Outer rotor and inner rotor of permanent magnet coupling

Abstract

The utility model discloses an outer rotor and an inner rotor of a permanent magnet coupling, which are convenient for permanent magnet steel installation, and is characterized in that the outer rotor is formed by connecting an outer rotor cover plate and at least two outer rotor monomers, each outer rotor monomer is respectively provided with an outer rotor permanent magnet bearing bush monomer, and an outer rotor permanent magnet ring is formed by the outer rotor permanent magnet bearing bush monomers; the inner rotor is formed by connecting an inner rotor cover plate and at least two inner rotor monomers; each inner rotor monomer is provided with an inner rotor permanent magnet bearing bush monomer and forms an inner rotor permanent magnet ring; according to the utility model, the structure is simple, the outer rotor and the inner rotor are changed from an integral structure into a split structure and are connected, the problem of difficulty in installation of the permanent magnet steel is solved, and meanwhile, the permanent magnet coupling becomes a modular combined structure working unit, so that the adjusting range of the set working torque of the permanent magnet coupling is greatly increased; the workload of product design is reduced, the universality of products is greatly improved, spare parts of customers are standardized, and inventory management is simplified.

Description

Technical Field

[0001] The utility model relates to the field of permanent magnet couplings, specifically a cylindrical synchronous permanent magnet coupling, and more particularly to an outer rotor and an inner rotor of a permanent magnet coupling on which permanent magnet steels are conveniently installed. Background Art

[0002] Permanent magnetic couplings do not require direct mechanical connection, but use the interaction between rare earth permanent magnets and the characteristics of magnetic fields that can penetrate a certain spatial distance and material materials to transmit mechanical energy. They are widely used in sealed transmission machinery in chemical, electroplating, papermaking, pharmaceutical, food, vacuum and other industries. Permanent magnetic couplings are divided into two categories: synchronous and asynchronous. The synchronous type uses the attraction (or repulsion) force between permanent magnets to achieve non-rigid connection synchronous transmission, and is mainly used as a torque limiting safety coupling. The asynchronous type uses the magnetic-electric-magnetic induction force between permanent magnets and conductors to achieve non-rigid connection asynchronous transmission. Structurally, there are two types: disc type and barrel type. Disc type permanent magnetic couplings have axial force between two annular magnets. When the power is large, the axial force is very large, and it is difficult to overcome it, so it is generally less used. In order to avoid additional axial force after installation, a barrel structure is generally used. The barrel type permanent magnetic coupling is generally installed between the high-speed shaft of the reducer and the motor shaft. The main features are to improve the starting performance of the motor, realize overload protection, isolate torsional vibration, and protect the motor.

[0003] Document 1 (patent number 201721409313.8) discloses a high-speed synchronous permanent magnet coupling, which includes a coaxially arranged first flange sleeve, an outer rotor, and a coaxially arranged second flange sleeve and an inner rotor. The first flange sleeve and the outer rotor are coaxially positioned through a first positioning sleeve, and the second flange sleeve and the inner rotor are coaxially positioned through a second positioning sleeve. The outer rotor is a cylindrical structure, and its inner wall surface is provided with an outer rotor permanent magnet steel. The inner rotor is a cylindrical structure with a flange flange, and the outer wall surface of the cylindrical part is provided with an inner rotor permanent magnet steel.

[0004] Since the outer rotor and the inner rotor are integral structures, and the permanent magnets are split structures, they need to be assembled piece by piece on the outer wall surface of the inner rotor and the inner wall surface of the outer rotor. During assembly, the mutual attraction and repulsion between the permanent magnets bring inconvenience to the assembly of the outer rotor and the inner rotor, especially when the inner rotor and the outer rotor are axially longer, the assembly of the permanent magnets becomes more difficult, and the longer the axial length, the more complicated the assembly process. Summary of the invention

[0005] The utility model aims to provide an outer rotor and an inner rotor of a permanent magnetic coupling and a cylindrical synchronous permanent magnetic coupling, wherein the permanent magnetic steel on the outer rotor and the inner rotor is convenient to install.

[0006] The utility model adopts the following technical scheme to achieve its invention purpose, an outer rotor and an inner rotor of a permanent magnet coupling, the outer rotor is formed by connecting an outer rotor cover plate and at least two outer rotor monomers, each outer rotor monomer is respectively provided with an outer rotor permanent magnet bearing monomer to form an outer rotor permanent magnet ring, the inner rotor is formed by connecting an inner rotor cover plate and at least two inner rotor monomers, each inner rotor monomer is respectively provided with an inner rotor permanent magnet bearing monomer to form an inner rotor permanent magnet ring.

