A double-layer structure magnetic levitation bearing device

Abstract

A kind of double-layer structure magnetic suspension bearing device, bearing seat magnetic ring assembly is equipped with transverse magnetic ring slot, transverse magnetic ring slot one end is equipped with open mouth, main shaft is fixed with double-layer rotor magnetic ring assembly, double-layer rotor magnetic ring assembly is inserted into transverse magnetic ring slot by the open mouth of transverse magnetic ring slot, the inner side and the outer side of double-layer rotor magnetic ring assembly respectively form magnetic force structure with the inner wall of transverse magnetic ring slot;Realize the length of magnetic suspension bearing device is shortened, effectively improve the convenience of installation of relevant parts in magnetic suspension bearing device, meet installation demand.

Description

Technical Field

[0001] This application relates to the technical field of wind turbine generator main shafts, and in particular to a double-layer magnetic levitation bearing device. Background Technology

[0002] Large wind turbine generator sets typically use magnetic levitation main bearings for their main shaft systems. (Refer to...) Figure 1 The main shaft system typically consists of a main shaft 50 whose left end is connected to the wind turbine impeller to receive wind energy, and a main shaft 50 whose right end is connected to the generator. The wind energy captured by the impeller is transferred to the generator via the main shaft 50. The main shaft 50 is supported on a bearing housing 54 by a front bearing 51 and a rear bearing 55, which bear the radial load of the main shaft 50. The stator outer magnetic ring 52 is mounted on the bearing housing 54, and the rotor inner magnetic ring 53 forms a permanent magnet suspension bearing to bear the axial load. Wind turbines using magnetic suspension main bearings have low mechanical bearing preload on the main shaft 50, which reduces bearing friction, lowers the generator starting wind speed, and increases power generation. However, in the existing technology, due to the large axial load of the main shaft, the magnetic levitation bearing device needs to be very long to withstand the axial load of the main shaft. For some models of wind turbines, the excessively long magnetic levitation bearing device will cause difficulties in the installation of related components, or even make installation impossible. Utility Model Content

[0003] This utility model provides a double-layer structure magnetic levitation bearing device, which shortens the length of the magnetic levitation bearing device, effectively improves the convenience of installing related components in the magnetic levitation bearing device, and meets installation requirements.

[0004] To achieve the aforementioned objectives, this application adopts the following technical solution: A double-layer magnetic levitation bearing device, comprising The bearing housing magnetic ring assembly is provided with a transverse magnetic ring groove, one end of which is open. A double-layer rotor magnetic ring assembly is fixed on the main shaft. The double-layer rotor magnetic ring assembly is inserted into the transverse magnetic ring groove through the open end of the transverse magnetic ring groove. The inner and outer sides of the double-layer rotor magnetic ring assembly form a magnetic structure with the inner wall of the transverse magnetic ring groove, respectively.

[0005] In some alternative implementations, the transverse magnetic ring groove is formed by the stator magnetic ring cylinder and the bearing housing.

[0006] In some alternative implementations, the rotor magnetic ring cylinder is connected to the main shaft by bolts, and the double-layer rotor magnetic ring assembly is connected to the main shaft.

[0007] In some alternative implementations, a stator magnetic ring assembly is formed between the stator magnetic ring cylinder and the stator inner magnetic ring.

[0008] In some alternative implementations, the stator magnetic ring cylinder and the bearing housing are connected by bolts, thereby connecting the stator magnetic ring assembly and the bearing housing.

[0009] In some alternative implementations, a bearing housing and a stator outer magnetic ring are formed to create a bearing housing magnetic ring assembly.

[0010] In some alternative embodiments, the stator outer magnetic ring is formed by a plurality of magnetic steel blocks arranged in a ring shape, and the magnetic steel blocks are magnetized radially.

[0011] In some alternative implementations, the inner magnetic poles of the magnetic steel blocks in the same magnetic ring are aligned, and the outer magnetic poles are aligned.

[0012] In some alternative implementations, the magnetic poles of the inner and outer sides of the magnetic steel blocks in adjacent rotor outer magnetic rings or adjacent rotor inner magnetic rings are opposite, while the magnetic poles of the inner and outer sides of the corresponding rotor outer magnetic rings and rotor magnetic rings are the same.

[0013] In some alternative implementations, the magnetic poles of the inner and outer sides of the magnetic steel blocks in adjacent inner stator magnetic rings or adjacent outer stator magnetic rings are opposite.

