CN112112896B - Magnetic axial bearing - Google Patents
Magnetic axial bearing Download PDFInfo
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- CN112112896B CN112112896B CN202010949033.6A CN202010949033A CN112112896B CN 112112896 B CN112112896 B CN 112112896B CN 202010949033 A CN202010949033 A CN 202010949033A CN 112112896 B CN112112896 B CN 112112896B
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- magnetic
- magnetic pole
- ring
- axial bearing
- sliding
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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
- F16C32/044—Active magnetic bearings
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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
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0476—Active magnetic bearings for rotary movement with active support of one degree of freedom, e.g. axial magnetic bearings
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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
- F16C37/00—Cooling of bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a magnetic axial bearing, relating to the technical field of magnetic bearings and comprising a bearing outer ring and a magnetic pole, the inner side surface of the bearing outer ring is fixedly connected with a stator inner ring, the inner side surface of the stator inner ring is fixedly connected with four limiting cylinders which are distributed at equal intervals, magnetic poles are arranged in the four limiting cylinders, sliding grooves are formed in the inner side surfaces of the other two opposite side walls of the limiting cylinders, sliding blocks are fixedly connected to the two opposite inner side surfaces of the magnetic poles, and a heat-shrinkable material is arranged in the sliding grooves, and a sliding block made of thermal expansion material, the thermal contraction material in the sliding chute is contracted by utilizing the heat generated by the magnetic axial bearing during working, the sliding block is expanded, therefore, the slide block is connected in the sliding groove more tightly, and the magnetic pole is prevented from influencing the normal work of the magnetic axial bearing due to the overlarge offset of the magnetic axial bearing caused by vibration.
Description
Technical Field
The invention relates to the technical field of magnetic bearings, in particular to a magnetic axial bearing.
Background
The magnetic bearing is a supporting form for supporting a load or a suspension rotor by magnetic field force, and in recent years, the bearing is developed rapidly, particularly applied to high-speed, low-friction, high (low) temperature and vacuum environments, and compared with other supporting forms, the magnetic bearing has unique superiority and very development prospect.
Current magnetic bearing relies on magnetic pole and coil to support the rotor basically, and magnetic bearing on the present market can't change magnetic pole and coil for under the long-time in service behavior of magnetic pole and coil, can lead to that magnetic bearing is whole to the magnetic support of rotor can descend, influences magnetic bearing's result of use.
For this purpose, a magnetic axial bearing is proposed.
Disclosure of Invention
The invention aims to provide a magnetic axial bearing, which can take out a magnetic pole by unscrewing a second screw, is convenient to replace the magnetic pole and a coil, and avoids the weakening of magnetic support of the device caused by long-term use of the magnetic pole and the coil, so that the device can stably work for a long time, and the problems in the background art are solved.
In order to achieve the purpose, the invention provides the following technical scheme:
a magnetic axial bearing comprises a bearing outer ring and a magnetic pole, wherein the inner side surface of the bearing outer ring is fixedly connected with a stator inner ring, the inner side surface of the stator inner ring is fixedly connected with four limiting cylinders which are distributed at equal intervals, and the four limiting cylinders are all provided with magnetic poles, two opposite side walls of the limiting cylinders are both provided with two second threaded holes, and the inner side surfaces of the other two opposite side walls of the limiting cylinder are both provided with a sliding chute, the two opposite inner side surfaces of the magnetic pole are both fixedly connected with a sliding block, and the other two opposite inner side surfaces of the magnetic pole are both provided with other second threaded holes, and the sliding block is connected with the sliding chute in a sliding way, the magnetic pole is fixedly connected with the limiting cylinder through a second screw, a coil is arranged on the magnetic pole, the rotor is positioned at the center of the four magnetic poles, and the rotor is positioned at the center of the bearing outer ring, and two opposite side surfaces of the bearing outer ring are fixedly connected with dustproof mechanisms.
Preferably, the second threaded hole of the magnetic pole corresponds to the second threaded hole of the sliding chute.
Preferably, a plurality of circular holes distributed at equal intervals are formed in the bearing outer ring.
Preferably, two opposite side surfaces of the bearing outer ring are provided with a plurality of first threaded holes which are distributed at equal intervals.
