Magnetic suspension radial hybrid bearing, magnetic suspension motor and magnetic suspension rotating machine
By constructing a heat dissipation duct inside the magnetic radial ring and optimizing the heat dissipation structure, the problem of insufficient heat dissipation of the magnetic levitation radial hybrid bearing is solved, efficient air cooling is achieved, and the bearing performance and rotor speed are improved.
Patent Information
- Application Number
- CN202423211616.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-25
AI Technical Summary
The air-cooling effect of existing magnetic levitation radial hybrid bearings is low, and conventional heat dissipation methods have an adverse effect on bearing performance, especially in the lack of effective heat dissipation in industrial applications.
A plurality of first heat dissipation ducts are constructed in the magnetic radial ring. The cooling airflow passes through these ducts to efficiently cool the magnetic radial ring and the bearing core. The heat dissipation structure is further optimized through the magnetic end ring and the circumferential convex ring, thereby reducing the number of components and lowering the manufacturing cost.
It improves the heat dissipation effect of the bearing, prevents the demagnetization of the permanent magnet, reduces the temperature rise of the bearing, improves the bearing performance and rotor speed, and simplifies the assembly process.
Smart Images
Figure CN223469583U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of magnetic suspension bearing design, concretely relates to a kind of magnetic suspension radial hybrid bearing, magnetic suspension motor and magnetic suspension rotating machinery. BACKGROUND
[0002] Magnetic suspension motor is a kind of special motor with non-contact operation of stator and rotor, which is widely used in refrigeration field and industrial field, such as magnetic suspension air compressor, magnetic suspension blower, magnetic suspension centrifugal refrigeration compressor and other rotating machinery. As the core functional component of magnetic suspension motor, magnetic suspension bearing can be divided into active type, passive type and hybrid type, among which active type and hybrid type use electric current to generate magnetic field to provide suspension force for rotor. However, in the process of using magnetic bearing, the heating of magnetic bearing cannot be ignored. The magnetic suspension bearing applied to centrifugal refrigeration compressor can be cooled by refrigerant, but the magnetic suspension air compressor bearing and magnetic suspension blower bearing applied to industrial field mostly lack additional cooling, which easily causes high temperature rise of magnetic bearing, and further leads to problems such as accelerated aging of components, increased loss of magnetic bearing and demagnetization of permanent magnet. In order to overcome the aforementioned deficiencies in the prior art, one way in the related art is to set a cooling air duct on the bearing core to achieve heat dissipation. This way requires a relatively high setting position of the cooling air duct due to the relatively limited physical area of the bearing core, otherwise it is easy to cause saturation of magnetic flux in the core, affecting the magnetic circuit of the bearing. Another way is to reserve a flow-through space in the winding slot, which reduces the slot fill rate and reduces the working performance of the bearing. In addition, due to the limitation of core structure and bearing performance, the number of cooling air ducts is relatively limited in the aforementioned two conventional ways, and the air cooling effect is relatively low. SUMMARY
[0003] Therefore, the utility model provides a kind of magnetic suspension radial hybrid bearing, magnetic suspension motor and magnetic suspension rotating machinery, which can solve the technical problems that the heat dissipation effect of the air cooling heat dissipation structure of the magnetic suspension radial hybrid bearing in the prior art is relatively low, and it will adversely affect the performance of the bearing.
[0004] In order to solve the above problems, the utility model provides a kind of magnetic suspension radial hybrid bearing, which comprises a bearing seat and a radial magnetic floating assembly. The bearing seat has a bearing chamber, and the radial magnetic floating assembly is assembled in the bearing chamber. The radial magnetic floating assembly comprises a core assembly, a permanent magnet and a magnetic radial ring. The core assembly comprises a bearing core. The magnetic radial ring is fixedly connected to the radial outer wall of the bearing core to form a magnetic circuit of the permanent magnet. The magnetic radial ring is also fixedly connected with the bearing seat. A plurality of first cooling air ducts are formed in the magnetic radial ring. Cooling air flow can flow into one side port and flow out of the other side port of the first cooling air duct.
