CN107086760A - A Synchronous Composite Disc Magnetic Coupling - Google Patents

Abstract

The invention discloses a synchronous composite disc type magnetic coupling, which comprises an input end rotor and an output end rotor; the input end rotor comprises an input end flange plate, an input end component a, a connecting cylinder and an input end component b, the input end component b is symmetrical to the input end component a, and the input end component a, the connecting cylinder and the input end component b form a composite structure; the output end rotor comprises an output end component, a transition flange and an output end flange plate; the output end assembly is positioned in the connecting cylinder between the input end assembly a and the input end assembly b. The special symmetrical structure of the invention can eliminate the axial stress on the permanent magnet mounting disc, reduce the abrasion of stressed devices and prolong the service life of the coupler. The input end magnet mounting disc is of a composite structure, and radial torque is generated on two sides of the input end magnet mounting disc simultaneously, so that the transmission torque is about twice of that of the traditional structure, and when the radial space is limited, the transmission capacity of the disc type magnetic coupling is greatly improved.

Description

A Synchronous Composite Disc Magnetic Coupling

technical field

The invention relates to the technical field of mechanical engineering transmission, in particular to a synchronous composite disc magnetic coupling, which is mainly used in power transmission between motors and loads in metallurgy, petrochemical, oil refining, coal and other industries.

Background technique

The synchronous magnetic coupling transmits power through the coupling between magnetic fields, avoiding the mechanical contact between the motor and the load equipment. Compared with traditional mechanical couplings, synchronous magnetic couplings not only have the advantages of soft start, overload protection, vibration isolation, etc., but also have less strict requirements on neutrality during installation, and can tolerate large shaft alignment errors. Therefore, synchronous magnetic couplings have broad application prospects in metallurgy, petrochemical, oil refining, coal and other industries.

According to the structure, the synchronous magnetic coupling can be divided into two types: cylindrical (radial magnetic field) magnetic coupling and disc type (axial magnetic field) magnetic coupling. The principle of mutual attraction between opposite sexes uses the coupling effect between magnetic fields to transfer mechanical energy. The synchronous disc magnetic coupling is mainly composed of three parts: the driving disc connected to the motor shaft, the driven disc connected to the load shaft, and the permanent magnet embedded in the driving disc and the driven disc. The characteristic of this structure is that the poles of the permanent magnet The magnetization direction is axially magnetized, and the permanent magnets are axially distributed on the inner and outer rotors. The disadvantages of the existing disc magnetic couplings mainly focus on two aspects: first, there is always a large axial force between the driving disc and the driven disc. Increase the wear of the stressed device, affect its service life, and even cause axial displacement of the motor and load, resulting in axial vibration; the second is that when the radial space is limited, it cannot further improve the radial size by increasing the radial size. transmit torque.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the present invention designs a synchronous composite disc magnetic coupling, which can not only eliminate the axial force on the permanent magnet discs at both ends, prolong the service life of the coupling, but also can Effectively increase the transmission torque without increasing the radial volume.

In order to achieve the above object, the technical scheme of the present invention is as follows:

A synchronous composite disc magnetic coupling, including an input rotor and an output rotor; the input rotor is connected to a motor, and the output rotor is connected to a load;

The input end rotor includes an input end flange, an input end assembly a, a connection cylinder and an input end assembly b, the input end assembly a is connected to the input end assembly b through the connection cylinder, and the input end flange Connect the input end assembly a; the input end assembly a includes an end plate a, an outer permanent magnet a and a magnet mounting plate a, and the input end assembly b includes a magnet mounting plate b, an outer permanent magnet b and an end plate b; The input-end component b is symmetrical to the input-end component a, and the input-end component a, connecting cylinder and input-end component b form a composite structure; the input-end flange, input-end component a and input-end Component b is coaxial;

The output end rotor includes an output end assembly, a transition flange and an output end flange. The output end assembly includes a magnet mounting plate c, an inner permanent magnet and a magnet mounting plate d. The output end assembly is a single Disc structure; one side of the transition flange is coaxially assembled with the raised side of the magnet mounting disc c in the output end assembly, and the other side is coaxially connected with the output end flange;

The output end assembly is located in the connecting cylinder between the input end assembly a and the input end assembly b.

