CN220523086U - Passive magnetic-air hybrid bearing structure - Google Patents
Passive magnetic-air hybrid bearing structure Download PDFInfo
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- CN220523086U CN220523086U CN202321464618.4U CN202321464618U CN220523086U CN 220523086 U CN220523086 U CN 220523086U CN 202321464618 U CN202321464618 U CN 202321464618U CN 220523086 U CN220523086 U CN 220523086U
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- permanent magnet
- rotor
- permanent magnets
- permanent
- assembly
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- 239000011888 foil Substances 0.000 claims abstract description 47
- 230000001681 protective effect Effects 0.000 claims abstract description 18
- 238000006073 displacement reaction Methods 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 15
- 239000004020 conductor Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
Landscapes
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The utility model relates to a passive magnetic and air hybrid bearing structure, which comprises a permanent magnet, a bearing seat and a rotor, wherein two permanent magnets with opposite poles are fixedly connected on the rotor to form a permanent magnet rotor assembly, and the outer sides of the two permanent magnets are provided with protective sleeves; the permanent magnet stator assembly is formed by radially fixing two permanent magnets with opposite poles in the bearing seat, a flat foil and a wave-shaped foil are arranged on inner hole walls of the two permanent magnets in the permanent magnet stator assembly, the permanent magnet rotor assembly and the permanent magnets in the permanent magnet stator assembly repel each other, separation of the rotor and the stator is realized through repulsive force, the permanent magnets are fixedly connected to the inner bottom surface of the bearing seat, and the permanent magnets are homopolar opposite to the corresponding permanent magnets on the rotor and are used for preventing the axial displacement of the rotor from being overlarge through repulsive force. The passive magnetic hybrid bearing structure does not need a control system, reduces the cost of the bearing and is convenient to maintain.
Description
Technical Field
The utility model belongs to the technical field of bearings, and particularly relates to a passive magnetic-air hybrid bearing structure.
Background
Compared with the traditional bearing, the dynamic pressure bearing with the elastic foil gas as a lubricating medium has the advantages of low noise, no pollution, high stability, high allowable rotation speed, good rotation precision and the like, and is increasingly widely applied to high-speed rotating machinery; however, the gas bearing can lead to severe abrasion of foil and journal during starting and stopping, and the service life of the bearing is affected; in addition, conventional gas bearings are not self-adaptive and the outside of the foil is subject to wear.
The existing magnetic bearings mostly adopt active magnetic bearings which can support a high-speed rotor and have the characteristics of long service life, non-contact, small friction and the like, but a complex control system is needed; and the passive magnetic bearing generates attraction force or repulsive force by the permanent magnet, so that a control system is not required, and the cost and development difficulty are reduced.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a passive magnetic hybrid bearing structure which combines the advantages of a gas bearing and a passive magnetic bearing and has the characteristics of simple structure, no need of control and strong self-adaptability.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a passive magnetic hybrid bearing structure comprises a permanent magnet, a bearing seat and a rotor, wherein two permanent magnets with opposite poles are fixedly connected to the rotor to form a permanent magnet rotor assembly, and a protective sleeve is arranged on the outer sides of the two permanent magnets; the permanent magnet stator assembly is formed by radially fixing two permanent magnets with opposite poles in the bearing seat, a flat foil and a wave-shaped foil are arranged on inner hole walls of the two permanent magnets in the permanent magnet stator assembly, the permanent magnet rotor assembly and the permanent magnets in the permanent magnet stator assembly repel each other, separation of the rotor and the stator is realized through repulsive force, the permanent magnets are fixedly connected to the inner bottom surface of the bearing seat, and the permanent magnets are homopolar opposite to the corresponding permanent magnets on the rotor and are used for preventing the axial displacement of the rotor from being overlarge through repulsive force.
Furthermore, the rotor is made of non-magnetic conductive materials, the end part of the rotor is provided with a spherical boss, the spherical boss is connected with a concave spherical surface of a bolt for fixing the permanent magnet on the inner bottom surface of the bearing seat in a matched manner, and the surfaces of the spherical surface and the boss are coated with wear-resistant coatings.
