor support ring during installation, and can also be used to pull the magnetic steel module out of the rotor support ring during disassembly.

[0036] In a specific embodiment, the cover 20 is made of stainless steel to improve the overall corrosion resistance and mechanical strength. The magnetic steel block 30 is a rectangular parallelepiped structure.

[0037] The magnetic steel module of the utility model is based on the original 5800kW exciter structure, and the magnetic steel material is changed from aluminum nickel cobalt to rare earth cobalt. While ensuring the equivalent performance of the permanent magnet machine and the interface size between the original fan L-shaped ring and the permanent magnet machine rotor remains unchanged, the stator and rotor air gap is increased from 2.1mm to 5mm. The magnetic steel module type is used to add a protective cover outside the magnetic steel. The design scheme is feasible and reliable.

[0038] The thin rare earth cobalt magnet module of the present invention has at least the following effects:

[0039] 1. Lightweight and compact: By optimizing the design and material selection, the magnetic steel module is made lightweight and compact, reducing the overall weight and volume of the motor.

[0040] 2. Improve magnetic properties: The magnetic steel block made of rare earth cobalt material has excellent magnetic properties, which improves the operating efficiency and output power of the motor.

[0041] 3. Enhanced stability: The filling of the filling glue and the connection of the fixing parts enhance the overall stability of the module, reducing the risk of performance degradation and damage caused by vibration and impact.

[0042] 4. Improve processing efficiency: The stepped structure of the base and cover, the design of the glue filling process holes and auxiliary holes simplify the processing and assembly process and improve production efficiency.

[0043] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent variations and modifications within the scope of the claims of the present invention are intended to be covered by the claims of the present invention.

Claims

1. A thin rare earth cobalt magnet module, characterized in that: It includes a base, a cover that is buckled on the base, and a sheet-shaped magnetic steel block. The magnetic steel block is made of rare earth cobalt. The base and the cover define a storage space. Several magnetic steel blocks are arranged side by side in the storage space. The end of the base away from the cover is an arc-shaped structure that fits with the rotor support ring.

2. The thin rare earth cobalt magnet module according to claim 1, characterized in that: The base is formed into a stepped structure around its periphery, and the cover is buckled on the steps.

3. The thin rare earth cobalt magnet module according to claim 1, characterized in that: The gaps between the base, the cover and the magnetic steel block are filled with filling glue.

4. The thin rare earth cobalt magnet module according to claim 3, characterized in that: A glue filling process hole penetrating through the base is formed at one end of the base away from the cover shell.

5. The thin rare earth cobalt magnet module according to claim 4, characterized in that: The glue pouring process holes are arranged diagonally.

6. The thin rare earth cobalt magnet module according to claim 1, characterized in that: A fixing hole is formed at one end of the base away from the cover. The thin rare earth cobalt magnetic steel module further comprises a fixing member for fixing the module to the rotor support ring. The fixing member passes through the rotor support ring and is connected to the fixing hole.

7. The thin rare earth cobalt magnet module according to claim 1, characterized in that: A first auxiliary hole is formed at one end of the base away from the cover shell, and the first auxiliary hole is a blind hole.

8. The thin rare earth cobalt magnet module according to claim 1, characterized in that: A second auxiliary hole is provided on the front side of the base.

9. The thin rare earth cobalt magnet module according to claim 1, characterized in that: The cover is a stainless steel cover, and the magnetic steel block is a rectangular parallelepiped structure.

10. The thin rare earth cobalt magnet module according to claim 1, characterized in that: The cross-sectional thickness of the magnetic steel block is 8.3-8.8 mm, the width is 45-55 mm, and the length is 84-85 mm.

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