Bearing assembly and motor

Abstract

The invention discloses a bearing assembly and a motor, the bearing assembly comprises an outer ring bearing and an inner ring bearing, the inner ring bearing is arranged in the outer ring bearing, the inner ring bearing and the outer ring bearing are both made of permanent magnets, the surface of the inner ring bearing and the surface of the outer ring bearing are both coated with silicon carbide coatings, and the silicon carbide coatings are made of silicon carbide. The magnetism of the inner ring bearing and the magnetism of the outer ring bearing repel each other. According to the bearing assembly, the surfaces of the outer ring bearing and the inner ring bearing made of the permanent magnets are coated with the silicon carbide coatings, so that the mechanical strength and the corrosion resistance of the bearing assembly can be improved, the overall performance of a motor using the bearing assembly is improved, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a bearing assembly and a motor including the bearing assembly. Background Art

[0002] In traditional rotating machinery, such as motors and centrifugal pumps, the rotation of the rotor depends on the support of two sets of bearings. The main function of the bearing is to support the rotating body, reduce friction and ensure rotation accuracy.

[0003] Although graphite bearings and silicon carbide bearings are widely used, in the process of implementing the invention, the inventors found that there are at least the following problems in the prior art: In motor applications, larger starting torque can have adverse effects on the motor and bearings, such as winding overheating, bearing damage, shaft damage, increased noise and vibration, difficulty in starting, reduced efficiency, and jitter during starting. These problems not only damage the motor performance and life, but may also lead to system failure. Summary of the invention

[0004] In order to effectively overcome the problems existing in the above-mentioned prior art, the main purpose of the present application is to provide a bearing assembly and a motor that can improve the overall performance and service life of the motor.

[0005] In order to achieve the above objectives, this application specifically adopts the following technical solutions: The present application provides a bearing assembly, the bearing assembly comprising: Outer ring bearing; An inner ring bearing, wherein the inner ring bearing is arranged inside the outer ring bearing, and both the inner ring bearing and the outer ring bearing are made of permanent magnets, the surfaces of the inner ring bearing and the outer ring bearing are coated with silicon carbide coating, and the inner ring bearing and the outer ring bearing magnetically repel each other.

[0006] In some embodiments, the inner ring bearing includes a bearing body and a fixing ring, the bearing body is made of the permanent magnet, and the surface of the bearing body is coated with a silicon carbide coating, and the fixing ring is disposed in the bearing body and connected to the bearing body.

[0007] In some embodiments, the inner ring bearing further includes a lock, which is engaged with the end of the bearing body to limit the fixing ring.

[0008] In some embodiments, the permanent magnet is a monopole permanent magnet or a multipole permanent magnet.

[0009] Accordingly, the present application also provides a motor, comprising: A housing assembly having a mounting cavity; A plurality of bearing assemblies, wherein the plurality of bearing assemblies are respectively arranged at two ends of the housing assembly; An axis core, the axis core is connected to each of the bearing assemblies and passes through the housing assembly; A stator, the stator being installed in the installation cavity and connected to the housing assembly; A rotor, the rotor being installed in the installation cavity and connected to the shaft core; Wherein, each of the bearing assemblies comprises an outer ring bearing and an inner ring bearing, the outer ring bearing is connected to the housing assembly, the inner ring bearing is arranged in the outer ring bearing and connected to the shaft core, the outer ring bearing and the inner ring bearing are both made of permanent magnets, and the surfaces of the outer ring bearing and the inner ring bearing are coated with silicon carbide coating, and the outer ring bearing and the inner ring bearing are magnetically repelling.

[0010] In some embodiments, the inner ring bearing includes a bearing body and a fixing ring, the bearing body is arranged in the outer ring bearing, and the bearing body is made of the permanent magnet, the surface of the bearing body is coated with the silicon carbide coating, the fixing ring is arranged in the bearing body, and the fixing ring is respectively connected to the bearing body and the shaft core.

