CN114607704B - Radial permanent magnet suspension bearing - Google Patents
Radial permanent magnet suspension bearing Download PDFInfo
- Publication number
- CN114607704B CN114607704B CN202210338204.0A CN202210338204A CN114607704B CN 114607704 B CN114607704 B CN 114607704B CN 202210338204 A CN202210338204 A CN 202210338204A CN 114607704 B CN114607704 B CN 114607704B
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- permanent magnets
- stator
- permanent magnet
- stator permanent
- rotor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/0408—Passive magnetic bearings
- F16C32/041—Passive magnetic bearings with permanent magnets on one part attracting the other part
- F16C32/0412—Passive magnetic bearings with permanent magnets on one part attracting the other part for radial load mainly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/0408—Passive magnetic bearings
- F16C32/0423—Passive magnetic bearings with permanent magnets on both parts repelling each other
- F16C32/0425—Passive magnetic bearings with permanent magnets on both parts repelling each other for radial load mainly
Abstract
The invention provides a radial permanent magnet suspension bearing, which comprises an annular rotor matrix, at least three annular rotor permanent magnets sleeved outside the rotor matrix and closely attached between adjacent axial directions, wherein the polarities of the magnetic poles of the outer circumferences of the adjacent rotor permanent magnets are opposite, the radial permanent magnet suspension bearing also comprises an annular stator matrix, a plurality of first stator permanent magnets and a plurality of second stator permanent magnets which are arranged on the inner wall of the stator matrix in a surrounding manner, the plurality of first stator permanent magnets and the plurality of rotor permanent magnets are arranged in a one-to-one correspondence manner in the axial direction, and the polarities of the magnetic poles are opposite to form a pulling and pushing magnetic circuit; the plurality of second stator permanent magnets and the plurality of rotor permanent magnets are arranged in a one-to-one correspondence manner in the axial direction, and the polarities of the magnetic poles are the same to form a repulsive magnetic circuit. The radial permanent magnet suspension bearing provided by the invention does not need a mechanical bearing as an auxiliary micro-fulcrum, and can overcome the defect that the existing permanent magnet suspension bearing cannot completely get rid of the influence of friction force and has smaller bearable radial force.
Description
Technical Field
The invention relates to the field of magnetic suspension, in particular to a radial permanent magnet suspension bearing.
Background
Magnetic levitation has wide application prospects in various industries, but electromagnetic levitation is complex in structure and control and needs to consume a large amount of electric energy. The superconducting suspension needs to be participated by liquid nitrogen, and the cost is high. According to the enshao theorem, static stable suspension of permanent magnets is not achievable, and because the control system of electromagnetic suspension is too complex, superconducting suspension needs to be provided with liquid nitrogen, and the cost is high, a plurality of patents of suction type and repulsive type are explored for permanent magnet suspension. The inventor Li Guokun breaks through the theory, and considers that the lower the static magnetic energy of a permanent magnet system is, the more stable is the static magnetic energy, and the realization of static suspension of the permanent magnet is verified through tens of thousands of experiments, and the application is in some fields, and the permanent magnet suspension bearing is an important application, but the current radial permanent magnet suspension bearing belongs to a bearing with fulcrum micro friction, cannot completely get rid of the influence of friction force, and meanwhile, the bearable radial force is smaller.
Disclosure of Invention
The invention provides a radial permanent magnet suspension bearing, which does not need a mechanical bearing as an auxiliary micro-fulcrum, and can overcome the defect that the existing permanent magnet suspension bearing cannot completely get rid of the influence of friction force and has smaller bearable radial force.
