TW202115750A - Magnetization device and magnetization method - Google Patents

Abstract

An object of the invention is to improve the degree of magnetization of a target object when magnetizing a comparatively small magnet material such as a magnetic coupling mechanism used to drive a magnetically driven pump, while keeping costs low by not requiring multiple magnetization cycles. The device of the invention comprises an outer yoke having a hollow cylindrical shape; magnet materials which are the objects being magnetized, an even number of which are disposed at equal intervals on the inside surface of, and concentrically with, the outer yoke; a magnetization device comprising a number of magnetic field generation sections equivalent to the number of magnet materials, each of which is disposed inward of a magnet material, has an outer circumferential length approximately equal to the inside length of the magnet material, and generates a magnetic field with the opposite polarity from the adjacent magnetic field generation section toward the opposing magnet material; and a power supply device which is connected to the magnetization device and generates a magnetic field sufficient to magnetize the magnet material by passing a current once through a magnetic field generation section; wherein the center of a single magnet material is offset from the center of the opposing magnetic field generation section in the circumferential direction of the inside of the outer yoke by an angle no greater than the angle obtained by dividing 360° by twice the number of magnet materials.

Description

Magnetizing device and magnetizing method

The present invention relates to a technique of magnetizing a magnet constituting a magnetic coupling mechanism in a pump driven by a magnet.

In recent years, the market demand for pumps with a magnetic coupling (magnetic coupling) mechanism that drives gears and other driving bodies by magnetic action has been further increasing. In the pump industry having such a magnetic coupler mechanism, gear pumps are used in various fluids due to higher performance of magnets used in the magnetic coupler. Especially in high-viscosity fluid quantitative transfer, metering transfer, and hydraulic power transmission devices, it is used as a high-pressure generator in various rotation speed regions.

In addition, a large amount of research and development has been carried out in the past on the method of efficiently magnetizing the magnets used in the driving mechanism of rotating equipment such as motors and generators, and the results have been applied for a number of patents.

For example, Patent Document 1 proposes "a method of magnetizing a plurality of rare earth magnets fixed on a rotor with a high magnetic susceptibility", and Patent Document 2 proposes "a simple method to obtain a complete non-magnetized part." High-performance magnets that can be reduced, and a magnetizing device that can prevent the yoke from fusing by using thick-wire excitation coils.” [Prior technical literature] [Patent Literature]

Patent Document 1: Japanese Patent Application Publication No. 2002-124414 Patent Document 2: Japanese Patent Application Publication No. 2002-204542

[The problem to be solved by the invention]

However, the above-mentioned prior art is a technique in a drive mechanism of a large-scale rotating device, and there is a problem that it is difficult to apply to an action of magnetizing a relatively small magnet material.

In addition, any of the above-mentioned prior arts has the problem that the overall work of magnetizing the magnet material based on performing multiple magnetization operations becomes expensive.

Therefore, in view of the above-mentioned problems, in the present invention, an object is to provide a magnetization device that does not perform multiple magnetization operations when magnetizing a relatively small magnetic material such as a magnetic coupling mechanism driven by a magnet drive pump to reduce cost. , It can also increase the degree of magnetization of the magnetized object. [The way to solve the problem]

One type of magnetization device in this specification is characterized in that the magnetization device has: a hollow cylindrical outer yoke formed of a ferromagnetic body; a first magnet material, which is a magnetized product of an anisotropic magnet, An even number is arranged on the inner surface of the outer yoke and at equal intervals on the same circumference; the first magnetizer includes the same number of first magnetic field generating parts as the first magnet material, and the first magnetic field generating parts are arranged at The inner side of the first magnet material has an outer circumference that is approximately the same as the length of the inner side of the first magnet material, and is composed of an iron core and a coil wound around the iron core, and current flows in the coil A magnetic field is generated for the opposing first magnet material, in which a magnetic field of a different pole is generated by the neighbor; and a magnetization power supply device, which is connected to the first magnetizer, by allowing current to flow in the coil only once The magnetic field required for the magnetization of the first magnet material is generated; the magnetization device includes a center of the first magnet material and a center of the first magnet material facing the first magnet material in the circumferential direction inside the outer yoke. The center of the magnetic field generating part is offset by 360° or less divided by 2 times the number of the first magnet material, and the outer magnet composed of the first magnet material and the outer yoke is used to interact with the inner magnet The magnetic coupling of the pump forms a magnetic coupling mechanism that drives the driving body of the pump. [Effects of Invention]

When the magnetizing device disclosed in this specification magnetizes a relatively small magnet material such as a magnetic coupler mechanism that drives a magnetic drive pump, it does not perform multiple magnetization operations to reduce costs and increase the degree of magnetization of the magnetized material.