[0005] In some embodiments, a plurality of second heat dissipation air ducts are configured in the bearing seat, each of the second heat dissipation air ducts is arranged one-to-one corresponding to at least part of the first heat dissipation air ducts, and a side port of each of the second heat dissipation air ducts is connected in communication with a side port of at least part of the first heat dissipation air ducts.
[0006] In some embodiments, each of the first heat dissipation air ducts and the second heat dissipation air ducts is parallel to the central axis of the bearing core; and / or each of the first heat dissipation air ducts is uniformly spaced around the central axis of the bearing core.
[0007] In some embodiments, the magnetically conductive radial ring is formed with a plurality of accommodation grooves around the magnetically conductive radial ring on an end face of a side of the bottom wall of the bearing chamber, the permanent magnets are a plurality of, each of the permanent magnets is assembled one-to-one corresponding in each of the accommodation grooves, and each of the first heat dissipation air ducts is on a radial outer side of each of the accommodation grooves.
[0008] In some embodiments, the radial magnetic suspension assembly further comprises a magnetically conductive end ring connected to the end face of the side of the bottom wall of the bearing chamber on the magnetically conductive radial ring to block the slot opening of each of the accommodation grooves.
[0009] In some embodiments, the magnetically conductive radial ring further has an axial protruding ring extending towards the bottom wall of the bearing chamber on the end face of the side of the bottom wall of the bearing chamber, the magnetically conductive end ring is assembled in the axial protruding ring, and the magnetically conductive end ring and the inner ring wall of the axial protruding ring are gap-fitted.
[0010] In some embodiments, the core assembly further comprises a control winding wound around each tooth of the bearing core, the inner ring wall of the magnetically conductive radial ring has a circumferential protruding ring extending radially inwardly therefrom, each of the accommodation grooves is on an end face of a side of the bottom wall of the bearing chamber towards the circumferential protruding ring, the bearing core abuts on an end face of a side of the bottom wall of the bearing chamber away from the circumferential protruding ring, an end head of the control winding protruding from the end face of the side of the bottom wall of the bearing chamber is a first end head, an axial thickness of the circumferential protruding ring is not less than an axial height of the first end head, and the first end head is in the inner ring through hole of the circumferential protruding ring.
[0011] In some embodiments, the bearing seat has a positioning through hole penetrating in and out of the bearing chamber, the outer ring wall of the magnetically conductive radial ring has a threaded hole corresponding in position to the positioning through hole, the threaded hole extends along the radial direction of the magnetically conductive radial ring, and a threaded part is threadedly connected via the positioning through hole and the threaded hole.
[0012] The utility model also provides a magnetic suspension motor which comprises the above-mentioned magnetic suspension radial hybrid bearing.
[0013] The utility model also provides a kind of magnetic suspension rotating machinery, including above-mentioned magnetic suspension motor.
[0014] The magnetic suspension radial hybrid bearing, the magnetic suspension motor and the magnetic suspension rotating machinery provided by the utility model have the following beneficial effects:
[0015] The first heat dissipation air duct is arranged on the magnetically conductive radial ring, and the cooling airflow flowing through the first heat dissipation air duct can form efficient air cooling on the magnetically conductive radial ring and the bearing core connected to the radial inner side of the magnetically conductive radial ring, thereby effectively preventing the bearing core from being overheated and preventing the high-temperature demagnetization of the permanent magnet caused by the overheating of the bearing core; in the utility model, the first heat dissipation air duct is arranged on the magnetically conductive radial ring instead of being arranged on the bearing core, so that the arrangement position and the number and flow area of the first heat dissipation air duct are no longer limited by the structure of the bearing core, the winding slot fullness of the control winding can be higher, and the working performance of the bearing can be improved while ensuring efficient air cooling of the bearing.
[0016] The magnetically conductive radial ring is located on the radial outer side of the bearing core and has a large inner diameter and a large outer diameter, so it has a large magnetic conduction area; under this premise, more first heat dissipation air ducts can be arranged, thereby ensuring the flow and cooling effect of the cooling airflow.
