CN212627609U

CN212627609U - Magnetic field modulation type magnetic coupling and industrial equipment

Info

Publication number: CN212627609U
Application number: CN202021249714.3U
Authority: CN
Inventors: 李常文
Original assignee: Goal Technology Shenzhen Co ltd
Current assignee: Goal Technology Shenzhen Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-02-26
Anticipated expiration: 2030-06-30

Abstract

The utility model discloses a magnetic field modulation type magnetic coupling and industrial equipment. The magnetic field modulation type magnetic coupling includes: the inner rotor comprises a hollow inner rotor shaft and an inner rotor permanent magnet circumferentially attached to the outer surface of the inner rotor shaft, the outer rotor comprises a hollow outer rotor shaft and an outer rotor permanent magnet circumferentially attached to the inner surface of the outer rotor shaft, and the stator comprises a hollow stator shaft and magnetic adjusting blocks uniformly distributed along the circumferential direction of the stator shaft. In this way, the utility model discloses can realize speed regulation and torque transmission between inner rotor and the outer rotor, the transmission is reliable and stable, wearing and tearing are little and manufacturing is simple, with low costs.

Description

Magnetic field modulation type magnetic coupling and industrial equipment

Technical Field

The utility model relates to a magnetic drive technical field especially relates to a magnetic field modulation type magnetic coupling and industrial equipment.

Background

The magnetic gear mainly adopts a dual-rotor structure and a magnetic field modulation structure, and realizes the change of torque and speed and the transmission of energy based on the difference of the number of pole pairs of permanent magnets of the rotor. The double-rotor structure is similar to a mechanical gear, a permanent magnet replaces the mechanical gear to realize mechanical transmission, and a magnetic field modulation type magnetic gear utilizes magnetic resistance transformation to achieve variable-speed transmission. At present, a magnetic field modulation type gear generally adopts a rotor with a convex structure, is difficult to process and manufacture, has high manufacturing cost, is unstable in transmission in a high-speed motion occasion, and is easy to cause mechanical abrasion.

Disclosure of Invention

The utility model provides a magnetic field modulation type magnetic coupling and industrial equipment can realize speed regulation and torque transmission between the interior outer rotor, and the transmission is stable and manufacturing is simple and convenient.

In order to solve the technical problem, the utility model discloses a technical scheme be: provided is a magnetic field modulation type magnetic coupling including: the inner rotor, the stator and the outer rotor are coaxially arranged from inside to outside along the radial direction, a first air gap is arranged between the inner rotor and the stator, a second air gap is arranged between the outer rotor and the stator, the inner rotor comprises a hollow inner rotor shaft and an inner rotor permanent magnet which is circumferentially attached to the outer surface of the inner rotor shaft in a surface-mounted mode, the outer rotor comprises a hollow outer rotor shaft and an outer rotor permanent magnet which is circumferentially attached to the inner surface of the outer rotor shaft in a surface-mounted mode, and the stator comprises a hollow stator shaft and magnetic adjusting blocks which are circumferentially and uniformly distributed along the stator shaft.

According to the utility model discloses an embodiment, the inner rotor permanent magnet sets up a plurality ofly, adjacent two the inner rotor permanent magnet is along radially magnetizing and the opposite direction that magnetizes.

According to the utility model discloses an embodiment, the outer rotor permanent magnet sets up a plurality ofly, adjacent two the outer rotor permanent magnet is along radially magnetizing and magnetizing opposite direction.

According to an embodiment of the present invention, the number of outer rotor permanent magnets is at least greater than the number of inner rotor permanent magnets.

According to the utility model discloses an embodiment, the stator shaft includes two solid fixed rings that the interval set up and locates a plurality of evenly distributed's between the solid fixed ring fixed block, adjacent two be formed with the fixed slot between the fixed block, the magnetic tuning block is fixed in the fixed slot.

According to the utility model discloses an embodiment, the inner rotor axle includes this somatic part and locates the bulge loop of this somatic part one end, the inner rotor permanent magnet is located the surface of this somatic part, the bulge loop is used for fixing the inner rotor permanent magnet.

According to the utility model discloses an embodiment, the inner rotor axle with the outer rotor shaft adopts magnetic material to make.

According to an embodiment of the present invention, the stator shaft is made of a non-magnetic material.

According to the utility model discloses an embodiment, the accent magnetic path is folded by the silicon steel sheet and is pressed and form.

For solving the technical problem, the utility model discloses a another technical scheme is: there is provided an industrial apparatus comprising: the magnetic coupling, with first mechanism and second mechanism that magnetic coupling connects, first mechanism with the second mechanism passes through magnetic coupling adjusts slew velocity.