Further, the magnet mounting plate a is embedded with an outer permanent magnet a, the magnet mounting plate b is embedded with an outer permanent magnet b, and the magnet mounting plate c and magnet mounting plate d are embedded with an inner permanent magnet;

Further, the outer permanent magnet a, the outer permanent magnet b and the inner permanent magnet are all multi-pole permanent magnets, and the N and S polarities are arranged alternately.

Further, the back of the magnet mounting plate a is connected to the end plate a, and the back of the magnet mounting plate b is connected to the end plate b.

Further, the connecting cylinder, the end plate a and the end plate b are all made of non-magnetic materials.

Further, the outer diameters of the connecting cylinder, the end disc a and the end disc b are the same.

Compared with the prior art, the present invention has the following beneficial effects:

1. Compared with the traditional disk-type magnetic coupling, the unique symmetrical structure of the present invention can eliminate the axial force on the permanent magnet installation disk, reduce the wear of the force-bearing parts, and prolong the service life of the coupling.

2. The magnet mounting disk at the input end of the present invention is a composite structure, and radial torque is generated on both sides at the same time, so the transmission torque is about twice that of the traditional structure. When the radial space is limited, the disk magnetic coupling is greatly improved. The transmission capacity of the device.

Description of drawings

Figure 1 is a schematic diagram of the force of a traditional synchronous disc magnetic coupling.

Fig. 2 is a schematic diagram of force of the present invention.

Figure 3 is a blast view of the present invention.

Fig. 4 is a schematic diagram of the assembled structure of the present invention.

Fig. 5 is an axial sectional view of the present invention.

Fig. 6 is a front view of the end plate a of the present invention.

Fig. 7 is a front view of the magnet mounting disk c of the present invention.

In the figure: 1. Connecting cylinder, 2. End disc a, 3. Outer permanent magnet a, 4. End disc b, 5. Output end rotor, 6. Outer permanent magnet b, 7. Inner permanent magnet, 8. Input end Flange, 9, magnet mounting plate a, 10, magnet mounting plate c, 11, magnet mounting plate d, 12, transition flange, 13, output flange, 14, magnet mounting plate b, 15, end plate Positioning hole a, 16, positioning hole b of the end plate, 17, first step, 18, trapezoidal step groove, 19, positioning hole of the magnet mounting plate.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings. As shown in Figure 2-7, a synchronous composite disc magnetic coupling includes an input rotor and an output rotor 5; the input rotor is connected to the motor, and the output rotor 5 is connected to the load;

The input end rotor includes an input end flange 8, an input end assembly a, a connection cylinder 1 and an input end assembly b, the input end assembly a is connected to the input end assembly b through the connection cylinder 1, and the input end assembly The flange plate 8 is connected to the input end assembly a through the end plate positioning hole a15; the input end assembly a includes the end plate a2, the outer permanent magnet a3 and the magnet mounting plate a9, and the input end assembly b includes the magnet mounting plate b14 , the outer permanent magnet b6 and the end plate b4; the input end assembly b is symmetrical to the input end assembly a, and the input end assembly a, the connecting cylinder 1 and the input end assembly b form a composite structure; the input end assembly b The flange 8, the input end assembly a and the input end assembly b are coaxial;

The output rotor 5 includes an output assembly, a transition flange 12 and an output flange 13. The output assembly includes a magnet mounting disc c10, an inner permanent magnet 7 and a magnet mounting disc d11. The output The end assembly is a single disc structure; one side of the transition flange 12 is coaxially assembled with the raised side of the magnet mounting disc c10 in the output end assembly through the end plate positioning hole 19, and the other side is connected with the output end flange 13 coaxial connection;

The output end assembly is located in the connecting cylinder 1 between the input end assembly a and the input end assembly b.

Further, the magnet mounting disk a9 is embedded with the outer permanent magnet a3, the magnet mounting disk b14 is embedded with the outer permanent magnet b6, the magnet mounting disk c10 and the magnet mounting disk d11 are embedded with the inner permanent magnet 7;

Further, the outer permanent magnet a3, the outer permanent magnet b6 and the inner permanent magnet 7 are all multi-pole permanent magnets, and the N and S polarities are arranged alternately.

Further, the back of the magnet mounting plate a9 is connected to the end plate a2, and the back of the magnet mounting plate b14 is connected to the end plate b4.

Further, the input rotor fixes the axial position of the output rotor 5 through the positioning hole b16 of the end disk.

Further, the connecting cylinder 1, the end plate a2 and the end plate b4 are all made of non-magnetic materials.