[0017] The corresponding accommodating grooves are arranged on the side end surface of the magnetically conductive radial ring, and the corresponding permanent magnets are accommodated and assembled in the accommodating grooves, so the magnetic steel fixing frame arranged separately in the prior art is not needed, the number of components is reduced, the manufacturing cost is reduced, and the axial thickness of the bearing is also significantly reduced, which is beneficial to reducing the shaft length of the rotating shaft and thereby improving the maximum rotating speed of the rotor; more importantly, the permanent magnets are directly assembled in the accommodating grooves arranged on the magnetically conductive radial ring in the present application, and since the first heat dissipation air duct is formed in the magnetically conductive radial ring, the permanent magnets can be subjected to efficient air cooling by the first heat dissipation air duct, thereby further reducing the probability of demagnetization of the permanent magnets caused by high temperature.
[0018] The magnetically conductive end ring connected to the magnetically conductive radial ring is arranged on one side of the slot opening of the accommodating groove, which can block and position the permanent magnets in the accommodating grooves, thereby simplifying the assembly of the permanent magnets (at this time, the permanent magnets only need to be placed in the corresponding accommodating grooves to be positioned in the circumferential direction, and the axial positioning of the permanent magnets can be realized by the magnetically conductive end ring), and on the other hand, the magnetically conductive end ring enables the bias magnetic field to flow in the radial direction, so that the air gap between the radial inner side of the magnetically conductive end ring and the rotating shaft is as small as possible, thereby ensuring the bias effect.
[0019] The circumferential convex ring serves as an axial positioning structure of the bearing core, ensures that the bearing core can be assembled in place, ensures assembly precision, and forms a receiving space for the first end of the control winding; since the first heat dissipation air duct and the circumferential convex ring are both on the magnetic conducting radial ring, the circumferential convex ring can effectively cool the first end and the permanent magnets, and the temperature rise of the bearing is further reduced.
[0020] The third heat dissipation air duct in the circumferential convex ring can further improve the cooling capacity of the circumferential convex ring for the first end and the permanent magnets. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced. The drawings in the following description are only exemplary, and for those skilled in the art, other embodiments can be derived from the provided drawings without creative labor.
[0022] Figure 1 is a schematic diagram of the internal structure of the magnetic suspension radial hybrid bearing of the embodiment of the present application;
[0023] Figure 2 is Figure 1 a left view of
[0024] Figure 3 is Figure 1 a right view of
[0025] Figure 4 is Figure 1 an external schematic diagram of the bearing seat in
[0026] Figure 5 is Figure 4 a right view of
[0027] Figure 6 is Figure 1 an axial cross-sectional schematic diagram of the magnetic conducting radial ring in
[0028] Figure 7 is Figure 6 a right view of
[0029] Figure 8 is Figure 1 an axial view of the magnetic conducting end ring in
[0030] Figure 9 is Figure 1 a structural schematic diagram of the permanent magnet in
[0031] The reference signs are:
[0032] 1, bearing seat; 10, bearing chamber; 11, second heat dissipation air duct; 12, positioning through hole; 21, iron core assembly; 211, bearing iron core; 212, control winding; 22, permanent magnet; 23, magnetic conducting radial ring; 231, first heat dissipation air duct; 232, accommodating groove; 233, circumferential convex ring; 24, magnetic conducting end ring. DETAILED DESCRIPTION
[0033] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0034] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.
[0035] For the convenience of description, spatial relative terms such as "on", "above", "upper surface", "upper" and the like can be used to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawings is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the example term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.
[0036] In addition, it needs to be explained that the use of "first", "second" and the like to limit the parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning if there is no further declaration, so it cannot be understood as a limitation on the protection scope of the utility model.
