CN210034173U - Magnetic suspension bearing, motor and compressor - Google Patents
Magnetic suspension bearing, motor and compressor Download PDFInfo
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- CN210034173U CN210034173U CN201920678264.0U CN201920678264U CN210034173U CN 210034173 U CN210034173 U CN 210034173U CN 201920678264 U CN201920678264 U CN 201920678264U CN 210034173 U CN210034173 U CN 210034173U
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- bearing
- magnetic suspension
- iron core
- radial
- protection
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Abstract
The utility model provides a magnetic suspension bearing, motor, compressor. The magnetic suspension bearing comprises an axial magnetic suspension bearing body and a radial protection bearing assembly, wherein the axial magnetic suspension bearing body is used for axially positioning a rotating shaft, the radial protection bearing assembly is used for radially positioning the rotating shaft, and the radial protection bearing assembly is detachably connected to the axial magnetic suspension bearing body. According to the utility model discloses a magnetic suspension bearing, motor, compressor can realize the radial ascending protection of pivot in counter shaft axial positioning, simple structure, easy dismounting, and do not destroy the dynamic balance condition of pivot to can be favorable to guaranteeing high-speed moving reliability and the security of motor.
Description
Technical Field
The utility model belongs to the technical field of the compressor, concretely relates to magnetic suspension bearing, motor, compressor.
Background
The magnetic suspension bearing has the advantages of no mechanical contact, no friction, no abrasion, no need of lubrication, low noise and the like, and is widely applied to occasions with high-speed and ultrahigh-speed rotating speeds. Due to the structural particularity of the magnetic suspension high-speed motor, the magnetic suspension axial bearing generally acts on a thrust disc at the end part of the rotating shaft. The high-speed rotating shaft in the system must have a reliable protection device to improve the safety of the system, and particularly, the design needs to consider the condition that a rotor falls off when a magnetic suspension bearing suddenly fails and is overloaded and the condition that a thrust disc directly collides an axial bearing assembly when the axial direction suddenly loses stability, so that a radial protection device and an axial protection device must be provided for the magnetic suspension bearing system to protect the safe stress of the rotating shaft and the thrust disc thereof under the high-speed operation. The existing protection devices, particularly radial protection devices, are mostly realized by adopting traditional bearings and rotating shafts, but the existing radial protection devices are mostly independent of corresponding axial magnetic suspension bearings, so that the axial positioning of the bearings in the radial protection devices needs to be independently designed, and the design usually needs to improve the rotating shafts; the other way is realized by processing a corresponding retainer groove and a retainer ring in an interference fit manner, which is more important besides increasing the processing difficulty and complicating the process, and when the radial protection device needs to be disassembled, the retainer ring needs to be disassembled, which is most likely to damage the dynamic balance of the rotating shaft. Based on the foregoing insufficiency, the utility model is provided.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model is to provide a magnetic suspension bearing, motor, compressor can realize the radial ascending protection of pivot in counter shaft axial positioning, simple structure, easy dismounting, and do not destroy the dynamic balance condition of pivot to can be favorable to guaranteeing high-speed moving reliability and the security of motor.
In order to solve the problem, the utility model provides a magnetic suspension bearing, including being used for carrying out axial positioning's axial magnetic suspension bearing body and being used for carrying out radial positioning's radial protection bearing assembly to the countershaft, radial protection bearing assembly detachably connect in on the axial magnetic suspension bearing body.
Preferably, the axial magnetic suspension bearing body includes a first iron core and a second iron core which are arranged oppositely, the radial protection bearing assembly includes a bearing seat and a radial bearing, the radial bearing is embedded in a mounting hole in the bearing seat, the second iron core is located between the first iron core and the radial protection bearing assembly, and the bearing seat is bolted to the second iron core.
Preferably, the bearing seat includes a seat body and a cover body, the seat body is configured with a through hole, the through hole extends along an axial direction of the radial bearing, the radial bearing is located in the through hole, and the cover body is located on a side of the seat body far away from the axial magnetic suspension bearing body so as to position an outer ring of the radial bearing.
Preferably, the radial bearing is a ball bearing or a self-lubricating bearing.
Preferably, the first iron core has a first iron core protrusion extending towards the second iron core, a first protection member is further disposed on an inner side of the first iron core protrusion, and a minimum distance between the first protection member and the second iron core is smaller than a minimum distance between the first iron core protrusion and the second iron core in an axial direction of the axial magnetic suspension bearing body; and/or the second iron core is provided with a second iron core protruding part extending towards the first iron core, a second protecting part is further arranged on the inner side of the second iron core protruding part, and in the axial direction of the axial magnetic suspension bearing body, the minimum distance between the second protecting part and the first iron core is smaller than the minimum distance between the second iron core protruding part and the first iron core.
