Synchronous permanent magnet coupling

Abstract

This utility model relates to a synchronous permanent magnet coupling, belonging to the field of couplings, including an outer permanent magnet rotor component (1) and an inner permanent magnet rotor component (2). The outer permanent magnet rotor component (1) includes an outer steel cylinder (11), and the inner permanent magnet rotor component (2) includes an inner steel cylinder (21). One end of the outer steel cylinder (11) and one end of the inner steel cylinder (21) are connected by a connecting plate (13), and the other end of the outer steel cylinder (11) and the other end of the inner steel cylinder (21) are connected by a stop positioning mechanism (3). Through the centering effect of the stop positioning, the two rotor components are kept concentric, which is convenient for installation. A gasket (23) is provided in the gap between the inner steel cylinder (21) and the outer steel cylinder (11), which solves the problems of easy wear and poor compatibility of traditional seals. The magnetic tiles are aligned and arranged, with accurate positioning, simple structure, fewer parts, and improved safety and reliability.

Description

Technical Field

[0001] This utility model belongs to the field of couplings, specifically, it relates to a synchronous permanent magnet coupling. Background Technology

[0002] The development of synchronous permanent magnet couplings originated in the 1940s, with the core design goal of solving the leakage and wear problems of traditional mechanical couplings. In 1946, the British company HMD first applied the principle of magnetic coupling to pump equipment, pioneering contactless power transmission. In the 1950s, Germany further optimized the cylindrical structure of permanent magnet couplings, achieving torque transmission through circumferentially alternating permanent magnets, significantly improving operational stability. In recent years, with the breakthrough development of rare earth permanent magnet materials, the power density and efficiency of permanent magnet couplings have been greatly improved, gradually replacing traditional mechanical couplings and becoming an important technology in the field of industrial transmission. The core design of synchronous permanent magnet couplings is based on the principle of like poles repelling and unlike poles attracting. Synchronous permanent magnet couplings achieve non-contact torque transmission through the attraction of like poles and the repulsion of unlike poles between the inner and outer rings of permanent magnets, and have already been widely applied in the field of magnetic pumps.

[0003] Since both the inner and outer rotors of a synchronous permanent magnet coupling are strongly magnetized, it is difficult to ensure the concentricity of the two rotors without tooling, making installation difficult.

[0004] Chinese patent CN104038020A, published on September 10, 2014, discloses a self-alignment protection device for permanent magnet couplings. This device positions two permanent magnet rotor components during installation using a tapered surface fit. After installation, the positioning tapered sleeve is moved to ensure non-contact transmission between the two permanent magnet rotor components. However, this structure suffers from uncontrollable displacement after installation, and the fixing method poses safety hazards. Utility Model Content

[0005] The present invention aims to provide a synchronous permanent magnet coupling that is accurate in positioning, simple in structure, and safe and reliable.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A synchronous permanent magnet coupling includes an outer permanent magnet rotor component and an inner permanent magnet rotor component. The outer permanent magnet rotor component includes an outer steel cylinder, and the inner permanent magnet rotor component includes an inner steel cylinder. A stop positioning structure is provided at one end of the outer steel cylinder and one end of the inner steel cylinder.

[0008] The stop positioning structure includes a first positioning surface and a second positioning surface. The outer steel cylinder end is provided with a first positioning surface, and the inner steel cylinder end is provided with a second positioning surface that mates with the first positioning surface. The other end of the outer steel cylinder and the other end of the inner steel cylinder are connected by a connecting plate, and a washer is provided between the inner steel cylinder and the outer steel cylinder.

[0009] The first positioning surface is a cylindrical surface, and a first conical surface is provided at the junction of the first positioning surfaces. The first positioning surface is located on the inner wall of the outer steel cylinder. The second positioning surface is a cylindrical surface, and a second conical surface is provided at the junction of the second positioning surfaces. The second positioning surface is located on the outer wall of the inner steel cylinder.

[0010] The inner surface of the outer steel cylinder is provided with a first permanent magnet, and the outer surface of the inner steel cylinder is provided with a second permanent magnet, with the first and second permanent magnets aligned.

[0011] The connecting plate has a first flange at one end, and the first flange is connected to a first equipment shaft; the inner steel cylinder has a second flange at one end, and the second flange is connected to a second equipment shaft.

[0012] The first equipment shaft is either a working machine shaft or a prime mover shaft, and the second equipment shaft is either a prime mover shaft or a working machine shaft.

[0013] The outer and inner steel cylinders are fitted with a clearance, and the ends of the inner and outer steel cylinders are connected by bolts.

[0014] The outer steel cylinder has screw holes on its outer surface.

[0015] The outer permanent magnet rotor component and the inner permanent magnet rotor component have chamfered inner and outer mating surfaces.