[0037] Referring to Figure 1 and Figure 9 As shown in the drawings, according to the embodiment of the utility model, a magnetic suspension radial bearing is provided, which comprises a bearing seat 1 (also can be called a bearing shell), a radial magnetic suspension assembly (not marked in the drawing), the bearing seat 1 has a bearing chamber 10, the radial magnetic suspension assembly is assembled in the bearing chamber 10, taking a specific use state as a reference, the bearing chamber 10 is open along the axial direction of the rotating shaft and towards one side, and the opposite side of the opening is the bottom wall of the bearing chamber 10, the radial magnetic suspension assembly is assembled in the bearing chamber 10 through the opening, specifically, the radial magnetic suspension assembly comprises an iron core assembly 21, a permanent magnet 22 and a magnetic conducting radial ring 23, the iron core assembly 21 comprises a bearing iron core 211 and a control winding 212 (that is, a power coil) wound on each tooth of the bearing iron core 211, it can be understood that the aforementioned control winding 212 is used to form a control magnetic field, the magnetic conducting radial ring 23 is fixedly connected to the radial outer wall of the bearing iron core 211 and is used to form the magnetic circuit of the permanent magnet 22, and the main purpose of the magnetic conducting radial ring 23 is to form a flow path for the bias magnetic field formed by the permanent magnet 22, the magnetic conducting radial ring 23 is also fixedly connected with the bearing seat 1, specifically, the magnetic conducting radial ring 23 is assembled in the bearing chamber 10, a plurality of first heat dissipation air ducts 231 are formed in the magnetic conducting radial ring 23, cooling air flow can flow into one side port and flow out from the other side port of the first heat dissipation air duct 231, in the specific application process, the cooling air flow flows into the one side port of the first heat dissipation air duct 231 and flows out from the other side port of the first heat dissipation air duct 231 after heat exchange with the magnetic conducting radial ring 23, and it can be understood that the heat in the bearing iron core 211 is conducted to the magnetic conducting radial ring 23 for dissipation, it needs to be explained that which side of the aforementioned first heat dissipation air duct 231 is the inflow side of the cooling air flow is determined by the driving component of the cooling air flow.
[0038] In the technical scheme, the first heat dissipation air duct 231 is arranged in the magnetic conducting radial ring 23, and the cooling air flowing through the first heat dissipation air duct 231 can form high-efficiency air cooling for the magnetic conducting radial ring 23 and the bearing iron core 211 connected to the radial inner side of the magnetic conducting radial ring 23, thereby effectively preventing the bearing iron core 211 from being overheated and preventing the high-temperature demagnetization of the permanent magnet 22 caused by the overheating of the bearing iron core 211. In the utility model, the first heat dissipation air duct 231 is arranged on the magnetic conducting radial ring 23 instead of being arranged on the bearing iron core 211, so that the arrangement position and the arrangement number and the flow area of the first heat dissipation air duct 231 are not limited by the structure of the bearing iron core 211, the winding slot fullness of the control winding 212 can be higher, and the working performance of the bearing can be improved while ensuring the high-efficiency air cooling of the bearing. In addition, it should be particularly noted that the magnetic conducting radial ring 23 is located on the radial outer side of the bearing iron core 211, has a large inner diameter and a large outer diameter, and has a large magnetic conducting area. Under this premise, the first heat dissipation air duct 231 can be arranged more, thereby ensuring the flow and the cooling effect of the cooling air.
[0039] In a preferred embodiment, a plurality of second heat dissipation air ducts 11 are arranged in the bearing seat 1, each of the second heat dissipation air ducts 11 is arranged in one-to-one correspondence with at least part of the first heat dissipation air ducts 231, and one side port of each of the second heat dissipation air ducts 11 is in communication with one side port of at least part of the first heat dissipation air ducts 231.
[0040] In the technical scheme, by forming at least partial communication between each of the first heat dissipation air ducts 231 in the magnetic conducting radial ring 23 and each of the second heat dissipation air ducts 11 in the bearing seat 1, the smooth communication of the cooling air is realized, and the bearing seat 1 can be efficiently cooled without separately arranging a cooling structure for the bearing seat 1, and the structure is simple.
