CN115580102A - Non-unbalance-load permanent magnet eddy current flexible coupling - Google Patents

Non-unbalance-load permanent magnet eddy current flexible coupling Download PDF

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Publication number
CN115580102A
CN115580102A CN202110684496.9A CN202110684496A CN115580102A CN 115580102 A CN115580102 A CN 115580102A CN 202110684496 A CN202110684496 A CN 202110684496A CN 115580102 A CN115580102 A CN 115580102A
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CN
China
Prior art keywords
disc
magnetic
magnetic disk
conductor
permanent magnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110684496.9A
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Chinese (zh)
Inventor
马忠威
陈德民
王文慧
曹从磊
马骁
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Magna Magnetomotive Co ltd
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Magna Magnetomotive Co ltd
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Publication date
Application filed by Magna Magnetomotive Co ltd filed Critical Magna Magnetomotive Co ltd
Priority to CN202110684496.9A priority Critical patent/CN115580102A/en
Publication of CN115580102A publication Critical patent/CN115580102A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
    • H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
    • H02K49/046—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type with an axial airgap
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
    • H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
    • H02K49/108—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with an axial air gap

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)

Abstract

The invention discloses an unbalance-load-free permanent magnet eddy current flexible coupling, which comprises: the permanent magnetic disk assembly at least comprises a first magnetic disk and a second magnetic disk, wherein the first magnetic disk and the second magnetic disk are arranged at intervals, and an installation space is formed between the first magnetic disk and the second magnetic disk; the permanent magnetic disc assembly is connected with a first external device; a conductor disc assembly comprising a conductor disc and a connection hub, the conductor disc being mounted on the connection hub; the conductor disc assembly is arranged in the permanent magnet disc assembly, and the conductor disc is positioned in the installation space between the first magnetic disc and the second magnetic disc; the conductor disc assembly is connected with a second external device. The self-positioning permanent magnet eddy current flexible coupler overcomes the defect that a traditional eddy current flexible coupler is easy to stick to a disc. The larger the air gap deviation on the two sides of the magnetic disk is, the larger the repulsion force on the side with the small air gap is, and the magnetic disk is favorable for returning to the middle position. Thereby fundamentally solving the problem of sticking the dish, prolonging the service life and bringing economic and social benefits.