The radial permanent magnet suspension bearing comprises an annular rotor matrix, at least three annular rotor permanent magnets sleeved outside the rotor matrix and closely attached between the adjacent axial directions, wherein the magnetic poles of the outer circumferences of the adjacent rotor permanent magnets are opposite, the radial permanent magnet suspension bearing also comprises an annular stator matrix, a plurality of first stator permanent magnets and a plurality of second stator permanent magnets, wherein the plurality of first stator permanent magnets and the plurality of second stator permanent magnets are arranged on the inner wall of the stator matrix in a surrounding mode, the number and the attaching mode of the two types of magnets are the same, the axial sizes of the two types of magnets are the same, the axial size of the second stator permanent magnets is smaller than the axial size of the rotor permanent magnets, the first stator permanent magnets and the second stator permanent magnets are positioned on the same annular body and are symmetrical relative to the same vertical section passing through the axis of the stator matrix, the vertical section is vertical to the horizontal plane, the first stator permanent magnets are positioned on the upper part of the annular body, the second stator permanent magnets are positioned on the lower part of the annular body, the central angle of the second stator permanent magnets is larger than or equal to 195 DEG, the radial size of the second stator permanent magnets is larger than the radial size of the first stator permanent magnets, the magnetic energy of the second stator permanent magnets is larger than the magnetic energy of the first stator permanent magnets is equal to the magnetic energy of the first stator permanent magnets, the magnetic energy is larger than the magnetic energy of the first stator permanent magnets and the magnetic poles and magnetic poles are opposite to the magnetic poles of the first stator permanent magnets are arranged on the magnetic poles are opposite to the magnetic poles of the first stator permanent magnets; the plurality of second stator permanent magnets and the plurality of rotor permanent magnets are arranged in one-to-one correspondence in the axial direction, the second stator permanent magnets are arranged in the center relative to the rotor permanent magnets corresponding to the second stator permanent magnets in the axial direction, the magnetic pole polarity of the inner wall of the second stator permanent magnets is the same as the magnetic pole polarity of the outer wall of the rotor permanent magnets corresponding to the second stator permanent magnets, and the plurality of rotor permanent magnets and the second stator permanent magnets corresponding to the rotor permanent magnets form a repulsive magnetic circuit.
Preferably, the inner diameter of the first stator permanent magnet is larger than the inner diameter of the second stator permanent magnet.
Preferably, the maximum magnetic energy product of the second stator permanent magnet is 1.2 or more of the maximum magnetic energy product of the first stator permanent magnet.
Preferably, the second stator permanent magnet adopts a 45SH neodymium-iron-boron magnet, and the first stator permanent magnet adopts a 35SH neodymium-iron-boron magnet.
Preferably, the central angle of the first stator permanent magnet is 115 degrees to 130 degrees, and the central angle of the second stator permanent magnet is 195 degrees to 205 degrees.
Preferably, the central angle of the second stator permanent magnet is 200 degrees, and the central angle of the first stator permanent magnet is 130 degrees. ,
compared with the prior art, the radial permanent magnet suspension bearing has the following beneficial effects:
1. the first stator permanent magnet and the second stator permanent magnet of the radial permanent magnet suspension bearing are symmetrical in axial section through the same axis of the stator matrix. When the permanent magnet suspension bearing is arranged on a horizontal rotating shaft, the first stator permanent magnet is positioned above the second stator permanent magnet, and the axial section is a plane vertical to the horizontal plane. Under the action of the gravity of the rotor matrix, the gravity of the rotor permanent magnet, the gravity of the rotating shaft and the load (without other external force), the axis of the rotor permanent magnet, the axis of the rotating shaft and the axis of the stator matrix are coincident, namely the rotor permanent magnet is positioned at the center of the stator matrix. When the radial permanent magnet suspension bearing is applied, the inner wall of the rotor matrix is fixed with a horizontal rotating shaft and synchronously rotates with the rotating shaft under the drive of the rotatable shaft. The stress condition of the rotor is as follows, in the downward direction, the gravity of the rotor matrix, the gravity of the rotor permanent magnet, the gravity of the rotating shaft, the gravity of the load and the gravity=g, the upward force is the heteropolar attractive force fsrap generated by the first stator permanent magnet to a pull-push magnetic circuit formed by a plurality of rotor permanent magnets and the homopolar repulsive force fsrap generated by the second stator permanent magnet to a repulsive magnetic circuit formed by a plurality of rotor permanent magnets, fsrap=g, and the levitation force and the stable rigidity are greatly increased by the two upward forces. When the rotation shaft is subjected to downward external force to move downward, the F repulsion increase prevents the rotation shaft from moving downward, and when the rotation shaft is subjected to upward external force, the F repulsion decrease prevents the rotation shaft from moving upward. According to the radial permanent magnet suspension bearing, the F attraction generated by the first stator permanent magnet to the rotor permanent magnet and the F repulsion generated by the second stator permanent magnet to the rotor permanent magnet are combined, so that the load born by the bearing and the external force in the axial downward direction can be obviously improved. In the invention, the first stator permanent magnet is positioned at the upper part of the ring shape, the second stator permanent magnet is positioned at the lower part of the ring shape, the central angle of the second stator permanent magnet is more than or equal to 195 DEG, and the radial dimension of the second stator permanent magnet is more than that of the first stator permanent magnet, and according to the permanent magnet energy theory of the inventor of the application, the permanent magnet system strives for the lowest permanent magnet energy. Therefore, the horizontal direction has axial repulsive force left and right self-stabilization; the attraction force of the upper and lower pushing magnetic circuits is thin, the angle is small, the low performance (magnetic) energy is small in negative rigidity, and the absolute value is greatly smaller than the positive rigidity of the repulsive magnetic circuit and is stable. The axial design makes the lower repulsive magnetic circuit axially narrow, so that the axial direction is positive rigidity, and permanent magnet suspension is realized.