[0014] The double-layer magnetic levitation bearing device provided in this application has the following beneficial effects: In the technical solution adopted in this application, a transverse magnetic ring groove is provided in the bearing housing magnetic ring assembly, and one end of the transverse magnetic ring groove is open. A double-layer rotor magnetic ring assembly is fixed on the main shaft. The double-layer rotor magnetic ring assembly is inserted into the transverse magnetic ring groove through the open end of the transverse magnetic ring groove. The inner and outer sides of the double-layer rotor magnetic ring assembly form a magnetic structure with the inner wall of the transverse magnetic ring groove, respectively. A front bearing and a rear bearing are sleeved on the main shaft to bear the radial load of the main shaft, and the main shaft can rotate radially. Under the action of the double-layer rotor magnetic ring assembly, the stator magnetic ring assembly, and the bearing housing magnetic ring assembly, the length of the magnetic levitation bearing device is shortened, which effectively improves the convenience of installation of related components in the magnetic levitation bearing device and meets the installation requirements. Attached Figure Description

[0015] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a structural schematic diagram of an existing magnetic levitation bearing device; Figure 2 This is a structural schematic diagram of a double-layer magnetic levitation bearing device according to this application; Figure 3 This is a schematic diagram of the rotor magnetic ring cylinder in a double-layer magnetic levitation bearing device of this application; Figure 4This is a schematic diagram of the rotor magnetic ring cylinder in a double-layer magnetic levitation bearing device according to this application from another perspective; Figure 5 This is a partial structural diagram of the rotor magnetic ring cylinder in a double-layer magnetic levitation bearing device of this application; Figure 6 This is a partial structural diagram of the double-layer rotor magnetic ring assembly in a double-layer magnetic levitation bearing device of this application; Figure 7 This is a schematic diagram of the stator magnetic ring cylinder in a double-layer magnetic levitation bearing device of this application; Figure 8 This is a structural schematic diagram of the stator magnetic ring cylinder in a double-layer magnetic levitation bearing device according to this application from another perspective; Figure 9 This is a partial structural diagram of the stator magnetic ring cylinder in a double-layer magnetic levitation bearing device of this application; Figure 10 This is a partial structural diagram of the stator magnetic ring assembly in a double-layer magnetic levitation bearing device of this application; Figure 11 This is a schematic diagram of the bearing housing in a double-layer magnetic levitation bearing device according to this application; Figure 12 This is a structural schematic diagram of the bearing housing in a double-layer magnetic levitation bearing device according to this application from another perspective; Figure 13 This is a partial structural diagram of the bearing housing in a double-layer magnetic levitation bearing device of this application; Figure 14 This is a partial structural diagram of the bearing housing magnetic ring assembly in a double-layer magnetic levitation bearing device of this application; Figure 15 This is a schematic diagram of the stator outer magnetic ring in a double-layer magnetic levitation bearing device according to this application; Figure 16 This is a schematic diagram of the magnetic steel block in a double-layer magnetic levitation bearing device of this application.

[0016] Figure label: 10. Spindle; 11. Front bearing; 12. Rear bearing; 20. Double-layer rotor magnetic ring assembly; 21. Rotor magnetic ring cylinder; 22. Annular groove; 23. Rotor outer magnetic ring; 24. Rotor inner magnetic ring; 30. Stator magnetic ring assembly; 31. Stator magnetic ring cylinder; 32. Stator inner magnetic ring; 40. Bearing housing magnetic ring assembly; 41. Bearing housing; 42. Stator outer magnetic ring; 43. Magnetic steel block; 44. Front bearing cover; 45. Rear bearing cover; 46. Shaft end cover; 47. Bolt; 50. Main shaft; 51. Front bearing; 52. Stator outer magnetic ring; 53. Rotor inner magnetic ring; 54. Bearing housing; 55. Rear bearing. Detailed Implementation

[0017] The specific embodiments of this application are described below with reference to the accompanying drawings and examples. Through the content described in this specification, those skilled in the art can clearly and completely understand the technical solution, the technical problem solved, and the resulting technical effects of this application. It is understood that the specific embodiments described herein are only for explaining this application and not for limiting it. Furthermore, for ease of description, only the parts related to this application are shown in the accompanying drawings.

