WO2019074176A1

WO2019074176A1 - Magnetic coupling

Info

Publication number: WO2019074176A1
Application number: PCT/KR2018/004183
Authority: WO
Inventors: 이창우
Original assignee: 이창우
Priority date: 2017-10-13
Filing date: 2018-04-10
Publication date: 2019-04-18
Also published as: KR101827223B1

Abstract

The present invention relates to a magnetic coupling characterized by comprising: a first disk rotating together with a driving shaft that is supplied with rotating power from a motor; first permanent magnets arranged radially on the front surface of the first disk such that N-poles and S-poles alternate with each other; a copper plate coupled to the front surface of the first disk so as to form an eddy current to the surface thereof by magnetic forces from the first permanent magnets; a second disk which rotates together with a following shaft, and which is positioned to face the first disk and spaced apart therefrom; and a silicon steel plate coupled and fixed to the rear surface of the second disk and bound to magnetic forces emitted from the first permanent magnets such that, when the first disk rotates, the silicon steel plate rotates together and forcibly rotates the second disk. The present invention is advantageous in that a silicon steel plate having an excellent magnetic permeability is arranged on the second disk and is induced to be firmly bound to magnetic forces from the first permanent magnets embedded in the first disk such that the power transfer efficiency of the motor can be substantially increased, and the number of rotations of the following shaft can be controlled precisely.

Description

Magnetic coupling

More particularly, the present invention relates to a magnetic coupling, in which a silicon steel plate having a high magnetic permeability is disposed on a second disk connected to a driven shaft so as to be firmly coupled to a magnetic force of a first permanent magnet built in a first disk, The power of the motor supplied through the first disk can be efficiently transferred to the second disk through the first permanent magnet and the silicon steel plate, so that the power transmission efficiency of the motor can be significantly increased and a copper plate can be arranged on the first disk To a magnetic coupling capable of further enhancing the power transmission efficiency of the motor by reinforcing the coupling between the first permanent magnet and the silicon steel plate through an attractive force of an eddy current formed by the first permanent magnet.

In general, the coupling is for connecting two different axes such as a drive shaft installed on the motor side and a driven shaft installed on the side of the rotation target body such as a pump so that the two shafts can rotate at the same time. In order to prevent noise and vibration from occurring as the couplings rotate mechanically with each other, or to prevent overloading of the electric motor due to stop of rotation of the driven shaft due to foreign matter or the like, Magnetic coupling using a magnetic force of a magnetic field is used.

However, the conventional magnetic coupling can not effectively utilize the magnetic force, and thus the power on the motor side can not be efficiently transmitted to the slave shaft, so that the conventional magnetic coupling has a problem that the power transmission efficiency is somewhat low.

Further, as described above, the conventional magnetic coupling has a problem in that the power transmission efficiency of the motor is low and it is difficult to precisely control the rotation of the driven shaft.

Disclosure of Invention Technical Problem [8] The present invention has been proposed in order to solve all of the above problems, and an object of the present invention is to provide a magnetic disk apparatus having a magnetic disk, The power of the motor supplied through the first disk can be efficiently transmitted to the second disk through the first permanent magnet and the silicon steel plate so that the power transmission efficiency of the motor can be significantly increased, The present invention provides a magnetic coupling capable of further increasing the power transmission efficiency of the motor by arranging the copper plate on the first permanent magnet and reinforcing the coupling between the first permanent magnet and the silicon steel plate through the attraction of the eddy current formed by the first permanent magnet have.

Further, since the power transmission of the motor is performed efficiently through the magnetic force of the permanent magnet and the eddy current of the copper plate, the energy utilization efficiency of the motor is maximized, and the power and cost consumed in driving the motor can be reduced. Which can induce stable operation management of the magnetic coupling.

Further, it is possible to rotate the second disk through the rotation inducing means to induce easy rotation of the subordinate shaft together with the second disk, and to induce firm coupling of the first disk and the second disk by attraction between the binding magnets And the first and second disks are kept in rotation with each other through the repulsive force of the second coupling magnet and the first permanent magnet so that the number of revolutions of the driven shaft can be controlled precisely.