2. When the permanent magnet suspension bearing is arranged on a horizontal rotating shaft, the first stator permanent magnet is arranged on the upper part, the second stator permanent magnet is arranged on the lower part, the axial section is a plane vertical to the horizontal plane, and two ends of the second stator permanent magnet extend to the upper part of the horizontal plane passing through the axis. The feature combines one or two or three measures of increasing the volume of the second stator permanent magnet, enabling the second stator permanent magnet to be closer to the rotor permanent magnet and enabling the second permanent magnet to be made of a material with a higher maximum magnetic energy product, when the rotating shaft is subjected to external force in the horizontal direction to deflect in the horizontal direction, the repulsive force of the second stator permanent magnet on the rotor permanent magnet in the direction opposite to the external force can be larger, the rotating shaft is easier to prevent from further deflection, and therefore the rotor permanent magnet can obtain greater stability in the horizontal direction.
Drawings
Fig. 1 is an axial cross-sectional schematic view of a radial permanent magnet suspension bearing according to an embodiment of the present invention.
Fig. 2 is a schematic radial cross-sectional view of a radial permanent magnet suspension bearing according to an embodiment of the present invention.
Fig. 3 is an axial cross-sectional schematic view of a radial permanent magnet suspension bearing according to another embodiment of the present invention.
Fig. 4 is a schematic radial cross-sectional view of a radial permanent magnet suspension bearing according to another embodiment of the present invention.
Reference numerals
1 rotor matrix, 2 rotor permanent magnet, 3 stator matrix, 4 first stator permanent magnet, 5 second stator permanent magnet, 6 rotation axis.
Detailed Description
The invention provides a radial permanent magnet suspension bearing which can be applied to a horizontal shaft, as shown in fig. 1 and 2, and comprises an annular rotor matrix 1, at least three annular rotor permanent magnets 2 which are sleeved between adjacent shafts outside the rotor matrix 1 and are tightly attached, a plurality of rotor permanent magnets 2 are arranged along the axis of the rotor matrix 1, the polarities of the magnetic poles of the outer circumferences of the adjacent rotor permanent magnets 2 are opposite, the radial permanent magnet suspension bearing also comprises an annular stator matrix 3, a plurality of first stator permanent magnets 4 and a plurality of second stator permanent magnets 5 which are circumferentially arranged on the inner wall of the stator matrix 3, the number and the attaching mode of the first stator permanent magnets 4 and the rotor permanent magnets 2 are the same, the axial sizes of the two magnets are also the same, and the axial size of the second stator permanent magnets 5 is smaller than the axial size of the rotor permanent magnets 2. The first stator permanent magnet 4 and the second stator permanent magnet 5 are located on the same annular body, form two different parts of the same annular body, and are symmetrical to the same vertical section passing through the axis of the stator base body, the vertical section is perpendicular to the horizontal plane, the first stator permanent magnet 4 is located on the annular upper part, and the second stator permanent magnet 5 is located on the annular lower part. In this embodiment, the center of the central angle of the first stator permanent magnet 4 coincides with the center of the central angle of the second stator permanent magnet 5. The central angle of the second stator permanent magnet 5 is larger than or equal to 195 degrees, the radial dimension of the second stator permanent magnet 5 is larger than the radial dimension of the first stator permanent magnet 4, and the magnetic energy product of the second stator permanent magnet 5 is larger than the magnetic energy product of the first stator permanent magnet 4. The plurality of first stator permanent magnets 4 and the plurality of rotor permanent magnets 2 are arranged in one-to-one correspondence in the axial direction, the magnetic pole polarity of the inner wall of the first stator permanent magnet 4 is opposite to the magnetic pole polarity of the outer wall of the rotor permanent magnet 2 opposite to the first stator permanent magnet, and the plurality of rotor permanent magnets 2 and the first stator permanent magnets 4 