[0007] In order to fix the outer rotor cover plate and each outer rotor monomer and the inner rotor cover plate and each inner rotor monomer, and radially position them, the outer rotor cover plate of the utility model is connected to the adjacent outer rotor monomer and other adjacent outer rotor monomers as a whole through radial positioning rings and connecting screws, and the inner rotor cover plate is connected to the adjacent inner rotor monomer and other adjacent inner rotor monomers as a whole through radial positioning rings and connecting screws; each outer rotor permanent magnet bearing shell monomer is embedded in the corresponding inner wall of the outer rotor monomer to form an outer rotor permanent magnet ring, and the inner rotor monomer and the inner rotor cover plate are provided with radial positioning buckles, and each inner rotor permanent magnet bearing shell monomer is installed on the corresponding inner rotor monomer outer wall through the radial positioning buckle to form an inner rotor permanent magnet ring.

[0008] In order to position the outer rotor permanent magnet bearing shell monomer and the inner rotor permanent magnet bearing shell monomer and prevent them from radial rotation, the utility model provides 1 / 4 arc holes on the axially adjacent corners of the outer rotor permanent magnet bearing shell monomers, so that semicircular holes are formed at the adjacent positions of the two outer rotor permanent magnet bearing shell monomers, and the positioning pin holes are formed together with the corresponding semicircular holes on the outer rotor monomers; the inner rotor permanent magnet bearing shell monomers are provided with 1 / 4 arc holes on the axially adjacent corners of the two inner rotor permanent magnet bearing shell monomers, so that semicircular holes are formed at the adjacent positions of the two inner rotor permanent magnet bearing shell monomers, and the positioning pin holes are formed together with the corresponding semicircular holes on the inner rotor monomers.

[0009] In order to ensure the coaxial positioning of the outer rotor and the inner rotor during installation and operation, the utility model provides at least three outer rotor positioning grooves on the end surface of the outer rotor monomer away from one end of the outer rotor cover plate, an outer rotor positioning bearing is installed in each outer rotor positioning groove, and the outer ring of the outer rotor positioning bearing contacts the outer surface of the inner rotor cover plate; at least three inner rotor positioning grooves are provided on the end surface of the inner rotor monomer away from one end of the inner rotor cover plate, an inner rotor positioning bearing is installed in each inner rotor positioning groove, and the outer ring of the inner rotor positioning bearing contacts the inner surface of the outer rotor cover plate.

[0010] The outer rotor locating bearing of the utility model is installed in the outer rotor locating groove through the locating shaft, and the locating shaft is fixed to the outer rotor monomer through fixing screws; the inner rotor locating bearing is installed in the inner rotor locating groove through the locating shaft, and the locating shaft is fixed to the inner rotor monomer through fixing screws.

[0011] The outer rotor locating bearing and the inner rotor locating bearing of the utility model are deep groove ball bearings.

[0012] Due to the adoption of the above technical scheme, the utility model achieves the purpose of the invention better. It has a simple structure, and the outer rotor and the inner rotor are connected by a split structure instead of an integral structure, which solves the problem of difficult installation of permanent magnetic steel. At the same time, the permanent magnetic coupling becomes a modular combined structural working unit. The free combination of working units with different set working torques greatly increases the adjustment range of the set working torque of the permanent magnetic coupling, reduces the workload of product design, greatly improves the versatility of the product, standardizes customer spare parts, and simplifies inventory management. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 yes Figure 1 AA section view;

[0015] Figure 3 yes Figure 1 BB cross-sectional view;

[0016] Figure 4 yes Figure 1 An enlarged schematic diagram of point I;

[0017] Figure 5 is a schematic structural diagram of the inner rotor in the working unit b of Example 1 of the present invention;

[0018] Figure 6 yes Figure 5 CC section view;

[0019] Figure 7 is a schematic structural diagram of the outer rotor in the working unit b of Example 1 of the present invention;

[0020] Figure 8 yes Figure 7 DD cross-sectional view.

