CN211501341U - Novel magnetic suspension bearing assembly - Google Patents
Novel magnetic suspension bearing assembly Download PDFInfo
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- CN211501341U CN211501341U CN201922383892.9U CN201922383892U CN211501341U CN 211501341 U CN211501341 U CN 211501341U CN 201922383892 U CN201922383892 U CN 201922383892U CN 211501341 U CN211501341 U CN 211501341U
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Abstract
The utility model discloses a novel magnetic suspension bearing assembly relates to magnetic suspension bearing technical field, its characterized in that: the axial displacement sensor comprises a first axial magnetic bearing, a second axial magnetic bearing and an axial magnetic bearing rotor, wherein the first axial magnetic bearing and the second axial magnetic bearing are arranged in parallel, two ends of the first axial magnetic bearing and two ends of the second axial magnetic bearing are aligned, the axial magnetic bearing rotor and an axial magnetic bearing spacer ring are arranged between the first axial magnetic bearing and the second axial magnetic bearing, a rotor part is arranged on the left side of the axial magnetic bearing rotor, the right end face of the axial magnetic bearing spacer ring is aligned with the right end face of the first axial magnetic bearing, an auxiliary bearing is installed in the inner ring of the second axial magnetic bearing, and an axial displacement. The utility model discloses a with auxiliary bearing and axial displacement sensor integration in axial magnetic bearing, reduced part quantity, retrencied the device structure, simplified the means of adjustment working gap.
Description
Technical Field
The utility model relates to a magnetic suspension bearing technical field indicates a novel magnetic suspension bearing assembly especially.
Background
The motor supported by magnetic suspension bearings is generally composed of a pair of axial magnetic bearings and a magnetic bearing rotor fixedly connected with the rotor, and meanwhile, in order to realize active control, a sensor for checking axial displacement and an auxiliary bearing structure for safety guarantee are arranged. When the auxiliary bearing is arranged in the main machine as an essential role, a matched structure, namely an auxiliary bearing seat and a pressing ring, is required. Also, axial displacement sensors, because of their essential characteristics, also require an outer structure, such as a sensor holder, to be arranged within the host machine. Because these supporting structures all need install in the host computer, caused loading and unloading loaded down with trivial details, occupied space is big and increase trouble spot scheduling problem easily. In addition, because the assembly position of the auxiliary bearing is related to the working position of the rotor between the magnetic bearings, the additional structure causes the assembly position of the auxiliary bearing to have difference, and the difference is caused by the assembly error and the processing error of the auxiliary bearing seat.
Disclosure of Invention
The technical purpose is as follows: an object of the utility model is to provide a novel magnetic suspension bearing assembly integrates auxiliary bearing, axial displacement sensor and axial magnetic bearing together to effectively reduce spare part quantity, simplify the adjustment means of magnetic bearing working gap.
The technical scheme is as follows: in order to achieve the above purpose, the utility model adopts the following technical scheme:
a novel magnetic suspension bearing assembly is characterized in that: the axial displacement sensor comprises a first axial magnetic bearing, a second axial magnetic bearing and a rotor of the axial magnetic bearing, wherein the first axial magnetic bearing and the second axial magnetic bearing are arranged in parallel and aligned at two ends, the rotor of the axial magnetic bearing and a spacer ring of the axial magnetic bearing are arranged between the first axial magnetic bearing and the second axial magnetic bearing, a rotor part is arranged on the left side of the rotor of the axial magnetic bearing, the right end face of the spacer ring of the axial magnetic bearing is aligned with the right end face of the first axial magnetic bearing, an auxiliary bearing is arranged in the inner ring of the second axial magnetic bearing, and an axial displacement sensor is arranged on the.
Preferably, an end cover is arranged below the rotor part, and the rotor part is in threaded connection with the end cover; an axial gap adjusting sleeve with a left end face aligned is arranged below the axial magnetic bearing rotor, the lower end face of the axial gap adjusting sleeve is connected with the upper end face of the end cover and is axially compressed through the end cover, a step face is arranged on one side, close to the auxiliary bearing, of the axial gap adjusting sleeve, and the upper end face of the end cover and the step face of the axial gap adjusting sleeve limit the auxiliary bearing.
Preferably, copper wires are installed inside the first axial magnetic bearing and the second axial magnetic bearing, a radial magnetic bearing is arranged above the first axial magnetic bearing, the left side of the radial magnetic bearing is connected with the rotor component, the copper wires are arranged at the upper end and the lower end of the radial magnetic bearing, a magnetic bearing pressure plate is arranged above the radial magnetic bearing, a bearing seat is arranged below the magnetic bearing pressure plate, the magnetic bearing pressure plate is in threaded connection with the bearing seat, one side of the bearing seat is connected with the radial magnetic bearing, an axial magnetic bearing pressure plate is arranged below the bearing seat, the bearing seat is in threaded connection with the axial magnetic bearing pressure plate, and the lower end face of the second axial magnetic bearing is connected with the axial magnetic bearing pressure plate and is axially compressed through.