The utility model has the advantages that: the permanent magnets are attached to the outer surface of the inner rotor and the inner surface of the outer rotor and interact with the middle magnetic adjusting block to realize speed adjustment and torque transmission between the inner rotor and the outer rotor, and the permanent magnets are stable and reliable in transmission, small in abrasion, simple in processing and manufacturing and low in cost.

Drawings

Fig. 1 is an exploded schematic view of a magnetic field modulation type magnetic coupling according to a first embodiment of the present invention;

fig. 2 is an exploded schematic view of a magnetic field modulation type magnetic coupling according to a second embodiment of the present invention;

fig. 3 is a front view of the magnetic field modulation type magnetic coupling according to the embodiment of the present invention;

fig. 4 is a side view of a magnetic field modulation type magnetic coupling according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

fig. 6 is a block diagram of an industrial device according to an embodiment of the present invention.

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 in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The terms "first", "second" and "third" in the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. All directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1 to 4, the magnetic coupling 100 includes an inner rotor 10, a stator 20, and an outer rotor 30 coaxially and radially arranged from inside to outside, wherein a first air gap 40 is reserved between the inner rotor 10 and the stator 20, and a second air gap 50 is reserved between the outer rotor 30 and the stator 20. The inner rotor 10 includes a hollow inner rotor shaft 11 and an inner rotor permanent magnet 12 circumferentially attached along an outer surface of the inner rotor shaft 11, the outer rotor 30 includes a hollow outer rotor shaft 31 and an outer rotor permanent magnet 32 circumferentially attached along an inner surface of the outer rotor shaft 31, and the stator 20 includes a hollow stator shaft 21 and magnetic field adjusting blocks 22 uniformly distributed circumferentially along the stator shaft 21.

The inner rotor shaft 11 and the outer rotor shaft 31 of the present embodiment are made of a magnetic conductive material, and preferably, the inner rotor shaft 11 is formed by laminating silicon steel sheets, and the outer rotor shaft 31 is formed by laminating silicon steel sheets. The magnetic adjusting block 22 is made of a magnetic conductive material, and preferably, the magnetic adjusting block 22 is formed by laminating silicon steel sheets.

The stator shaft 21 is made of a non-magnetic conductive material. Referring to fig. 2, the stator shaft 21 includes two fixing rings 211 disposed at intervals and a plurality of fixing blocks 212 disposed between the fixing rings 211 and uniformly distributed, a fixing groove 213 is formed between two adjacent fixing blocks 212, and the magnetic adjustment block 22 is fixed in the fixing groove 213. The stator shaft 21 of the present embodiment is configured to be similar to a squirrel cage structure, so that the magnetic adjusting block 22 is more firmly fixed on the stator shaft 21, thereby enabling the magnetic coupling 100 to stably and reliably operate.

Further, referring to fig. 2, the inner rotor shaft 11 includes a body portion 111 and a protruding ring 112 disposed at one end of the body portion 111, the inner rotor permanent magnet 12 is disposed on an outer surface of the body portion 111, and the protruding ring 112 is used for fixing the inner rotor permanent magnet 12.

Furthermore, the number of the inner rotor permanent magnets 12 is multiple, the inner rotor permanent magnets 12 are uniformly attached to the outer surface of the inner rotor shaft 11, and two adjacent inner rotor permanent magnets 12 are magnetized along the radial direction and the magnetizing directions are opposite.

Further, a plurality of outer rotor permanent magnets 32 are arranged, and the plurality of outer rotor permanent magnets 32 are uniformly attached to the outer surface of the outer rotor shaft 31, referring to fig. 4 and 5, an air gap is reserved between two adjacent outer rotor permanent magnets 32, and the two adjacent outer rotor permanent magnets 32 are magnetized along the radial direction and the magnetizing directions are opposite.

The number of outer rotor permanent magnets 32 of the present embodiment is at least larger than the number of inner rotor permanent magnets 12. When the inner rotor 10 rotates under the action of external force, a rotating magnetic field is generated in the second air gap 50, and the rotating magnetic field is modulated by the modulation magnetic blocks 22 to form harmonic frequencies with the same number as the outer rotor permanent magnets 32 and drive the outer rotor 30 to move. When the outer rotor 30 rotates under the action of external force, a rotating magnetic field is generated in the first air gap 40, and the rotating magnetic field is modulated by the modulation magnet 22 to form harmonic frequencies with the same number as the inner rotor permanent magnets 12 and drive the inner rotor 10 to move. The rotating speed of the outer rotor 30 is greater than that of the inner rotor 10, the torque of the outer rotor 30 is less than that of the inner rotor 10, speed adjustment and torque transmission are achieved between the outer rotor 30 and the inner rotor 10 through modulation of the middle magnetic adjusting block 20, transmission is stable and reliable, abrasion is small, machining and manufacturing are simple, and cost is low.