[0016] The outer steel cylinder and the inner steel cylinder are coaxially arranged.

[0017] The technical effects of this utility model are as follows:

[0018] The other end of the outer steel cylinder and the other end of the inner steel cylinder are connected by a stop positioning structure. The centering effect of the stop positioning structure keeps the two rotor components concentric, which facilitates installation. The magnetic tiles are aligned and arranged, which improves the torque transmission efficiency of the synchronous permanent magnet coupling transmission system and extends the service life of mechanical components such as bearings and seals. A half gasket is installed in the gap between the inner and outer steel cylinders, which solves the problems of easy wear and poor compatibility of traditional seals. The structure is simple, with fewer parts and accurate positioning, which improves safety and reliability. Attached Figure Description

[0019] This manual includes the following figures, which illustrate the following:

[0020] Figure 1 This is a sectional view of a synchronous permanent magnet coupling before installation.

[0021] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0022] Figure 3This is a sectional view of a synchronous permanent magnet coupling after installation.

[0023] Figure 4 for Figure 3 Enlarged view of part B in the middle section.

[0024] Figure 5 for Figure 1 Assembly diagram of the foreign permanent magnet rotor components and the internal permanent magnet rotor components.

[0025] Figure 6 for Figure 1 Schematic diagram of the internal permanent magnet rotor component.

[0026] Figure 7 for Figure 1 Schematic diagram of permanent magnet rotor components from China and abroad.

[0027] Figure 8 for Figure 1 Schematic diagram of the inner steel cylinder structure.

[0028] Figure 9 for Figure 1 Schematic diagram of steel cylinder structure in China and abroad.

[0029] The components in the diagram are labeled as follows: 1. Outer permanent magnet rotor component; 2. Inner permanent magnet rotor component; 3. Stop positioning structure; 4. First positioning surface; 5. Second positioning surface; 6. Screw hole; 11. Outer steel cylinder; 12. First permanent magnet; 13. Connecting disc; 14. First flange; 21. Inner steel cylinder; 22. Second permanent magnet; 23. Washer; 25. Bolt; 26. Second flange; 27. First conical surface; 28. Second conical surface. Detailed Implementation

[0030] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of this utility model, and to facilitate its implementation.

[0031] like Figure 1 , Figure 3 , Figure 5 , Figure 8 and Figure 9As shown, a synchronous permanent magnet coupling includes an outer permanent magnet rotor component 1 and an inner permanent magnet rotor component 2. The outer permanent magnet rotor component 1 includes an outer steel cylinder 11, and the inner permanent magnet rotor component 2 includes an inner steel cylinder 21. One end of the outer steel cylinder 11 and one end of the inner steel cylinder 21 are connected by a connecting plate 13. The other ends of the outer steel cylinder 11 and the inner steel cylinder 21 are provided with a stop positioning structure 3. Through the centering effect of the stop positioning structure 3, a mechanical reference is formed, restricting the radial displacement of the rotor, so that the two rotor components remain concentric, preventing the permanent magnet from being eccentric or rubbing against the stator core due to assembly errors. The stop is designed as a precision-machined conical surface or stepped structure, and positioning is achieved through clearance fit. The outer steel cylinder 11 and the inner steel cylinder 21 are connected by the connecting plate 13.

[0032] like Figure 2 and Figure 4 As shown, the stop positioning structure 3 includes a first positioning surface 4 and a second positioning surface 5. The outer steel cylinder 11 has a first positioning surface 4 at its end, and the inner steel cylinder 21 has a second positioning surface 5 at its end that mates with the first positioning surface 4. The other end of the outer steel cylinder 11 and the other end of the inner steel cylinder 21 are connected by a connecting plate 13. A washer 23 is provided between the inner steel cylinder 21 and the outer steel cylinder 11. The inner steel cylinder 21 and the outer steel cylinder 11 are connected by bolts 25. After installation, the flanges on both sides are radially positioned and the motor and working machine are fixed. The bolts 25 are loosened, and the inner steel cylinder 21 is moved backward with a lifting screw. A washer 23 is added between the inner steel cylinder 21 and the outer steel cylinder 11. The washer 23 is a half washer. The half washer, through the optimized combination of material and structure, solves the problems of easy wear and poor adaptability of traditional seals, and has the effect of quick installation and convenient maintenance.