[Preferable form of implementing the invention]

The mode for implementing the present invention will be described with reference to the drawings.

(The composition of the magnetization device of this embodiment) The configuration of the magnetization device 1 of the present embodiment will be described with reference to FIGS. 1 to 7. FIG. 1 is a cross-sectional view showing the external magnet 24 (including the outer yoke 2 and the first magnet material 4 ), and FIG. 2 is a diagram showing the first magnetizer 6. 3 is a cross-sectional view showing the internal magnet 26 (including the internal yoke 16 and the second magnet material 18). 4 and 5 are diagrams showing the positional relationship between the magnet materials 4 and 18 and the magnetic field generating parts 8 and 22 during the magnetization operation, and FIG. 6 is a diagram showing an example of the measurement result of the magnetization performance of the magnetization device 1. FIG. 7 is a diagram showing a cross-sectional structure of a pump 30 driven by a magnet.

The magnetization device 1 includes an outer yoke 2, a first magnet material 4, a first magnetizer 6, a magnetization power supply device 14, an inner yoke 16, a second magnet material 18, and a second magnetizer 20. As shown in FIG. 1, the outer yoke 2 is formed of a ferromagnetic body such as carbon steel, and is a part formed in a hollow cylindrical shape or a cup shape.

As shown in FIG. 1, the first magnet material 4 is a magnetized object to be magnetized by the magnetization device 1, which is composed of an anisotropic magnet such as a neodymium magnet and a samarium cobalt magnet. An even number of first magnet materials 4 are arranged on the inner surface of the outer yoke 2 at equal intervals on the same circumference. Although the first magnet materials 4 are slightly different, their shapes are approximately the same. The first magnet material 4 may be in the shape of a rectangular parallelepiped, and may be formed in a concentric shape along the inner surface of the outer yoke 2. In this case, the first magnet materials 4 of substantially the same shape are preferably connected to each other.

As shown in FIG. 2, the first magnetizer 6 includes the same number of first magnetic field generating parts 8 as the first magnet material 4. The first magnetic field generating unit 8 is composed of an iron core 10 and a coil 12 wound around the iron core 10, and is a part that generates a magnetic field to the opposing first magnet material 4 by the current flowing in the coil 12. The first magnetic field generating portion 8 is arranged inside the first magnet material 4 and has an outer circumference that is approximately the same as the length of the inside of the first magnet material 4. In addition, the adjacent first magnetic field generating units 8 respectively generate magnetic fields of different poles.

As shown in FIG. 3, the inner yoke 16 is formed of a ferromagnetic body such as carbon steel, and is a portion formed in a cylindrical (cylindrical) shape. However, the inner yoke 16 may also be polygonal with the shape of the magnet.

As shown in FIG. 3, the second magnet material 18 is a magnetized object that is a magnetized object of the magnetization device 1 and is composed of an anisotropic magnet such as a neodymium magnet and a samarium cobalt magnet. An even number of second magnet materials 18 are arranged on the outer surface of the inner yoke 16 at equal intervals on the same circumference. Although the second magnet materials 18 are slightly different, their shapes are approximately the same. The second magnet material 18 may be in the shape of a rectangular parallelepiped, and may also be formed in a concentric shape along the outer surface of the inner yoke 16. At this time, the second magnet materials 18 of substantially the same shape are preferably connected to each other.

The second magnetizer 20 includes the same number of second magnetic field generating parts 22 as the second magnet material 18. The second magnetic field generating portion 22 is composed of an iron core 10 and a coil 12 wound around the iron core 10, and is a part that generates a magnetic field to the opposing second magnet material 18 as the magnetized object by the current flowing in the coil 12. The second magnetic field generating portion 22 is arranged on the outside of the second magnet material 18 and has an inner circumference that is approximately the same as the length of the outside of the second magnet material 18. In addition, the adjacent second magnetic field generating units 22 respectively generate magnetic fields of different poles.