[0011] In some embodiments, the bearing assembly further includes a lock, which is connected to an end of the bearing body and is used to limit the fixing ring.

[0012] In some embodiments, the shaft core is provided with a first limiting portion, and the motor further comprises a first clip, wherein the first clip is engaged with the shaft core to limit the inner ring bearing in the axial direction of the shaft core through the first clip and the first limiting portion.

[0013] In some embodiments, the bearing is provided with a second limiting portion, and the motor further comprises a second clip, wherein the second clip is engaged with the shaft core so as to limit the rotor in the axial direction of the shaft core through the second clip and the second limiting portion.

[0014] In some embodiments, the shell assembly includes a first shell and a second shell, and the second shell and the first shell are detachably connected to enclose the installation cavity.

[0015] Compared with the prior art, this application has at least the following beneficial effects: The bearing assembly provided by the present application includes an outer ring bearing and an inner ring bearing, wherein the inner ring bearing is arranged inside the outer ring bearing, and both the inner ring bearing and the outer ring bearing are made of permanent magnets, and the surfaces of the inner ring bearing and the outer ring bearing are coated with silicon carbide coatings, and the inner ring bearing and the outer ring bearing are magnetically repelling. Compared with the prior art, the present application can improve the mechanical strength and corrosion resistance of the bearing assembly by coating the surfaces of the outer ring bearing and the inner ring bearing made of permanent magnets with silicon carbide coatings, thereby improving the overall performance and service life of the motor using the bearing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a motor provided in an embodiment of the present application.

[0017] Figure 2 A side view of a motor provided in an embodiment of the present application.

[0018] Figure 3 for Figure 2 Cross-sectional view at AA in the middle.

[0019] Figure 4 for Figure 3 A partial enlarged view of .

[0020] Figure 5 A three-dimensional exploded view of a bearing assembly provided in an embodiment of the present application.

[0021] Figure 6 A cross-sectional view of an outer ring bearing is provided for an embodiment of the present application.

[0022] Figure 7 A cross-sectional view of a bearing body provided in an embodiment of the present application.

[0023] Figure 8 A cross-sectional view of the outer ring bearing from another perspective is provided for an embodiment of the present application.

[0024] Fig. 9 Another cross-sectional view of the bearing body is provided for the embodiment of the present application.

[0025] Fig.10 A matching diagram of the outer ring bearing and the bearing body provided in an embodiment of the present application.

[0026] Figure ID: 1. Shell assembly; 10. Bearing mounting seat; 11. First shell; 111. First connecting part; 12. Second shell; 121. Second connecting part; 13. Bolt; 2. Bearing assembly; 20a. Permanent magnet; 20b. Silicon carbide coating; 21. Outer ring bearing; 22. Inner ring bearing; 221. Bearing body; 221a. Snap-fit ​​position; 222. Fixing ring; 222a. Snap-fit ​​part; 223. Lock; 223a. Snap-fit ​​part; 3. Shaft core; 31. First limiting part; 32. Second limiting part; 4. Stator; 5. Rotor; 6. First snap; 7. Second snap. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] In the description of this application, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0030] In rotating machinery, such as motors and centrifugal pumps, bearings play a vital role. Bearings can be used to support rotating bodies to reduce friction and ensure rotation accuracy. However, existing technical solutions have the following problems and defects when facing specific engineering challenges: 1. Impact of high starting torque: The motor needs to overcome static friction and initial magnetic resistance torque when starting, which will produce a large starting torque. This torque will cause a series of adverse effects on the motor and bearings, including winding overheating, bearing damage, shaft damage, increased noise and vibration, difficulty in starting, reduced efficiency, and jitter at startup. These problems not only damage the performance and life of the motor, but may also cause failure of the entire system.