[0021] 1. Driving end sleeve 2. Outer rotor 3. Outer rotor cover 4. Inner rotor 5. Connecting screws 6. Outer rotor monomer 7. Outer rotor permanent magnet bearing monomer 8. Inner rotor monomer 9. Radial positioning buckle 10. Radial positioning ring 11. Inner rotor permanent magnet bearing monomer 12. Fixing screws 13. Outer rotor positioning groove 14. Outer rotor positioning bearing 15. Positioning shaft 16. Inner rotor cover 17. Driven end sleeve 18. Positioning pin 19. Semicircular hole. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments. Example 1

[0023] Depend on Figures 1 to 8 It can be seen that a permanent magnet coupling has an outer rotor and an inner rotor, wherein the outer rotor 2 is formed by connecting an outer rotor cover plate 3 and at least two outer rotor monomers 6, each outer rotor monomer 6 is respectively provided with an outer rotor permanent magnet bearing monomer 7 to form an outer rotor permanent magnet ring, and the inner rotor 4 is formed by connecting an inner rotor cover plate 16 and at least two inner rotor monomers 8, each inner rotor monomer 8 is respectively provided with an inner rotor permanent magnet bearing monomer 11 to form an inner rotor permanent magnet ring.

[0024] In order to fix the outer rotor cover plate 3 and each outer rotor monomer 6 and the inner rotor cover plate 16 and each inner rotor monomer 8, and to radially position them, the outer rotor cover plate 3 of the utility model is connected to the adjacent outer rotor monomer 6 and other adjacent outer rotor monomers 6 as a whole through a radial positioning ring 10 and a connecting screw 5, and the inner rotor cover plate 16 is connected to the adjacent inner rotor monomer 8 and other adjacent inner rotor monomers 8 as a whole through a radial positioning ring 10 and a connecting screw 5; each outer rotor permanent magnet bearing shell monomer 7 is embedded in the inner wall of the corresponding outer rotor monomer 6 to form an outer rotor permanent magnet ring, and the inner rotor monomer 8 and the inner rotor cover plate 16 are provided with radial positioning buckles 9, and each inner rotor permanent magnet bearing shell monomer 11 is installed on the outer wall of the corresponding inner rotor monomer 8 through the radial positioning buckle 9 to form an inner rotor permanent magnet ring.

[0025] In order to position the outer rotor permanent magnet bearing monomer 7 and the inner rotor permanent magnet bearing monomer 11 and prevent them from radial rotation, the utility model provides 1 / 4 arc holes on the axially adjacent corners of the outer rotor permanent magnet bearing monomer 7, so that semicircular holes 19 are formed at the adjacent positions of the two outer rotor permanent magnet bearing monomers 7, and positioning pin holes are formed with the corresponding semicircular holes on the outer rotor monomer 6; the inner rotor permanent magnet bearing monomer 11 is provided with 1 / 4 arc holes on the axially adjacent corners of the two inner rotor permanent magnet bearing monomers 11, so that semicircular holes 19 are formed at the adjacent positions of the two inner rotor permanent magnet bearing monomers 11, and positioning pin holes are formed with the corresponding semicircular holes on the inner rotor monomer 8.

[0026] When assembling the outer rotor 2 in this embodiment, it includes the following steps:

[0027] Step 1: Each outer rotor permanent magnet bearing shell monomer 7 is sequentially embedded in the inner wall of the first outer rotor monomer 6 along the axial direction, and two outer rotor permanent magnet bearing shell monomers 7 that are centrally symmetrical are fixed with positioning pins 18;

[0028] Step 2: Position one end of the second outer rotor monomer 6 through the radial positioning ring 10 and connect the screws 5 to install it on the other end of the first outer rotor 6, then embed each outer rotor permanent magnet bearing shell monomer 11 one by one on the inner wall of the second outer rotor monomer 6 in axial order, and fix the two outer rotor permanent magnet bearing shell monomers 7 symmetrically with the positioning pins 18;

[0029] In steps 1 and 2, if Figure 7 , Figure 8As shown, in order to position the outer rotor permanent magnet bearing monomer 7 and prevent its radial movement and displacement, the positioning pin 18 is inserted into the positioning pin hole on the outer rotor permanent magnet bearing monomer 7 and the corresponding outer rotor monomer 6. In this embodiment, four positioning pins 18 are used to fix two outer rotor permanent magnet bearing monomers 7 that are symmetrical in center.