[0018] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the contents described in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size should fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0019] The use of terms such as "first," "second," and "the" does not imply quantity limitation and may indicate singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, processes, methods, systems that include a series of steps or modules. The product or equipment is not limited to the listed steps or units, but may also include steps or units not listed, or other steps or units inherent to these processes, methods, products, or equipment. Terms such as “connection,” “linking,” and “coupled” used in this application are not limited to physical or mechanical connections, but may also include direct or indirect electrical connections.

[0020] It should also be noted that the longitudinal section corresponding to the embodiment of this application can be the section corresponding to the front view direction, the transverse section can be the section corresponding to the right view direction, and the horizontal section can be the section corresponding to the top view direction.

[0021] Furthermore, where there is no conflict, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] refer to Figure 2 , Figure 2 This is a structural schematic diagram of a double-layer magnetic levitation bearing device according to this application. Figure 2As shown, a double-layer magnetic levitation bearing device includes a main shaft 10, a double-layer rotor magnetic ring assembly 20 fixed to the main shaft 10, a stator magnetic ring assembly 30 sleeved on the main shaft 10, and a bearing seat magnetic ring assembly 40. A front bearing 11 and a rear bearing 12 are sleeved on the main shaft 10, and the main shaft 10 can rotate under the action of the front bearing 11 and the rear bearing 12. The radial load of the main shaft 10 is borne by the front bearing 11 and the rear bearing 12. The bearing seat magnetic ring assembly 40 is provided with a transverse magnetic ring groove, and one end of the transverse magnetic ring groove is open. The double-layer rotor magnetic ring assembly 20 is fixed on the main shaft 10. The double-layer rotor magnetic ring assembly 20 is inserted into the transverse magnetic ring groove through the open end of the transverse magnetic ring groove. The inner and outer sides of the double-layer rotor magnetic ring assembly 20 form a magnetic structure with the inner wall of the transverse magnetic ring groove, respectively. It should be noted that the transverse magnetic ring groove is formed by the stator magnetic ring cylinder 31 and the bearing seat 41.

[0023] Continue to refer to Figure 2 Please refer to them together. Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 , Figure 3 This is a schematic diagram of the rotor magnetic ring cylinder in a double-layer magnetic levitation bearing device according to this application. Figure 4 This is a schematic diagram of the rotor magnetic ring cylinder in a double-layer magnetic levitation bearing device according to this application, from another perspective. Figure 5 This is a partial structural diagram of the rotor magnetic ring cylinder in a double-layer magnetic levitation bearing device according to this application. Figure 6 This is a partial structural diagram of the double-layer rotor magnetic ring assembly in a double-layer magnetic levitation bearing device according to this application. Figure 7 This is a schematic diagram of the stator magnetic ring cylinder in a double-layer magnetic levitation bearing device according to this application. Figure 8 This is a schematic diagram of the stator magnetic ring cylinder in a double-layer magnetic levitation bearing device according to this application, from another perspective. Figure 9 This is a partial structural diagram of the stator magnetic ring cylinder in a double-layer magnetic levitation bearing device according to this application. Figure 10 This is a partial structural diagram of the stator magnetic ring assembly in a double-layer magnetic levitation bearing device according to this application. Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, the double-layer rotor magnetic ring assembly 20 includes a rotor magnetic ring cylinder 21. The inner and outer walls of the rotor magnetic ring cylinder 21 are provided with a plurality of annular grooves 22. The outer rotor magnetic ring 23 and the inner rotor magnetic ring 24 are installed inside the annular grooves 22. The outer rotor magnetic ring 23 is installed in the annular groove 22 provided on the outer wall of the rotor magnetic ring cylinder 21, and the inner rotor magnetic ring 24 is installed in the annular groove 22 provided on the inner wall of the rotor magnetic ring cylinder 21. The outer rotor magnetic ring 23, the inner rotor magnetic ring 24, and the rotor magnetic ring cylinder 21 form a double-layer rotor magnetic ring assembly 20. Furthermore, the double-layer rotor magnetic ring assembly 20 is connected to the main shaft 10 through the rotor magnetic ring cylinder 21 and under the action of bolts 47. The stator magnetic ring assembly 30 includes a stator magnetic ring cylinder 31. The outer wall of the stator magnetic ring cylinder 31 is provided with a plurality of annular grooves 22. Magnetic rings are installed inside the annular grooves 22. The stator magnetic ring cylinder 31 and the installed magnetic rings form the stator magnetic ring assembly 30. It should be noted that the magnetic rings installed inside the annular grooves 22 on the outer wall of the stator magnetic ring cylinder 31 are stator inner magnetic rings 32. Furthermore, the stator magnetic ring assembly 30 is connected to the bearing seat 41 by the stator magnetic ring cylinder 31 and the bearing seat 41 under the action of bolts 47.