Further, the outer diameters of the connecting cylinder 1 , the end disk a2 and the end disk b4 are the same.

The working principle of the present invention is as follows: the end plate is a magnetic isolation material, which can effectively prevent the overflow of magnetic induction lines and form a closed-loop magnetic circuit. When the magnet mounting disk a9 and the magnet mounting disk b14 rotate under the drive of the motor, they will drive the rotor 5 at the output end to rotate under the action of the magnetic force, so as to realize the non-contact transmission of torque. In the axial direction, the outer permanent magnet a3 and the outer permanent magnet b6 on the magnet mounting plate a9 and the magnet mounting plate b14 at the input end are simultaneously subjected to the magnetic force of the two inner permanent magnets 7 at the output end, which are equal in size and opposite in direction, and thus act on the outer permanent magnet. The resultant axial forces on the magnet a3 and the outer permanent magnet b6 cancel each other out. Similarly, the inner permanent magnets 7 on the magnet mounting plate c10 at the output end and the magnet mounting plate d11 are simultaneously subjected to the magnetic forces of the two outer permanent magnets at the input end that are equal in size and opposite in direction, and the resultant axial force is also zero.

Since the shape, size and magnetic field strength of the outer permanent magnet a3 and the outer permanent magnet b6 are consistent, and the magnetic poles are opposite in polarity. The gravitational force produced by the outer permanent magnet a3 and the outer permanent magnet b6 to the inner permanent magnet 7 on the output end rotor 5 of the center is only related to the distance between the two (the outer permanent magnet a3 and the outer permanent magnet b6) and the inner permanent magnet 7. After the synchronous composite disc magnetic coupling is assembled, the axial position of the output rotor 5 can be adjusted through the positioning hole b16 of the end disc so that the distance between the outer permanent magnet a3 and the inner permanent magnet 7 is equal to the distance between the outer permanent magnet b6 and the inner permanent magnet 7 distance. At this time, the axial attractive force generated by the outer permanent magnet a3 and the outer permanent magnet b6 on the output end rotor 5 is a magnetic force with equal magnitude and opposite direction, and the resultant force of the attractive force is zero. In the same way, according to Newton's third law, the outer permanent magnet a3 on the input rotor, and the outer permanent magnet b6 are also subject to the gravitational force from the inner permanent magnet 7 on the output rotor 5, and the gravitational forces are both equal in size and opposite in direction. force, the resultant axial force is also zero.

By eliminating the axial force, the wear of the stressed parts is greatly reduced and the service life of the coupling is extended. In addition, because the rotor at the input end is a composite structure, radial torque is generated on both sides at the same time, so the transmitted torque is about twice that of the traditional structure. When the radial space is limited, the transmission of the disc magnetic coupling is greatly improved. ability.

The installation process of the present invention is as follows:

1. Assemble the output rotor 5

The output end rotor 5 is composed of a magnet mounting plate c10, an inner permanent magnet 7, a magnet mounting plate d11, a transition flange 12 and an output end flange 13. The installation process of the rotor 5 at the output end is as follows:

Firstly, the inner permanent magnets 7 are respectively embedded in the stepped grooves 18 of the magnet mounting disc c10 and the magnet mounting disc d11 . During installation, it is necessary to ensure that the magnetic properties between the circumferentially adjacent inner permanent magnets 7 are opposite. Wherein, the magnet mounting disk c10 is a raised disk. The shape and size of the stepped and trapezoidal grooves 18 on the magnet mounting plate c10 and the magnet mounting plate d11 are the same, and the four vertices of the stepped and trapezoidal grooves 18 are provided with circular through holes to avoid stress concentration after the permanent magnet is embedded and damage the magnet mounting plate c10 With the strength of the magnet mounting disc d11.

Afterwards, the magnet mounting disk c10 embedded with the inner permanent magnet 7 is axially assembled with the magnet mounting disk d11 embedded with the inner permanent magnet 7 . The installation process ensures that the axially adjacent inner permanent magnets 7 on the two permanent magnet mounting plates are magnetically opposite. After installation, the first steps 17 of the stepped grooves 18 of the magnet mounting plate c10 and the magnet mounting plate d11 are all on the outside. The first step 17 of the stepped trapezoidal groove 18 acts as a baffle to prevent the inner permanent magnet 7 from falling off during high-speed movement.