[0030] Step 3: Repeat step 2 according to the number of outer rotor monomers 6 determined by the design, and connect the outer rotor monomers 6 in sequence; finally, the outer rotor cover plate 3 is positioned by the radial positioning ring 10 and connected with the screws 5 to install it on the last outer rotor monomer 6, so that the outer rotor cover plate 3 and the outer rotor monomers 6 are integrally connected to form the outer rotor 2, and the outer rotor permanent magnet bearing monomers 7 form the outer rotor permanent magnet ring;

[0031] In step 3, the outer rotor monomers 6 of this embodiment are three, and the corresponding outer rotor permanent magnet bearing shell monomers 7 are three groups, such as Figure 1 As shown, the outer rotor 2 is assembled from right to left from the end close to the driven end sleeve 17.

[0032] When assembling the inner rotor 4 in this embodiment, it includes the following steps:

[0033] Step 4: Install each inner rotor permanent magnet bearing shell monomer 11 one by one on the outer wall of the first inner rotor monomer 8 in axial order through the radial positioning buckle 9, and fix the two inner rotor permanent magnet bearing shell monomers 11 that are centrally symmetrical with the positioning pin 18;

[0034] Step 5: Position one end of the second inner rotor monomer 8 through the radial positioning ring 10 and connect the screw 5 to install it on the other end of the first inner rotor monomer 8, then install each inner rotor permanent magnet bearing shell monomer 11 one by one on the outer wall of the second inner rotor monomer 8 in axial order through the radial positioning buckle 9, and fix the two inner rotor permanent magnet bearing shell monomers 11 symmetrically in the center with the positioning pin 18;

[0035] In steps 4 and 5, if Figure 5 , Figure 6 As shown, in order to position the inner rotor permanent magnet bearing monomer 11 and prevent its radial movement and displacement, the positioning pin 18 is inserted into the positioning pin hole on the inner rotor permanent magnet bearing monomer 11 and the corresponding inner rotor monomer 8. In this embodiment, four positioning pins 18 are used to fix two inner rotor permanent magnet bearing monomers 11 that are symmetrical in center.

[0036] Step 6: Repeat step 5 according to the number of inner rotor monomers 8 determined by the design, and connect the inner rotor monomers 8 in sequence; finally, the inner rotor cover plate 16 is positioned by the radial positioning ring 10 and connected with the screws 5 to install it on the last inner rotor monomer 8, so that the inner rotor cover plate 16 and the inner rotor monomers 8 are integrally connected to form the inner rotor 4, and the inner rotor permanent magnet bearing monomers 11 form the inner rotor permanent magnet ring;

[0037] In step 6, the number of inner rotor monomers 8 in this embodiment corresponds to the number of outer rotor monomers 6, which is also three, and the corresponding inner rotor permanent magnet bearing shell monomers 11 are three groups, such as Figure 1 As shown, the inner rotor 4 is assembled from left to right from the end close to the driving end sleeve 1.

[0038] After the outer rotor 2 and the inner rotor 4 are assembled, the assembled inner rotor 4 is placed into the assembled outer rotor 2 through the centering device, the outer rotor cover plate 3 is connected to the active end sleeve 1, and the inner rotor cover plate 16 is connected to the driven end sleeve 17, and the assembly of the permanent magnet coupling is completed.

[0039] The centering device can adopt the application number 201610380133.5, the invention name of which is a centering device in a magnetic coupling and its installation method, or the application number 201811382202.1, the invention name of which is a centering device in a magnetic coupling with a conical positioning structure.

[0040] The outer rotor monomer 6, the outer rotor permanent magnet bearing monomer 7, the inner rotor monomer 8, and the inner rotor permanent magnet bearing monomer 11 corresponding to this embodiment form a working unit, and the assembled permanent magnet coupling consists of working unit a, working unit b, and working unit c. By changing the number of working units and / or the set working torque of each working unit, the set working torque of the permanent magnet coupling is changed, that is, according to the set working torque of each working unit, a combination is performed to obtain a permanent magnet coupling with the set working torque.