Preferably, the dustproof mechanism comprises a first screw, a dustproof ring and a through hole, the through hole is formed in the center of the dustproof ring, the diameter of the through hole is larger than that of the rotor, a plurality of first threaded holes distributed at equal intervals are formed in the dustproof ring, and the dustproof ring is fixedly connected to the side face of the bearing outer ring through the first screw.
Preferably, the side face of the dustproof ring is fixedly connected with a rubber ring, and the dustproof ring is in contact with the bearing outer ring.
Preferably, the first screw on the dust ring corresponds to the first screw on the bearing outer ring.
Preferably, the inside of the sliding groove is filled and fixed with a heat-shrinkable material; the sliding block is made of thermal expansion materials;
preferably, the length of the magnetic pole is smaller than that of the limiting cylinder, a heat dissipation hole is formed in one surface, provided with the sliding groove, of the limiting cylinder, a limiting block is arranged below the sliding groove, and a stop block is arranged below the sliding block; after the magnetic pole enters the limiting cylinder, the stop block plugs the heat dissipation hole; the stop block is made of a heat-shrinkable material.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the magnetic axial bearing, the rotor is supported by magnetic force, the rotating efficiency is higher, when the magnetic pole is installed, the sliding block is aligned to the sliding groove, the magnetic pole slides into the limiting cylinder, when the magnetic pole slides to the bottom of the limiting cylinder, the magnetic pole corresponds to the second threaded hole in the sliding groove, the magnetic pole can be fixed through the second screw, the magnetic pole can be taken out by screwing the second screw down, the magnetic pole and the coil can be conveniently replaced, the phenomenon that the magnetic support of the magnetic axial bearing is weakened due to long-term use of the magnetic pole and the coil is avoided, the magnetic axial bearing can stably work for a long time, and meanwhile the replaced magnetic pole and the replaced coil can be recycled.
2. According to the magnetic axial bearing, the thermal shrinkage material in the sliding groove is contracted and the sliding block is expanded by arranging the thermal shrinkage material in the sliding groove and adopting the sliding block made of the thermal expansion material, so that the sliding block is more tightly connected in the sliding groove by utilizing heat generated by the magnetic axial bearing during working, the influence on the normal work of the magnetic axial bearing due to overlarge offset of a magnetic pole caused by vibration of the magnetic axial bearing is prevented, and the fastening effect of the magnetic pole in the limiting cylinder can be further improved by mutually matching the magnetic axial bearing with the first threaded hole, the second threaded hole and the second screw, and the influence on the normal work of the magnetic axial bearing due to overlarge offset of the magnetic pole caused by vibration of the magnetic axial bearing is prevented.
3. According to the magnetic axial bearing, the stop block is arranged, when the magnetic axial bearing does not work or just works, certain dust can be prevented from entering the limiting cylinder to influence the normal work of the magnetic pole, meanwhile, after the magnetic axial bearing works for a period of time to generate heat, the stop block shrinks and does not seal the heat dissipation holes, the heat dissipation holes of the two sliding grooves are opened, wind generated in the magnetic axial bearing during rotation penetrates through the two heat dissipation holes, the magnetic pole is cooled, and the magnetic pole is prevented from being burnt due to overhigh temperature.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded view of the magnetic pole and chute assembly of the present invention;
FIG. 3 is an enlarged schematic view of FIG. 1 at A;
FIG. 4 is a schematic structural view of a slider and a stopper according to the present invention;
in the figure: bearing outer ring 1, round hole 2, first screw hole 3, stator inner circle 4, rotor 5, first screw 6, dust ring 7, rubber circle 8, through-hole 9, spacing section of thick bamboo 10, magnetic pole 11, spout 12, slider 13, louvre 131, stopper 132, dog 133, coil 14, second screw hole 15, second screw 16.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, the present invention provides a technical solution: a magnetic axial bearing comprises a bearing outer ring 1 and magnetic poles 11, wherein a stator inner ring 4 is fixedly connected with the inner side surface of the bearing outer ring 1, four limit cylinders 10 distributed at equal intervals are fixedly connected with the inner side surface of the stator inner ring 4, the magnetic poles 11 are installed in the four limit cylinders 10, two opposite side walls of each limit cylinder 10 are respectively provided with two second threaded holes 15, the inner side surfaces of the other two opposite side walls of each limit cylinder 10 are respectively provided with a chute 12, two opposite inner side surfaces of each magnetic pole 11 are respectively and fixedly connected with a sliding block 13, the other two opposite inner side surfaces of each magnetic pole 11 are respectively provided with another second threaded hole 15, the sliding blocks 13 are in sliding connection with the chutes 12, the magnetic poles 11 are fixedly connected with the limit cylinders 10 through second screws 16, the magnetic poles 11 are provided with coils 14, a rotor 5 is positioned at the center corresponding to the four magnetic poles 11, and the rotor 5 is positioned at the center of the bearing outer ring 1, two opposite side surfaces of the bearing outer ring 1 are fixedly connected with dustproof mechanisms.