Finally, the convex side of the magnet mounting disc c10 is coaxially assembled with the transition flange 12 . The other side of the transition flange 12 is connected to the output flange 13 . The transition flange 12 plays the role of transmitting torque. The assembly of the output end rotor 5 is completed through the above process.

2. Assemble the input rotor

The outer permanent magnet b6, the magnet mounting plate b14 and the end plate b4 together form the input end assembly b. The outer permanent magnet b6 is embedded in the stepped groove 18 of the magnet mounting disc b14 in the order of alternating N and S poles. The shape and size of the stepped groove of the magnet mounting plate b14 are the same as those of the stepped groove 18 of the magnet mounting plate c10. Then axially assemble the end disc b4 with the magnet mounting disc b14 embedded with the outer permanent magnet b6. During assembly, it is necessary to ensure that the first step 17 of the stepped groove 18 is on the side away from the end plate b4, so as to function as a baffle. Wherein, the inner diameter of the end disk b4 is larger than the outer diameter of the transition flange 12 to ensure that the output rotor 5 and the input rotor do not contact each other in the radial direction after the overall assembly is completed. The assembly of the input end component b is completed through the above process.

The input end assembly a is composed of an end plate a2, a magnet mounting plate a9 and an outer permanent magnet a3. Its assembly process is as follows:

Firstly, the outer permanent magnets a3 are embedded in the step-shaped groove 18 of the magnet mounting plate a9 in such a manner that N and S polarities are alternately arranged. Wherein, the shape and size of the stepped groove 18 on the magnet mounting disk a9 are the same as those of the stepped groove 18 on the magnet mounting disk c10.

Then the magnet mounting plate a9 of the outer permanent magnet a3 is installed coaxially with the end plate a2, and the first step 17 of the step trapezoidal groove 18 on the magnet mounting plate a9 is guaranteed to be on the side away from the end plate a2 during installation. The first step 17 of the stepped groove 18 also functions as a baffle. The assembly of the input end component a is completed through the above process.

Then assemble the connecting cylinder 1 coaxially with the input end assembly a. The connecting cylinder 1 and the magnet mounting disk a9 are on the same side of the end disk a2, and the outer diameter of the connecting cylinder 1 is the same as that of the end disk a2. The inner diameter of the connecting cylinder 1 is larger than the outer diameters of the magnet mounting disk c10 and the magnet mounting disk d11. The input end flange 8 is coaxially assembled with the end disk a2, and is respectively assembled with the magnet mounting disk a9 on both sides of the end disk a2.

Then the assembled output end rotor 5 is coaxially placed with the magnet mounting disk a9 (the two are not connected as a whole using any connecting piece, only placed axially), ensuring that the axially adjacent outer permanent magnets a3 and The magnetic poles of the inner permanent magnet 7 are opposite, that is, the two generate an attractive force in the axial direction. At this time, under the action of the opposite magnetic field of the outer permanent magnet a3 and the inner permanent magnet 7, the output rotor 5 will be adsorbed on the surface of the magnet mounting disk a9. When the synchronous composite disc magnetic coupling of the present invention is in operation, the rotor 5 at the output end needs to be completely separated from the rotor at the input end, that is, there is no contact between the two. Through the positioning hole b16 of the end disc and the positioning bolt, the output rotor 5 can be moved outward for a certain distance along the axis direction, and a gap is formed between the rotor 5 and the magnet mounting disc a9, which is called an air gap.

Then assemble the assembled input end assembly b coaxially with the unassembled side of the connecting cylinder 1 . During the assembly process, ensure that the magnet mounting plate b14 and the magnet mounting plate d11 are on the same side of the end plate b4, and it is necessary to ensure that the magnetic properties of the outer permanent magnet b6 and the inner permanent magnet 7 on the axially adjacent magnet mounting plate b14 are opposite, that is, in The two generate gravitational force on the axis. Similarly, the magnet mounting plate b14 is the same as the magnet mounting plate a9, and a positioning hole is reserved. The axial position of the output rotor 5 can be adjusted by adjusting the positioning bolts on the magnet mounting plate a9 and the magnet mounting plate b14, so that the distance between the magnet mounting plate a9 and the magnet mounting plate c10 is the same as the distance between the magnet mounting plate b14 and the magnet mounting plate d11 , that is, the left and right air gaps of the rotor 5 at the output end are the same. The assembly process of the synchronous composite disc magnetic coupling of the present invention is completed through the above steps. Moreover, the connecting cylinder 1 , the end plate a2 and the end plate b4 are all made of non-magnetic materials.