[0041] The utility model has a simple structure, in which the outer rotor 2 and the inner rotor 4 are connected by a split structure instead of an integral structure, thereby solving the problem of difficult installation of permanent magnet steel. At the same time, the permanent magnet coupling becomes a modular combined structure working unit, and the free combination of working units with different set working torques greatly increases the adjustment range of the set working torque of the permanent magnet coupling, reduces the workload of product design, greatly improves the versatility of the product, standardizes customer spare parts, and simplifies inventory management. Example 2

[0042] In Example 1, the centering device can realize radial installation under the condition of precise alignment of the drive shaft and the load shaft, and the outer rotor permanent magnet ring and the inner rotor permanent magnet ring will not be adsorbed together, which ensures the coaxiality of the outer rotor 2 and the inner rotor 4, is easy to install, reduces installation errors, and saves installation time. However, during the assembly process, it is difficult to ensure the coaxial assembly of the outer rotor 2 and the inner rotor 4, and an auxiliary device is also required for positioning and assembly. And because the assembled outer rotor 2 and the inner rotor 4 are rigidly connected together by the positioning connector, the permanent magnetic coupling needs to be removed or loosened when it is used. In this way, when the equipment vibrates violently or is overloaded during operation or the drive end component and the load end component cannot ensure the coaxiality of the drive shaft and the load shaft, the coaxiality of the outer rotor 2 and the inner rotor 4 cannot be ensured, resulting in serious consequences such as equipment damage. At the same time, the setting of components unrelated to power coupling makes the structure of the permanent magnetic coupling complex and heavy, and it is easy to produce instability and failure during high-speed rotation.

[0043] In order to ensure the coaxial positioning of the outer rotor 2 and the inner rotor 4 during installation and operation, the utility model has at least three outer rotor positioning grooves 13 on the end surface of the outer rotor monomer 6 away from the end of the outer rotor cover plate 3, and an outer rotor positioning bearing 14 is installed in each outer rotor positioning groove 13, and the outer ring of the outer rotor positioning bearing 14 is in contact with the outer surface of the inner rotor cover plate 16; at least three inner rotor positioning grooves are provided on the end surface of the inner rotor monomer 8 away from the end of the inner rotor cover plate 16, and an inner rotor positioning bearing is installed in each inner rotor positioning groove, and the outer ring of the inner rotor positioning bearing is in contact with the inner surface of the outer rotor cover plate 3.

[0044] The outer rotor locating bearing 14 of the utility model is installed in the outer rotor locating groove 13 through the locating shaft 15, and the locating shaft 15 is fixed to the outer rotor monomer 6 through the fixing screw 12; the inner rotor locating bearing is installed in the inner rotor locating groove through the locating shaft 15, and the locating shaft 15 is fixed to the inner rotor monomer 8 through the fixing screw 12.

[0045] The outer rotor locating bearing 14 and the inner rotor locating bearing of the utility model are deep groove ball bearings.

[0046] like Figure 2 , Figure 3 As shown, the outer rotor positioning grooves 13 and the inner rotor positioning grooves of this embodiment are both 4 and symmetrically arranged. In this way, the centering device of the present invention has a simple structure, ensures the coaxial positioning of the outer rotor 2 and the inner rotor 4, and is easy to install the permanent magnet coupling, which greatly saves installation time. At the same time, when the permanent magnet coupling is working, there is no need to remove its centering device, and the coaxiality of the outer rotor 2 and the inner rotor 4 is also ensured under extreme working conditions.

[0047] When assembling the outer rotor 2 in this embodiment, it includes the following steps:

[0048] Step 1: Install at least three outer rotor locating bearings 14 in the outer rotor locating groove 13 on one end surface of the first outer rotor monomer 6, and each outer rotor permanent magnet bearing shell monomer 7 is sequentially embedded on the inner wall of the first outer rotor monomer 6 in axial order, and fix two outer rotor permanent magnet bearing shell monomers 7 that are symmetrical in center with locating pins 18;

[0049] In step 1, if Figure 3 As shown, in this embodiment, there are four outer rotor positioning grooves 13 symmetrically arranged on the end tube surface of one end of the first outer rotor monomer 6 .

[0050] Step 2: Position one end of the second outer rotor monomer 6 through the radial positioning ring 10 and connect the screws 5 to install it on the other end of the first outer rotor monomer 6, then embed each outer rotor permanent magnet bearing shell monomer 7 one by one on the inner wall of the second outer rotor monomer 6 in axial order, and fix the two outer rotor permanent magnet bearing shell monomers 7 that are symmetrical in center with the positioning pins 18;

[0051] In steps 1 and 2, if Figure 7 , Figure 8 As shown, in order to position the outer rotor permanent magnet bearing monomer 7 and prevent its radial movement and displacement, the positioning pin 18 is inserted into the positioning pin hole on the outer rotor permanent magnet bearing monomer 7 and the corresponding outer rotor monomer 6. In this embodiment, four positioning pins 18 are used to fix two outer rotor permanent magnet bearing monomers 7 that are symmetrical in center.