According to an aspect of the present invention, there is provided a magnetic coupling comprising: a first disk coupled to a driving shaft rotated by a rotational force from a motor and rotating together with the driving shaft; A plurality of first permanent magnets arranged radially with alternating S and S poles and generating a magnetic force forwardly, and a plurality of first permanent magnets coupled to a front surface of the first disc to generate eddy currents through the magnetic force of the first permanent magnets A second disk connected to the driven shaft and rotated together with the driven shaft so as to be spaced apart from the first disk; a second disk coupled to the rear surface of the second disk, A silicon steel plate bound with a magnetic force radiated from a first permanent magnet and forcing the second disk to rotate while rotating together with the first disk having the first permanent magnet built therein; And the like.

A magnetic shielding layer for preventing the magnetic force of the first permanent magnet embedded in the first disk is formed on the rear surface of the first disk. The magnetic shielding layer is formed by nickel plating .

In addition, a heat dissipating plate capable of emitting heat to the surroundings is further formed on the rear surface of the disk.

And a rotation inducing unit for providing a force to the second disk to induce easy rotation of the second disk when the motor operates,

A second permanent magnet disposed radially on the front surface of the second disk and arranged to have a predetermined inclination and rotated together with the second disk; and a second permanent magnet disposed on the front surface of the second disk, And an electromagnet disposed at the same slope as the second permanent magnet and having a repulsive force with the second permanent magnet, wherein the second permanent magnets are all exposed to the outside so that all of the second permanent magnets So that an electromagnet and a repulsive force are formed.

A plurality of first coupling magnets formed on the outer periphery of the first permanent magnet embedded in the first disk so as to be spaced apart from the first permanent magnets and having different poles from the poles of the first permanent magnets; And a second binding magnet disposed on the rear surface of the second disk facing the first binding magnet and having a pole different from the pole of the first binding magnet.

As described above, according to the magnetic coupling according to the present invention, the silicon steel plate having a high magnetic permeability is disposed on the second disk connected to the driven shaft to be firmly bound to the magnetic force of the first permanent magnet built in the first disk, The power of the motor supplied through the first disk can be efficiently transferred to the second disk through the first permanent magnet and the silicon steel plate, so that the power transmission efficiency of the motor can be significantly increased and a copper plate can be arranged on the first disk So that the coupling between the first permanent magnet and the silicon steel sheet is strengthened through the attraction of the eddy current formed by the first permanent magnet, thereby further enhancing the power transmission efficiency of the motor.

Further, since the power transmission of the motor is performed efficiently through the magnetic force of the permanent magnet and the eddy current of the copper plate, the energy utilization efficiency of the motor is maximized, and the power and cost consumed in driving the motor can be reduced. It is possible to induce stable operation management of the system.

Further, it is possible to rotate the second disk through the rotation inducing means to induce easy rotation of the subordinate shaft together with the second disk, and to induce firm coupling of the first disk and the second disk by attraction between the binding magnets The rotation of the first disk and the rotation of the second disk are maintained to be equal to each other through the repulsive force of the second binding magnet and the first permanent magnet so that the accurate rotation number of the driven shaft can be controlled.

1 is a perspective view of a magnetic coupling according to an embodiment of the present invention;

Fig. 2 is an exploded perspective view of the magnetic coupling shown in Fig.

3 is a cross-sectional view taken along line A-A of the magnetic coupling shown in Fig. 1

4 is a perspective view of a magnetic coupling according to another embodiment of the present invention.

Fig. 5 is an exploded perspective view of the magnetic coupling shown in Fig.

Fig. 6 is a view showing the state of use of the magnetic coupling shown in Fig.

The magnetic coupling according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Detailed descriptions of well-known functions and constructions that may be unnecessarily obscured by the gist of the present invention will be omitted.

FIG. 1 is a perspective view of a magnetic coupling according to an embodiment of the present invention, FIG. 2 is a perspective view of a magnetic coupling according to an embodiment of the present invention, and FIG. Fig. 4 is a perspective view of a magnetic coupling according to another embodiment of the present invention, Fig. 5 is a perspective view of the magnetic coupling shown in Fig. 4, Fig. And FIG. 6 is a view showing the state of use of the magnetic coupling shown in FIG. 1, respectively.

The magnetic coupling 100 according to the embodiment of the present invention includes a first disk 10, a first permanent magnet 20, a copper plate 30, a second disk 40 And a silicon steel plate 50, as shown in Fig.