[0024] Continue to refer to Figure 2 Please refer to them together. Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16 , Figure 11 This is a schematic diagram of the bearing housing in a double-layer magnetic levitation bearing device according to this application. Figure 12 This is a structural schematic diagram of the bearing housing in a double-layer magnetic levitation bearing device according to this application, from another perspective. Figure 13 This is a partial structural diagram of the bearing housing in a double-layer magnetic levitation bearing device according to this application. Figure 14 This is a partial structural diagram of the bearing housing magnetic ring assembly in a double-layer magnetic levitation bearing device according to this application. Figure 15 This is a schematic diagram of the stator outer magnetic ring in a double-layer magnetic levitation bearing device according to this application. Figure 16 This is a schematic diagram of the magnetic steel block in a double-layer magnetic levitation bearing device according to this application. Figure 2 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16As shown, the bearing housing magnetic ring assembly 40 includes a bearing housing 41. The inner wall of the bearing housing 41 has several annular grooves 22, and magnetic rings are installed inside the annular grooves 22. The bearing housing 41 and the installed magnetic rings form the bearing housing 41 magnetic ring assembly 40. It should be noted that the magnetic rings installed inside the annular grooves 22 on the inner wall of the bearing housing 41 are stator outer magnetic rings 42. Further, the stator outer magnetic ring 42 is formed by several magnetic steel blocks 43 arranged in a ring shape. The magnetic steel blocks 43 are magnetized radially. The inner side of the magnetic steel blocks 43 in the same magnetic ring... The magnetic poles are consistent, the outer magnetic poles are consistent, and the rotor outer magnetic ring 23, rotor inner magnetic ring 24, stator inner magnetic ring 32 and stator outer magnetic ring 42 have the same shape and structure, and the magnetic pole distribution of the magnetic steel blocks is also the same. It should be noted that the inner and outer magnetic poles of the magnetic steel blocks 43 in adjacent rotor outer magnetic rings 23 or adjacent rotor inner magnetic rings 24 are opposite, and the inner and outer magnetic poles of the corresponding rotor outer magnetic rings 23 and rotor magnetic rings 43 are the same; the inner and outer magnetic poles of the magnetic steel blocks 43 in adjacent stator inner magnetic rings 32 or adjacent stator outer magnetic rings 42 are opposite.

[0025] Here, a double-layer magnetic levitation bearing device includes a main shaft 10, a double-layer rotor magnetic ring assembly 20, a stator magnetic ring assembly 30, and a bearing housing magnetic ring assembly 40. The main shaft 10 is fitted with a front bearing 11 and a rear bearing 12. The double-layer rotor magnetic ring assembly 20 includes a rotor magnetic ring cylinder 21, with several annular grooves 22 on both its inner and outer walls. An outer rotor magnetic ring 23 and an inner rotor magnetic ring 24 are installed inside the annular grooves 22. The outer rotor magnetic ring 23 is installed within the annular groove 22 on the outer wall of the rotor magnetic ring cylinder 21, and the inner rotor magnetic ring 24 is installed within the annular groove 22 on the inner wall of the rotor magnetic ring cylinder 21. The stator magnetic ring assembly 30 includes a stator magnetic ring assembly 40. The ring cylinder 31 has several annular grooves 22 on its outer side wall, and the stator inner magnetic ring 32 is installed inside. The bearing seat magnetic ring assembly 40 includes a bearing seat 41, which has several annular grooves 22 on its inner side wall. The stator outer magnetic ring 42 is installed inside the annular grooves 22. By sleeved on the main shaft 10, the radial load of the main shaft 10 is borne, and the main shaft 10 can rotate radially. Under the action of the double-layer rotor magnetic ring assembly 20, the stator magnetic ring assembly 30 and the bearing seat magnetic ring assembly 40, the length of the magnetic levitation bearing device is shortened, which effectively improves the convenience of installation of related components in the magnetic levitation bearing device and meets the installation requirements.