[0041] In a preferred embodiment, each of the first heat dissipation air ducts 231 and the second heat dissipation air ducts 11 is parallel to the central axis of the bearing iron core 211. It can be understood that the central axis of the bearing iron core 211 coincides with the central axis of the bearing chamber 10. Taking the central axis as a horizontal line, each of the first heat dissipation air ducts 231 and the second heat dissipation air ducts 11 forms left-right communication, and the structure is particularly simple. In a more preferred embodiment, each of the first heat dissipation air ducts 231 is uniformly and spacedly arranged around the central axis of the bearing iron core 211, that is, the circumferential spacing between each of the first heat dissipation air ducts 231 is equal. Correspondingly, the second heat dissipation air ducts 11 are also uniformly and spacedly arranged in the circumferential direction of the bearing iron core 211. In this way, the circumferential uniform cooling of the bearing iron core 211 can be ensured, which is beneficial to ensuring the uniformity of the deformation of the bearing iron core 211 in the circumferential direction and ensuring the regulation accuracy of the radial suspension force of the radial bearing.
[0042] In some embodiments, the magnetic conductive radial ring 23 is formed with a plurality of accommodating grooves 232 on the end face thereof facing the bottom wall of the bearing chamber 10, the aforementioned core assembly is located on the side of the accommodating grooves 232 away from the bottom wall of the bearing chamber 10, the permanent magnets 22 are provided in plurality, each of the permanent magnets 22 is assembled in one-to-one correspondence in each of the accommodating grooves 232, and each of the first heat dissipation air ducts 231 is located on the radial outer side of each of the accommodating grooves 232, the shape of the accommodating grooves 232 matches the shape of the permanent magnets 22, for example, the permanent magnets 22 are fan ring-shaped, the shape of each of the accommodating grooves 232 is also fan ring-shaped, the size of each of the accommodating grooves 232 is consistent with the size of each of the permanent magnets 22, and the size of each of the permanent magnets 22 is the same.
[0043] In the technical solution, the corresponding accommodating grooves 232 are provided on the side end face of the magnetic conductive radial ring 23 to assemble the corresponding permanent magnets 22 in the accommodating grooves 232, without the need to separately provide the magnetic steel fixing frame in the prior art, thereby reducing the number of component assemblies, reducing the manufacturing cost, and significantly reducing the axial thickness of the bearing, which is conducive to reducing the shaft length of the rotating shaft, thereby improving the maximum rotating speed of the rotor. More importantly, in the present application, the permanent magnets 22 are directly assembled in the accommodating grooves 232 on the magnetic conductive radial ring 23, and since the first heat dissipation air ducts 231 are formed in the magnetic conductive radial ring 23, the first heat dissipation air ducts 231 can be used to form high-efficiency air cooling for the permanent magnets 22, thereby further reducing the probability of demagnetization of the permanent magnets 22 due to high temperature.
[0044] In order to further optimize the flow direction of the bias magnetic field, in a preferred embodiment, the radial magnetic floating assembly further comprises a magnetic conductive end ring 24 connected to the end face of the magnetic conductive radial ring 23 facing the bottom wall of the bearing chamber 10 to block the slot opening of each of the accommodating grooves 232.
[0045] In the technical solution, the magnetic conductive end ring 24 is provided on the side of the slot opening of the accommodating groove 232 and connected to the magnetic conductive radial ring 23, which can block the permanent magnets 22 in each of the accommodating grooves 232, thereby simplifying the assembly of each of the permanent magnets 22 (at this time, the permanent magnets 22 only need to be placed in the corresponding accommodating grooves 232 to form the positioning in the circumferential direction, and the axial positioning of each of the permanent magnets 22 is formed by the magnetic conductive end ring 24), and on the other hand, the magnetic conductive end ring 24 enables the bias magnetic field to flow in the radial direction, so that the air gap between the radial inner side thereof and the rotating shaft is as small as possible, thereby ensuring the bias effect.
[0046] In a specific embodiment, eight permanent magnets 22 are provided to reduce the manufacturing cost of the permanent magnets 22.
[0047] The aforementioned magnetic conducting radial ring 23 and the magnetic conducting end ring 24 can be made of 45 steel or other magnetic conducting materials, and the bearing seat 1 can be made of aluminum alloy 6061 or other high-hardness aluminum alloy materials, which can be processed by die casting or precision lathe machining, and are easy to realize in structure.