corresponding to the plurality of rotor permanent magnets form a pull-push magnetic circuit; the plurality of second stator permanent magnets 5 and the plurality of rotor permanent magnets 2 are arranged in one-to-one correspondence in the axial direction, the second stator permanent magnets 5 are arranged in the center relative to the corresponding rotor permanent magnets 2 in the axial direction, gaps are arranged between the adjacent second stator permanent magnets 5, or the same material as the stator matrix 3 is filled between the adjacent second stator permanent magnets 5, the magnetic pole polarity of the inner wall of the second stator permanent magnets 5 is the same as the magnetic pole polarity of the outer wall of the rotor permanent magnet 2 opposite to the second stator permanent magnets, and the plurality of rotor permanent magnets 2 and the corresponding second stator permanent magnets 5 form a repulsive magnetic circuit. The rotor base 1 and the stator base 3 are both made of non-magnetic materials, which do not affect the magnetic fields of the rotor permanent magnet 2, the first stator permanent magnet 4 and the second stator permanent magnet 5.
When the radial permanent magnet suspension bearing is applied, the inner wall of the rotor matrix 1 is fixed with a horizontal rotating shaft 6, and the rotor matrix is driven by the rotating shaft 6 to synchronously rotate with the rotating shaft 6. The stress condition of the rotating shaft is as follows: the downward force includes the weight of the rotor base 1 + the weight of the rotor permanent magnet 2 + the weight of the rotating shaft 6 + the load weight = G, the load being a component fixed to the rotating shaft 6. The upward force is heteropolar attractive force Fsuction generated by the first stator permanent magnet 4 on a pull-push magnetic circuit formed by the rotor permanent magnets 2 and homopolar repulsive force Frepulsion generated by the second stator permanent magnet 5 on a repulsive magnetic circuit formed by the rotor permanent magnets 2, wherein Fsuction+Frepulsion=G, and the two upward forces greatly increase levitation force and stability rigidity. When the rotation shaft 6 is subjected to a downward external force to move downward, the F-repulsion increase prevents the rotation shaft 6 from continuing to move downward, and when the rotation shaft is subjected to an upward external force, the F-repulsion decrease prevents the rotation shaft from continuing to move upward. According to the radial permanent magnet suspension bearing, the F absorption generated by the first stator permanent magnet 4 on the rotor permanent magnet 2 and the F repulsion generated by the second stator permanent magnet 5 on the rotor permanent magnet 2 are combined, so that the load born by the bearing and the external force in the axial downward direction can be obviously improved. The first stator permanent magnet 4 and the second stator permanent magnet 5 of the radial permanent magnet suspension bearing of the invention are symmetrical in axial cross section through the same axis of the stator base body 3. When the permanent magnet suspension bearing of the invention is mounted on a horizontal rotating shaft 6, the first stator permanent magnet 4 is located above the second stator permanent magnet 5, and the above-mentioned axial cross section is now a plane perpendicular to the horizontal plane. Under the action of the gravity of the rotor matrix, the gravity of the rotor permanent magnet, the gravity of the rotating shaft and the load (without other external force), the axis of the rotor permanent magnet, the axis of the rotating shaft and the axis of the stator matrix are coincident, namely the rotor permanent magnet is positioned at the center of the stator matrix, and at the moment, a radial gap d is formed between the first stator permanent magnet 4 and the rotor permanent magnet 2.
As shown in fig. 1, the first stator permanent magnet 4, the second stator permanent magnet 5 and the rotor permanent magnet 2 have the same size in the axial direction, and a plurality of the first stator permanent magnets 4 and a plurality of the rotor permanent magnets 2 may be aligned in one-to-one correspondence in the axial direction, and a plurality of the second stator permanent magnets 5 and a plurality of the rotor permanent magnets 2 may be aligned in one-to-one correspondence in the axial direction, so that the rotor permanent magnets 2 are in the most stable state with respect to the first stator permanent magnets 4 and the second stator permanent magnets 5.
