CN112311197B - A 90°Halbach Arrangement Double-layer Permanent Magnet Rotor Magnetic Coupler - Google Patents
A 90°Halbach Arrangement Double-layer Permanent Magnet Rotor Magnetic Coupler Download PDFInfo
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- CN112311197B CN112311197B CN202011037915.1A CN202011037915A CN112311197B CN 112311197 B CN112311197 B CN 112311197B CN 202011037915 A CN202011037915 A CN 202011037915A CN 112311197 B CN112311197 B CN 112311197B
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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
- H02K49/10—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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Abstract
本发明涉及机械工程中的传动技术领域，具体是一种90°Halbach排布双层永磁转子磁力耦合器。所述磁力耦合器可以将改变主动转子和从动转子之间的气隙厚度与改变两永磁体盘间的相对转动角度两种方式复合进行调速。或改变两永磁体盘间的相对转动角度或两者复合进行调速。双层复合永磁体转子中的一个永磁体盘采用铝制外壳将其包裹，与另一个永磁体盘隔开，并留有3‑5mm间距，以实现两永磁体盘之间的相对转动，从而改变磁力线走向，改变双层复合永磁体转子与导体转子之间的磁感应强度，从而改变传递转矩达到无级调速的目的。
The invention relates to the technical field of transmission in mechanical engineering, in particular to a 90°Halbach arrangement double-layer permanent magnet rotor magnetic coupler. The magnetic coupler can adjust the speed by a combination of changing the thickness of the air gap between the driving rotor and the driven rotor and changing the relative rotation angle between the two permanent magnet disks. Or change the relative rotation angle between the two permanent magnet discs or combine the two for speed regulation. One permanent magnet disk in the double-layer composite permanent magnet rotor is wrapped with an aluminum casing, and is separated from the other permanent magnet disk with a 3‑5mm gap to achieve relative rotation between the two permanent magnet disks, thereby Change the direction of the magnetic line of force, change the magnetic induction intensity between the double-layer composite permanent magnet rotor and the conductor rotor, thereby changing the transmission torque to achieve the purpose of stepless speed regulation.
Description
Technical Field
The invention relates to the technical field of transmission in mechanical engineering, in particular to a transmission device for realizing torque transmission through non-contact connection, and specifically relates to a 90-degree Halbach distributed double-layer permanent magnet rotor magnetic coupler. The stepless speed regulation of the load can be realized by adjusting the thickness of an air gap between the double-layer composite permanent magnet rotor and the conductor rotor or changing the relative rotation angle between the two permanent magnet disks or combining the two permanent magnet disks.
Background
In recent years, with the development of permanent magnetic materials, the structure of a magnetic coupler has been proposed to replace the conventional speed adjusting device. The magnetic coupler is mainly applied to various mechanical equipment such as various fans, water pumps, material conveyors, bucket elevators, ball mills, windmills, crushers, mixers, straightening machines and the like.
The magnetic coupler generates electromagnetic torque by means of electromagnetic induction to achieve the purpose of transmission, realizes contactless transmission of force and torque by the magnetic field coupling effect in the air gap, and has the advantages of contactless transmission, overload protection effect and high transmission efficiency compared with the traditional hydraulic coupler, wherein the stepless speed regulation of the load can be realized by regulating the thickness of the air gap between the driving rotor and the driven rotor under the condition of no shutdown of the speed regulation type magnetic coupler.
A magnetic coupler capable of adjusting speed by adjusting the thickness of an air gap between a driving rotor and a driven rotor or changing the relative rotation angle between two permanent magnet disks is disclosed in a document 'Analysis ON a novel magnetic coupler with a double-layer permanent magnet rotor' published in the journal of IEEE TRANSACTIONS ON MAGNETICS.A permanent magnet disk is formed by arranging permanent magnet blocks at intervals, a yoke iron block is arranged between N, S poles of permanent magnets, and the permanent magnets adopt a circumferential magnetizing method. The two permanent magnet disks are not separated by a shell, so that the two disks are easily sucked and cannot rotate relatively.
Disclosure of Invention
Aiming at the technical problem, the invention provides a 90-degree Halbach-distributed double-layer permanent magnet rotor magnetic coupler which can be used for carrying out speed regulation by combining two modes of changing the thickness of an air gap between a driving rotor and a driven rotor and changing the relative rotation angle between two permanent magnet discs. One permanent magnet disc in the double-layer composite permanent magnet rotor is wrapped by an aluminum shell and is separated from the other permanent magnet disc by a distance of 3-5mm, so that the two permanent magnet discs rotate relatively, the trend of magnetic lines of force is changed, and the magnetic induction intensity between the double-layer composite permanent magnet rotor and the conductor rotor is changed.