[0033] The first positioning surface 4 is a cylindrical surface, and a first conical surface 27 is provided at the junction of the first positioning surfaces 4 and 5. The first positioning surface 4 is located on the inner wall of the outer steel cylinder 11. The second positioning surface 5 is a cylindrical surface, and a second conical surface 28 is provided at the junction of the second positioning surfaces 4 and 5. The second positioning surface 5 is located on the outer wall of the inner steel cylinder 21. The stop positioning mechanism 3 includes a first positioning surface 4 and a second positioning surface 5. The second positioning surface 5 is embedded in the first positioning surface 4. The first positioning surface 4 is a cylindrical surface, and a first conical surface 27 is provided at the junction of the first positioning surfaces 4 and 5. The first positioning surface 4 is located on the inner wall of the outer steel cylinder 11. The second positioning surface 5 is a cylindrical surface, and a second conical surface 28 is provided at the junction of the second positioning surfaces 5 and 5. The second positioning surface 5 is located on the outer wall of the inner steel cylinder 21. The cylindrical surfaces of the first positioning surface 4 and the second positioning surface 5 are in contact with each other, achieving preliminary radial alignment. The end faces of the inner steel cylinder 21 and the outer steel cylinder 11 are in contact, limiting axial displacement and achieving a centering effect. The conical surfaces at the first positioning surface 4 and the second positioning surface 5 facilitate installation.

[0034] like Figure 6 and Figure 7As shown, the inner surface of the outer steel cylinder 11 is provided with a first permanent magnet 12, and the outer surface of the inner steel cylinder 21 is provided with a second permanent magnet 22, with the first permanent magnet 12 and the second permanent magnet 22 aligned. The inner surface of the outer steel cylinder 11 is provided with a plurality of first permanent magnets 12 arranged in a certain pattern, and the outer surface of the inner steel cylinder 21 is provided with a plurality of second permanent magnets 22 arranged in a certain pattern. The first permanent magnets 12 are installed on the inner surface of the outer steel cylinder 11 by embedded installation or bonding. A washer 23 is added between the inner steel cylinder 21 and the outer steel cylinder 11 to disengage the original positioning stop, and the magnetic tiles on the outer steel cylinder 11 and the inner steel cylinder 21 are aligned. The bolts 25 are then tightened.

[0035] A first flange 14 is provided at one end of the connecting plate 13, and the first flange 14 is connected to a first equipment shaft; a second flange 26 is provided at one end of the inner steel cylinder 21, and the second flange 26 is connected to a second equipment shaft. The first flange 14 is connected to both the connecting plate 13 and the first equipment shaft, and the second flange 26 is connected to both the inner steel cylinder 21 and the second equipment shaft. The first equipment shaft is either a working machine shaft or a prime mover shaft, and the second equipment shaft is either a working machine shaft or a prime mover shaft.

[0036] The first equipment shaft is either the working machine shaft or the prime mover shaft, and the second equipment shaft is either the prime mover shaft or the working machine shaft. The outer permanent magnet rotor component 1 can be installed on the working machine shaft as a driven component. In this case, the first flange 14 is radially positioned and fixes the working machine, and the outer steel cylinder 11 is installed on the working machine shaft as a driven component through the connecting plate 13 and the first flange 14. At this time, the second flange 26 is radially positioned and fixes the motor, and the inner steel cylinder 21 is installed on the prime mover shaft through bolts connecting the inner steel cylinder 21 and the second flange 26. The outer permanent magnet rotor component 1 can be installed on the prime mover shaft as the active component. At this time, the first flange 14 is radially positioned and fixes the motor. The outer steel cylinder 11 is the active component and is connected to the connecting plate 13. The connecting plate 13 is connected to the first flange 14. The outer steel cylinder 11 is installed on the prime mover shaft. At this time, the second flange 26 is radially positioned and fixes the working machine. The inner steel cylinder 21 is the driven component and is bolted to the second flange 26. The inner permanent magnet rotor component 2 is installed on the working machine shaft.

[0037] The outer steel cylinder 11 and the inner steel cylinder 21 are fitted with a clearance fit, and the ends of the inner steel cylinder 21 and the outer steel cylinder 11 are connected by bolts 25. The inner diameter of the outer steel cylinder 11 and the outer diameter of the inner steel cylinder 21 are fitted with an H7 / h6 tolerance, which is beneficial for the two rotor components to maintain concentricity.

[0038] The outer steel cylinder 11 has screw holes 6 on its outer surface. Screw holes 6 are process screw holes for lifting to prevent damage to the permanent magnet coupling from human movement. There are two screw holes 6, which are symmetrical and have a better concentric effect.

[0039] The outer permanent magnet rotor component 1 and the inner permanent magnet rotor component 2 have chamfered mating surfaces. The chamfers remove burrs and sharp edges, preventing scratches on the permanent magnet surface coating or insulating sleeve during installation and ensuring the integrity of the magnetic circuit. The chamfers also eliminate stress concentration points at right angles on the mating surfaces through a smooth transition, ensuring uniform load distribution along the rotor circumference and improving fatigue resistance. During high-speed rotation, the chamfered structure can suppress turbulent vibrations at the rotor edges.

