CN111884455A - Magnetic field modulation type magnetic coupling and industrial equipment - Google Patents

Magnetic field modulation type magnetic coupling and industrial equipment Download PDF

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Publication number
CN111884455A
CN111884455A CN202010618925.8A CN202010618925A CN111884455A CN 111884455 A CN111884455 A CN 111884455A CN 202010618925 A CN202010618925 A CN 202010618925A CN 111884455 A CN111884455 A CN 111884455A
Authority
CN
China
Prior art keywords
inner rotor
magnetic coupling
magnetic field
outer rotor
shaft
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
CN202010618925.8A
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Chinese (zh)
Inventor
李常文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goal Technology Shenzhen Co ltd
Original Assignee
Goal Technology Shenzhen Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Goal Technology Shenzhen Co ltd filed Critical Goal Technology Shenzhen Co ltd
Priority to CN202010618925.8A priority Critical patent/CN111884455A/en
Publication of CN111884455A publication Critical patent/CN111884455A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/02—Machines with one stator and two or more rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • 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
    • H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator

Abstract

The invention 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. Through the mode, the speed regulation and torque transmission between the inner rotor and the outer rotor can be realized, the transmission is stable and reliable, the abrasion is small, the processing and the manufacturing are simple, and the cost is low.

Description

Magnetic field modulation type magnetic coupling and industrial equipment
Technical Field
The invention relates to the technical field of magnetic transmission, in particular 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 invention provides a magnetic field modulation type magnetic coupling and industrial equipment, which can realize speed regulation and torque transmission between an inner rotor and an outer rotor, and have stable transmission and simple and convenient processing and manufacturing.
In order to solve the technical problems, the invention adopts a technical scheme that: 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 one embodiment of the invention, the inner rotor permanent magnets are arranged in a plurality, and two adjacent inner rotor permanent magnets are magnetized along the radial direction and the magnetizing directions are opposite.
According to one embodiment of the invention, the outer rotor permanent magnets are arranged in plurality, and two adjacent outer rotor permanent magnets are magnetized along the radial direction and the magnetizing directions are opposite.
According to one embodiment of the invention, the number of outer rotor permanent magnets is at least larger than the number of inner rotor permanent magnets.
According to one embodiment of the invention, the stator shaft comprises two fixing rings arranged at intervals and a plurality of fixing blocks arranged between the fixing rings and evenly distributed, a fixing groove is formed between every two adjacent fixing blocks, and the magnetic adjusting block is fixed in the fixing groove.
According to one embodiment of the invention, the inner rotor shaft comprises a body part and a convex ring arranged at one end of the body part, the inner rotor permanent magnet is arranged on the outer surface of the body part, and the convex ring is used for fixing the inner rotor permanent magnet.
According to one embodiment of the invention, the inner rotor shaft and the outer rotor shaft are made of magnetically conductive material.
According to one embodiment of the invention, the stator shaft is made of a non-magnetically conductive material.
According to one embodiment of the invention, the magnetic adjusting block is formed by laminating silicon steel sheets.
In order to solve the technical problem, the invention adopts another technical scheme that: 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 invention has the beneficial effects 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 a magnetic field modulation type magnetic coupling according to an embodiment of the present invention;
FIG. 4 is a side view of a magnetic field modulation type magnetic coupling in accordance with 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 apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first", "second" and "third" in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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 up, down, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the movement, and the like 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, referring 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 a 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 description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

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.
CN202010618925.8A 2020-06-30 2020-06-30 Magnetic field modulation type magnetic coupling and industrial equipment Pending CN111884455A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010618925.8A CN111884455A (en) 2020-06-30 2020-06-30 Magnetic field modulation type magnetic coupling and industrial equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010618925.8A CN111884455A (en) 2020-06-30 2020-06-30 Magnetic field modulation type magnetic coupling and industrial equipment

Publications (1)

Publication Number Publication Date
CN111884455A true CN111884455A (en) 2020-11-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010618925.8A Pending CN111884455A (en) 2020-06-30 2020-06-30 Magnetic field modulation type magnetic coupling and industrial equipment

Country Status (1)

Country Link
CN (1) CN111884455A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113315274A (en) * 2021-06-15 2021-08-27 郑州大学 Direct insertion type slot conductor variable magnetic pole magnetic field modulation composite motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113315274A (en) * 2021-06-15 2021-08-27 郑州大学 Direct insertion type slot conductor variable magnetic pole magnetic field modulation composite motor
CN113315274B (en) * 2021-06-15 2022-08-12 郑州大学 Direct insertion type slot conductor variable magnetic pole magnetic field modulation composite motor

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