[0052] Step 3: Repeat step 2 according to the number of outer rotor monomers determined by the design, and connect the outer rotor monomers in sequence; finally, the outer rotor cover plate is positioned on the last outer rotor monomer through the radial positioning ring and the connecting screws, so that the outer rotor cover plate and the outer rotor monomers are integrally connected to form an outer rotor, and the outer rotor permanent magnet bearing monomers form an outer rotor permanent magnet ring;

[0053] In step 3, the outer rotor monomers 6 of this embodiment are three, and the corresponding outer rotor permanent magnet bearing shell monomers 7 are three groups, such as Figure 1 As shown, the outer rotor 2 is assembled from right to left from the end close to the driven end sleeve 17.

[0054] When assembling the inner rotor 4 in this embodiment, it includes the following steps:

[0055] Step 4: Install at least three inner rotor locating bearings in the inner rotor locating grooves on one end surface of the first inner rotor monomer 8, and install each inner rotor permanent magnet bearing shell monomer 11 one by one on the outer wall of the first inner rotor monomer 8 in axial order through the radial locating buckle 9, and fix two inner rotor permanent magnet bearing shell monomers 11 that are symmetrical in center with the locating pin 18;

[0056] In step 4, if Figure 2As shown, in this embodiment, there are four inner rotor positioning grooves, which are symmetrically arranged on the end tube surface of one end of the first inner rotor monomer 8.

[0057] Step 5: Position one end of the second inner rotor monomer 8 through the radial positioning ring 10 and connect the screw 5 to install it on the other end of the first inner rotor monomer 8, then install each inner rotor permanent magnet bearing shell monomer 11 one by one on the outer wall of the second inner rotor monomer 8 in axial order through the radial positioning buckle 9, and fix the two inner rotor permanent magnet bearing shell monomers 11 symmetrically in the center with the positioning pin 18;

[0058] In steps 4 and 5, if Figure 5 , Figure 6 As shown, in order to position the inner rotor permanent magnet bearing monomer 11 and prevent its radial movement and displacement, the positioning pin 18 is inserted into the positioning pin hole on the inner rotor permanent magnet bearing monomer 11 and the corresponding inner rotor monomer 8. In this embodiment, four positioning pins 18 are used to fix two inner rotor permanent magnet bearing monomers 11 that are symmetrical in center.

[0059] Step 6: Repeat step 5 according to the number of inner rotor monomers 8 determined by the design, and connect the inner rotor monomers 8 in sequence; finally, the inner rotor cover plate 16 is positioned by the radial positioning ring 10 and connected with the screws 5 to install it on the last inner rotor monomer 8, so that the inner rotor cover plate 16 and the inner rotor monomers 8 are integrally connected to form the inner rotor 4, and the inner rotor permanent magnet bearing monomers 11 form the inner rotor permanent magnet ring;

[0060] In step 6, the number of inner rotor monomers 8 in this embodiment corresponds to the number of outer rotor monomers 6, which is also three, and the corresponding inner rotor permanent magnet bearing shell monomers 11 are three groups, such as Figure 1 As shown, the inner rotor 4 is assembled from left to right from the end close to the driving end sleeve 1.

[0061] After the outer rotor 2 and the inner rotor 4 are assembled, the assembled inner rotor 4 is placed into the assembled outer rotor 2 through the outer rotor positioning bearing 14 and the inner rotor positioning bearing; the outer rotor cover plate 3 is connected to the active end sleeve 1, and the inner rotor cover plate 16 is connected to the driven end sleeve 17, and the assembly of the permanent magnet coupling is completed.

[0062] The outer rotor monomer 6, the outer rotor permanent magnet bearing monomer 7, the inner rotor monomer 8, and the inner rotor permanent magnet bearing monomer 11 corresponding to this embodiment form a working unit, and the assembled permanent magnet coupling consists of working unit a, working unit b, and working unit c. By changing the number of working units and / or the set working torque of each working unit, the set working torque of the permanent magnet coupling is changed, that is, according to the set working torque of each working unit, a combination is performed to obtain a permanent magnet coupling with the set working torque.