Description

Non-unbalance-load permanent magnet eddy current flexible coupling
Technical Field
The invention belongs to the technical field of magnetic transmission equipment, and particularly relates to an unbalance-load-free permanent magnet eddy current flexible coupling.
Background
The permanent magnet transmission device mainly comprises a conductor rotor and a permanent magnet rotor. The conductor rotor may be fixed to the motor shaft and the permanent magnet rotor may be fixed to the load shaft with a gap (referred to as an air gap) between the conductor rotor and the permanent magnet rotor. The transmission principle is that when the conductor rotor and the permanent magnet rotor move relatively, the conductor rotor cuts magnetic lines of force to generate eddy current in the conductor, the eddy current further generates an induction magnetic field opposite to the permanent magnet rotor, and torque transmission is realized through the action of magnetic force.
In order to improve the power transmission capacity, the conductor rotor and the permanent magnet rotor are connected in series in a mode of connecting a plurality of conductor discs and a plurality of magnetic discs, and the conductor discs are arranged on two sides of the magnetic discs in the arrangement mode of the conductor rotor and the permanent magnet rotor. Meanwhile, in order to improve the rigidity of the magnetic disk and increase the magnetic field intensity of the conductor disk, a steel back plate needs to be arranged outside the conductor disk. However, the inventor finds that the steel back plate can generate magnetic attraction with the permanent magnetic disk while increasing the magnetic field intensity. Although theoretically, the suction force of the steel back plates on the two sides of the permanent magnetic disk is completely the same, due to the fact that manufacturing errors and installation errors are unavoidable, the ideal state that the theoretical suction force on the two sides is consistent can be broken, the suction force is uneven, the magnetic disk can be driven to move on one side with large suction force, the gap can be smaller and smaller, after the permanent magnetic disk works for a period of time, the gap between the supporting bearings at the two ends of the equipment can be enlarged, and the offset of the magnetic disk can be further increased until the disk is pasted and stopped. And if the magnetic disc is not worn, the magnetic steel is demagnetized and damaged. And if the weight is high, the magnetic steel is broken into pieces to cause accidents.
Disclosure of Invention
The invention aims to provide an unbiased load permanent magnet eddy current flexible coupling to solve the problem of damage such as abrasion of a magnetic disk.
The technical scheme for solving the technical problems is as follows: an unbiased loading permanent magnet eddy current flexible coupling, comprising: the permanent magnetic disk assembly at least comprises a first magnetic disk and a second magnetic disk, wherein the first magnetic disk and the second magnetic disk are arranged at intervals, and an installation space is formed between the first magnetic disk and the second magnetic disk; the permanent magnetic disc assembly is connected with first external equipment; a conductor disc assembly comprising a conductor disc and a connection hub, the conductor disc being mounted on the connection hub; the conductor disc assembly is arranged in the permanent magnet disc assembly, and the conductor disc is positioned in the installation space between the first magnetic disc and the second magnetic disc; the conductor disc assembly is connected with a second external device.
The invention relates to an unbiased load permanent magnet eddy current flexible coupling, which comprises a permanent magnet assembly, a permanent magnet assembly and a permanent magnet assembly, wherein the permanent magnet assembly comprises a first magnetic disc and a second magnetic disc; the conductor disc assembly comprises a first conductor disc and a second conductor disc, and the first conductor disc and the second conductor disc are fixed on the connecting hub at intervals; the first conductor plate is disposed between the first magnetic disk and the second magnetic disk to form an installation space, and the second conductor plate is disposed between the third magnetic disk and the second magnetic disk to form an installation space.
The non-unbalance-load permanent magnet eddy current flexible coupling further comprises a steel back plate arranged on the first magnetic disc, a steel back plate arranged on the third magnetic disc, and a connecting bolt used for connecting the first magnetic disc, the second magnetic disc and the third magnetic disc into a whole.
According to the non-unbalance-load permanent magnet eddy current flexible coupling, a magnet installation groove is formed in one side of the steel back plate, and the permanent magnet is fixed in the magnet installation groove.
According to the non-unbalance-load permanent magnet eddy current flexible coupling, a spacer sleeve is arranged between the first magnetic disk and the second magnetic disk, a spacer sleeve is arranged between the third magnetic disk and the second magnetic disk, and the width of an installation space is the same as that of the spacer sleeve.
The non-unbalance permanent magnet eddy current flexible coupling is characterized in that the first magnetic disc, the second magnetic disc and the third magnetic disc are provided with permanent magnets, the magnetizing directions of the permanent magnets are parallel to the axial direction of the coupling, and the magnetic poles of the permanent magnets arranged on the adjacent magnetic discs are opposite in direction.
The invention has the beneficial effects that: according to the self-positioning permanent magnet eddy current flexible coupler provided by the invention, the conductor disc assembly adopts a structure without a steel back plate, so that no suction effect exists when the magnetic disc and the conductor disc are in a static state, and the stability of the gap between the magnetic disc and the conductor disc is ensured. When the magnetic disk and the conductor disk are in axial position deviation, under the action of repulsion force, the magnetic disk and the conductor disk can be positioned at the actual central position, and accidents such as disk sticking and the like are prevented.
Drawings
The above and/or other advantages of the invention will become more apparent and more readily appreciated from the following detailed description taken in conjunction with the accompanying drawings, which are given by way of illustration only and not by way of limitation, and in which:
FIG. 1 is a schematic view of an unbiased load permanent magnet eddy current flexible coupling according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of an unbiased load permanent magnet eddy current flexible coupling in accordance with an embodiment of the present invention;
fig. 3 is a schematic view of a permanent magnet disc assembly according to an embodiment of the present invention;
FIG. 4 is a schematic view of a conductor disc assembly according to one embodiment of the present invention;
FIG. 5 is a schematic diagram of an embodiment of an operating state of an unbiased load permanent magnet eddy current flexible coupling;
FIG. 6 is a schematic view of a first disk and permanent magnet according to one embodiment of the invention;
fig. 7 is a schematic diagram of a prior art permanent magnet eddy current compliant coupling.
In the drawings, the components represented by the respective reference numerals are listed below:
10. permanent magnet disc assembly 101, first magnetic disc, 102, second magnetic disc, 103, third magnetic disc, 104, steel back plate, 105, permanent magnet, 106, connecting bolt, 107, spacer sleeve, 20, conductor disc assembly, 201, first conductor disc, 202, second conductor disc, 203, connecting hub, 31, first rotor, 32, second rotor, 33, steel plate, 34, conductor disc, 35, neodymium iron boron magnet.
Detailed Description
Hereinafter, embodiments of the unbiased load permanent magnet eddy current flexible coupling of the present invention will be described with reference to the accompanying drawings.
The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the invention. Like reference numerals are used to denote like parts.
Fig. 7 shows a structural form adopted by a prior art coupler, in order to improve power transmission capability, a plurality of conductor disks and a plurality of magnetic disks are connected in series for the first rotor 31 and the second rotor 32, and neodymium iron boron magnets 35 are installed on the magnetic disks; in the first rotor 31 and second rotor 32 arrangement, the conductor disks 34 are disposed on both sides of the magnetic disks. Meanwhile, in order to improve the rigidity of the magnetic disk and increase the magnetic field intensity at the position of the conductor disk 34, a steel plate 33 needs to be arranged outside the conductor disk 34. Because the suction of magnetic disk and both sides conductor dish steel sheet is uneven, the one side that suction is big can take the magnetic disk to remove, and the clearance can be littleer and smaller, after working for a period, equipment both ends support the bearing clearance and can grow, and the magnetic disk offset just can further increase this moment, shuts down until the subsides dish.
Fig. 1-6 illustrate an unbiased load permanent magnet eddy current flexible coupling in accordance with an embodiment of the present invention, including:
the permanent magnet disc assembly 10 comprises at least a first magnetic disc 101 and a second magnetic disc 102, wherein the first magnetic disc 101 and the second magnetic disc 102 are arranged at intervals, and an installation space is formed between the first magnetic disc 101 and the second magnetic disc 102; the permanent magnet disc assembly 10 is connected with a first external device;
the conductor disc assembly 20, the conductor disc assembly 20 includes the conductor disc 34 and connects the hub 203, the conductor disc 34 is installed on connecting the hub 203; the conductor disc assembly 20 is arranged in the permanent magnet disc assembly 10, and the conductor disc 34 is positioned in the mounting space between the first magnetic disc 101 and the second magnetic disc 102; the conductor disc assembly 20 is connected to a second external device.
The embodiment of the invention provides an unbalance-load-free permanent magnet eddy current flexible coupling which adopts a structural form that a conductor disc is arranged in the middle, the conductor disc assembly does not have a steel back plate, and the magnetic disc and the conductor disc have no suction effect in a static state, so that the stability of a gap between the magnetic disc and the conductor disc is ensured. Meanwhile, because the magnets on the magnetic disk are arranged in an N/S pole alternate circle, when the magnetic disk and the conductor disk rotate relatively, the conductor disk can generate an eddy current electric field in the area where the magnetic field changes to keep the original magnetic field state (Lenz' S law) for a short time and generate a repulsion relation with the new magnetic pole which just moves to the place. The size of the repulsive force is in direct proportion to the magnetic field intensity, and when the conductor disc is close to the single-side magnet disc, the single-side repulsive force is increased to force the conductor disc to move towards the middle gap. Due to the adoption of the structure, when the axial position of the conductor disc is deviated, the repulsive force of the deviated magnetic disc to the conductor disc is larger than that of the magnetic disc on the other side, so that the conductor disc can be positioned at the actual central position, and damage accidents such as disc sticking and the like are prevented.
In a preferred embodiment of the unbiased load permanent magnet eddy current flexible coupling, as shown in fig. 3 and 4, the permanent magnet assembly 10 further includes a third magnetic disc 103, the third magnetic disc 103 and the second magnetic disc 102 are arranged at intervals, and an installation space is formed between the third magnetic disc 103 and the second magnetic disc 102; the conductor disc assembly 20 comprises a first conductor disc 201 and a second conductor disc 202, and the first conductor disc 201 and the second conductor disc 202 are fixed on a connecting hub 203 at intervals; the first conductor disk 201 is disposed between the first magnetic disk 101 and the second magnetic disk 102 to form an installation space, and the second conductor disk 202 is disposed between the third magnetic disk 103 and the second magnetic disk 102 to form an installation space. Compared with the first embodiment, the structure adopts a structure with a plurality of discs connected in series, and the force transmission capacity of the equipment can be further improved.
In a preferred embodiment of the unbiased load permanent magnet eddy current flexible coupling, the first magnetic disc 101 includes a steel back plate 104, the third magnetic disc 103 includes a steel back plate 104, and the first magnetic disc 101, the second magnetic disc 102 and the third magnetic disc 103 are connected into a whole through a connecting bolt 106. Preferably, a magnet installation groove is formed at one side of the steel back plate 104, and the permanent magnet 105 is fixed in the magnet installation groove. The structure can avoid the permanent magnet from falling off to cause equipment damage when rotating.
In a preferred embodiment of the unbiased load permanent magnet eddy current flexible coupling, a spacer 107 is arranged between the first magnetic disk 101 and the second magnetic disk 102, a spacer 107 is arranged between the third magnetic disk 103 and the second magnetic disk 102, and the width of the installation space is the same as that of the spacer 107. Through the setting of spacer sleeve, prevent that the interval between the disk from changing, influencing equipment operation.
In a preferred embodiment of the unbiased load permanent magnet eddy current flexible coupling, the first magnetic disc 101, the second magnetic disc 102 and the third magnetic disc 103 are provided with permanent magnets 105, the magnetizing direction of the permanent magnets 105 is parallel to the axial direction of the coupling, and the magnetic poles of the permanent magnets 105 mounted on the adjacent magnetic discs are opposite. In connection with fig. 6, the permanent magnets on the disks are preferably arranged in alternating directions, and fig. 6 shows only a portion of the first disk, and the permanent magnets are arranged in a ring shape as a whole. The magnetic steel arrangement mode of the second magnetic disc and the third magnetic disc is the same. However, in the case of connecting the second magnetic disk and the third magnetic disk, the magnetic poles of the permanent magnets at the same axial position of the adjacent magnetic disks are opposite in direction.
The technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the invention, so as to achieve the purpose of the invention.