[0048] In some embodiments, the magnetic conducting radial ring 23 further has an axial protruding ring (not shown in the figure) extending towards the bottom wall of the bearing chamber 10 on the end face of the side of the magnetic conducting radial ring 23 facing the bottom wall of the bearing chamber 10. In the specific assembly, the axial positioning of the radial magnetic suspension assembly is realized by the abutting stop between the outer end face of the axial protruding ring and the bottom wall of the bearing chamber 10. The magnetic conducting end ring 24 is assembled in the axial protruding ring, and the magnetic conducting end ring 24 is in clearance fit with the inner ring wall of the axial protruding ring. The magnetic conducting end ring 24 is provided with a plurality of connecting holes for screws to pass through, which are connected with the end face of the magnetic conducting radial ring 23 by a plurality of screws. It should be noted that the depth of the accommodating groove 232 is preferably equal to the thickness of the permanent magnet 22, so that the magnetic conducting end ring 24 does not need to be further designed and processed, that is, the structure of the magnetic conducting end ring 24 is simplified. It can be understood that the aforementioned magnetic conducting end ring 24 should not protrude from the free end face of the aforementioned axial protruding ring after assembly.
[0049] In some embodiments, the inner ring wall of the magnetic conducting radial ring 23 has a circumferential protruding ring 233 extending radially inwardly therefrom. Each of the accommodating grooves 232 is located on the side end face of the circumferential protruding ring 233 facing the bottom wall of the bearing chamber 10. The side end face of the bearing core 211 close to the bottom wall of the bearing chamber 10 abuts on the side end face of the circumferential protruding ring 233 away from the bottom wall of the bearing chamber 10, so as to realize the positioning of the axial position of the bearing core 211 by the circumferential protruding ring 233. The bearing core 211 is in interference fit with the inner ring wall of the magnetic conducting radial ring 23. The first end head (not shown in the figure) of the control winding 212 protruding from the side end face of the bearing core 211 close to the bottom wall of the bearing chamber 10. The axial thickness of the circumferential protruding ring 233 is not less than the axial height of the first end head, and the first end head is located in the inner ring through hole of the circumferential protruding ring 233.
[0050] In the technical scheme, the circumferential protruding ring 233 serves as the axial positioning structure of the bearing core 211 on the one hand, which ensures that the bearing core 211 can be assembled in place and ensures the assembly precision. On the other hand, the inner ring hole of the circumferential protruding ring 233 forms an accommodating space for the first end head of the control winding 212. Since the first heat dissipation air duct 231 and the circumferential protruding ring 233 are both located on the magnetic conducting radial ring 23, the circumferential protruding ring 233 can effectively cool the first end head and each permanent magnet 22, and further reduce the temperature rise of the bearing.
[0051] In another preferred embodiment, the first heat dissipation air duct 231 further has a third heat dissipation air duct (not shown, not referenced) extending towards the side of the circumferential convex ring 233 and inside the circumferential convex ring 233, so as to further improve the cooling capacity of the circumferential convex ring 233 on the first end head and the permanent magnet 22.
[0052] In some embodiments, the bearing seat 1 has a positioning through hole 12 extending through the bearing chamber 10, the outer ring wall of the magnetic conductive radial ring 23 has a threaded hole corresponding to the position of the positioning through hole 12, the threaded hole extends along the radial direction of the magnetic conductive radial ring 23, and a threaded part (not shown, for example, a bolt) is threadedly connected with the threaded hole via the positioning through hole 12, so as to realize the locking of the circumferential rotation direction of the magnetic conductive radial ring 23.
[0053] According to the embodiments of the present application, a magnetic suspension motor is further provided, which comprises the above magnetic suspension radial hybrid bearing.
[0054] According to the embodiments of the present application, a magnetic suspension motor is further provided, which comprises the above magnetic suspension radial hybrid bearing.
[0055] It is easy for those skilled in the art to understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.
[0056] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the technical principle of the present application, a number of improvements and modifications can be made, and these improvements and modifications shall be regarded as the protection scope of the present application.