The magnetic coupling 100 of the present embodiment has the following main dimensional parameters, that is, the inner radius and the outer radius of the inner rotor shaft 11 are respectively 8mm and 10mm, the radial thickness of the inner rotor permanent magnet 12 is 2mm, and the inner radius and the outer radius of the outer rotor 30 are respectively 18mm and 20 mm. The radial thickness of the outer rotor permanent magnet 32 is 2 mm. The radial thickness of the fixed ring 211 and the magnet adjusting block 22 is 3mm, and the radial thickness of the first air gap 40 and the radial thickness of the second air gap 50 are both 0.5 mm. The axial lengths of the inner rotor permanent magnet 12, the outer rotor permanent magnet 32 and the magnetic adjusting block 22 are 22 mm. Experimental test results showed that when the rotation speed of the inner rotor 10 was 44rmp, the reverse rotation speed of the outer rotor 30 was 16rmp and the output torque was 1.3NM, and the torque ripple was 1%.

Fig. 6 is a block diagram of an industrial device according to an embodiment of the present invention, please refer to fig. 6, the industrial device 200 includes the magnetic coupling 100, a first mechanism 210 and a second mechanism 220, the first mechanism 210 is connected to the inner rotor 10 of the magnetic coupling 100, the second mechanism 220 is connected to the outer rotor 30 of the magnetic coupling 100, and the first mechanism 210 and the second mechanism 220 adjust the rotation speed through the magnetic coupling 100.

Specifically, when the first mechanism 210 drives the inner rotor 10 to rotate, the magnetic field modulation effect of the magnetic coupling 100 drives the outer rotor 30 and the second mechanism 220 connected to the outer rotor 30 to move. When the second mechanism 220 drives the outer rotor 30 to rotate, the inner rotor 10 and the first mechanism 210 connected to the inner rotor 10 are driven to move by the magnetic field modulation effect of the magnetic coupling 100.

The above is only the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A magnetic field modulation type magnetic coupling, comprising: the inner rotor, the stator and the outer rotor are coaxially arranged from inside to outside along the radial direction, a first air gap is arranged between the inner rotor and the stator, a second air gap is arranged between the outer rotor and the stator, the inner rotor comprises a hollow inner rotor shaft and an inner rotor permanent magnet which is circumferentially attached to the outer surface of the inner rotor shaft in a surface-mounted mode, the outer rotor comprises a hollow outer rotor shaft and an outer rotor permanent magnet which is circumferentially attached to the inner surface of the outer rotor shaft in a surface-mounted mode, and the stator comprises a hollow stator shaft and magnetic adjusting blocks which are circumferentially and uniformly distributed along the stator shaft.

2. The magnetic field modulation type magnetic coupling of claim 1, wherein a plurality of inner rotor permanent magnets are provided, and adjacent two inner rotor permanent magnets are magnetized in a radial direction and opposite to each other.

3. The magnetic field modulation type magnetic coupling according to claim 1, wherein a plurality of outer rotor permanent magnets are provided, and two adjacent outer rotor permanent magnets are magnetized in a radial direction and in opposite directions.

4. The magnetic field modulated magnetic coupling of claim 1, wherein the number of outer rotor permanent magnets is at least greater than the number of inner rotor permanent magnets.

5. The magnetic field modulation type magnetic coupling according to claim 1, wherein the stator shaft includes two fixing rings disposed at intervals and a plurality of fixing blocks disposed between the fixing rings and uniformly distributed, a fixing groove is formed between two adjacent fixing blocks, and the magnetic tuning block is fixed in the fixing groove.

6. The magnetic field modulation-type magnetic coupling of claim 1, wherein the inner rotor shaft includes a body portion and a protruding ring provided at one end of the body portion, the inner rotor permanent magnet being provided on an outer surface of the body portion, the protruding ring being configured to fix the inner rotor permanent magnet.

7. The magnetic field modulation type magnetic coupling of claim 1, wherein the inner rotor shaft and the outer rotor shaft are made of a magnetically conductive material.

8. The magnetic field modulated magnetic coupling of claim 1 wherein the stator shaft is made of a non-magnetically conductive material.

9. The magnetic field modulation type magnetic coupling according to claim 1, wherein the magnet modulation block is laminated by silicon steel sheets.

10. An industrial apparatus, comprising the magnetic coupling according to any one of claims 1 to 9, a first mechanism and a second mechanism connected to the magnetic coupling, wherein the first mechanism and the second mechanism adjust a rotation speed through the magnetic coupling.