The magnetization power supply device 14 is connected to the first magnetizer 6, and by causing a large current to flow in the coil 12 only once, a large magnetic field required for the magnetization of the first magnet material 4 is generated. In addition, the magnetization power supply device 14 is connected to the second magnetizer 20, and a large current flows through the coil 12 only once to generate a large magnetic field required for the magnetization of the second magnet material 18.

The magnetizing power supply device 14 controls the AC power source by a charging circuit and boosts it with a transformer, and then converts it to DC by a rectifier circuit, and accumulates electric charge in the capacitor bank. Then, the magnetization power supply device 14 sets the discharge circuit to ON (conducting) with respect to the accumulated energy, so that a large current flows instantaneously to the coil 12 to generate a high magnetic field required for magnetization.

As shown in FIG. 4, in the magnetization device 1, in the circumferential direction inside the outer yoke 2, the center of the first magnet material 4 and the center of the first magnetic field generating portion 8 facing the first magnet material 4 deviate by 360°. The angle obtained by twice the number of the first magnet materials 4 is less than or equal to. That is, in the magnetizing device 1, in the circumferential direction inside the outer yoke 2, the end of the first magnetic field generating portion 8 is not aligned with the end of each first magnet material 4, and the ends are deviated from each other in the circumferential direction. The deviation angle is 360°÷"the number of first magnet materials 4"÷2 or less.

As shown in FIG. 5, in the magnetization device 1, in the circumferential direction of the inner yoke 16, the center of the second magnet material 18 and the center of the second magnetic field generating portion 22 facing the second magnet material 18 deviate by 360° divided by The angle obtained by twice the number of the second magnet materials 18 is less than or equal to. That is, in the magnetizing device 1, in the circumferential direction of the inner yoke 16, the end of the second magnetic field generating portion 22 is not aligned with the end of each second magnet material 18, and there is a deviation. The angle is 360°÷"the number of second magnet materials 18"÷2 or less.

As mentioned above, the following reasons are explained: the centers of the magnet materials 4, 18 and the magnetic field generating parts 8, 22 deviate in the circumferential direction, whereby the magnetization device 1 does not perform multiple magnetization operations to reduce the cost and increase the magnetization. The degree of magnetization of objects 4 and 18.

Like the existing magnetization device, the end of the magnetic field generating part is aligned with the end of each magnet material in the circumferential direction. When the magnetization operation is performed by the magnetization power supply device, the adjacent magnet materials (gap) become unmagnetized. area. In the presence of this unmagnetized region, a demagnetized field region is formed between adjacent magnet materials, and furthermore, a different pole is likely to appear there, which becomes a loss.

On the other hand, as in the magnetization device 1, when the ends of the magnetic field generating parts 8, 22 are not aligned with the ends of the respective magnet materials 4, 18 in the circumferential direction, the positions of the magnet materials 4, 18 are There are the N pole area and the S pole area. Moreover, in this case, the connecting parts of the adjacent magnet materials 4 and 18 become the same pole. In the conventional method, the magnetic field is not easily leaked out of the demagnetizing area, and a repulsive magnetic field is generated at the connecting part. Generate a stronger magnetic field.

Figure 6 shows the result of the measurement: when the angle of the deviation is changed, how does the degree of magnetization of the magnet materials 4 and 18 formed by the magnetization device 1 change compared with the full magnetization (100% reference line in the figure) . In addition, in FIG. 6, the number of the first magnet materials 4 is set to eight.

In the measurement result shown in Fig. 6, as the above-mentioned deviation angle becomes larger, the degree of magnetization is improved, when the deviation angle is 22.5° (=360°÷"number of first magnet material 4=8" ÷2), the degree of magnetization becomes a peak, which is a result of exceeding the state of full magnetization. In addition, by applying a sufficiently strong magnetic field to the magnet body in the air-core coil to achieve full magnetization, I believe that the magnet at this time has almost reached saturation magnetization.

As shown in FIG. 7, the first magnet material 4 and the outer yoke 2 magnetized by the magnetizer 1 and the second magnet material 18 and the inner yoke 16 are used as the driving body of the pump 30. The combination of the outer yoke 2 and the first magnetic material 4 is called an outer magnet 24, and the combination of the inner yoke 16 and the second magnetic material 18 is called an inner magnet 26.