Through adopting above-mentioned technical scheme, rotor 5 supports through magnetic force in this device, rotation efficiency is higher, when installation magnetic pole 11, aim at spout 12 with slider 13, make magnetic pole 11 slide in spacing section of thick bamboo 10, when magnetic pole 11 slides the bottom of spacing section of thick bamboo 10, second screw hole 15 on magnetic pole 11 and the spout 12 is corresponding, this moment through second screw 16 alright fix magnetic pole 11, with second screw 16 back-out alright take out magnetic pole 11, conveniently change magnetic pole 11 and coil 14, it weakens to avoid magnetic pole 11 and coil 14 to use the magnetic force support that leads to this device for a long time, make this device can long-time steady operation, can recycle to magnetic pole 11 and coil 14 that get off simultaneously.
In an embodiment of the present invention, the second threaded hole 15 of the magnetic pole 11 corresponds to the second threaded hole 15 of the sliding chute 12.
By adopting the above technical solution, the second threaded hole 15 is used for fixing the magnetic pole 11.
As a specific embodiment of the present invention, a plurality of circular holes 2 are formed in the bearing outer ring 1 and are distributed at equal intervals.
Through adopting above-mentioned technical scheme, the weight of bearing inner race 1 can be alleviateed to round hole 2.
In an embodiment of the present invention, two opposite side surfaces of the bearing outer ring 1 are provided with a plurality of first threaded holes 3 distributed at equal intervals.
Through adopting above-mentioned technical scheme, first screw hole 3 is used for the fixed to dustproof mechanism.
As a specific embodiment of the present invention, the dust-proof mechanism includes a first screw 6, a dust-proof ring 7 and a through hole 9, the through hole 9 is opened at the center of the dust-proof ring 7, the diameter of the through hole 9 is greater than the diameter of the rotor 5, a plurality of first threaded holes 3 are also opened on the dust-proof ring 7, and the dust-proof ring 7 is fixedly connected to the side surface of the bearing outer ring 1 through the first screw 6.
Through adopting above-mentioned technical scheme, during dust ring 7 can reduce the dust and get into bearing inner race 1, through-hole 9 can be so that the pivot normal rotation of connecting rotor 5.
In a specific embodiment of the present invention, a rubber ring 8 is fixedly connected to a side surface of the dust-proof ring 7, and the dust-proof ring 7 is in contact with the bearing outer ring 1.
Through adopting above-mentioned technical scheme, rubber circle 8 plays sealed effect.
As an embodiment of the present invention, the first screw 6 on the dust-proof ring 7 corresponds to the first screw 6 on the bearing outer ring 1.
By adopting the technical scheme, the first screw 6 is used for fixing the dustproof ring 7 on the bearing outer ring 1.
As a specific embodiment of the present invention, the inside of the chute 12 is filled and fixed with a heat-shrinkable material; the sliding block 13 is made of a thermal expansion material;
because the magnetic axial bearing can generate vibration during working, the invention utilizes the heat generated by the magnetic axial bearing by arranging the thermal shrinkage material in the chute 12 and the sliding block 13 made of the thermal expansion material to shrink the thermal shrinkage material in the chute 12 and expand the sliding block 13, thereby enabling the sliding block 13 to be more tightly connected in the chute 12, preventing the magnetic pole 11 from influencing the normal working of the magnetic axial bearing due to overlarge offset generated by the vibration of the magnetic axial bearing, and further improving the fastening action of the magnetic pole 11 in the limiting cylinder 10 by matching with the first threaded hole 3, the second threaded hole 15 and the second screw 16, preventing the magnetic pole 11 from influencing the normal working of the magnetic axial bearing due to overlarge offset generated by the vibration of the magnetic axial bearing, and regarding the thermal shrinkage material used in the chute 12, the thermal expansion material used in the slider 13 is the same as the thermal expansion material used in the prior art, and the thermal expansion material used in the slider is the same as the thermal expansion material used in the prior art, as long as the thermal expansion function is achieved, such as a thermal expansion material of memory alloy.