[0063] The utility model is novel and unique. The inner rotor 2 and the outer rotor 4 are changed from an integral structure to a modular combined structure working unit. The structure is simple, which solves the installation difficulty of permanent magnetic steel. The working units with different set working torques can be freely combined. The adjustment range of the set working torque of the permanent magnetic coupling is greatly increased, which reduces the workload of product design, greatly improves the versatility of the product, standardizes customer spare parts, and simplifies inventory management. At the same time, the centering device of the present invention has a simple structure, which ensures the coaxial positioning of the outer rotor 2 and the inner rotor 4. The permanent magnetic coupling is easy to install, which greatly saves installation time. When the permanent magnetic coupling is working, there is no need to remove its centering device. Under extreme working conditions, the coaxiality of the outer rotor 2 and the inner rotor 4 is also guaranteed.

[0064] The rest is the same as in Example 1.

Claims

1. An outer rotor and an inner rotor of a permanent magnet coupling, characterized in that The outer rotor is formed by connecting an outer rotor cover plate and at least two outer rotor monomers, each outer rotor monomer is respectively provided with an outer rotor permanent magnet bearing monomer to form an outer rotor permanent magnet ring, and the inner rotor is formed by connecting an inner rotor cover plate and at least two inner rotor monomers, each inner rotor monomer is respectively provided with an inner rotor permanent magnet bearing monomer to form an inner rotor permanent magnet ring.

2. The outer rotor and inner rotor of the permanent magnet coupling according to claim 1 are characterized in that The outer rotor cover plate is connected to the adjacent outer rotor monomers and other adjacent outer rotor monomers as a whole through radial positioning rings and connecting screws, and the inner rotor cover plate is connected to the adjacent inner rotor monomers and other adjacent inner rotor monomers as a whole through radial positioning rings and connecting screws; each outer rotor permanent magnet bearing shell monomer is inlaid on the inner wall of the corresponding outer rotor monomer to form an outer rotor permanent magnet ring, and the inner rotor monomer and the inner rotor cover plate are provided with radial positioning buckles, and each inner rotor permanent magnet bearing shell monomer is installed on the outer wall of the corresponding inner rotor monomer through the radial positioning buckle to form an inner rotor permanent magnet ring.

3. The outer rotor and inner rotor of the permanent magnet coupling according to claim 2 are characterized in that 1 / 4 arc holes are respectively provided on the axially adjacent corners of the outer rotor permanent magnet bearing shell monomers, so that semicircular holes are formed adjacent to the two outer rotor permanent magnet bearing shell monomers, and positioning pin holes are formed with the corresponding semicircular holes on the outer rotor monomers; 1 / 4 arc holes are respectively provided on the axially adjacent corners of the inner rotor permanent magnet bearing shell monomers, so that semicircular holes are formed adjacent to the two inner rotor permanent magnet bearing shell monomers, and positioning pin holes are formed with the corresponding semicircular holes on the inner rotor monomers.

4. The outer rotor and inner rotor of the permanent magnet coupling according to claim 1, 2 or 3, characterized in that At least three outer rotor locating grooves are arranged on the end surface of the outer rotor monomer away from one end of the outer rotor cover plate, and an outer rotor locating bearing is installed in each outer rotor locating groove, and the outer ring of the outer rotor locating bearing contacts the outer surface of the inner rotor cover plate; at least three inner rotor locating grooves are arranged on the end surface of the inner rotor monomer away from one end of the inner rotor cover plate, and an inner rotor locating bearing is installed in each inner rotor locating groove, and the outer ring of the inner rotor locating bearing contacts the inner surface of the outer rotor cover plate.

5. The outer rotor and inner rotor of the permanent magnet coupling according to claim 4 are characterized in that The outer rotor locating bearing is installed in the outer rotor locating groove through the locating shaft, and the locating shaft is fixed to the outer rotor monomer through the fixing screw; the inner rotor locating bearing is installed in the inner rotor locating groove through the locating shaft, and the locating shaft is fixed to the inner rotor monomer through the fixing screw.

6. The outer rotor and inner rotor of the permanent magnet coupling according to claim 5 are characterized in that The outer rotor locating bearing and the inner rotor locating bearing are deep groove ball bearings.

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