Preferably, the first protector is annular; and/or the second protector is annular.
Preferably, the first protection member is made of a self-lubricating material; and/or the second protection piece is made of a self-lubricating material.
Preferably, the self-lubricating material comprises one of graphite, ceramic and carbon fiber.
The utility model also provides a motor, including foretell magnetic suspension bearing.
The utility model also provides a compressor, including foretell motor.
The utility model provides a magnetic suspension bearing, a motor and a compressor, the axial magnetic suspension bearing body can ensure the stability of the relative position of the magnetic suspension bearing in the axial direction of a rotating shaft, and because the radial protection bearing assembly and the axial magnetic suspension bearing body are detachably connected into a whole, thereby the axial direction of the radial protection bearing component does not need to adopt a retainer ring or a shaft shoulder in the prior art for positioning, thereby greatly simplifying the structure of the magnetic suspension bearing, because the corresponding positioning shaft shoulder or the corresponding groove does not need to be constructed on the rotating shaft, the processing technology is simplified, the corresponding manufacturing cost is reduced, as the retainer ring is not needed to be adopted to position the radial protection bearing axially, the disassembly and the assembly of the magnetic suspension bearing can be greatly simplified, the damage to the dynamic balance condition of the rotating shaft caused by the disassembly and assembly of the corresponding check ring is avoided, and the reliability and the safety of the high-speed operation of the motor can be favorably ensured.
Drawings
Fig. 1 is a schematic structural diagram of the magnetic suspension bearing and the rotating shaft according to the embodiment of the present invention after being assembled;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
The reference numerals are represented as:
11. a first iron core; 12. a second iron core; 13. a first control coil; 14. a second control coil; 15. a first core projection; 16. a second core projection; 17. a third iron core; 18. a permanent magnet; 21. a bearing seat; 211. a base body; 212. a cover body; 22. a radial bearing; 31. a first protector; 32. a second protector; 4. a rotating shaft; 41. a thrust disc; 5. a radial magnetic suspension bearing; 6. a stator assembly.
Detailed Description
Referring to fig. 1 and 2 in combination, according to an embodiment of the present invention, a magnetic suspension bearing is provided, which includes an axial magnetic suspension bearing body for axially positioning a rotating shaft and a radial protection bearing assembly for radially positioning the rotating shaft, wherein the radial protection bearing assembly is detachably connected to the axial magnetic suspension bearing body. In the technical scheme, the axial magnetic suspension bearing body can ensure the stability of the magnetic suspension bearing at the relative position of the rotating shaft 4 in the axial direction, and because the radial protection bearing assembly and the axial magnetic suspension bearing body are detachably connected into a whole, thereby the axial direction of the radial protection bearing component does not need to adopt a retainer ring or a shaft shoulder in the prior art for positioning, thereby greatly simplifying the structure of the magnetic suspension bearing, because the corresponding positioning shaft shoulder or the corresponding groove does not need to be constructed on the rotating shaft, the processing technology is simplified, the corresponding manufacturing cost is reduced, as the axial direction of the radial protection bearing is not required to be positioned by adopting the retainer ring (interference fit), the disassembly and the assembly of the magnetic suspension bearing can be greatly simplified, the damage to the dynamic balance condition of the rotating shaft caused by the disassembly and assembly of the corresponding check ring is avoided, and the reliability and the safety of the high-speed operation of the motor can be favorably ensured.
The axial magnetic suspension bearing body comprises a first iron core 11 and a second iron core 12 which are arranged oppositely, and as can be understood, a first control coil 13 is arranged in the first iron core 11, a second control coil 14 is arranged in the second iron core 12, so that the axial magnetic suspension positioning of the rotating shaft 4 is realized, the radial protection bearing assembly comprises a bearing seat 21 and a radial bearing 22, the radial bearing 22 is embedded in a mounting hole in the bearing seat 21, the second iron core 12 is positioned between the first iron core 11 and the radial protection bearing assembly, and the bearing seat 21 is bolted with the second iron core 12. The radial bearing 22 is a rolling bearing, such as a common ball bearing, a deep groove ball bearing, or a self-lubricating bearing with a self-lubricating function and a high impact resistance. Of course, the bearing seat 21 may also be connected to the second core 12 in other connection manners, for example, a corresponding external threaded column is disposed on one side of the second core 12 facing the bearing seat 21, and a corresponding threaded hole is disposed at a position of the bearing seat 21 corresponding to the external threaded column, so as to achieve threaded connection between the radial protection bearing assembly and the axial magnetic suspension bearing body.
