CN109281938B - Permanent magnet suspension bearing with magnet protection structure - Google Patents
Permanent magnet suspension bearing with magnet protection structure Download PDFInfo
- Publication number
- CN109281938B CN109281938B CN201811461286.8A CN201811461286A CN109281938B CN 109281938 B CN109281938 B CN 109281938B CN 201811461286 A CN201811461286 A CN 201811461286A CN 109281938 B CN109281938 B CN 109281938B
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- Prior art keywords
- bearing
- magnet
- rotor
- permanent magnet
- stator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000725 suspension Substances 0.000 title claims abstract description 30
- 125000006850 spacer group Chemical group 0.000 claims abstract description 29
- 239000004020 conductor Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 4
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical group [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 3
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
Abstract
The application discloses a permanent magnet suspension bearing with a magnet protection structure, which comprises: the magnetic attraction device comprises a bearing stator, a magnetic attraction device, a bearing rotor and an auxiliary bearing; a rotor mounting cavity is formed in the bearing stator, and a magnet mounting groove is formed in the inner wall of the bearing stator; the magnetic attraction device consists of magnets, spacers and magnetic conduction yokes, wherein the spacers are made of non-magnetic conduction materials, the spacers are arranged between adjacent magnets, and the magnetic conduction yokes are arranged between the adjacent spacers in a sealing manner; the magnetic attraction device is fixed in the magnet mounting groove; the bearing rotor is made of magnetic conductive material; the bearing rotor is arranged in a rotor mounting cavity of the bearing stator; the auxiliary bearing is arranged at least one end of the bearing rotor and is arranged between the bearing stator and the bearing rotor. Because the magnet is installed in the airtight space formed by the magnet yoke, the spacer and the bearing stator, the magnet is prevented from contacting with the external environment, the service scene of the bearing is improved, and the bearing is suitable for more severe working conditions.
Description
Technical Field
The application belongs to the technical field of bearings, and particularly relates to a permanent magnet suspension bearing with a magnet protection structure.
Background
In the field of conventional heavy-duty bearings, the load of the bearing is closely related to the allowable linear speed of the bearing, the life of the bearing and the cooling mode of the bearing. The increase in load will reduce the service life of the bearing, limit the allowable rotational speed of the bearing, and require the necessary facilities and installation conditions for cooling, replacement of the bearing.
The magnetic suspension bearing is a bearing which realizes the friction-free bearing of a bearing moving part and a relative static part by utilizing the magnetic force effect. Magnetic bearings are limited by materials, power supplies, etc., and are only implemented in some fields requiring no friction or low friction loads. In addition, in magnetic suspension bearings for ships or underwater equipment, the magnetic steel is easy to contact with aggressive liquid such as seawater, the service life of the magnetic bearing is influenced, and the structural design of the bearing under severe working conditions is not solved.
Disclosure of Invention
The application aims to provide a permanent magnet suspension bearing with a magnet protection structure.
The technical scheme for solving the technical problems is as follows: a permanent magnet suspension bearing provided with a magnet protection structure, comprising: the magnetic attraction device comprises a bearing stator, a magnetic attraction device, a bearing rotor and an auxiliary bearing; a rotor mounting cavity is formed in the bearing stator, and a magnet mounting groove is formed in the inner wall of the bearing stator; the magnetic attraction device consists of magnets, spacers and magnetic conduction yokes, wherein the spacers are made of non-magnetic conduction materials, the spacers are arranged between adjacent magnets, and the magnetic conduction yokes are arranged between the adjacent spacers in a sealing manner; the magnetic attraction device is fixed in the magnet mounting groove; the bearing rotor is made of magnetic conductive materials; the bearing rotor is arranged in a rotor mounting cavity of the bearing stator; the auxiliary bearing is arranged at least one end of the bearing rotor and is arranged between the bearing stator and the bearing rotor.
According to the permanent magnet suspension bearing provided with the magnet protection structure, the cross section of the spacer in the direction perpendicular to the axial direction of the bearing is of the T-shaped structure, the cross section of the magnetic conduction yoke iron in the direction perpendicular to the axial direction of the bearing is of the T-shaped structure, and the thickness of the spacer in the direction is equal to the sum of the thicknesses of the magnet and the magnetic conduction yoke iron in the direction.
The permanent magnet suspension bearing provided with the magnet protection structure disclosed by the application further comprises an arc-shaped structure in the section of the magnet installation groove in the axial direction of the bearing, wherein the radian of the arc-shaped structure is 30-180 degrees.
The permanent magnet suspension bearing provided with the magnet protection structure disclosed by the application is further characterized in that the magnet is of a fan ring structure, and the width of the magnet is smaller than or equal to the height of the magnet mounting groove.
The permanent magnet suspension bearing provided with the magnet protection structure disclosed by the application further has the advantage that the magnetizing direction of the magnet is axial magnetizing.
The permanent magnet suspension bearing provided with the magnet protection structure has the advantages that the magnetizing directions of adjacent magnets are opposite.
The permanent magnet suspension bearing provided with the magnet protection structure is characterized in that the bearing stator is made of non-magnetic conductive materials, or the local position where the bearing stator is adjacent to the magnetic attraction device is made of the non-magnetic conductive materials.
The permanent magnet suspension bearing provided with the magnet protection structure is further characterized in that the auxiliary bearing is one of a ball bearing, a roller bearing and a sliding bearing.