When the synchronous composite disc-type magnetic coupling of the present invention is in operation, it is necessary to remove the positioning bolts on the magnet mounting plate a9 and the magnet mounting plate b14 for fixing the axial position of the output rotor, so that the output rotor 5 is completely separated from the input rotor, The two connect only under the action of a magnetic field. Since the outer permanent magnet a3 and the outer permanent magnet b6 have the same shape and magnetic field strength, relative to the inner permanent magnet 7 on the rotor at the input end, the magnitude of the attractive force in the axial direction is only related to the distance. Because it is necessary to ensure that the distance between the magnet mounting disk a9 and the magnet mounting disk c10 is the same as the distance between the magnet mounting disk b14 and the magnet mounting disk d11 during assembly, the two groups of attractive forces acting on the inner permanent magnet 7 are equal in magnitude and opposite in direction. Acting together in the direction of the rotor axis at the input end, the resultant force is zero; similarly, the outer permanent magnet a3 and the outer permanent magnet b6 on the input end assembly a and input end assembly b are also subjected to the same axial force and opposite direction. Two sets of gravity. Under the combined action of the two sets of gravitational forces, the resultant axial force on the rotor 5 at the output end is also zero. From the design, the radial force generated by the traditional synchronous disc magnetic coupler after assembly will be avoided under the gravitational force of the left and right opposite magnetic fields, thereby improving the torque transmission capacity.

The invention reduces the loss of the magnetic field strength of the input end assembly and the output end assembly by increasing the end disks on both sides, thereby increasing the torque and transmission efficiency to a certain extent, and can be applied to occasions with high transmission efficiency and the like.

The present invention is not limited to this embodiment, and any equivalent ideas or changes within the technical scope disclosed in the present invention are listed in the protection scope of the present invention.

Claims (6)

1. A synchronous composite disc magnetic coupling, comprising an input rotor and an output rotor (5); the input rotor is connected to a motor, and the output rotor (5) is connected to a load; It is characterized in that: the input end rotor includes an input end flange (8), an input end assembly a, a connecting cylinder (1) and an input end assembly b, and the input end assembly a is connected through the connecting cylinder (1) The input end assembly b, the input end flange (8) is connected to the input end assembly a; the input end assembly a includes an end plate a (2), an outer permanent magnet a (3) and a magnet mounting plate a ( 9), the input end assembly b includes a magnet mounting plate b (14), an outer permanent magnet b (6) and an end plate b (4); the input end assembly b is symmetrical to the input end assembly a, and the The input end assembly a, the connecting cylinder (1) and the input end assembly b form a composite structure; the input end flange (8), the input end assembly a and the input end assembly b are coaxial; The output end rotor (5) includes an output end assembly, a transition flange (12) and an output end flange (13), and the output end assembly includes a magnet mounting plate c (10), an inner permanent magnet (7 ) and magnet mounting disc d (11), the output end assembly is a single disc structure; one side of the transition flange (12) and the raised side of the magnet mounting disc c (10) in the output end assembly Coaxial assembly, the other side is coaxially connected with the output end flange (13); The output end assembly is located in the connecting cylinder (1) between the input end assembly a and the input end assembly b. 2. A synchronous composite disc magnetic coupling according to claim 1, characterized in that: said magnet mounting plate a (9) is embedded with outer permanent magnet a (3), and magnet mounting plate b ( 14) The outer permanent magnet b (6) is embedded, and the magnet installation disk c (10) and the magnet installation disk d (11) are embedded with the inner permanent magnet (7). 3. A synchronous composite disc magnetic coupling according to claim 1, characterized in that: said outer permanent magnet a (3), outer permanent magnet b (6) and inner permanent magnet (7) All are multi-pole permanent magnets, with N and S polarities arranged alternately. 4. A synchronous composite disc magnetic coupling according to claim 1, characterized in that: the back of the magnet mounting plate a (9) is connected to the end plate a (2), and the magnet mounting plate b ( 14) The back is connected to the end disk b (4). 5. A synchronous composite disc magnetic coupling according to claim 1, characterized in that: the connecting cylinder (1), end disc a (2) and end disc b (4) are all made of non- Made of magnetic material. 6. A synchronous composite disc magnetic coupling according to claim 1, characterized in that: the outer diameters of the connecting cylinder (1), end disc a (2) and end disc b (4) are the same .