As a specific embodiment of the bearing seat 21, preferably, the bearing seat 21 includes a seat body 211 and a cover body 212, the seat body 211 is configured with a through hole, the through hole extends along an axial direction of the radial bearing 22, the radial bearing 22 is located in the through hole, and the cover body 212 is located on a side of the seat body 211 away from the axial magnetic suspension bearing body to locate an outer ring of the radial bearing 22. It can be understood that the cover 212 is also configured with a through hole matching with the rotating shaft 4, and the cover 212 is detachably connected to the opening side of the bearing seat 21, so as to prevent impurities such as external dust from entering the bearing seat 21 and protect the radial bearing 22.
In order to prevent the stator assembly 6 and the magnetic suspension bearing from being damaged by the lack of necessary support of the rotating shaft 4 when the axial magnetic suspension bearing body is out of control, it is preferable that the first iron core 11 has a first iron core protrusion 15 extending toward the second iron core 12, the first control coil 13 is wound on the outer side of the first iron core protrusion 15, the inner side of the first iron core protrusion 15 is further provided with a first protector 31, and the minimum distance between the first protector 31 and the second iron core 12 in the axial direction of the axial magnetic suspension bearing body is smaller than the minimum distance between the first iron core protrusion 15 and the second iron core 12; and/or the second iron core 12 has a second iron core protrusion 16 extending towards the first iron core 11, the second control coil 14 is wound outside the second iron core protrusion 16, a second protection member 32 is further arranged inside the second iron core protrusion 16, and a minimum distance between the second protection member 32 and the first iron core 11 in the axial direction of the axial magnetic suspension bearing body is smaller than a minimum distance between the second iron core protrusion 16 and the first iron core 11. When the magnetic suspension bearing is assembled with the rotating shaft 4, the rotating shaft 4 has the thrust disc 41 which is located in the gap formed by the first protection member 31 and the second protection member 32, that is, the gap formed by the first core protrusion 15 and the second core protrusion 16, and when the rotating shaft 4 moves axially, the thrust disc 41 first contacts the first protection member 31 or the second protection member 32 which is closer to the first protection member 31 or the second protection member 32, so that the thrust disc 41 is prevented from colliding with the first core protrusion 15 or the second core protrusion 16, and the magnetic suspension bearing is protected from being damaged. The first protection piece 31 is annular and is embedded in an inner hole formed by the first iron core protrusion part 15 in a surrounding manner; and/or, the second protection member 32 is annular and is embedded in an inner hole formed by the first core protrusion 15. Further, the first protector 31 and/or the second protector 32 are made of a self-lubricating material, such as one of graphite, ceramic and carbon fiber, which is selected to have a certain rigidity so as to be able to withstand the impact that the thrust disc 41 may produce, but the aforementioned graphite, ceramic and carbon fiber have the advantage of withstanding high temperatures in addition to being able to withstand large impact forces.
According to the embodiment of the present invention, there is also provided a motor, including the above magnetic suspension bearings, it can be understood that the magnetic suspension bearings have two sets, and the two sets of magnetic suspension bearings are respectively located at two axial ends of the rotating shaft 4; furthermore, a plurality of radial magnetic suspension bearings 5 can be arranged on the rotating shaft 4, so that the magnetic suspension state of the rotating shaft 4 in the radial direction and the axial direction is realized, and the requirement of high-speed rotation of the rotating shaft is effectively met. When the radial magnetic suspension bearing 5 and the magnetic suspension bearing are out of control (that is, the magnetic suspension support fails) or the axial instability (axial play), the radial protective bearing assembly supports the rotating shaft 4 rotating at a high speed in a short time, so that the rotating shaft 4 is effectively prevented from colliding with the radial magnetic suspension bearing 5 and the stator assembly 6, and all radial forces and part of axial forces are borne; the first protector 31 and the second protector 32 in the axial magnetic suspension bearing body place the first iron core 11 and the second iron core 12 to collide with the thrust disc 41 in a short time.