As shown in FIG. 7, the pump 30 is a structure in which a driving body is driven by a magnetic coupler mechanism 28, and the aforementioned magnetic coupler mechanism is formed by a magnetic coupling between an external magnet 24 and an internal magnet 26.

Based on the above configuration, when the magnetization device 1 magnetizes relatively small magnet materials 4, 18 such as the magnetic coupler mechanism 28 that drives the magnet drive pump 30, the magnetization operation is not performed multiple times to reduce the cost and increase the magnetized material. 4. The degree of magnetization of 18.

(How to use the magnetization device of this embodiment) The magnetization method of the magnetization device 1 will be explained using FIGS. 4, 5, and 6. As shown in FIG. 4, in the magnetization device 1, in the circumferential direction inside the outer yoke 2, the center of the first magnet material 4 and the center of the first magnetic field generating portion 8 facing the first magnet material 4 deviate by 360°. The outer yoke 2 and the first magnet material 4 are provided in the first magnetizer 6 at an angle equal to or less than twice the number of the first magnet materials 4. That is, in the magnetization device 1, in the circumferential direction inside the outer yoke 2, the end of the first magnetic field generating portion 8 does not coincide with the end of each first magnet material 4, and they deviate from each other. The angle is 360°÷"the number of first magnet materials 4"÷2 or less.

In the magnetizing power supply device 14, the AC power source is controlled by a charging circuit and boosted by a transformer. After that, it is converted into DC by a rectifier circuit, and the charge is accumulated in the capacitor bank. In addition, in the magnetization power supply device 14, the discharge circuit is set to ON with respect to the accumulated energy, the coil 12 is energized instantaneously, a large current is flowed to the coil 12, and a high magnetic field required for magnetization is generated. For a group of external magnets 24 formed of the external yoke 2 and the plurality of first magnet materials 4, this magnetization operation is performed only once.

In addition, as shown in FIG. 5, in the magnetization device 1, in the circumferential direction of the inner yoke 16, the center of the second magnet material 18 and the center of the second magnetic field generating portion 22 facing the second magnet material 18 are offset by 360° The inner yoke 16 and the second magnet material 18 are provided in the second magnetizer 20 at an angle equal to or less than twice the number of the second magnet materials 18. That is, in the magnetizing device 1, in the circumferential direction of the inner yoke 16, the end of the second magnetic field generating portion 20 is not aligned with the end of each second magnet material 18, and there is a deviation. The angle is 360°÷"the number of second magnet materials 18"÷2 or less.

In the magnetizing power supply device 14, the AC power source is controlled by a charging circuit and boosted by a transformer. After that, it is converted into DC by a rectifier circuit, and the charge is accumulated in the capacitor bank. In addition, in the magnetization power supply device 14, the discharge circuit is set to ON with respect to the accumulated energy, the coil 12 is energized instantaneously, a large current is flowed to the coil 12, and a high magnetic field required for magnetization is generated. For a group of external magnets 26 formed of an internal yoke 16 and a plurality of second magnet materials 18, this magnetization operation is performed only once.

As shown in FIG. 6, the magnetization method made by the magnetization device 1 described above can improve at least the magnet materials 4, 18 compared to the case where the magnet materials 4, 18 and the magnetic field generating parts 8, 22 are not deviated from each other. The degree of magnetization. In addition, in the magnetization method formed by the magnetization device 1 described above, when the magnitude of the deviation between the magnet materials 4, 18 and the magnetic field generating parts 8, 22 is within a specific range, the magnetization degree of the magnet materials 4, 18 can be made more than the full range. The magnetization state is higher.

Therefore, the magnetization method formed by the magnetization device 1 can reduce the cost without performing multiple magnetization operations when magnetizing relatively small magnet materials 4, 18 such as the magnetic coupling mechanism 28 driven by the magnet drive pump 30. Increase the degree of magnetization of the magnetized objects 4 and 18.

The embodiments of the present invention have been described in detail above, but the present invention is not limited to specific embodiments, and various modifications and changes can be made within the scope of the gist of the present invention described in the scope of the patent application.