As a specific embodiment of the present invention, the length of the magnetic pole 11 is smaller than the length of the limiting cylinder 10, and the heat dissipation hole 131 is disposed on the surface of the limiting cylinder 10, where the sliding slot 12 is disposed, the limiting block 132 is disposed below the sliding slot 12, and the stop block 133 is disposed below the sliding block 13; after the magnetic pole 11 enters the limiting cylinder 10, the stop block 133 plugs the heat dissipation hole 131; the stopper 133 is made of a heat-shrinkable material;
after the magnetic pole 11 enters the limiting cylinder 10, because the length of the magnetic pole 11 is smaller than that of the limiting cylinder 10, a certain distance exists between the bottom of the magnetic pole 11 and the bottom of the limiting cylinder 10, the distance can be controlled to be 1-2 cm, the stop block 133 entering the limiting cylinder 10 seals the heat dissipation holes 131 at the moment, when the magnetic axial bearing does not work or just works, certain dust can be prevented from entering the limiting cylinder 10, the normal work of the magnetic pole 11 is influenced, meanwhile, after the magnetic axial bearing works for a period of time to generate heat, the stop block 133 shrinks and does not seal the heat dissipation holes 131, the heat dissipation holes 131 of the two sliding grooves 12 are opened, wind generated in the magnetic axial bearing during rotation penetrates through the two heat dissipation holes 131, the magnetic pole 11 is dissipated, and the magnetic pole 11 is prevented from being burnt due to overhigh temperature.
The working principle is as follows: in the invention, the rotor 5 is supported by magnetic force, the rotation efficiency is higher, when the magnetic pole 11 is installed, the slide block 13 is aligned to the chute 12, so that the magnetic pole 11 slides into the limiting cylinder 10, when the magnetic pole 11 slides to the bottom of the limiting cylinder 10, the magnetic pole 11 corresponds to the second threaded hole 15 on the chute 12, at the moment, the magnetic pole 11 can be fixed by the second screw 16, the magnetic pole 11 can be taken out by unscrewing the second screw 16, the magnetic pole 11 and the coil 14 are convenient to replace, the magnetic support of the device is prevented from weakening due to the long-term use of the magnetic pole 11 and the coil 14, the device can stably work for a long time, and the replaced magnetic pole 11 and the coil 14 can be recycled;
because the magnetic axial bearing can vibrate during operation, the thermal shrinkage material in the chute 12 is shrunk by the heat generated during the operation of the magnetic axial bearing, and the slider 13 is expanded by the heat generated during the operation of the magnetic axial bearing, so that the slider 13 is more tightly connected in the chute 12, the magnetic pole 11 is prevented from influencing the normal operation of the magnetic axial bearing due to overlarge offset caused by the vibration of the magnetic axial bearing, and the magnetic pole 11 can be further improved in the fastening effect in the limiting cylinder 10 by being matched with the first threaded hole 3, the second threaded hole 15 and the second screw 16, and the magnetic pole 11 is prevented from influencing the normal operation of the magnetic axial bearing due to the overlarge offset caused by the vibration of the magnetic axial bearing;
after the magnetic pole 11 enters the limiting cylinder 10, because the length of the magnetic pole 11 is smaller than that of the limiting cylinder 10, a certain distance is reserved between the bottom of the magnetic pole 11 and the bottom of the limiting cylinder 10, the distance can be controlled to be 1-2 cm, the stop block 133 entering the limiting cylinder 10 seals the heat dissipation holes 131 at the moment, when the magnetic axial bearing does not work or just works, certain dust can be prevented from entering the limiting cylinder 10 to affect the normal work of the magnetic pole 11, meanwhile, after the magnetic axial bearing works for a period of time to generate heat, the stop block 133 shrinks and does not seal the heat dissipation holes 131, the heat dissipation holes 131 of the two sliding grooves 12 are opened, wind generated in the magnetic axial bearing during rotation penetrates through the two heat dissipation holes 131, the magnetic pole 11 is dissipated, and the magnetic pole 11 is prevented from being burnt due to overhigh temperature.