A90 degree Halbach distributed double layer permanent magnet rotor magnetic coupler is composed of a double layer composite permanent magnet rotor and a conductor rotor, wherein the double layer composite permanent magnet rotor is composed of two permanent magnet disks capable of rotating relatively, the arrangement mode of the two permanent magnet disks is 90 degree Halbach array, the magnetization direction in one period is left, up, right and down, the arrangement mode can enhance the axial magnetic density of the working air gap of the coupler, transmit larger torque and improve the utilization rate of the permanent magnet, one permanent magnet disk is embedded in an aluminum shell and fixed on a second yoke iron disk by welding, the other permanent magnet disk is embedded in a groove of an outer connecting ring, the outer connecting ring is made of aluminum, the magnetic conductivity is similar to that of air and can not be separated, the two disks are separated by the aluminum shell and have a 3-5mm interval so as to rotate relatively, thereby changing the trend of the magnetic force lines, changing the magnetic induction intensity between the double-layer composite permanent magnet rotor and the conductor rotor; the conductor rotor comprises a first yoke iron disc and a conductor ring, the conductor ring can be a squirrel cage conductor ring or a solid conductor ring, the conductor ring is tightly attached to the first yoke iron disc through welding, and a yoke iron material in the conductor rotor is made of soft magnetic ferrite, so that the axial magnetic density of a working air gap can be effectively enhanced, and the transmission torque is improved. Due to the electromagnetic induction principle, the double-layer composite permanent magnet rotor can be used as an active end to drive the conductor rotor to rotate, and vice versa.
The first method is to change the thickness of an air gap between a permanent magnet disc embedded in a groove of an outer connecting ring in a double-layer composite permanent magnet rotor and a conductor ring in a conductor rotor, change the magnetic induction intensity of a working air gap and carry out speed regulation, wherein when the thickness of the air gap is smaller, the magnetic induction intensity at the working air gap is higher, and the transmitted torque is higher; the second is that the relative rotation angle between two permanent magnet discs in the double-layer composite permanent magnet rotor is changed, and the magnetic induction intensity of a working air gap is changed at the same time, so as to carry out speed regulation, when the two permanent magnet discs do not rotate relatively, the magnetization directions of the permanent magnets at corresponding positions on the two permanent magnet discs are the same, the magnetic induction intensity at the working air gap is the maximum, the torque which can be transmitted is the maximum, and the starting situation is the moment; when the permanent magnet disc embedded in the aluminum shell rotates by a corresponding circle center angle of a permanent magnet relative to another permanent magnet disc on the basis of the initial condition, the magnetic induction intensity at a working air gap is smaller than that under the initial condition, and the transmitted torque is reduced; when the permanent magnet disc embedded in the aluminum shell rotates relative to the other permanent magnet disc by the angle of the corresponding circle centers of the two permanent magnets on the basis of the initial condition, the magnetic induction intensity at the working air gap is minimum, and the transmitted torque is minimum. During speed regulation, the relative positions of the two permanent magnet rotors can be changed from the initial positions of the two permanent magnet disks with the same permanent magnet magnetization direction to the positions of one permanent magnet rotor rotating relative to the other permanent magnet disk by the corresponding circle center angles of the two permanent magnets, so that the speed regulation is realized through the change of the relative rotation angle between the two permanent magnet disks; and the third is to compound speed regulation by simultaneously changing the thickness of the air gap and the relative rotation angle.
The mechanism that can make two permanent magnet discs rotate relatively is as follows: the permanent magnet dish of embedding in aluminium system shell is connected with the driving shaft through the key on the second yoke iron dish through welded fastening, and the permanent magnet dish of embedding in outer go-between recess is connected with the sleeve through the welding, and the shifting block round pin is in contact cooperation with the straight flute wall of telescopic chute wall and driving shaft, and the shifting block is installed on the shifting block round pin, can promote the shifting block round pin and remove about, changes the relative rotational position between two permanent magnet dishes simultaneously.
The invention has the advantages that: (1) the invention combines two modes of changing the thickness of the air gap between the driving rotor and the driven rotor and changing the relative rotation angle between the two permanent magnet discs for speed regulation, and can more accurately carry out stepless speed regulation on the load. (2) One permanent magnet disc in the double-layer composite permanent magnet rotor is wrapped by an aluminum shell and is separated from the other permanent magnet disc by a distance of 3-5mm, so that the two permanent magnet discs can rotate relative to each other without being adsorbed mutually, and the safety of equipment is ensured. (3) The permanent magnet rotor is arranged in a 90-degree Halbach mode, so that the axial magnetic density of a working air gap of the coupler can be enhanced, larger torque is transmitted, and the utilization rate of the permanent magnet is improved. (4) The yoke material of the conductor rotor adopts soft magnetic ferrite, which can effectively enhance the axial magnetic density at the working air gap and improve the transmission torque.
