CN212231321U - Permanent magnet eddy current coupling - Google Patents
Permanent magnet eddy current coupling Download PDFInfo
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- CN212231321U CN212231321U CN202021366010.4U CN202021366010U CN212231321U CN 212231321 U CN212231321 U CN 212231321U CN 202021366010 U CN202021366010 U CN 202021366010U CN 212231321 U CN212231321 U CN 212231321U
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- permanent magnet
- disc
- conductor
- eddy current
- inner arc
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Abstract
A permanent magnet eddy current coupling belongs to the field of magnetic transmission, and particularly relates to the field of permanent magnet eddy current couplings. The utility model provides a current permanent magnetism eddy current coupling exist to pass and turn round the problem that the ability is little and the installation is limited. The permanent magnet synchronous motor comprises a conductor unit and a permanent magnet unit, wherein the conductor unit and the permanent magnet unit are coaxially arranged, and an air gap is arranged in the middle; the conductor unit comprises a conductor back iron disc and a conductor disc; the permanent magnet unit comprises a permanent magnet, a permanent magnet back iron disc and a permanent magnet mounting disc; the conductor disc is coaxially connected with the back iron disc and is positioned on the air gap side; the permanent magnet mounting disc is coaxially connected with the permanent magnet back iron disc and is positioned on the air gap side; the permanent magnets are arranged at equal intervals along the circumferential direction of the permanent magnet mounting disc; the permanent magnet comprises an inner arc permanent magnet and an outer arc permanent magnet, the inner arc permanent magnet and the outer arc permanent magnet are both T-shaped, and the T-shaped horizontal sections of the inner arc permanent magnet and the outer arc permanent magnet are close to the edge of the permanent magnet mounting plate. The utility model is suitable for an use as the shaft coupling.
Description
Technical Field
The utility model belongs to the magnetic drive field, concretely relates to permanent magnetism eddy current coupling field.
Background
Couplings are widely used as connecting devices in mechanical systems. Couplings used in the mechanical field at present are classified into mechanical couplings, hydraulic couplings, and magnetic transmission couplings. The mechanical coupling transmits torque through mechanical coupling, additional force generated during working is relatively large, and the capability of isolating vibration is relatively weak. The hydraulic coupler transmits torque through the action between fluids, so that the transmission efficiency is reduced to some extent, the service life is short, and the later maintenance workload is large. The magnetic transmission coupling transmits torque by utilizing the interaction between magnetic fields, belongs to non-contact torque transmission, and has the characteristics of vibration isolation, noise isolation, strong compensation capability on shaft system deviation and no maintenance. The permanent magnet eddy current coupling is a branch of a magnetic transmission coupling and mainly comprises a permanent magnet disc and an eddy current disc, wherein a permanent magnet is arranged on the permanent magnet disc, a certain rotating speed difference is formed between the permanent magnet disc and the eddy current disc when the permanent magnet eddy current coupling works, the eddy current disc makes a motion of cutting magnetic lines of force in a magnetic field space generated by the permanent magnet disc, an induction magnetic field is generated in the eddy current disc, and the coupling realizes the transmission of torque through the interaction between the induction magnetic fields on the permanent magnet disc and the eddy current disc.
The permanent magnets embedded on the permanent magnet disc of the permanent magnet eddy current coupling are of a rectangular or fan-shaped structure, the two permanent magnets are simple in structure and few in adjustable parameters, the arrangement and selection of the permanent magnets on the permanent magnet disc are limited, the space optimization degree for improving the torque transmission capacity of the coupling is limited, and the application of the permanent magnet eddy current coupling under the conditions of large torque and limited installation is limited.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose is for solving current permanent magnetism eddy current coupling and having the biography to turn round the problem that the ability is little and the installation is limited, optimizes the space for the magnetic circuit that further improves the shaft coupling, provides a permanent magnetism eddy current coupling.