[0031] 2. Limitation of material performance: Although traditional bearing materials such as graphite and silicon carbide are excellent in wear resistance, corrosion resistance and high temperature resistance, they have limitations in assisting rotation, reducing rotational inertia and improving motor efficiency. These materials cannot effectively reduce energy loss, thus limiting the potential of motors in terms of high efficiency and energy saving and environmental protection.

[0032] In order to effectively overcome the problems existing in existing rotating machinery, the inventors of this application have proposed an innovative permanent magnet bearing technology, which achieves the suspension of the rotor by combining a silicon carbide coating on the permanent magnet, significantly reduces the impact of starting torque, and optimizes the dynamic performance. This silicon carbide coating not only enhances the wear and corrosion resistance of the bearing, but also enables it to perform better in high temperature and high load environments. Therefore, the development of this new type of permanent magnet bearing with silicon carbide coated on the surface is expected to become an important direction for future research, providing a more reliable and efficient solution for rotating machinery, thereby improving the overall performance and service life of the motor.

[0033] Reference Figures 1 to 3 As shown, an embodiment of the present application discloses a motor, which includes a housing assembly 1, a plurality of bearing assemblies 2, a shaft core 3, a stator 4 and a rotor 5. The housing assembly 1 is provided with a mounting cavity, and the plurality of bearing assemblies 2 are respectively arranged at both ends of the housing assembly 1. The shaft core 3 is connected to each bearing assembly 2 and passes through the housing assembly 1, and the shaft core 3 can be used to connect with an external load. The stator 4 is installed in the mounting cavity and connected to the housing assembly 1, and the rotor 5 is installed in the mounting cavity and connected to the shaft core 3, and the position of the rotor 5 is set corresponding to the position of the stator 4. When the stator 4 is energized, the stator 4 will generate a magnetic field, and the magnetic field generated by the rotor 5 will interact with the magnetic field generated by the stator 4, so that the rotor 5 rotates, so that the shaft core 3 can be driven to rotate through the rotor 5, and then the external load is driven to operate through the shaft core 3.

[0034] Continue to refer to Figure 1As shown, the housing assembly 1 includes a first housing 11, a second housing 12 and bolts 13, and the first housing 11 and the second housing 12 are detachably connected to enclose a mounting cavity. Exemplarily, the first housing 11 includes a plurality of first connecting portions 111, and the plurality of first connecting portions 111 are distributed at intervals along the circumference of the first housing 11, and the second housing 12 includes a plurality of second connecting portions 121, and the plurality of second connecting portions 121 are distributed at intervals along the circumference of the second housing 12, and the positions and numbers of the plurality of second connecting portions 121 are arranged corresponding to the positions and numbers of the plurality of first connecting portions 111. A plurality of bolts 13 are provided, and each bolt 13 passes through each first connecting portion 111 and each second connecting portion 121, respectively, so that the first housing 11 and the second housing 12 are connected by the bolts 13, that is, the detachable connection of the first housing 11 and the second housing 12 is realized. Of course, the first housing 11 and the second housing 12 can also be detachably connected in other ways.

[0035] In this embodiment, the first housing 11 and the second housing 12 are respectively provided with a bearing mounting seat 10, and two bearing assemblies 2 are provided, and the two bearing assemblies 2 are respectively installed on the bearing mounting seats 10 of the first housing 11 and the second housing 12. One end of the shaft core 3 is respectively connected to the two bearing assemblies 2, and the rotor 5 is connected to the shaft core 3 and located between the two bearing assemblies 2, and the other end of the shaft core 3 passes through the first housing 11.