[0040] The outer steel cylinder 11 and the inner steel cylinder 21 are coaxially arranged. This ensures that the outer permanent magnet rotor component 1 and the inner permanent magnet rotor component 2 remain concentric, eliminating axial force, reducing mechanical wear, and extending the equipment's lifespan.

[0041] The working principle of this utility model is as follows: A synchronous permanent magnet coupling includes an outer permanent magnet rotor component 1 and an inner permanent magnet rotor component 2. The outer permanent magnet rotor component 1 includes an outer steel cylinder 11, with a first permanent magnet 12 disposed on the inner surface of the outer steel cylinder 11. The inner permanent magnet rotor component 2 includes an inner steel cylinder 21, with a second permanent magnet 22 disposed on the outer surface of the inner steel cylinder 21. The first permanent magnet 12 and the second permanent magnet 22 are arranged in a magnetic tile alignment manner, which improves the torque transmission efficiency of the synchronous permanent magnet coupling transmission system and extends the service life of mechanical components such as bearings and seals. One end of the inner steel cylinder 21 is connected to the outer steel cylinder 11 via a connecting plate 13. The connecting plate 13 is connected to a first flange 14, which is connected to a first equipment shaft. The inner steel cylinder 21 is connected to a second flange 26, which is connected to a second equipment shaft. The other end of the outer steel cylinder 11 is connected to the other end of the inner steel cylinder 21 via a stop positioning mechanism 3. The centering effect of the stop positioning mechanism 3 keeps the two rotor components concentric, facilitating installation. A half gasket is provided in the gap between the inner steel cylinder 21 and the outer steel cylinder 11, which solves the problems of easy wear and poor compatibility of traditional seals.

[0042] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A synchronous permanent magnet coupling, characterized in that: It includes an outer permanent magnet rotor component (1) and an inner permanent magnet rotor component (2). The outer permanent magnet rotor component (1) includes an outer steel cylinder (11), and the inner permanent magnet rotor component (2) includes an inner steel cylinder (21). A stop positioning structure (3) is provided at one end of the outer steel cylinder (11) and one end of the inner steel cylinder (21).

2. The synchronous permanent magnet coupling according to claim 1, characterized in that: The stop positioning structure (3) includes a first positioning surface (4) and a second positioning surface (5). The first positioning surface (4) is provided at the end of the outer steel cylinder (11), and the second positioning surface (5) that cooperates with the first positioning surface (4) is provided at the end of the inner steel cylinder (21). The other end of the outer steel cylinder (11) and the other end of the inner steel cylinder (21) are connected by a connecting plate (13). A washer (23) is provided between the inner steel cylinder (21) and the outer steel cylinder (11).

3. A synchronous permanent magnet coupling according to claim 2, characterized in that: The first positioning surface (4) is a cylindrical surface, and a first conical surface (27) is provided at the junction of the first positioning surfaces (4). The first positioning surface (4) is located on the inner wall of the outer steel cylinder (11). The second positioning surface (5) is a cylindrical surface, and a second conical surface (28) is provided at the junction of the second positioning surfaces (5). The second positioning surface (5) is located on the outer wall of the inner steel cylinder (21).

4. A synchronous permanent magnet coupling according to claim 3, characterized in that: The inner surface of the outer steel cylinder (11) is provided with a first permanent magnet (12), and the outer surface of the inner steel cylinder (21) is provided with a second permanent magnet (22). The first permanent magnet (12) and the second permanent magnet (22) are aligned.

5. A synchronous permanent magnet coupling according to any one of claims 2-4, characterized in that: The connecting plate (13) is provided with a first flange (14) at one end, and the first flange (14) is connected to a first equipment shaft; the inner steel cylinder (21) is provided with a second flange (26) at one end, and the second flange (26) is connected to a second equipment shaft.

6. A synchronous permanent magnet coupling according to claim 5, characterized in that: The first equipment shaft is either a working machine shaft or a prime mover shaft, and the second equipment shaft is either a prime mover shaft or a working machine shaft.

7. A synchronous permanent magnet coupling according to any one of claims 1-4, characterized in that: The outer steel cylinder (11) and the inner steel cylinder (21) are fitted with a clearance fit, and the ends of the inner steel cylinder (21) and the outer steel cylinder (11) are connected by bolts (25).

8. A synchronous permanent magnet coupling according to any one of claims 1-4, characterized in that: The outer steel cylinder (11) has screw holes (6) on its outer surface.

9. A synchronous permanent magnet coupling according to any one of claims 1-4, characterized in that: The outer permanent magnet rotor component (1) and the inner permanent magnet rotor component (2) have chamfered inner and outer mating surfaces.

10. A synchronous permanent magnet coupling according to any one of claims 1-4, characterized in that: The outer steel cylinder (11) and the inner steel cylinder (21) are coaxially arranged.

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