In a specific assembly aspect, as shown in fig. 1, the first protection member 31 and the second protection member 32 are first assembled in corresponding grooves of the first iron core 11 and the second iron core 12 (that is, the first iron core protrusion 15 and the second iron core protrusion 16 respectively form inner holes), then the rotating shaft 4 is inserted into the inner hole of the first iron core 11, then the first control coil 13, the permanent magnet 18, the third iron core 17, the second protection member 32, and the second iron core 12 are sequentially assembled from right to left according to the orientation shown in fig. 1, then the base body 211 and the second iron core 12 are bolted, then the radial bearing 22 is assembled into the mounting hole of the base body 211, and finally the cover body 212 and the base body 211 are connected, and the reverse order is achieved during disassembly.
According to the utility model discloses an embodiment still provides a compressor, including foretell motor.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The magnetic suspension bearing is characterized by comprising an axial magnetic suspension bearing body and a radial protection bearing assembly, wherein the axial magnetic suspension bearing body is used for axially positioning a rotating shaft, the radial protection bearing assembly is used for radially positioning the rotating shaft, and the radial protection bearing assembly is detachably connected to the axial magnetic suspension bearing body.
2. Magnetic bearing according to claim 1, characterized in that the axial magnetic bearing body comprises a first iron core (11) and a second iron core (12) which are oppositely arranged, the radial protection bearing assembly comprises a bearing seat (21) and a radial bearing (22), the radial bearing (22) is embedded in a mounting hole in the bearing seat (21), the second iron core (12) is arranged between the first iron core (11) and the radial protection bearing assembly, and the bearing seat (21) is bolted with the second iron core (12).
3. The magnetic suspension bearing according to claim 2, characterized in that the bearing seat (21) comprises a seat body (211) and a cover body (212), the seat body (211) is configured with a through hole, the through hole extends along the axial direction of the radial bearing (22), the radial bearing (22) is arranged in the through hole, and the cover body (212) is arranged on the side of the seat body (211) far away from the axial magnetic suspension bearing body to position the outer ring of the radial bearing (22).
4. Magnetic bearing according to claim 2, characterized in that the radial bearing (22) is a ball bearing or a self-lubricating bearing.
5. Magnetic bearing according to claim 2, characterized in that the first core (11) has a first core protrusion (15) extending towards the second core (12), the inside of the first core protrusion (15) is further provided with a first protector (31), and the minimum distance between the first protector (31) and the second core (12) in the axial direction of the magnetic bearing body is smaller than the minimum distance between the first core protrusion (15) and the second core (12); and/or the second iron core (12) is provided with a second iron core bulge part (16) extending towards the first iron core (11), a second protection part (32) is further arranged on the inner side of the second iron core bulge part (16), and the minimum distance between the second protection part (32) and the first iron core (11) is smaller than the minimum distance between the second iron core bulge part (16) and the first iron core (11) in the axial direction of the axial magnetic suspension bearing body.
6. Magnetic suspension bearing according to claim 5, characterized in that the first protector (31) is annular; and/or the second protection member (32) is annular.
7. Magnetic suspension bearing according to claim 6, characterized in that the first protector (31) is made of a self-lubricating material; and/or the second protection member (32) is made of a self-lubricating material.
8. Magnetic suspension bearing according to claim 7, characterized in that the self-lubricating material comprises one of graphite, ceramic, carbon fibre.
9. An electric machine comprising a magnetic bearing, characterized in that the magnetic bearing is a magnetic bearing according to any of claims 1 to 8.
10. A compressor comprising an electric motor, wherein the electric motor is the electric motor of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920678264.0U CN210034173U (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920678264.0U CN210034173U (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor and compressor |
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| Publication Number | Publication Date |
|---|---|
| CN210034173U true CN210034173U (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920678264.0U Active CN210034173U (en) | 2019-05-13 | 2019-05-13 | Magnetic suspension bearing, motor and compressor |
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| Country | Link |
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| CN (1) | CN210034173U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323900A (en) * | 2021-06-03 | 2021-08-31 | 福建省福能龙安热电有限公司 | Energy-saving high-pressure fluidized fan device for circulating fluidized bed boiler |
-
2019
- 2019-05-13 CN CN201920678264.0U patent/CN210034173U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323900A (en) * | 2021-06-03 | 2021-08-31 | 福建省福能龙安热电有限公司 | Energy-saving high-pressure fluidized fan device for circulating fluidized bed boiler |
| CN113323900B (en) * | 2021-06-03 | 2022-05-13 | 福建省福能龙安热电有限公司 | Energy-saving high-pressure fluidized fan device for circulating fluidized bed boiler |
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