[0036] Also refer to Figure 3 and Figure 4 As shown, each bearing assembly 2 includes an outer ring bearing 21 and an inner ring bearing 22, and the outer ring bearing 21 is connected to the housing assembly 1. For example, the outer ring bearing 21 can be fixed in the bearing mounting seat 10 by means of a positioning bead. The inner ring bearing 22 is arranged in the outer ring bearing 21 and connected to the shaft core 3, and the inner ring bearing 22 can rotate relative to the outer ring bearing 21, so that the inner ring bearing 22 can be driven to rotate by the shaft core 3. Among them, the outer ring bearing 21 and the inner ring bearing 22 are both annular components made of permanent magnets, the inner ring bearing 22 is sleeved on the shaft core 3 and fixedly connected to the shaft core 3, and the surfaces of the outer ring bearing 21 and the inner ring bearing 22 are coated with a silicon carbide coating, and the outer ring bearing 21 and the inner ring bearing 22 are magnetically repelled from each other, so that there is a certain gap between the outer ring bearing 21 and the inner ring bearing 22, so as to realize the magnetic suspension structure of the outer ring bearing 21 and the inner ring bearing 22.

[0037] The present application adopts permanent magnets to make the outer ring bearing and the inner ring bearing, and the surface of the outer ring bearing 21 and the inner ring bearing 22 made of permanent magnets is coated with silicon carbide coating, thereby solving many problems existing in traditional bearings under high starting torque, thereby improving the performance and life of the motor, and combining the contactless suspension advantage of permanent magnet bearings and the wear resistance and corrosion resistance of silicon carbide coatings to provide a reliable, efficient and stable operation solution for rotating machinery in harsh environments; at the same time, the inner ring bearing 22 in this embodiment can rotate without contact with the outer ring bearing 21, reducing friction and wear caused by physical contact, and reducing energy loss.

[0038] Reference Figure 5 As shown, the inner ring bearing 22 includes a bearing body 221, a fixing ring 222 and a locking buckle 223, and the bearing body 221 is arranged on the inner side of the outer ring bearing 21. The fixing ring 222 is arranged on the inner side of the bearing body 221, and the fixing ring 222 is connected to the bearing body 221 and the shaft core 3 respectively, so that the bearing body 221 can be fixed on the shaft core 3 through the fixing ring 222. The locking buckle 223 is connected to the end of the bearing body 221, and is used to limit the fixing ring 222 in the axial direction of the shaft core 3. The present embodiment can effectively ensure the stability of the connection between the inner ring bearing 22 and the shaft core 3 by setting the fixing ring 222, and can effectively prevent the shaft core 3 from directly contacting and rubbing with the bearing body 221 to damage the bearing body 221. By setting the locking buckle 223, the fixing ring 222 can be limited in the axial direction of the shaft core 3 to effectively ensure the safety and stability of the inner ring bearing 22 during rotation. At the same time, the locking buckle 223 also separates the first limiting portion of the bearing body 221 and the shaft core 3, further preventing the shaft core 3 from directly contacting and rubbing with the bearing body 221 to damage the bearing body 221.

[0039] In some embodiments, a snap-fit ​​position 221a is provided at the end of the bearing body 221, and a snap-fit ​​groove (not shown in the figure) is provided on the inner side of the bearing body 221. The lock buckle 223 includes a snap-fit ​​portion 223a, which is arranged in cooperation with the snap-fit ​​position 221a, so that the lock buckle 223 can be snap-fitted to the bearing body 221 through the snap-fit ​​portion 223a and the snap-fit ​​position 221a. The fixing ring 222 includes a snap-fit ​​portion 222a, which is arranged in cooperation with the snap-fit ​​groove of the bearing body 221, so that the fixing ring 222 can be snap-fitted to the inner side of the bearing body 221 through the snap-fit ​​portion 222a.

[0040] Continue to refer to Figure 3As shown, the shaft core 3 is provided with a first limiting portion 31 and a second limiting portion 32, and the motor further includes a first buckle 6 and a second buckle 7. The first buckle 6 is engaged with the bearing 3 and cooperates with the first limiting portion 31, and is used to limit the inner ring bearing 22, effectively preventing the inner ring bearing 22 from moving along the length extension direction of the shaft core 3. The second buckle 7 is engaged with the shaft core 3 and cooperates with the second limiting portion 32, and is used to limit the rotor 5, effectively preventing the rotor 5 from moving along the length extension direction of the shaft core 3. In this embodiment, the stability of the connection between the inner ring bearing 22 and the shaft core 3 can be improved by setting the first buckle 6 and the first limiting portion 31, and the stability of the connection between the rotor 5 and the shaft core can be improved by setting the second buckle 7 and the second limiting portion 32.