As shown in FIGS. 1 to 3, the first disk 10 is connected to a driving shaft 1 rotated by a rotation force from a motor, and rotates together with the driving shaft 1.

The first permanent magnet 20 may be fixed on the front surface of the first disk 10 to fix the first permanent magnet 20 securely .

As shown in FIGS. 1 to 3, the first permanent magnet 20 has a plurality of N-poles and S-poles alternately arranged on the front surface of the first disk 10, Let it diverge.

Here, the magnetic force radiated from the first permanent magnet 20 is absorbed by the silicon steel plate 50 to be hounded to strongly bind the silicon steel plate 50 through the first permanent magnet 20, The driving force of the motor is transmitted to the second disk 40 to be hounded through the binding force so that the slave shaft 2 rotates.

1 to 3, the copper plate 30 is coupled to the front surface of the first disk 10 to form an eddy current on the surface through the magnetic force of the first permanent magnet 10, The coupling between the first permanent magnet 20 and the silicon steel plate 50 is strengthened through such an eddy current attraction force.

Meanwhile, the copper plate 30 plays an additional role of preventing overheating of the first disk 10 through heat exchange with the surroundings, so that the first permanent magnet 20 built in the first disk 10 Thereby preventing the problem of overheating and losing the magnetic force, leading to smooth operation of the device.

As shown in FIGS. 1 to 3, the second disk 40 is connected to the driven shaft 2 and rotates together with the driven shaft 2, and is spaced apart from the first disk 10 .

1 to 3, the silicon steel plate 50 is fixedly coupled to the rear surface of the second disk 40, and is coupled to a magnetic force emitted from the first permanent magnet 20, When the first disk 10 having the permanent magnets 20 embedded therein is rotated, the second disk 40 is forced to rotate while being rotated together.

That is, as shown in FIG. 6A, when the first disk 10 is rotated by driving a motor, the magnetic coupling 100 according to the present invention is rotated together with the first disk 10 to rotate the first permanent magnet 20, The silicon steel plate 50 which is magnetically coupled to the first permanent magnet 20 is rotated so that the power of the motor is transmitted while the slave shaft 2 rotates together with the second disk 40. [

At this time, since the silicon steel plate 50 has a high magnetic permeability and is capable of including a large amount of magnetic flux, it is very strongly bound to the magnetic force of the first permanent magnet 20, The rotating force of the disk 10 can be very effectively transmitted to the second disk 40 through the first permanent magnet 20 and the silicon steel plate 50 so that the power of the motor can be efficiently used .

Further, if the magnetic flux changes while the first permanent magnet 20 rotates together with the first disk 10, an electromotive force is generated in the copper plate 30, and by the attractive force of the eddy current formed by the electromotive force, The first permanent magnet 20 and the silicon steel plate 50 are firmly coupled so that the power of the motor is more efficiently transmitted to the driven shaft 2 through the first permanent magnet 20 and the silicon steel plate 50.

Therefore, the magnetic coupling (100) of the present invention can transmit the power supplied from the motor to the drive shaft (2) with a minimum loss, and an excellent power transmission effect can be expected.

As shown in FIGS. 1 to 3, on the rear surface of the first disk 10, a magnetic force shielding layer (not shown) for preventing the magnetic force of the first permanent magnet 20, which is embedded in the first disk 10, (60).

6B, the magnetic force shielding layer 60 prevents the magnetic force of the first permanent magnet 20 built in the first disk 10 from being diverted rearward, (50) to induce stable rotation of the second disk (40) through the magnetic force of the first permanent magnet (20).

If the magnetic force of the first permanent magnet 20 is diverted to the rear of the first disk 10, if an object that reacts to the magnetic force is disposed behind the first permanent magnet 20, the attraction between the first permanent magnet 20 and the object Or the repulsive force may interfere with the rotation of the first disk 10, so that the magnetic force shield layer 60 prevents the magnetic force from being discharged to the rear of the first disk 10 in advance.

Here, the magnetic shielding layer 60 is formed by a plating method using nickel, which is a ferromagnetic substance capable of easily absorbing the magnetic force of the first permanent magnet 20, Of course not.

Also, as shown in FIGS. 1 to 3, a heat sink 70 capable of emitting heat to the periphery is formed on the rear surface of the

disk

10, 40.