Furthermore, the outer sides of the two permanent magnets and the protective sleeve in the permanent magnet rotor assembly are in an outer arc shape, the protective sleeve is in interference connection with the permanent magnets, and the protective sleeve is made of wear-resistant metal materials.
Further, the inner sides of the two permanent magnets, the flat foil and the wave foil in the permanent magnet stator assembly are in an inner circular arc shape; the arc radian is the same, and the arc radian is matched with the outer arc shapes of the two permanent magnets and the protective sleeve in the permanent magnet rotor assembly, so that the bearing and the rotor have certain self-adaptability to the inclination of the rotor in the running process.
Further, two permanent magnets in the permanent magnet rotor assembly are connected through bolts of magnetic conduction materials, and the permanent magnets are connected to the rotor through bolts of the magnetic conduction materials.
Further, the outer end face of the permanent magnet in the permanent magnet rotor assembly is fixedly connected with a cover plate for protecting the permanent magnet through bolts made of magnetic conductive materials; the cover plate is made of a non-magnetic conductive material.
Further, two permanent magnets in the permanent magnet stator assembly are connected by bolts of magnetic conduction materials, and the permanent magnets and the bearing seat are also connected by bolts of the magnetic conduction materials.
Furthermore, the flat foil and the wave-shaped foil are arranged in the corresponding clamping grooves on the permanent magnet through the clamping grooves, and the flat foil and the wave-shaped foil are all made of non-magnetic conductive materials.
The beneficial effects of the utility model are as follows:
the utility model realizes the separation of the rotor and the stator by using the repulsive force between the permanent magnet I and the permanent magnet II combination and the permanent magnet III and the permanent magnet IV combination, and avoids the abrasion to the flat foil at the moment of starting and stopping the rotor; the permanent magnet type magnetic bearing has simple structure, does not need a control system, reduces the cost of the bearing and is convenient to maintain.
The flat foil and the wave foil are axially processed into a certain radian, and the outer side of the rotating part (comprising a permanent magnet I, a permanent magnet II and two wear-resistant metal non-magnetic conductive material protective sleeves) is axially processed into a corresponding radian, so that the bearing and the rotor have certain self-adaptability to the inclination of the rotor in the running process.
The fifth permanent magnet and the second permanent magnet are arranged on the second bearing cover and repel each other, so that the axial movement of the rotor can be reduced; a spherical boss is processed at the shaft end of the rotor, a concave spherical surface is processed at the top of the second bolt and coated with a wear-resistant coating, so that the rotor can be protected from being damaged under extreme working conditions.
Drawings
FIG. 1 is a schematic diagram of a passive hybrid magnetic bearing structure according to the present utility model;
FIG. 2 is an assembly view of a first permanent magnet and a second permanent magnet of the present utility model;
FIG. 3 is a diagram of the relative positions of the installation of the fourth permanent magnet and the second permanent magnet;
FIG. 4 is a schematic view of a flat foil;
FIG. 5 is a schematic diagram of a corrugated foil;
FIG. 6 is an assembly view of a flat foil, a corrugated foil, a permanent magnet IV;
FIG. 7 is a schematic diagram of an assembly of a first permanent magnet, a second permanent magnet, and a protective sleeve;
fig. 8 is a schematic diagram of an assembly of the bearing seat II, the permanent magnet V and the bolt II.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings.
As shown in FIG. 1, the passive magnetic hybrid bearing structure comprises a permanent magnet IV 1, a permanent magnet III 2, a protective sleeve 3, a permanent magnet IV 4, a rotor 5, a permanent magnet II 6, a bolt IV 7, a bearing seat IV, a bearing seat II 9, a permanent magnet V10, a bolt II 11, a cover plate 12, a flat foil 13 and a wave-shaped foil 14.