The utility model relates to a permanent magnet eddy current coupling, which comprises a conductor unit and a permanent magnet unit, wherein the conductor unit and the permanent magnet unit are coaxially arranged, and an air gap is arranged in the middle;
the conductor unit comprises a conductor back iron disc 2 and a conductor disc 3; the permanent magnet unit comprises a permanent magnet 5, a permanent magnet back iron disc 6 and a permanent magnet mounting disc 8;
the conductor disc 3 is coaxially connected with the conductor back iron disc 2, and the conductor disc 3 is positioned on the air gap side;
the permanent magnet mounting disc 8 is coaxially connected with the permanent magnet back iron disc 6, and the permanent magnet mounting disc 8 is positioned on the air gap side;
the permanent magnets 5 are arranged at equal intervals along the circumferential direction of the permanent magnet mounting disc 8;
the permanent magnet 5 comprises an inner arc permanent magnet 501 and an outer arc permanent magnet 502, and the inner arc permanent magnet 501 and the outer arc permanent magnet 502 are both T-shaped;
the inner arc permanent magnets 501 are arranged along the inner circumference of the permanent magnet mounting disk 8, and the outer arc permanent magnets 502 are arranged along the outer circumference of the permanent magnet mounting disk 8;
the T-shaped horizontal sections of the inner arc permanent magnet 501 and the outer arc permanent magnet 502 are respectively close to the inner edge and the outer edge of the permanent magnet mounting disc 8;
the inner arc permanent magnets 501 and the outer arc permanent magnets 502 are arranged in a staggered mode; the polarity of the inner arc permanent magnet 501 is opposite to that of the outer arc permanent magnet 502.
Further, the inner arc permanent magnet 501 and the outer arc permanent magnet 502 are the same size.
Further, still include two ring flanges 1, two ring flanges 1 set up respectively in conductor back iron plate 2 and the outside of permanent magnetism back iron plate 6.
Further, the number of the inner arc permanent magnets 501 is the same as that of the outer arc permanent magnets 502, and the number of the inner arc permanent magnets and the number of the outer arc permanent magnets are even.
The utility model discloses a T font permanent magnet provides more adjustable parameters for the magnetic circuit of optimizing the shaft coupling under finite space, has increased the degree of freedom space of optimizing the magnetic circuit parameter, can further improve the biography of shaft coupling and turn round the ability through the overall dimension that changes the permanent magnetism dish magnetic path and the form of arranging of magnetic circuit. For the permanent magnet eddy current coupler with high power and low rotating speed, the magnetic force coupler with the structure has simple structure and low requirement on the space of the used unit, so that the arrangement of the applied unit is more flexible.
Drawings
Fig. 1 is a schematic structural diagram of a permanent magnet eddy current coupling according to the present invention;
FIG. 2 is a schematic diagram of the distribution of permanent magnets on a permanent magnet disk;
fig. 3 is a schematic view of the outer shape of the permanent magnet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The first embodiment is as follows: the following describes the present embodiment with reference to fig. 1 to 3, and the permanent magnet eddy current coupling according to the present embodiment includes a conductor unit and a permanent magnet unit, where the conductor unit and the permanent magnet unit are coaxially disposed, and an air gap is formed between the conductor unit and the permanent magnet unit;
the conductor unit comprises a conductor back iron disc 2 and a conductor disc 3; the permanent magnet unit comprises a permanent magnet 5, a permanent magnet back iron disc 6 and a permanent magnet mounting disc 8;
the conductor disc 3 is coaxially connected with the conductor back iron disc 2, and the conductor disc 3 is positioned on the air gap side;
the permanent magnet mounting disc 8 is coaxially connected with the permanent magnet back iron disc 6, and the permanent magnet mounting disc 8 is positioned on the air gap side;
the permanent magnets 5 are arranged at equal intervals along the circumferential direction of the permanent magnet mounting disc 8;
the permanent magnet 5 comprises an inner arc permanent magnet 501 and an outer arc permanent magnet 502, and the inner arc permanent magnet 501 and the outer arc permanent magnet 502 are both T-shaped;
the inner arc permanent magnets 501 are arranged along the inner circumference of the permanent magnet mounting disk 8, and the outer arc permanent magnets 502 are arranged along the outer circumference of the permanent magnet mounting disk 8;
the T-shaped horizontal sections of the inner arc permanent magnet 501 and the outer arc permanent magnet 502 are respectively close to the inner edge and the outer edge of the permanent magnet mounting disc 8;
the inner arc permanent magnets 501 and the outer arc permanent magnets 502 are arranged in a staggered mode; the polarity of the inner arc permanent magnet 501 is opposite to that of the outer arc permanent magnet 502.