1: Magnetization device 2: External yoke 4: The first magnet material 6: The first magnetizer 8: The first magnetic field generating part 10: iron core 12: Coil 14: Magnetized power supply device 16: internal yoke 18: The second magnet material 20: second magnetizer 22: The second magnetic field generating part 24: External magnet 26: Internal magnet 28: Magnetic coupler mechanism 30: Magnet drive pump

Figs. 1(a) to (c) are diagrams showing a configuration example of an external magnet of this embodiment. Fig. 2 is a diagram showing a configuration example of the first magnetizer of the present embodiment. 3(a) to (c) are diagrams showing a configuration example of the internal magnet of the present embodiment. Fig. 4 is a diagram illustrating the positional relationship between the first magnet material and the first magnetic field generating portion of the present embodiment. FIG. 5 is a diagram illustrating the positional relationship between the second magnet material and the second magnetic field generating portion of this embodiment. 6(a) to (b) are diagrams showing examples of measurement results of the magnetization performance of the magnetization device of the present embodiment. Fig. 7 is a diagram showing an example of a magnet-driven pump of this embodiment.

4: The first magnet material

8: The first magnetic field generating part

Claims (6)

A magnetization device includes: Hollow cylindrical outer yoke, formed of ferromagnetic body; The first magnet material, which is the magnetized object of the anisotropic magnet, is arranged on the inner surface of the outer yoke and at equal intervals on the same circumference; The first magnetizer includes the same number of first magnetic field generating parts as the first magnet material, and the first magnetic field generating part is arranged on the inner side of the first magnet material and has a length approximately equal to that of the inner side of the first magnet material. The outer circumference is the same, and it is composed of an iron core and a coil wound around the iron core. By passing a current through the coil, the opposing first magnet material generates a magnetic field, and causes the adjacent first magnet material to generate a magnetic field. The magnetic field generating parts generate magnetic fields of different poles to each other; and A magnetization power supply device, connected to the first magnetizer, generates a magnetic field required for magnetization of the first magnet material by passing a current through the coil only once; Its characteristics are: The center of the first magnet material and the center of the first magnetic field generating portion facing the first magnet material are offset in the circumferential direction inside the outer yoke by 360° divided by the number of the first magnet materials Less than the angle obtained by 2 times of, The outer magnet composed of the first magnet material and the outer yoke is used to form a magnetic coupling mechanism for driving the driving body of the pump by magnetic coupling with the inner magnet. Such as the magnetization device of claim 1, in which, The first magnet materials have the same shape as each other. Such as the magnetization device of claim 1 or 2, in which, The first magnet material is formed in a concentric shape along the inner surface of the outer yoke, The first magnet materials of substantially the same shape are connected to each other. A magnetization method, which is a magnetization method using a magnetization device, and the magnetization device includes: Hollow cylindrical outer yoke, formed of ferromagnetic body; The first magnet material, which is the magnetized object of the anisotropic magnet, is arranged on the inner surface of the outer yoke and at equal intervals on the same circumference; The first magnetizer includes the same number of first magnetic field generating parts as the first magnet material, and the first magnetic field generating part is arranged on the inner side of the first magnet material and has a length approximately equal to that of the inner side of the first magnet material. The outer circumference is the same, and it is composed of an iron core and a coil wound around the iron core. By passing a current through the coil, the opposing first magnet material generates a magnetic field, and causes the adjacent first magnet material to generate a magnetic field. The magnetic field generating parts generate magnetic fields of different poles to each other; and A magnetization power supply device is connected to the first magnetizer, and generates a magnetic field required for magnetization of the first magnet material by flowing a current through the coil; In this magnetization method, The center of the first magnet material and the center of the first magnetic field generating portion facing the first magnet material are offset in the circumferential direction inside the outer yoke by 360° divided by the number of the first magnet materials Less than the angle obtained by 2 times of, The current for generating the magnetic field required for the magnetization of the first magnet material flows from the magnetization power supply device to the coil only once, so that the adjacent first magnetic field generating parts become different poles, thereby performing the first The magnetization of the magnet material, The magnetic coupling between the outer magnet and the inner magnet formed by the first magnet material and the outer yoke forms a magnetic coupling mechanism that drives the driving body of the pump. Such as the magnetization method of claim 4, where: The first magnet materials have the same shape as each other. Such as the magnetization method of claim 4 or 5, where: The first magnet material is formed in a concentric shape along the inner surface of the outer yoke, The first magnet materials of substantially the same shape are connected to each other.

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