[0026] For ease of understanding, this application is further described as follows: A double-layer magnetic levitation bearing device, through inner and outer two-layer annular magnetic structures, has a shorter length than the single-layer magnetic levitation bearing in the prior art, effectively improving the space utilization rate and meeting the design requirements for the installation space of other parts. It should be noted that the front bearing cover 44 is connected to the bearing seat 41 by bolts 47, the rear bearing cover 45 is connected to the stator magnetic ring cylinder 31 by bolts 47, and the shaft end cover 46 is connected to the main shaft 10 by bolts 47.

[0027] Although this application has been described and illustrated with reference to specific embodiments thereof, such description and illustration are not limiting of this application. It will be readily understood by those skilled in the art that various changes can be made and equivalent elements can be substituted within embodiments without departing from the true spirit and scope of this application as defined by the appended claims. Illustrations may not be drawn to scale. Differences may exist between the technical representation in this application and actual implementation due to variables in the manufacturing process, etc. Other embodiments of this application may exist that are not specifically described. The description and illustrations should be considered illustrative rather than restrictive. Modifications can be made to adapt particular circumstances, materials, composition, methods, or processes to the objectives, spirit, and scope of this application. All such modifications fall within the scope of the appended claims. While the methods disclosed herein have been described with reference to specific operations performed in a particular order, it should be understood that these operations can be combined, subdivided, or reordered to form equivalent methods without departing from the teachings of this application. Therefore, unless specifically indicated herein, the order and grouping of operations do not limit this application.

Claims

1. A double-layer magnetic levitation bearing device, characterized in that, include The bearing housing magnetic ring assembly (40) is provided with a transverse magnetic ring groove, one end of which is open. The main shaft (10) is fixed with a double-layer rotor magnetic ring assembly (20). The double-layer rotor magnetic ring assembly (20) is inserted into the transverse magnetic ring groove through the open end of the transverse magnetic ring groove. The inner and outer sides of the double-layer rotor magnetic ring assembly (20) form a magnetic structure with the inner wall of the transverse magnetic ring groove, respectively. The double-layer rotor magnetic ring assembly (20) includes a rotor magnetic ring cylinder (21). The inner and outer walls of the rotor magnetic ring cylinder (21) are provided with several annular grooves (22).

2. The double-layer magnetic levitation bearing device according to claim 1, characterized in that, The transverse magnetic ring groove is formed by the stator magnetic ring cylinder (31) and the bearing seat (41).

3. The double-layer magnetic levitation bearing device according to claim 2, characterized in that, The rotor magnetic ring cylinder (21) is connected to the main shaft (10) by bolts, and the double-layer rotor magnetic ring assembly (20) is connected to the main shaft (10).

4. The double-layer magnetic levitation bearing device according to claim 3, characterized in that, The stator magnetic ring cylinder (31) and the stator inner magnetic ring (32) are arranged to form a stator magnetic ring assembly (30).

5. The double-layer magnetic levitation bearing device according to claim 4, characterized in that, The stator magnetic ring cylinder (31) and the bearing seat (41) are connected by bolts, and the stator magnetic ring assembly (30) and the bearing seat (41) are connected.

6. The double-layer magnetic levitation bearing device according to claim 5, characterized in that, The bearing housing (41) and the stator outer magnetic ring (42) are positioned to form the bearing housing magnetic ring assembly (40).

7. The double-layer magnetic levitation bearing device according to claim 6, characterized in that, The stator outer magnetic ring (42) is formed by a number of magnetic steel blocks (43) arranged in a ring shape, and the magnetic steel blocks (43) are magnetized radially.

8. The double-layer magnetic levitation bearing device according to claim 7, characterized in that, The inner magnetic poles of the magnetic steel blocks (43) in the same magnetic ring are consistent, and the outer magnetic poles are consistent.

9. The double-layer magnetic levitation bearing device according to claim 8, characterized in that, The magnetic poles of the inner and outer sides of the magnetic steel blocks (43) in the adjacent outer magnetic ring (23) or the adjacent inner magnetic ring (24) of the rotor are opposite, and the magnetic poles of the inner and outer sides of the corresponding outer magnetic ring (23) and the magnetic steel blocks (43) in the inner magnetic ring (24) of the rotor are the same.

10. The double-layer magnetic levitation bearing device according to claim 9, characterized in that, The magnetic poles of the inner and outer sides of the magnetic steel blocks (43) in the adjacent inner stator magnetic ring (32) or the adjacent outer stator magnetic ring (42) are opposite.

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