As shown in fig. 2, the permanent magnet 5 is divided into an inner arc permanent magnet 501 and an outer arc permanent magnet 502, which are uniformly distributed along the circumferential direction of the permanent magnet back iron disk 6, and the uniform distribution of the permanent magnets 5 is beneficial to the magnetic disk to have the same stress in all directions, thereby reducing the additional force generated during operation. The axial section of each permanent magnet 5 is T-shaped, the permanent magnet polarity is axial, the N pole and the S pole of each permanent magnet 5 are distributed along the axial direction of the magnetic disk, and the N pole and the S pole of each permanent magnet 5 are alternately arranged along the circumference and are embedded in a staggered mode to provide a bypass for magnetic field backflow, so that the magnetic resistance is reduced, the strength of eddy current generated by induction is increased, and the transmitted force and torque are increased. If the inner arc side of the permanent magnet mounting disk 8 is provided with an N-pole T-shaped inner arc permanent magnet 501, and the outer arc is provided with an S-pole T-shaped outer arc permanent magnet 502. On the contrary, if the outer arc side is provided with the N-pole T-shaped outer arc permanent magnet 502, the inner arc side is provided with the S-pole T-shaped inner arc permanent magnet 501. Compared with fan-shaped and rectangular permanent magnets, the T-shaped permanent magnet 5 provides two additional sets of adjustable parameters for optimizing torque and power transfer efficiency, namely the proportion of the radial size of the T-shaped head and the circumferential duty ratio, so that the space of the freedom degree of the optimized parameters is increased.
Further, the inner arc permanent magnet 501 and the outer arc permanent magnet 502 are the same size.
Further, still include two ring flanges 1, two ring flanges 1 set up respectively in conductor back iron plate 2 and the outside of permanent magnetism back iron plate 6.
Further, the number of the inner arc permanent magnets 501 is the same as that of the outer arc permanent magnets 502, and the number of the inner arc permanent magnets and the number of the outer arc permanent magnets are even.
Further, the polarity of the inner arc permanent magnet 501 and the outer arc permanent magnet 502 are both axial.
Permanent magnetism eddy current coupling simple structure connects flange dish 1 to be located the conductor back of the body iron dish 2 outsides and the outside of permanent magnetism back of the body iron dish 6. Permanent magnet 5, permanent magnet back of the body iron dish 6, permanent magnet mounting disc 8 and the ring flange 1 that closes on permanent magnet mounting disc 8 constitute the permanent magnet rotor, and the conductor rotor arranges with the conductor rotor is coaxial, and permanent magnet 5 is installed and is located near vortex dish side on permanent magnet mounting disc 8, and permanent magnet back of the body iron dish 6 is located the outside of permanent magnet mounting disc 8. The permanent magnet mounting plate 8 has an even number of pairs of permanent magnets 5, and the shape thereof is as shown in fig. 3.
When the driving shaft drives the conductor rotor to rotate, the permanent magnet rotor connected with the load shaft rotates relative to the conductor rotor to generate an eddy current on the conductor disc, so that the permanent magnet disc rotor and the load shaft rotate to further transmit torque. The permanent magnet discs are provided with even number of pairs of permanent magnets which are embedded in a staggered manner and uniformly distributed along the circumference, and the uniform distribution of the permanent magnets is beneficial to the uniform stress of the permanent magnet discs in all directions and reduces the additional force during operation. The axial section of each permanent magnet is T-shaped, the permanent magnet polarity is axial, namely N poles and S poles are distributed along the axial direction of the magnetic disk, the N poles and the S poles of the permanent magnets on the same side are alternately arranged along the circumference, if the inner arc side is provided with the N pole T-shaped permanent magnet, and the outer arc is provided with the S pole T-shaped permanent magnet. On the contrary, if the N-pole T-shaped permanent magnet is arranged on the outer arc side, the S-pole T-shaped permanent magnet is arranged on the inner arc side, and the staggered embedding is beneficial to reducing the magnetic resistance of a magnetic circuit and increasing the strength of the eddy current generated by induction.