As shown in fig. 2, the second stator permanent magnet 5 has a larger dimension in its radial direction than the first permanent magnet, which makes the magnetic energy generated by the first stator permanent magnet 4 and the second stator permanent magnet 5 larger as the volumes are the same when the materials are the same. As shown in fig. 2, the inner diameter of the first stator permanent magnet 4 is larger than the inner diameter of the second stator permanent magnet 5, so that the second stator permanent magnet 5 is closer to the rotor permanent magnet 2, and the acting force on the rotor permanent magnet 2 is larger, so that the radial downward load and external force which can be borne by the rotor are larger, and the rotor is more stable in the up-down direction.
In another embodiment, as shown in fig. 3 and 4, the second stator permanent magnet 5 has a larger dimension in its radial direction than the first stator permanent magnet 4, while the first stator permanent magnet 4 has an inner diameter equal to the inner diameter of the second stator permanent magnet 5, and the first stator permanent magnet 4 has an outer diameter larger than the outer diameter of the second stator permanent magnet 5, and at this time, it is required that the inner diameter of the portion of the stator base 3 opposite to the second stator permanent magnet 5 is larger than the inner diameter of the portion of the stator base 3 opposite to the first stator permanent magnet 4.
The product of B and H at any point on the demagnetization curve is called the magnetic energy product, and the maximum value of the product of B and H is called the maximum magnetic energy product, which is the point D on the demagnetization curve. The maximum magnetic energy product is one of the important parameters for measuring the amount of energy stored in the magnet. Preferably, the maximum magnetic energy product of the second stator permanent magnet 5 is 1.2 or more than the maximum magnetic energy product of the first stator permanent magnet 4. When the permanent magnet suspension bearing of the present invention is mounted on the horizontal rotating shaft 6, the second stator permanent magnet 5 can provide a larger repulsive force so as to withstand a larger radially downward load and external force. In this embodiment, the second stator permanent magnet 5 is a 45SH neodymium-iron-boron magnet, and the first stator permanent magnet 4 is a 35SH neodymium-iron-boron magnet. Whether the volume of the second stator permanent magnet 5 is increased, the second stator permanent magnet 5 is closer to the rotor permanent magnet 2, and the second permanent magnet is made of a material with a higher maximum magnetic energy product, the three measures can be selected from one or two or three of combination to make the second stator permanent magnet 5 bear larger radial downward load and external force.
As a preferable scheme, the central angle of the first stator permanent magnet 4 is 115-130 degrees, the central angle of the second stator permanent magnet 5 is 195-205 degrees, the end part of the first stator permanent magnet 4 is not contacted with the end part of the second stator permanent magnet 5, and the magnetic fields of the two permanent magnets are kept from influencing each other. When the permanent magnet suspension bearing is mounted on a horizontal rotating shaft 6, the first stator permanent magnet 4 is on the upper side, the second stator permanent magnet 5 is on the lower side, the axial section is a plane vertical to the horizontal plane, and two ends of the second stator permanent magnet 5 extend to the upper side of the horizontal plane passing through the axis. The characteristic about the central angle is combined with one or two or three of the three measures of "increasing the volume of the second stator permanent magnet 5, bringing the second stator permanent magnet 5 closer to the rotor permanent magnet 2, and bringing the second permanent magnet into a material having a higher maximum magnetic energy product", when the rotation shaft 6 is biased in the horizontal direction by an external force in the horizontal direction, the repulsive force of the second stator permanent magnet 5 against the rotor permanent magnet 2 in the direction opposite to the external force can be greater, and further bias of the rotation shaft 6 can be more easily prevented, so that the rotor permanent magnet 2 can obtain greater stability in the horizontal direction. In this embodiment, the central angle of the second stator permanent magnet 5 is 200 °, and the central angle of the first stator permanent magnet 4 is 130 °.
The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, the scope of which is defined by the claims. Various modifications and equivalent substitutions of the invention will occur to those skilled in the art, which are within the spirit and scope of the invention.