The permanent magnet I4 and the permanent magnet II 6 are opposite in opposite polarity, namely N pole pair N pole or S pole pair S pole, as shown in figure 2, and in order to ensure that the connection is reliably achieved through the bolt I7 of the magnetic conductive material; the permanent magnet I4 is connected with the rotor 5 made of non-magnetic material through the bolt connection of the magnetic material, and rotates along with the rotor during operation; because the rotating speed of the rotor is higher, in order to protect the permanent magnet I4 and the permanent magnet II 6, a non-magnetic conductive wear-resistant metal material protective sleeve 3 is arranged on the outer side of the rotor; the cover plate 12 is made of a non-magnetic conductive material and is used for protecting the second permanent magnet 6, and the cover plate 12 is connected with the second permanent magnet 6 by bolts of the magnetic conductive material; the permanent magnet IV 1 and the permanent magnet III 2 are arranged on the bearing seat, the permanent magnet IV 1 and the permanent magnet III 2 are connected by bolts, and the permanent magnet III 2 is connected with the bearing seat I8 by bolts; the permanent magnet IV 1 and the permanent magnet III 2 on the bearing seat I8 and the permanent magnet II 6 and the permanent magnet I4 on the rotor repel each other, as shown in figure 3; the permanent magnet V10 is fixed on the bearing seat II 9 by a magnetic conduction material bolt, is homopolar opposite to the permanent magnet II 6, and prevents the axial displacement of the rotor from being overlarge by repulsive force; driving a second magnetic conduction bolt 11 into the fifth permanent magnet 10, processing the top of the second magnetic conduction bolt into a concave spherical surface, coating a wear-resistant coating on the inner part of the spherical surface, and processing a corresponding spherical boss on the shaft head of the rotor 5; the permanent magnet IV 1 and the permanent magnet III 2 are opposite in opposite poles and attract each other, and are connected by bolts of magnetic conduction materials, and the permanent magnet III 2 is connected with a bearing seat I8 of non-magnetic conduction materials through the magnetic conduction bolts; flat foils 13 and corrugated foils 14 are clamped in the permanent magnet IV 1 and the permanent magnet III 2, wherein the structure of the flat foils 13 is shown in fig. 4, and the structure of the corrugated foils 14 is shown in fig. 5; the assembly of the permanent magnet III 2, the flat foil 13 and the corrugated foil 14 is shown in fig. 6, the flat foil 13 and the corrugated foil 14 are arranged in the corresponding clamping grooves on the permanent magnet III 2 through the clamping grooves, and both foils are made of non-magnetic materials; the permanent magnet IV 1 is also provided with a corresponding notch, and is also provided with a waveform foil and a flat foil which are symmetrical to the permanent magnet III 2, the flat foil 13 and the waveform foil 14.
The flat foil 13 and the wave foil 14 are axially processed into a certain radian, as shown in fig. 4 and 5, the outer side of the rotating part specifically comprises a first permanent magnet 4, a second permanent magnet 6 and two wear-resistant metal non-magnetic conductive material protective sleeves 3, and the corresponding radian is processed in the axial direction, so that the bearing and the rotor have certain self-adaptability to the inclination of the rotor in the running process.
The fifth permanent magnet 10 and the second permanent magnet 6 are arranged on the second bearing cover 9 to repel each other, so that the axial movement of the rotor can be reduced; a spherical boss is processed at the shaft end of the rotor 5, a concave spherical surface is processed at the top of the second bolt 11 and coated with a wear-resistant coating, so that the rotor can be protected from damage under extreme working conditions.
The outer diameters of the first permanent magnet 4 and the second permanent magnet 6 and the protective sleeve are processed into required arcs, and then the two parts are assembled together through small interference, as shown in fig. 7, the assembled assembly is called a part A; the assembly of the second permanent magnet 6 and the protective sleeve is the same as in fig. 7, and the assembled assembly is called a component B.
The permanent magnet III 2, the corrugated foil 14 and the flat foil 13 are mounted together as shown in fig. 6, and the assembled assembly is called a component C as shown in fig. 6; similarly, the assembly of the permanent magnet four 1 and the other group of wave foils and the flat foils into the other assembly is called a component D.
The bearing seat II 9 and the permanent magnet II 10 are connected into a part by bolts made of magnetic conductive materials, and the bolt II 11 is arranged in the middle, so that the assembly is called a part E, and the assembly is shown in fig. 8.