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A magnetic axial bearing, includes bearing inner race (1) and magnetic pole (11), its characterized in that: the inner side surface of the bearing outer ring (1) is fixedly connected with a stator inner ring (4), the inner side surface of the stator inner ring (4) is fixedly connected with four limit cylinders (10) which are distributed at equal intervals, magnetic poles (11) are all installed in the four limit cylinders (10), two opposite side walls of each limit cylinder (10) are respectively provided with two second threaded holes (15), the inner side surfaces of the other two opposite side walls of each limit cylinder (10) are respectively provided with a sliding groove (12), two opposite inner side surfaces of each magnetic pole (11) are respectively and fixedly connected with a sliding block (13), the other two opposite inner side surfaces of each magnetic pole (11) are respectively provided with another second threaded hole (15), the sliding blocks (13) are connected with the sliding grooves (12) in a sliding manner, the magnetic poles (11) are fixedly connected with the limit cylinders (10) through second screws (16), coils (14) are arranged on the magnetic poles (11), and the rotor (5) is positioned at the centers corresponding to the four magnetic poles (11), the rotor (5) is positioned at the center of the bearing outer ring (1), and two opposite side surfaces of the bearing outer ring (1) are fixedly connected with a dustproof mechanism;
the length of the magnetic pole (11) is smaller than that of the limiting cylinder (10), a radiating hole (131) is formed in one surface, provided with the sliding groove (12), of the limiting cylinder (10), a limiting block (132) is arranged below the sliding groove (12), and a stop block (133) is arranged below the sliding block (13); after the magnetic pole (11) enters the limiting cylinder (10), the stop block (133) plugs the heat dissipation hole (131); the stop block (133) is made of a heat shrinkable material.
2. A magnetic axial bearing according to claim 1, wherein: and the second threaded hole (15) of the magnetic pole (11) corresponds to the second threaded hole (15) on the sliding chute (12).
3. A magnetic axial bearing according to claim 1, wherein: a plurality of circular holes (2) distributed at equal intervals are formed in the bearing outer ring (1).
4. A magnetic axial bearing according to claim 1, wherein: two opposite side surfaces of the bearing outer ring (1) are provided with a plurality of first threaded holes (3) distributed at equal intervals.
5. A magnetic axial bearing according to claim 1, wherein: dustproof mechanism includes first screw (6), dust ring (7) and through-hole (9), and the center department of dust ring (7) has seted up through-hole (9), and the diameter of through-hole (9) is greater than the diameter of rotor (5), and sets up the first screw hole (3) that a plurality of equidistance distribute on dust ring (7) equally, and dust ring (7) are through first screw (6) fixed connection on the side of bearing inner race (1).
6. A magnetic axial bearing according to claim 5, wherein: the side face of the dustproof ring (7) is fixedly connected with a rubber ring (8), and the dustproof ring (7) is in contact with the bearing outer ring (1).
7. A magnetic axial bearing according to claim 5, wherein: and a first screw (6) on the dustproof ring (7) corresponds to a first screw (6) on the bearing outer ring (1).
8. A magnetic axial bearing according to claim 1, wherein: the inside of the sliding groove (12) is filled and fixed with a heat-shrinkable material; the sliding block (13) is made of thermal expansion materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010949033.6A CN112112896B (en) | 2020-09-10 | 2020-09-10 | Magnetic axial bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010949033.6A CN112112896B (en) | 2020-09-10 | 2020-09-10 | Magnetic axial bearing |
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| CN112112896A CN112112896A (en) | 2020-12-22 |
| CN112112896B true CN112112896B (en) | 2022-05-31 |
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| CN202010949033.6A Active CN112112896B (en) | 2020-09-10 | 2020-09-10 | Magnetic axial bearing |
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| JP3791492B2 (en) * | 2002-12-25 | 2006-06-28 | 株式会社日立製作所 | Rotating electric machine, electric vehicle, and resin insert molding method |
| DE502007004562D1 (en) * | 2007-06-28 | 2010-09-09 | Siemens Ag | Shaft seal for a turbomachine |
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Effective date of registration: 20220513 Address after: 252600 Yandian Industrial Park, Linqing City, Liaocheng City, Shandong Province Applicant after: SHANDONG BOTE BEARING Co.,Ltd. Address before: 241000 424, 4th floor, electronic industrial park, Jiujiang Economic Development Zone, Jiujiang District, Wuhu City, Anhui Province Applicant before: Wuhu Xincong Industrial Design Co.,Ltd. |
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