Claims (6)
1. The radial permanent magnet suspension bearing is characterized by comprising an annular rotor matrix and at least three annular rotor permanent magnets which are sleeved outside the rotor matrix and are tightly attached between the adjacent axial directions, the magnetic poles of the outer circumferences of the adjacent rotor permanent magnets are opposite, the radial permanent magnet suspension bearing also comprises an annular stator matrix, a plurality of first stator permanent magnets and a plurality of second stator permanent magnets which are arranged on the inner wall of the stator matrix in a surrounding mode, the number and the attaching mode of the two types of the first stator permanent magnets and the rotor permanent magnets are the same, the axial sizes of the two types of the magnets are the same, the axial sizes of the second stator permanent magnets are smaller than the axial sizes of the rotor permanent magnets, the first stator permanent magnets and the second stator permanent magnets are positioned on the same annular body and are symmetrical relative to the same vertical section passing through the axis of the stator matrix, the vertical section is vertical to the horizontal plane, the first stator permanent magnets are positioned on the upper part of the annular body, the second stator permanent magnets are positioned on the lower part of the annular body, the second stator central angle is larger than or equal to 195 DEG, the radial sizes of the second stator permanent magnets are larger than the radial sizes of the first stator permanent magnets, the second stator permanent magnets are larger than the magnetic energy of the first stator permanent magnets and the magnetic poles are opposite to the magnetic poles of the first stator permanent magnets, the magnetic poles are opposite to the magnetic poles of the first stator permanent magnets are arranged on the inner wall of the rotor and the magnetic poles of the permanent magnets are opposite to the magnetic poles of the first stator permanent magnets; the plurality of second stator permanent magnets and the plurality of rotor permanent magnets are arranged in one-to-one correspondence in the axial direction, the second stator permanent magnets are arranged in the center relative to the rotor permanent magnets corresponding to the second stator permanent magnets in the axial direction, the magnetic pole polarity of the inner wall of the second stator permanent magnets is the same as the magnetic pole polarity of the outer wall of the rotor permanent magnets corresponding to the second stator permanent magnets, and the plurality of rotor permanent magnets and the second stator permanent magnets corresponding to the rotor permanent magnets form a repulsive magnetic circuit.
2. The radial permanent magnet suspension bearing of claim 1 wherein an inner diameter of said first stator permanent magnet is greater than an inner diameter of said second stator permanent magnet.
3. The radial permanent magnet suspension bearing of claim 1 wherein the maximum magnetic energy product of the second stator permanent magnet is 1.2 and above the maximum magnetic energy product of the first stator permanent magnet.
4. The radial permanent magnet suspension bearing of claim 1 wherein the second stator permanent magnet is a 45SH neodymium-iron-boron magnet and the first stator permanent magnet is a 35SH neodymium-iron-boron magnet.
5. Radial permanent magnet suspension bearing according to any of claims 1-4, characterized in that the central angle of the first stator permanent magnet is 115 ° -130 °, and the central angle of the second stator permanent magnet is 195 ° -205 °.
6. The radial permanent magnet suspension bearing of claim 5 wherein said second stator permanent magnet has a central angle of 200 ° and said first stator permanent magnet has a central angle of 130 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210338204.0A CN114607704B (en) | 2022-04-01 | 2022-04-01 | Radial permanent magnet suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210338204.0A CN114607704B (en) | 2022-04-01 | 2022-04-01 | Radial permanent magnet suspension bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114607704A CN114607704A (en) | 2022-06-10 |
| CN114607704B true CN114607704B (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210338204.0A Active CN114607704B (en) | 2022-04-01 | 2022-04-01 | Radial permanent magnet suspension bearing |
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| CN (1) | CN114607704B (en) |
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| CN110748562A (en) * | 2019-09-17 | 2020-02-04 | 南京航空航天大学 | Surrounding permanent magnet biased axial-radial magnetic suspension bearing |
| CN111434939A (en) * | 2019-01-14 | 2020-07-21 | 北京精雕科技集团有限公司 | Low-power-consumption large-bearing-capacity three-phase permanent magnet biased radial magnetic suspension bearing |
| WO2021208278A1 (en) * | 2020-04-17 | 2021-10-21 | 北京航空航天大学宁波创新研究院 | Active and passive magnetic suspension bearing |
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| WO2021208278A1 (en) * | 2020-04-17 | 2021-10-21 | 北京航空航天大学宁波创新研究院 | Active and passive magnetic suspension bearing |
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| Publication number | Publication date |
|---|---|
| CN114607704A (en) | 2022-06-10 |
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