Preferably, the fit between the rotor component and the axial clearance adjustment sleeve is a small interference fit.
Preferably, the axial gap adjusting sleeve is made of brass.
Has the advantages that: the axial displacement sensor is arranged on the thrust surface of the bearing magnetic bearing, so that the probability of failure is reduced, and the axial displacement sensor is well protected; by adopting small interference fit between the rotor component and the axial clearance adjusting sleeve, the structure is stable, and the centering performance is good; the auxiliary bearing and the axial displacement sensor are integrated in the axial magnetic bearing, so that the number of parts is reduced, the structure of the device is simplified, and the means for adjusting the working clearance is simplified.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is an overall diagram of a novel magnetic suspension bearing.
Wherein: 1. a rotor component; 2. an axial magnetic bearing I; 3. an axial magnetic bearing rotor; 4. an axial displacement sensor; 5. an axial clearance adjusting sleeve; 6. an end cap; 7. an axial magnetic bearing spacer ring; 8. a second axial magnetic bearing; 9. an auxiliary bearing; 10. an axial magnetic bearing platen; 11. a radial magnetic bearing; 12. a magnetic bearing platen; 13. a motor housing; 14. a bearing seat; 15. copper wire.
Detailed Description
In the description of the present invention, it should be noted that, if the terms "left end", "right end", "upper and lower end faces", etc. appear, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or original article referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following describes in detail embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1, a novel magnetic suspension bearing assembly comprises a first axial magnetic bearing 2, a second axial magnetic bearing 8 and a rotor 3 of the axial magnetic bearing, wherein the first axial magnetic bearing 2 and the second axial magnetic bearing 8 are arranged in parallel and aligned at two ends, the rotor 3 and a spacer 7 of the axial magnetic bearing are arranged between the first axial magnetic bearing 2 and the second axial magnetic bearing 8, the rotor part 1 is arranged on the left side of the rotor 3 of the axial magnetic bearing, the right end surface of the spacer 7 of the axial magnetic bearing is aligned with the right end surface of the first axial magnetic bearing 2, an auxiliary bearing 9 is arranged in the inner ring of the second axial magnetic bearing 8, an axial displacement sensor 4 is arranged on the thrust surface of the second axial magnetic bearing 8, and the second axial magnetic bearing plays a role as a sensor.
An axial gap adjusting sleeve 5 with the left end face aligned is arranged below the axial magnetic bearing rotor 3, the axial gap adjusting sleeve 5 is usually made of brass, the axial gap adjusting sleeve 5 can be detached, when the working gap does not meet the expected requirement, the axial gap adjusting sleeve 5 is detached, the upper end face and the lower end face can be adjusted, the lower end face of the axial gap adjusting sleeve 5 is connected with the upper end face of the end cover 6 and is axially compressed through the end cover 6, a step face is arranged on one side, close to the auxiliary bearing 9, of the axial gap adjusting sleeve 5, the upper end face of the end cover 6 and the step face of the axial gap adjusting sleeve 5 limit the auxiliary bearing 9, and the lower end faces of the two axial magnetic bearing pressing plates 8 are connected with the axial magnetic bearing pressing plate 10 and are axially compressed.
The utility model discloses a working process does: after the coils in the first axial magnetic bearing 2 and the second axial magnetic bearing 8 are electrified, the two axial magnetic bearings generate electromagnetic attraction to attract the rotor 3 of the axial magnetic bearing to be suspended between the two axial magnetic bearings, and the distance between the two axial magnetic bearings is limited by the axial magnetic bearing spacer 7. During normal operation, during standstill, or even in the event of a malfunction, the axial magnetic bearings 2, 8 should not come into contact with the axial magnetic bearing rotor 3, so that a further limitation of the range of motion of the axial magnetic bearing rotor 3 is required. The axial play adjustment sleeve 5, the end cover 6 and the auxiliary bearing 9 further limit the range of motion of the axial magnetic bearing rotor 3, ensuring that the auxiliary bearing 9 first contacts the rotor part 1 during shutdown and failure. By adjusting the distance between the two step surfaces of the axial clearance adjusting sleeve 5 and the end cover 6, the movement range of the axial magnetic bearing rotor 3 can be limited to an interval smaller than the thickness of the axial magnetic bearing spacer 7. The axial clearance adjusting sleeve 5 maintains a certain machining allowance, and after the axial clearance adjusting sleeve 5 is assembled to the rotor part 1, a dimension fine adjustment is carried out on the axial clearance adjusting sleeve 5 through actual measurement so as to ensure that the motion range of the axial magnetic bearing rotor 3 is in a proper interval.
For ease of understanding, a specific example is given below for further explanation.