6B, when the first permanent magnet 20 rotates at a high speed together with the

disks

10 and 40 and is overheated due to magnetic force collision between the first permanent magnets 20, Since the magnetic force of the permanent magnet 20 is gradually lost and it is difficult to efficiently transmit the power through the magnetic force of the first permanent magnet 20, the first permanent magnet 20 is in direct contact with the first permanent magnet 20 through the heat sink 70. [ 1 disk 10 to prevent overheating of the first permanent magnet 20 to indirectly induce the magnetic force of the first permanent magnet 20 to be stably maintained.

Further, as shown in FIG. 4, when the motor operates, rotation inducing means 80 for providing a force to the second disk 40 to induce easy rotation of the second disk 40 Respectively,

The rotation inducing means 80 includes a second permanent magnet 81 disposed radially on the front surface of the second disk 40 and disposed to have a predetermined inclination and rotated together with the second disk 40, And an electromagnet 82 spaced from the front surface of the second disk 40 and disposed at the same inclination as the second permanent magnet 40 and having a repulsive force with the second permanent magnet 40 .

Here, all the second permanent magnets 81 are exposed to the outside so that all of the second permanent magnets 81 are repulsive to the electromagnet 82.

That is, when the motor is operated, the rotation induction means 80 supplies power to the electromagnet 82 to magnetize the electromagnet 82, and the electromagnet 82 and the second permanent magnet 81 are energized through the repulsive force of the electromagnet 82 and the second permanent magnet 81 And pushes the second permanent magnet 81 in a direction in which the second disk 40 rotates to induce the second disk 40 to rotate very easily.

Since the second permanent magnet 81 is inclined, the electromagnet 82 can push the second permanent magnet 81 in a rotating direction, thereby helping the second disk 40 to rotate And the electromagnet 82 is inclined in the same manner as the second permanent magnet 81 so that the magnetic force of the electromagnet 82 is easily supplied to the second permanent magnet 81, Of course.

The influence of the magnetic force (repulsive force) of the electromagnet 82 in the process of the second permanent magnet 81 entering the electromagnet 82 due to the inclination of the second permanent magnet 81 The rotation of the second disk 40 is minimized due to the repulsive force of the electromagnet 82 by minimizing the second permanent magnet 81 to induce easy entry of the second permanent magnet 81, Thereby inducing efficient rotation of the second disk 40.

Meanwhile, when the driving of the motor is stopped, the power supplied to the electromagnet 82 is cut off to induce the second disk 40 not to be stopped.

As shown in FIG. 5, a plurality of the permanent magnets 20 are formed on the outer circumference of the first permanent magnet 20 built in the first disk 10 so as to be spaced apart from the first permanent magnet 20, A first binding magnet 91 having a pole different from the pole of the magnet 20 and a plurality of second binding magnets 91 disposed on the rear surface of the second disk 40 so as to face the first binding magnet 91, And a second binding magnet (92) having a pole different from the pole of the magnet (91).

That is, when the first disk 10 rotates, attraction force acts between the first binding magnet 91 and the second binding magnet 92 to induce the second disk 40 to rotate more easily The first permanent magnet 20 and the first permanent magnet 20 opposed to the first and

second coupling magnets

92 and 92 act as a repulsive force with respect to each other, The rotation of the second disk 40 and the first disk 10, which rotate through the magnetic force of the first permanent magnet 20, are the same as each other, To control the number.

The magnetic coupling 100 of the present invention having the above-described components can be manufactured by disposing the silicon steel plate 50 having a high magnetic permeability on the second disk 40 connected to the driven shaft 2, The power of the motor supplied through the first disk 10 is transmitted to the first permanent magnet 20 and the silicon steel plate 50 through the first permanent magnet 20, The power transmission efficiency of the motor can be greatly increased and the copper plate 30 can be disposed on the first disk 10 to increase the power transmission efficiency of the first permanent magnet The coupling between the first permanent magnet 20 and the silicon steel plate 50 is strengthened through the attraction of the eddy current formed by the second permanent magnet 20, thereby further enhancing the power transmission efficiency of the motor.

Further, since the power transmission of the motor is performed very efficiently through the magnetic force of the first permanent magnet 20 and the eddy current of the copper plate 30, the energy efficiency of the motor is maximized, So that it is possible to induce the stable operation management of the facility where the motor is installed.

