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High-temperature-resistant and hydrogen-resistant samarium-cobalt permanent magnet motor

A permanent magnet motor, high temperature resistant technology, applied in the direction of permanent magnets, manufacturing motor generators, magnetic circuits characterized by magnetic materials, etc., can solve the problems of permanent magnet failure, permanent magnet motor can not be used, etc., to achieve increased density , Hinder the entry of hydrogen, improve the effect of intergranular continuity

Active Publication Date: 2021-10-22
HANGZHOU PERMANENT MAGNET GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problem that the permanent magnet in the samarium-cobalt permanent magnet motor will fail in the hydrogen environment, especially for the problem that the permanent magnet is pulverized in the high-temperature, high-pressure pure hydrogen environment and the motor cannot be used, the invention provides a durable High temperature anti-hydrogen samarium cobalt permanent magnet motor

Method used

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  • High-temperature-resistant and hydrogen-resistant samarium-cobalt permanent magnet motor

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preparation example Construction

[0058] Its expression (not including coating) of described samarium cobalt permanent magnet is: Sm (Co 1-x-y-v Fe x Cu y Zr v ) z , wherein x=0.18~0.26, y=0.14~0.2, v=0.01~0.03, z=7.0~7.5; z is the atomic ratio of transition group elements Co, Fe, Cu, Zr and rare earth element Sm, and its preparation method includes The following steps:

[0059] (1) According to the ratio of each element, the raw materials are melted in an inert environment to obtain alloy ingots or slabs.

[0060] (2) Crushing the obtained ingot or cast sheet under a nitrogen environment, and then jet milling under an inert environment to obtain samarium cobalt powder.

[0061] (3) The obtained samarium-cobalt powder is oriented and formed in an inert environment and a 1-5T magnetic field, and then cold isostatically pressed at 180-230MPa to obtain a samarium-cobalt magnet green body with a particle size of 3.8-4.5 μm.

[0062] (4) Sinter the samarium-cobalt magnet green body in an inert environment (11...

Embodiment 1

[0065] Such as figure 1 As shown, a high temperature and hydrogen resistant samarium cobalt permanent magnet motor includes:

[0066] Rotor body 1 (size is Φ145mm*180mm);

[0067] A rotor spline shaft 2 assembled at the axis of the rotor body;

[0068] 48 tile-shaped samarium-cobalt permanent magnets 3 embedded in the rotor body (the size of each piece is R31.94mm*R50mmx32°*30mm, 8 pieces are evenly distributed around the circumference, and 6 groups are axially arrayed); On the cross section, each group of SmCo permanent magnets is equally spaced to form a circle coaxial with the rotor body; and the rotor body is respectively provided with an axial magnetic isolation groove 7 on both sides of each group of SmCo permanent magnets (The size is 2mm*5mm);

[0069] The stator body 4 (the size is 215mm*215mm) located on the outside of the circumferential surface of the rotor body; an air gap 5 with a radial thickness of 0.5mm is provided between the rotor body and the stator body...

Embodiment 2

[0080] A samarium cobalt permanent magnet suitable for high temperature and high pressure pure hydrogen environment, its expression (excluding the coating) is Sm(Co 0.61 Fe 0.2 Cu 0.16 Zr 0.03 ) 7.2 , the specific preparation steps are as follows:

[0081] (1) Put the samarium-cobalt magnet raw material into the vacuum melting induction furnace after batching according to the element ratio, and obtain the alloy ingot by melting in an inert environment;

[0082] (2) Pass the ingot obtained by smelting into nitrogen for crushing treatment, and then produce samarium cobalt powder with an average particle size of 4.1 μm through jet milling under an inert environment;

[0083] (3) Orientate the samarium-cobalt powder under the protection of argon gas and in a magnetic field (the magnetic field strength is 2T), and then perform cold isostatic pressing for 30 minutes (the pressure for cold isostatic pressing is 200MPa) to obtain a samarium-cobalt magnet green body;

[0084] (4)...

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Abstract

The invention relates to the field of permanent magnet materials, and discloses a high-temperature-resistant and hydrogen-resistant samarium-cobalt permanent magnet motor which comprises a rotor body (1); a rotor spline shaft (2), assembled at the axis of the rotor body; a plurality of samarium cobalt permanent magnets (3) which are uniformly embedded in the rotor body; a stator body (4), arranged on the outer side of the circumferential surface of the rotor body; an air gap (5), formed between the rotor body and the stator body; and a plurality of stator coils (6), uniformly embedded in the inner circumferential surface of the stator body. According to the permanent magnet motor, the samarium cobalt permanent magnets with excellent hydrogen resistance and high temperature resistance are adopted, so that the use of the permanent magnet motor in a high-temperature and high-pressure pure hydrogen environment is ensured.

Description

technical field [0001] The invention relates to the field of permanent magnet materials, in particular to a high temperature and hydrogen resistant samarium cobalt permanent magnet motor. Background technique [0002] Rare earth permanent magnet motor is a new type of permanent magnet motor. Because rare earth permanent magnet materials have more excellent and durable magnetic properties, rare earth permanent magnet motors have the advantages of light weight, small size and reliable operation. Therefore, the performance of the rare earth permanent magnet motor is largely affected by the rare earth permanent magnet material it uses. [0003] Rare earth permanent magnet materials commonly used in rare earth permanent magnet motors mainly include sintered NdFeB and sintered SmCo. Compared with sintered NdFeB, sintered SmCo not only has excellent magnetic properties, but also has corrosion resistance and high temperature resistance and good high temperature stability. Samarium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F7/02H01F41/02H02K1/02H02K1/22H02K15/03
CPCH01F7/0215H01F41/0253H02K1/02H02K1/22H02K15/03
Inventor 徐道兵赵宇沈定君樊金奎王栋雷建卓宇房漪
Owner HANGZHOU PERMANENT MAGNET GRP
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