The utility model discloses when using, when the drive shaft drove the conductor rotor and rotates, the permanent magnet rotor who connects the load axle rotates relative conductor rotor, produces the eddy current on the conductor dish, makes permanent magnet dish rotor and load axle rotate and then transmission torque. The permanent magnet discs are provided with even number of pairs of permanent magnets which are embedded in a staggered manner and uniformly distributed along the circumference, and the uniform distribution of the permanent magnets is beneficial to the uniform stress of the permanent magnet discs in all directions and reduces the additional force during operation. The axial section of each permanent magnet is T-shaped, the permanent magnet polarity is axial, namely the N pole and the S pole are distributed along the axial direction of the magnetic disk, the N pole and the S pole of the permanent magnet on the same side surface are alternately distributed along the circumference, if the inner arc side is provided with the N pole T-shaped permanent magnet, and the outer arc is provided with the S pole T-shaped permanent magnet. On the contrary, if the N-pole T-shaped permanent magnet is arranged on the outer arc side, the S-pole T-shaped permanent magnet is arranged on the inner arc side, and the staggered embedding is beneficial to reducing the magnetic resistance of a magnetic circuit and increasing the strength of the eddy current generated by induction.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (5)
1. A permanent magnet eddy current coupling is characterized by comprising a conductor unit and a permanent magnet unit, wherein the conductor unit and the permanent magnet unit are coaxially arranged, and an air gap is arranged in the middle of the conductor unit and the permanent magnet unit;
the conductor unit comprises a conductor back iron disc (2) and a conductor disc (3); the permanent magnet unit comprises a permanent magnet (5), a permanent magnet back iron disc (6) and a permanent magnet mounting disc (8);
the conductor disc (3) is coaxially connected with the conductor back iron disc (2), and the conductor disc (3) is positioned on the air gap side;
the permanent magnet mounting disc (8) is coaxially connected with the permanent magnet back iron disc (6), and the permanent magnet mounting disc (8) is positioned on the air gap side;
the permanent magnets (5) are arranged at equal intervals along the circumferential direction of the permanent magnet mounting disc (8);
the permanent magnet (5) comprises an inner arc permanent magnet (501) and an outer arc permanent magnet (502), and the inner arc permanent magnet (501) and the outer arc permanent magnet (502) are both T-shaped;
the inner arc permanent magnets (501) are arranged along the inner circumference of the permanent magnet mounting disc (8) in an equal way, and the outer arc permanent magnets (502) are arranged along the outer circumference of the permanent magnet mounting disc (8);
the T-shaped horizontal sections of the inner arc permanent magnet (501) and the outer arc permanent magnet (502) are respectively close to the inner edge and the outer edge of the permanent magnet mounting disc (8);
the inner arc permanent magnets (501) and the outer arc permanent magnets (502) are arranged in a staggered mode; the polarity of the inner arc permanent magnet (501) is opposite to that of the outer arc permanent magnet (502).
2. A permanent magnet eddy current coupling according to claim 1, characterised in that the inner arc permanent magnets (501) and the outer arc permanent magnets (502) are of the same size.
3. A permanent magnet eddy current coupling according to claim 1 or 2, characterized by further comprising two flanges (1), said two flanges (1) being arranged outside the conductor back iron disc (2) and the permanent magnet back iron disc (6), respectively.
4. A permanent magnet eddy current coupling according to claim 1 or 2, characterized in that the number of inner arc permanent magnets (501) and outer arc permanent magnets (502) is the same and is an even number.
5. A permanent magnet eddy current coupling according to claim 1 or 2, characterized in that the polarity of the inner arc permanent magnets (501) and the outer arc permanent magnets (502) is axial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021366010.4U CN212231321U (en) | 2020-07-13 | 2020-07-13 | Permanent magnet eddy current coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021366010.4U CN212231321U (en) | 2020-07-13 | 2020-07-13 | Permanent magnet eddy current coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212231321U true CN212231321U (en) | 2020-12-25 |
Family
ID=73910872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021366010.4U Active CN212231321U (en) | 2020-07-13 | 2020-07-13 | Permanent magnet eddy current coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212231321U (en) |
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2020
- 2020-07-13 CN CN202021366010.4U patent/CN212231321U/en active Active
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