Not only is it possible to rotate the second disk 40 through the rotation inducing means 80 to induce easy rotation of the driven shaft 2 together with the

second disk

40, 91 and 92 to induce a strong coupling between the first disk 10 and the second disk 40 while simultaneously applying the repulsive force between the second binding magnet 92 and the first permanent magnet 20, The rotation of the first disk 10 and the rotation of the second disk 40 are maintained to be equal to each other so that the accurate number of rotations of the driven shaft 2 can be controlled.

The magnetic coupling 100 according to the embodiment of the present invention having the above-described structure transmits the power of the motor to the driven shaft 2 as follows.

6A, when the motor is driven to rotate the first permanent magnet 20 together with the first disk 10, the silicon steel plate 50, which is coupled due to the magnetic force of the first permanent magnet 20, The second disk 40 and the driven shaft 2 are rotated together with the silicon steel plate 50 to transmit the power of the motor.

At this time, it is needless to say that stable rotation of the second disk 20 is induced by the attractive force of the eddy current formed on the copper plate 30 of the first disk 10.

In the magnetic coupling 100 of the present invention, the first permanent magnet 20 is embedded in the first disk 10 to forcibly rotate the second disk 40 through the magnetic force of the second permanent magnet 20, A plurality of permanent magnets may be disposed on the second disk 40 so that the attraction between the second permanent magnet 20 and the first permanent magnet 20 may induce more efficient rotation of the second disk 40. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. You will understand the point. It goes without saying that variations can be made by those skilled in the art without departing from the spirit of the present invention. Accordingly, the scope of claim of the present invention is not limited within the scope of the detailed description, but will be defined by the following claims and technical ideas thereof.

[Description of Symbols]

1. Drive shaft 2. Slave shaft

3. Bond line

10. First disk 20. First permanent magnet

30. Copper plate 40. Second disk

50. Silicon steel plate 60. Magnetic shielding layer

70. Heat sink 80. Rotation induction means

81. Second permanent magnet 82. Electromagnet

91. First binding magnet 92. Second binding magnet

100. Magnetic coupling

Claims

A first disc (10) connected to a driving shaft (1) rotated by a rotational force from a motor and rotated together with the driving shaft (1);

A plurality of first permanent magnets (20) arranged radially on the front surface of the first disk (10) alternately with N poles and S poles, generating a magnetic force forward;

A copper plate (30) coupled to a front surface of the first disk (10) and forming an eddy current on the surface through the magnetic force of the first permanent magnet (20);

A second disk (40) connected to the driven shaft (2) and rotating together with the driven shaft (2), the second disk (40) being spaced apart from the first disk (10); And

The first permanent magnet 20 is coupled to a rear surface of the second disk 40 and is coupled to a magnetic force emitted from the first permanent magnet 20 to rotate the first disk 10, And a silicon steel plate (50) for rotating the second disk (40) while rotating together.
The method according to claim 1,

A magnetic shielding layer 60 is formed on the rear surface of the first disk 10 to prevent the magnetic force of the first permanent magnet 20 contained in the first disk 10 from being discharged,

And the magnetic shielding layer (60) is formed through nickel plating.
3. The method according to claim 1 or 2,

Wherein a heat dissipating plate (70) capable of emitting heat to the surroundings is further formed on a rear surface of the first and second disks (10, 40).
The method according to claim 1,

And a rotation inducing unit (80) for providing a force to the second disk (40) to induce easy rotation of the second disk (40) when the motor operates,

The rotation induction means (80)

A second permanent magnet 81 disposed radially on the front surface of the second disk 40 and disposed to have a predetermined inclination and rotated together with the second disk 40,

And an electromagnet 82 spaced from the front surface of the second disk 40 and disposed at the same inclination as the second permanent magnet 81 and having a repulsive force with the second permanent magnet 81,

And the second permanent magnets (81) are exposed to the outside so that all of the second permanent magnets (81) are repulsive to the electromagnet (82).
The method according to claim 1,

The first permanent magnet 20 is formed on the first disk 10 so as to be spaced apart from the first permanent magnet 20 on the outer circumference of the first permanent magnet 20, The first binding magnet 91 having the first binding magnet 91,

A plurality of second binding magnets 92 are disposed on the rear surface of the second disk 40 so as to face the first binding magnet 91 and have different poles from those of the first binding magnet 91 Wherein the magnetic coupling comprises a plurality of magnetic couplings.