[0041] In some embodiments, the fixing ring 222 and the locking buckle 223 may be made of stainless steel or other materials, and the first buckle 6 and the second buckle 7 may be C buckles.

[0042] Reference Figures 6 to 10 As shown, the outer ring bearing 21 is made of permanent magnets 20a, and the entire outer surface of the outer ring bearing 21 is coated with silicon carbide coating 20b, and the bearing body 221 is made of permanent magnets 20a, and the entire outer surface of the outer ring bearing 21 is coated with silicon carbide coating 20b.

[0043] In this embodiment, the permanent magnet may be sintered ferrite or other materials with equivalent physical properties, and the permanent magnet may be a monopole permanent magnet or a multi-pole permanent magnet to meet different starting torque requirements and realize the magnetic suspension of the bearing assembly 2. In the magnetic suspension bearing, for a monopole permanent magnet, when the permanent magnet used to make the outer ring bearing 21 is an N pole, then the permanent magnet used to make the bearing body 221 is also an N pole, or, when the permanent magnet used to make the outer ring bearing 21 is an S pole, then the permanent magnet used to make the bearing body 221 is also an S pole, so as to generate repulsion, thereby realizing magnetic suspension. For a multi-pole permanent magnet, when the inner side of the outer ring bearing is an N pole, then the side of the inner ring bearing facing the outer ring bearing is also an N pole, and when the inner side of the outer ring bearing is an S pole, then the side of the inner ring bearing facing the outer ring bearing is also an S pole, so as to generate repulsion, thereby realizing magnetic suspension.

[0044] In this embodiment, sintered ferrite is used to make the outer ring bearing 21 and the bearing body 221, so that the bearing assembly 2 has the following properties: a. High density and magnetic properties, because the sintered ferrite is solidified by high-temperature sintering, so it has higher density and magnetic properties; b. Good mechanical strength, the sintered ferrite is hard and has good mechanical strength; c. Corrosion resistance, sintered ferrite has good corrosion resistance and can be used in a variety of environments.

[0045] In addition, this embodiment applies a coating of silicon carbide or other materials with equivalent properties on the surface of the outer ring bearing 21 and the bearing body 221, so that the bearing assembly 2 has the following properties: a. Wear resistance, because the silicon carbide coating 20b can improve the wear resistance of the magnet, which plays an important role in the starting torque and coating characteristics; b. High temperature resistance, because the silicon carbide material has high thermal conductivity and can maintain stable performance in a high temperature environment; c. Corrosion resistance, because the silicon carbide coating 20b provides an additional protective layer, making the performance of the magnet more stable in a corrosive environment; d. A matching thermal expansion system, because the thermal expansion coefficient of the silicon carbide material is similar to that of the ferrite material, which helps to reduce thermal stress and improve the adhesion of the coating.

[0046] It should be noted that the silicon carbide coating 20b can be selected with different thicknesses to achieve the best balance between the starting torque and the coating characteristics. The thickness of the coating will affect the performance of the magnet, so a trade-off needs to be made between the starting torque and the coating characteristics during design to optimize the magnet performance. By optimizing the thickness and characteristics of the coating, the performance and durability of the sintered ferrite magnet in various working environments can be significantly improved, especially under high temperature and high load conditions.

[0047] It can be seen from the above that the present application has at least the following technical effects: A. Reduce the impact of starting torque: Magnetic levitation technology can significantly reduce the adverse effects of starting torque on motors and bearings, and reduce problems such as winding overheating and bearing damage.