Claims (6)

1. An unbiased load permanent magnet eddy current flexible coupling, comprising:
the permanent magnetic disk assembly at least comprises a first magnetic disk and a second magnetic disk, wherein the first magnetic disk and the second magnetic disk are arranged at intervals, and an installation space is formed between the first magnetic disk and the second magnetic disk; the permanent magnetic disc assembly is connected with first external equipment;
a conductor disc assembly comprising a conductor disc and a connection hub, the conductor disc being mounted on the connection hub; the conductor disc assembly is arranged in the permanent magnet disc assembly, and the conductor disc is positioned in the installation space between the first magnetic disc and the second magnetic disc; the conductor disc assembly is connected with a second external device.
2. The unbiased load permanent magnet eddy current flexible coupling of claim 1, wherein the permanent magnet disc assembly further includes a third disc, the third disc and the second disc being spaced apart to form an installation space therebetween; the conductor disc assembly comprises a first conductor disc and a second conductor disc, and the first conductor disc and the second conductor disc are fixed on the connecting hub at intervals; the first conductor plate is disposed between the first magnetic disk and the second magnetic disk to form an installation space, and the second conductor plate is disposed between the third magnetic disk and the second magnetic disk to form an installation space.
3. The unbiased load permanent magnet eddy current flexible coupling of claim 2, wherein the first magnetic disc includes a steel back plate, the third magnetic disc includes a steel back plate, and the first magnetic disc, the second magnetic disc and the third magnetic disc are connected into a whole through a connecting bolt.
4. The unbiased load permanent magnet eddy current flexible coupling according to claim 3, wherein one side of the steel back plate is provided with a magnet installation groove, and the permanent magnet is fixed in the magnet installation groove.
5. The unbiased load permanent magnet eddy current flexible coupling according to claim 2, wherein a spacer sleeve is provided between the first magnetic disk and the second magnetic disk, a spacer sleeve is provided between the third magnetic disk and the second magnetic disk, and the width of the installation space is the same as that of the spacer sleeve.
6. The unbiased load permanent magnet eddy current flexible coupling according to claim 2, wherein the first magnetic disc, the second magnetic disc and the third magnetic disc are provided with permanent magnets, the magnetizing directions of the permanent magnets are parallel to the axial direction of the coupling, and the magnetic poles of the permanent magnets mounted on the adjacent magnetic discs are opposite in direction.
CN202110684496.9A 2021-06-21 2021-06-21 Non-unbalance-load permanent magnet eddy current flexible coupling Pending CN115580102A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110684496.9A CN115580102A (en) 2021-06-21 2021-06-21 Non-unbalance-load permanent magnet eddy current flexible coupling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110684496.9A CN115580102A (en) 2021-06-21 2021-06-21 Non-unbalance-load permanent magnet eddy current flexible coupling

Publications (1)

Publication Number Publication Date
CN115580102A true CN115580102A (en) 2023-01-06

Family

ID=84580030

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110684496.9A Pending CN115580102A (en) 2021-06-21 2021-06-21 Non-unbalance-load permanent magnet eddy current flexible coupling

Country Status (1)

Country Link
CN (1) CN115580102A (en)

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