Firstly, connecting a component C with a bearing seat 18 by bolts of magnetic conduction materials, then connecting a component A with a rotor 5 by bolts of magnetic conduction materials, then connecting a component B with a component A by bolts of magnetic conduction materials, then connecting a component D with a component C by bolts of magnetic conduction materials, then installing an upper cover plate 12, and finally installing a component E on a bearing seat I; and (5) finishing assembly.
Claims (8)
1. A passive magnetic hybrid bearing structure, characterized by: the permanent magnet rotor assembly comprises a permanent magnet, a bearing seat and a rotor, wherein two permanent magnets with opposite poles are fixedly connected to the rotor to form the permanent magnet rotor assembly, and a protective sleeve is arranged on the outer sides of the two permanent magnets; the permanent magnet stator assembly is formed by radially fixing two permanent magnets with opposite poles in the bearing seat, a flat foil and a wave-shaped foil are arranged on inner hole walls of the two permanent magnets in the permanent magnet stator assembly, the permanent magnet rotor assembly and the permanent magnets in the permanent magnet stator assembly repel each other, separation of the rotor and the stator is realized through repulsive force, the permanent magnets are fixedly connected to the inner bottom surface of the bearing seat, and the permanent magnets are homopolar opposite to the corresponding permanent magnets on the rotor and are used for preventing the axial displacement of the rotor from being overlarge through repulsive force.
2. The passive magnetic hybrid bearing structure of claim 1, wherein: the rotor is made of non-magnetic conductive materials, the end part of the rotor is provided with a spherical boss, the spherical boss is connected with a concave spherical surface of a bolt for fixing the permanent magnet on the inner bottom surface of the bearing seat in a matched mode, and wear-resistant coatings are coated on the surfaces of the spherical surface and the boss.
3. The passive magnetic hybrid bearing structure of claim 1, wherein: the outer sides of the two permanent magnets and the protective sleeve in the permanent magnet rotor assembly are in an outer arc shape, the protective sleeve is in interference connection with the permanent magnets, and the protective sleeve is made of wear-resistant metal materials.
4. The passive magnetic hybrid bearing structure of claim 1, wherein: the inner sides of the two permanent magnets, the flat foil and the wave foil in the permanent magnet stator assembly are of an inner circular arc shape; the arc radian is the same, and the arc radian is matched with the outer arc shapes of the two permanent magnets and the protective sleeve in the permanent magnet rotor assembly, so that the bearing and the rotor have certain self-adaptability to the inclination of the rotor in the running process.
5. The passive magnetic hybrid bearing structure of claim 1, wherein: two permanent magnets in the permanent magnet rotor assembly are connected through bolts of magnetic conduction materials, and the permanent magnets are connected to the rotor through bolts of the magnetic conduction materials.
6. The passive magnetic hybrid bearing structure of claim 1, wherein: the outer end face of the permanent magnet in the permanent magnet rotor assembly is fixedly connected with a cover plate for protecting the permanent magnet through bolts made of magnetic conductive materials; the cover plate is made of a non-magnetic conductive material.
7. The passive magnetic hybrid bearing structure of claim 1, wherein: two permanent magnets in the permanent magnet stator assembly are connected by bolts of magnetic conduction materials, and the permanent magnets are also connected with the bearing seat by bolts of the magnetic conduction materials.
8. The passive magnetic hybrid bearing structure of claim 1, wherein: the flat foil and the wave foil are arranged in the corresponding clamping grooves on the permanent magnet through the clamping grooves, and are made of non-magnetic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321464618.4U CN220523086U (en) | 2023-06-09 | 2023-06-09 | Passive magnetic-air hybrid bearing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321464618.4U CN220523086U (en) | 2023-06-09 | 2023-06-09 | Passive magnetic-air hybrid bearing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220523086U true CN220523086U (en) | 2024-02-23 |
Family
ID=89938725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321464618.4U Active CN220523086U (en) | 2023-06-09 | 2023-06-09 | Passive magnetic-air hybrid bearing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220523086U (en) |
-
2023
- 2023-06-09 CN CN202321464618.4U patent/CN220523086U/en active Active
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