Drawings
The invention is further described with reference to the following figures and examples.
Fig. 1 is a schematic view of the working principle and the structural section of a 90-degree Halbach double-layer permanent magnet rotor magnetic coupler according to an embodiment.
Fig. 2 is a 1/4 sectional view of a three-dimensional structure of a 90-degree Halbach arrangement double-layer permanent magnet rotor magnetic coupler according to an embodiment.
Fig. 3 is a schematic cross-sectional view of a rotor of an embodiment of a double-layer composite permanent magnet, an aluminum housing and a conductor rotor.
Figure 4 is a top view of the permanent magnet disk of the embodiment in a 90 Halbach arrangement.
Fig. 5(a) is a magnetic flux line direction diagram of the same magnetization direction of the permanent magnets at the corresponding positions of the two permanent magnet disks in the embodiment.
Fig. 5(b) is a magnetic line course diagram when two permanent magnet discs of the embodiment rotate relative to one permanent magnet by an angle corresponding to the center of a circle on the basis of the initial condition.
Fig. 5(c) is a magnetic line course diagram when the two permanent magnet discs of the embodiment relatively rotate by the corresponding angle of the circle centers of the two permanent magnets on the basis of the initial condition.
Fig. 6(a) is a schematic three-dimensional structure diagram of a permanent magnet rotor and a conductor rotor in which the magnetization directions of the permanent magnets of the two permanent magnet disks at corresponding positions are the same according to the embodiment.
Fig. 6(b) is a schematic three-dimensional structure diagram of the permanent magnet rotor and the conductor rotor when the two permanent magnet disks of the embodiment rotate relative to one permanent magnet by an angle corresponding to the center of a circle on the basis of the initial condition.
Fig. 6(c) is a schematic three-dimensional structure diagram of the permanent magnet rotor and the conductor rotor when the two permanent magnet discs of the embodiment rotate relative to the two permanent magnets by corresponding circle center angles on the basis of the initial condition.
Fig. 7 is a three-dimensional exploded view of the combined double-layered composite permanent magnet rotor, aluminum housing, and conductor rotor of the example.
Fig. 8 is a three-dimensional assembly view of the combined double-layered composite permanent magnet rotor, aluminum housing, and conductor rotor of an embodiment.
Fig. 9(a) is a three-dimensional assembly view of the solid disc conductor rotor of the embodiment.
Fig. 9(b) is a three-dimensional assembly diagram of the squirrel cage disc type conductor rotor of the embodiment.
Fig. 10 is a three-dimensional structure view of an outer connection ring of the embodiment.
Fig. 11 is a three-dimensional structural view of a rotating shaft of the embodiment.
Fig. 12 is a three-dimensional structural view of the sleeve of the embodiment.
1-conductor ring 2-first yoke iron plate 3-driven shaft 4-key 5-aluminum shell 6-external connecting ring 7-sleeve 8-key 9-driving shaft 10-shifting block 11-shifting block pin 12-second yoke iron plate 13-first permanent magnet plate 14-second permanent magnet plate
Detailed Description
As shown in fig. 1 and 2, the rotating end I includes a double-layer composite permanent magnet rotor, an aluminum housing 5, an outer connecting ring 6, a second yoke iron disc 12, a sleeve 7, a driving shaft 9, a shifting block 10, and a shifting block pin 11, as shown in fig. 3 and 4, the double-layer composite permanent magnet rotor is formed by compounding two permanent magnet discs which are arranged by 90 degrees Halbach and can rotate relatively, the magnetization direction of a first permanent magnet disc 13 in one period is magnetized according to the left, upper, right, and lower directions, the first permanent magnet disc 13 is embedded in the aluminum housing 5, the second permanent magnet disc 14 is embedded in a groove of the outer connecting ring 6, the two discs are separated by the aluminum housing 5 and leave a distance of 3-5mm for relative rotation, thereby changing the trend, changing the magnetic induction intensity between the permanent magnet disc embedded in the groove of the outer connecting ring in the permanent magnet rotor and the conductor ring in the conductor rotor, the first permanent magnet disc 13 is fixed on the back face of the second yoke iron disc 12 through welding of the aluminum shell 5 and the second yoke iron disc 12, the second yoke iron disc 12 is connected with the driving shaft 9 through the key 8, the second permanent magnet disc 14 is embedded in the groove of the outer connecting ring 6, the outer connecting ring 6 is connected with the sleeve 7 through welding, the inclined groove wall of the sleeve 7 and the straight groove wall of the driving shaft 9 are in contact fit with the shifting block pin 11, the shifting block 10 is installed on the shifting block pin 11, the shifting block pin 11 is pushed to move left and right, and meanwhile the relative rotation position between the two permanent magnet discs is changed.