The thickness of the spacer ring 7 of the axial magnetic bearing is 32mm, and the thickness of the rotor 3 of the axial magnetic bearing is 30mm, so that the motion range of the rotor 3 of the axial magnetic bearing between the two axial magnetic bearings is 32-30=2 mm. The distance between the two stepped surfaces of the axial clearance adjusting sleeve 5 and the end cover 6 is initially 1.8mm, and if this value is slightly larger, the axial clearance adjusting sleeve 5 is removed by 0.3mm, and the distance between the two stepped surfaces of the axial clearance adjusting sleeve 5 and the end cover 6 becomes 1.8-0.3=1.5 mm. The side of the axial clearance adjusting sleeve 5 in contact with the axial magnetic bearing rotor 3 is adjusted according to the interval position within 1.5mm to 2 mm. In the whole adjusting process, only the axial clearance adjusting sleeve 5 needs to be adjusted.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (4)
1. A novel magnetic suspension bearing assembly is characterized in that: the magnetic bearing comprises a first axial magnetic bearing (2), a second axial magnetic bearing (8) and a rotor (3) of the axial magnetic bearing, wherein the first axial magnetic bearing (2) and the second axial magnetic bearing (8) are arranged in parallel and have two ends aligned, the rotor (3) of the axial magnetic bearing and an axial magnetic bearing spacer ring (7) are arranged between the first axial magnetic bearing (2) and the second axial magnetic bearing (8), the rotor (3) of the axial magnetic bearing is suspended between the first axial magnetic bearing (2) and the second axial magnetic bearing (8) under the action of electromagnetic attraction force, the distance between the two axial magnetic bearings is limited by the axial magnetic bearing spacer ring (7), the left side of the rotor (3) of the axial magnetic bearing is provided with a rotor component (1), the right end surface of the axial magnetic bearing spacer ring (7) is aligned with the right end surface of the first axial magnetic bearing (2), and an auxiliary bearing (9), and an axial displacement sensor (4) is arranged on a thrust surface of the axial magnetic bearing II (8).
2. The assembly of claim 1, wherein: an end cover (6) is arranged below the rotor part (1), and the rotor part (1) is in threaded connection with the end cover (6); an axial gap adjusting sleeve (5) with the left end face aligned is arranged below the axial magnetic bearing rotor (3), the lower end face of the axial gap adjusting sleeve (5) is connected with the upper end face of the end cover (6) and is axially compressed through the end cover (6), a step face is arranged on one side, close to the auxiliary bearing (9), of the axial gap adjusting sleeve (5), and the upper end face of the end cover (6) and the step face of the axial gap adjusting sleeve (5) limit the auxiliary bearing (9).
3. The assembly of claim 1, wherein: the axial magnetic bearing (2) and the axial magnetic bearing (8) are internally provided with copper wires (15), a radial magnetic bearing (11) is arranged above the axial magnetic bearing (2), the left side of the radial magnetic bearing (11) is connected with the rotor component (1), the copper wires (15) are arranged at the upper end and the lower end of the radial magnetic bearing (11), a magnetic bearing plate (12) is arranged above the radial magnetic bearing (11), a bearing seat (14) is arranged below the magnetic bearing plate (12), the magnetic bearing plate (12) is in threaded connection with the bearing seat (14), one side of the bearing seat (14) is connected with the radial magnetic bearing (11), an axial magnetic bearing plate (10) is arranged below the bearing seat (14), the bearing seat (14) is in threaded connection with the axial magnetic bearing plate (10), and the lower end face of the axial magnetic bearing (8) is connected with the axial magnetic bearing plate (10) and enters the axial magnetic bearing plate (10) The rows are compressed axially.
4. The assembly of claim 2, wherein: the axial clearance adjusting sleeve (5) is made of brass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922383892.9U CN211501341U (en) | 2019-12-26 | 2019-12-26 | Novel magnetic suspension bearing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922383892.9U CN211501341U (en) | 2019-12-26 | 2019-12-26 | Novel magnetic suspension bearing assembly |
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| Publication Number | Publication Date |
|---|---|
| CN211501341U true CN211501341U (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922383892.9U Active CN211501341U (en) | 2019-12-26 | 2019-12-26 | Novel magnetic suspension bearing assembly |
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| CN (1) | CN211501341U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894855A (en) * | 2019-12-26 | 2020-03-20 | 南京磁谷科技有限公司 | Novel magnetic suspension bearing assembly |
| CN110894855B (en) * | 2019-12-26 | 2024-05-28 | 南京磁谷科技股份有限公司 | Magnetic suspension bearing assembly |
-
2019
- 2019-12-26 CN CN201922383892.9U patent/CN211501341U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894855A (en) * | 2019-12-26 | 2020-03-20 | 南京磁谷科技有限公司 | Novel magnetic suspension bearing assembly |
| CN110894855B (en) * | 2019-12-26 | 2024-05-28 | 南京磁谷科技股份有限公司 | Magnetic suspension bearing assembly |
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Address after: No.99 Jinxin Middle Road, Jiangning District, Nanjing, Jiangsu Province, 211100 (Jiangning Development Zone) Patentee after: Nanjing Cigu Technology Co.,Ltd. Address before: No. 100, Jiuzhu Road, Jiangning Economic Development Zone, Jiangning District, Nanjing City, Jiangsu Province, 211100 Patentee before: NANJING CIGU Ltd.,Corp. |
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| CP03 | Change of name, title or address |