Claims
1. A magnetic levitation radial hybrid bearing, characterized in that, The application relates to a bearing seat (1) with a bearing chamber (10) and a radial magnetic floating assembly assembled in the bearing chamber (10), wherein the radial magnetic floating assembly comprises a core assembly (21), a permanent magnet (22) and a magnetic radial ring (23), the core assembly (21) comprises a bearing core (211), the magnetic radial ring (23) is fixedly connected to the radial outer wall of the bearing core (211) to form a magnetic circuit of the permanent magnet (22), the magnetic radial ring (23) is also fixedly connected to the bearing seat (1), and a plurality of first heat dissipation air ducts (231) are arranged in the magnetic radial ring (23), cooling air can flow into the first heat dissipation air ducts (231) from one side port and flow out from the other side port.
2. The magnetic levitation radial hybrid bearing of claim 1, wherein, A plurality of second heat dissipation air ducts (11) are arranged in the bearing seat (1), each of the second heat dissipation air ducts (11) is arranged in one-to-one correspondence with at least part of the first heat dissipation air ducts (231), and one side port of each of the second heat dissipation air ducts (11) is in butt joint communication with one side port of at least part of the first heat dissipation air ducts (231).
3. The magnetic radial hybrid bearing of claim 2, wherein, Each of the first heat dissipation air ducts (231) and the second heat dissipation air ducts (11) is parallel to the central axis of the bearing core (211); and / or each of the first heat dissipation air ducts (231) is uniformly spaced around the central axis of the bearing core (211).
4. The magnetic radial hybrid bearing according to any one of claims 1 to 3, characterized in that An end face of the magnetic radial ring (23) towards the bottom wall of the bearing chamber (10) is formed with a plurality of accommodation grooves (232) arranged around the magnetic radial ring (23), the permanent magnet (22) has a plurality of permanent magnets, each of the permanent magnets (22) is assembled in one-to-one correspondence with each of the accommodation grooves (232), and each of the first heat dissipation air ducts (231) is located at the radial outer side of each of the accommodation grooves (232).
5. The magnetic radial hybrid bearing of claim 4, wherein, The radial magnetic floating assembly further comprises a magnetic end ring (24) connected to the end face of the magnetic radial ring (23) towards the bottom wall of the bearing chamber (10) to block the slot opening of each of the accommodation grooves (232).
6. The magnetic radial hybrid bearing of claim 5, wherein, The end face of the magnetic radial ring (23) towards the bottom wall of the bearing chamber (10) is also provided with an axial protruding ring extending towards the bottom wall of the bearing chamber (10), the magnetic end ring (24) is assembled in the axial protruding ring, and the magnetic end ring (24) is in clearance fit with the inner ring wall of the axial protruding ring.
7. The magnetic radial-axial hybrid bearing of claim 4, wherein, The iron core assembly (21) further comprises a control winding (212) wound on each tooth of the bearing iron core (211), the inner ring wall of the magnetically conductive radial ring (23) has a circumferential convex ring (233) extending radially inwardly therefrom, each of the accommodation grooves (232) is located on a side end face of the circumferential convex ring (233) facing the bottom wall of the bearing chamber (10), the side end face of the bearing iron core (211) close to the bottom wall of the bearing chamber (10) abuts against a side end face of the circumferential convex ring (233) away from the bottom wall of the bearing chamber (10), the end head of the control winding (212) protruding from the side end face of the bearing iron core (211) close to the bottom wall of the bearing chamber (10) is a first end head, the axial thickness of the circumferential convex ring (233) is not less than the axial height of the first end head, and the first end head is located in the inner ring through hole of the circumferential convex ring (233).
8. The magnetic levitation radial hybrid bearing of claim 1, wherein, The bearing seat (1) has a positioning through hole (12) penetrating the bearing chamber (10) inside and outside, the outer ring wall of the magnetically conductive radial ring (23) has a threaded hole corresponding in position to the positioning through hole (12), the threaded hole extends along the radial direction of the magnetically conductive radial ring (23), and a threaded member is threadedly connected with the threaded hole via the positioning through hole (12).
9. A magnetic levitation motor, characterized by, The magnetic levitation radial hybrid bearing according to any one of claims 1 to 8.
10. A magnetic bearing rotary machine characterized by comprising: The magnetic levitation motor according to claim 9.