The rotating end II comprises a conductor rotor and a driven shaft 3, the conductor rotor is composed of a first yoke iron disc 2 and a conductor ring 1, the conductor ring 1 can be a squirrel cage conductor ring or a solid conductor ring, the conductor ring 1 is tightly attached to the first yoke iron disc 2 through welding, the yoke iron disc 2 is connected with the driven shaft 3 through a key 4, and the yoke iron material is soft magnetic ferrite, so that the magnetic induction intensity at a working air gap can be effectively enhanced, and the transmission torque is improved.
Fig. 5 is a schematic three-dimensional structure diagram of a double-layer composite permanent magnet rotor and a conductor rotor under different conditions. As shown in fig. 5(a), it is a schematic diagram of a three-dimensional structure of a double-layer composite permanent magnet rotor and a conductor rotor in an initial condition, where the permanent magnet magnetization directions of two permanent magnet disks at corresponding positions are the same. As shown in fig. 5(b), the three-dimensional structure of the first permanent magnet disc 13 embedded in the aluminum casing is schematically shown when the first permanent magnet disc 13 rotates by an angle corresponding to a center of a circle of a permanent magnet relative to the second permanent magnet disc 14 on the basis of the initial condition, and as shown in fig. 5(c), the three-dimensional structure of the first permanent magnet disc 13 embedded in the aluminum casing is schematically shown when the first permanent magnet disc 13 rotates by an angle corresponding to a center of a circle of two permanent magnets relative to the second permanent magnet disc 14 on the basis of the initial condition.
The invention has three speed regulation modes, the first mode is to change the thickness of an air gap between a second permanent magnet disc 14 embedded in a groove of an outer connecting ring in a double-layer composite permanent magnet rotor and a conductor ring in a conductor rotor, simultaneously change the magnetic induction intensity of a working air gap and regulate the speed, and when the thickness of the air gap is smaller, the magnetic induction intensity at the working air gap is higher, and the transmitted torque is higher; the second is to change the relative rotation angle between two permanent magnet discs in the double-layer composite permanent magnet rotor and change the magnetic induction intensity of the working air gap at the same time, and to perform speed regulation, as shown in fig. 6(a), when there is no relative rotation between the two permanent magnet discs, the magnetization directions of the permanent magnets at the corresponding positions on the two permanent magnet discs are the same, the magnetic induction intensity at the working air gap is the maximum, the torque that can be transmitted is the maximum, and the starting situation is the moment; as shown in fig. 6(b), when the first permanent magnet disc 13 embedded in the aluminum housing rotates by an angle corresponding to the center of a circle of a permanent magnet relative to the second permanent magnet disc 14 on the basis of the initial condition, the magnetic induction intensity at the working air gap is smaller than that at the initial condition, and the torque that can be transmitted is reduced; as shown in fig. 6(c), when the first permanent magnet disc 13 embedded in the aluminum housing rotates relative to the second permanent magnet disc 14 by the corresponding circle center angle of the two permanent magnets on the basis of the initial condition, the magnetic induction intensity at the working air gap is minimum, and the torque which can be transmitted is minimum. During speed regulation, the relative positions of the two permanent magnet rotors can be changed from the initial positions of the two permanent magnet disks with the same permanent magnet magnetization direction to the positions of one permanent magnet rotor rotating relative to the other permanent magnet disk by the corresponding circle center angles of the two permanent magnets, so that the speed regulation is realized through the change of the relative rotation angle between the two permanent magnet disks; and the third is to compound speed regulation by simultaneously changing the thickness of the air gap and the relative rotation angle. As shown in fig. 7 and 8, the first permanent magnet disc 13 is embedded in the aluminum casing 5, and the second permanent magnet disc 14 is separated from the first permanent magnet disc 13 by the aluminum casing 5 with a distance of 3-5mm, so as to rotate relatively, thereby changing the magnetic flux direction and changing the magnetic induction intensity between the second permanent magnet disc 14 and the conductor ring 1 in the conductor rotor.