[0048] B. Improve motor performance and life: Reduce friction and wear, reduce noise and vibration, and improve starting efficiency, thereby improving the overall performance and service life of the motor.

[0049] C. Enhanced wear resistance and corrosion resistance: Silicon carbide coating improves the wear resistance and corrosion resistance of the bearing, enabling it to operate stably in high temperature, high load and corrosive environments.

[0050] D. Optimize dynamic performance: Non-contact suspension support reduces energy loss, improves motor efficiency and energy-saving and environmental protection potential.

[0051] E. Improved reliability: By reducing physical contact and optimizing material properties, the reliability of rotating machinery is improved and the risk of system failure is reduced.

[0052] F. Adapt to harsh environments: The selection of coatings and materials enables the bearings to maintain stable performance in high temperature, high load and corrosive environments.

[0053] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A bearing assembly, characterized in that: include: Outer ring bearing; An inner ring bearing, wherein the inner ring bearing is arranged inside the outer ring bearing, and both the inner ring bearing and the outer ring bearing are made of permanent magnets, and the surfaces of the inner ring bearing and the outer ring bearing are coated with silicon carbide coatings, and the inner ring bearing and the outer ring bearing magnetically repel each other.

2. The bearing assembly according to claim 1, characterized in that: The inner ring bearing comprises a bearing body and a fixing ring. The bearing body is made of the permanent magnet, and the surface of the bearing body is coated with a silicon carbide coating. The fixing ring is arranged in the bearing body and connected to the bearing body.

3. The bearing assembly according to claim 2, characterized in that: The inner ring bearing also includes a lock buckle, which is engaged with the end of the bearing body and is used to limit the fixing ring.

4. The bearing assembly according to any one of claims 1 to 3, characterized in that: The permanent magnet is a monopole permanent magnet or a multipole permanent magnet.

5. A motor, characterized in that: include: A housing assembly having a mounting cavity; A plurality of bearing assemblies, wherein the plurality of bearing assemblies are respectively arranged at two ends of the housing assembly; An axis core, the axis core is connected to each of the bearing assemblies and passes through the housing assembly; A stator, the stator being installed in the installation cavity and connected to the housing assembly; A rotor, the rotor being installed in the installation cavity and connected to the shaft core; Wherein, each of the bearing assemblies comprises an outer ring bearing and an inner ring bearing, the outer ring bearing is connected to the housing assembly, the inner ring bearing is arranged in the outer ring bearing and connected to the shaft core, the outer ring bearing and the inner ring bearing are both made of permanent magnets, and the surfaces of the outer ring bearing and the inner ring bearing are coated with silicon carbide coating, and the outer ring bearing and the inner ring bearing are magnetically repelling.

6. The motor according to claim 5, characterized in that The inner ring bearing includes a bearing body and a fixing ring. The bearing body is arranged in the outer ring bearing, and the bearing body is made of the permanent magnet. The surface of the bearing body is coated with the silicon carbide coating. The fixing ring is arranged in the bearing body, and the fixing ring is respectively connected to the bearing body and the shaft core.

7. The motor according to claim 6, characterized in that The bearing assembly also includes a lock, which is connected to the end of the bearing body and is used to limit the fixing ring.

8. The motor according to claim 5, characterized in that The shaft core is provided with a first limiting portion, and the motor further comprises a first buckle, which is engaged with the shaft core to limit the inner ring bearing in the axial direction of the shaft core through the first buckle and the first limiting portion.

9. The motor according to claim 5, characterized in that The bearing is provided with a second limiting portion, and the motor further comprises a second clip, which is engaged with the shaft core so as to limit the rotor in the axial direction of the shaft core through the second clip and the second limiting portion.

10. The motor according to any one of claims 5 to 9, characterized in that: The housing assembly comprises a first housing and a second housing, wherein the second housing and the first housing are detachably connected to form the installation cavity.

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