As shown in fig. 9, the conductor rotor is composed of a first yoke disc 2 and a conductor ring 1, the conductor ring 1 can be a squirrel cage conductor ring or a solid conductor ring, the conductor ring 1 is tightly attached to the first yoke disc 2 by welding, the first yoke disc 2 is connected with the driven shaft 3 by a key 4, and the yoke material is soft magnetic ferrite, which can effectively enhance the magnetic induction intensity at the working air gap and improve the transmission torque.
As shown in fig. 10, which is a three-dimensional structure diagram of the outer connection ring 6, the outer connection ring 14 has a groove in the outer connection ring for fixing the second permanent magnet disc 14, the outer connection ring is connected with the sleeve 7 by welding, the outer connection ring 6 is made of aluminum, the magnetic permeability is similar to that of air, and the magnetic lines of force are not cut off, so that the transmission of the magnetic field between the double-layer composite permanent magnet rotor and the conductor rotor is not affected.
As shown in fig. 11 and 12, which are three-dimensional structural diagrams of the driving shaft 9 and the sleeve 7, a first permanent magnet plate 13 embedded in an aluminum shell is fixed on a second yoke plate 12 through welding and connected with the driving shaft 9 through a key 8, a second permanent magnet plate 14 embedded in a groove of an outer connecting ring is connected with the sleeve 7 through welding, a shifting block pin 11 is in contact fit with a chute wall of the sleeve 7 and a straight chute wall of the driving shaft 9, and a shifting block 10 is installed on the shifting block pin 11 and can push the shifting block pin 11 to move left and right and change the relative rotation position between the two permanent magnet plates.
Claims (4)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011037915.1A CN112311197B (en) | 2020-09-28 | 2020-09-28 | A 90°Halbach Arrangement Double-layer Permanent Magnet Rotor Magnetic Coupler |
| PCT/CN2021/075183 WO2022062302A1 (en) | 2020-09-28 | 2021-02-04 | 90° halbach-arranged double-layer permanent magnet rotor magnetic coupler |
| GB2111704.9A GB2596237B (en) | 2020-09-28 | 2021-02-04 | Magnetic coupler with double-layer permanent magnet rotor in 90° Halbach arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011037915.1A CN112311197B (en) | 2020-09-28 | 2020-09-28 | A 90°Halbach Arrangement Double-layer Permanent Magnet Rotor Magnetic Coupler |
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| Publication Number | Publication Date |
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| CN112311197A CN112311197A (en) | 2021-02-02 |
| CN112311197B true CN112311197B (en) | 2021-12-21 |
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| CN202011037915.1A Active CN112311197B (en) | 2020-09-28 | 2020-09-28 | A 90°Halbach Arrangement Double-layer Permanent Magnet Rotor Magnetic Coupler |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112311197B (en) * | 2020-09-28 | 2021-12-21 | 江苏大学 | A 90°Halbach Arrangement Double-layer Permanent Magnet Rotor Magnetic Coupler |
| CN114710004B (en) * | 2022-04-29 | 2024-08-30 | 河南理工大学 | A composite magnetic-concentrating permanent magnet-superconducting coupling transmission device for cryogenic pumps |
| CN116054447A (en) * | 2022-12-26 | 2023-05-02 | 核工业理化工程研究院 | A double-layer Halbach array ironless permanent magnet motor and its manufacturing method |
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| WO2022062302A1 (en) | 2022-03-31 |
| CN112311197A (en) | 2021-02-02 |
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Effective date of registration: 20240220 Address after: 1003, Building A, Zhiyun Industrial Park, No. 13 Huaxing Road, Henglang Community, Dalang Street, Longhua District, Shenzhen City, Guangdong Province, 518000 Patentee after: Shenzhen Wanzhida Technology Transfer Center Co.,Ltd. Country or region after: China Address before: Zhenjiang City, Jiangsu Province, 212013 Jingkou District Road No. 301 Patentee before: JIANGSU University Country or region before: China |
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Effective date of registration: 20240712 Address after: 211600 Jinhu County Industrial Park, Huaian City, Jiangsu Province, No. 8 Huancheng West Road Patentee after: JIANGSU JINGONG TECHNOLOGY GROUP Co.,Ltd. Country or region after: China Address before: 1003, Building A, Zhiyun Industrial Park, No. 13 Huaxing Road, Henglang Community, Dalang Street, Longhua District, Shenzhen City, Guangdong Province, 518000 Patentee before: Shenzhen Wanzhida Technology Transfer Center Co.,Ltd. Country or region before: China |