The permanent magnet suspension bearing provided with the magnet protection structure disclosed by the application is further characterized in that the bearing rotor is connected with the rotating shaft in a nested manner; or flanges are arranged at two ends of the bearing rotor and are connected with the rotating shaft by the flanges.
The permanent magnet suspension bearing provided with the magnet protection structure disclosed by the application further comprises a neodymium-iron-boron permanent magnet or a samarium-cobalt permanent magnet.
Because the magnet is installed in the airtight space formed by the magnet yoke, the spacer and the bearing stator, the magnet is prevented from contacting with the external environment, the service scene of the bearing is improved, and the bearing is suitable for more severe working conditions.
Drawings
The foregoing and/or other advantages of the present application will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative only and not limiting of the application, wherein:
FIG. 1 is a schematic view of a permanent magnet suspension bearing with a magnet protection structure according to an embodiment of the present application;
FIG. 2 is a schematic view in section A-A of FIG. 1;
FIG. 3 is a schematic view of section B-B of FIG. 1;
FIG. 4 is a schematic perspective view of a magnetic attraction device according to an embodiment of the application;
FIG. 5 is a schematic front view of a magnetic attraction device according to an embodiment of the application;
fig. 6 is a schematic view of section A-A of fig. 5.
In the drawings, the list of components represented by the various numbers is as follows:
1. the magnetic attraction device comprises a magnetic attraction device body 2, a bearing stator 3, an auxiliary bearing 4, a rotating shaft 5, a bearing rotor 101, a magnet 102, a spacer 103 and a magnetic conduction yoke.
Detailed Description
Hereinafter, an embodiment of a permanent magnet suspension bearing provided with a magnet protecting structure of the present application will be described with reference to the accompanying drawings.
The examples described herein are specific embodiments of the present application, which are intended to illustrate the inventive concept, are intended to be illustrative and exemplary, and should not be construed as limiting the application to the embodiments and scope of the application. In addition to the embodiments described herein, those skilled in the art can adopt other obvious solutions based on the disclosure of the claims and specification, including those adopting any obvious substitutions and modifications to the embodiments described herein.
The drawings in the present specification are schematic views, which assist in explaining the concept of the present application, and schematically show the shapes of the respective parts and their interrelationships. Note that, in order to clearly show the structures of the components of the embodiments of the present application, the drawings are not drawn to the same scale. Like reference numerals are used to denote like parts.
Fig. 1-3 illustrate a permanent magnet suspension bearing provided with a magnet protecting structure according to an embodiment of the present application, which includes: the magnetic attraction device comprises a bearing stator 2, a magnetic attraction device 1, a bearing rotor 5 and an auxiliary bearing 3;
a rotor mounting cavity is formed in the bearing stator 2, and a magnet 101 mounting groove is formed in the inner wall of the bearing stator 2; in a preferred embodiment, the cross section of the magnet 101 mounting groove in the axial direction of the vertical bearing is an arc-shaped structure, and the radian of the arc-shaped structure is 30-180 degrees. In a preferred embodiment, the bearing stator 2 is made of a non-magnetically conductive material, or the local location of the bearing stator 2 adjacent to the magnetic attraction device 1 is made of a non-magnetically conductive material.
As shown in fig. 4 to 6, the magnetic attraction device 1 is composed of magnets 101, spacers 102 and magnetic conductive yokes 103, wherein the spacers 102 are made of non-magnetic conductive materials, the spacers 102 are arranged between adjacent magnets 101, and the magnetic conductive yokes 103 are arranged between adjacent spacers 102 in a sealing manner; the magnetic attraction device 1 is fixed in the installation groove of the magnet 101; in a preferred embodiment, the magnet 101 is a fanned ring structure, and the width of the magnet 101 is less than or equal to the height of the mounting groove of the magnet 101. According to the scheme, the magnetic attraction device can be arranged in the magnet mounting groove to fill the space of the magnet mounting groove, so that the inner ring of the bearing stator forms a cylindrical mounting space. In a preferred embodiment, the magnetization direction of the magnet 101 is axial magnetization. In the embodiment shown in fig. 6, the magnetizing directions of the adjacent magnets 101 are opposite. In a preferred embodiment, the magnet 101 is a neodymium-iron-boron permanent magnet 101 or a samarium-cobalt permanent magnet 101.
The bearing rotor 5 is made of magnetic conductive material; the bearing rotor 5 is arranged in a rotor installation cavity of the bearing stator 2; the auxiliary bearing 3 is provided at least one end of the bearing rotor 5, and is installed between the bearing stator 2 and the bearing rotor 5. In a preferred embodiment, the auxiliary bearing 3 is one of a ball bearing, a roller bearing and a slide bearing.
In a preferred embodiment of the permanent magnet suspension bearing provided with the magnet protecting structure, the cross section of the spacer 102 in the direction perpendicular to the axial direction of the bearing is in a T-shaped structure, the cross section of the magnetic yoke 103 in the direction perpendicular to the axial direction of the bearing is in a T-shaped structure, and the thickness of the spacer 102 in the direction is equal to the sum of the thicknesses of the magnet 101 and the magnetic yoke 103 in the direction. As shown in fig. 4 and 6, the magnetic yoke is installed between two adjacent spacers, and the T-shaped structure of the magnetic yoke can make it clamped in the convex portion between two spacers, so that the magnet installed in the space formed by two adjacent spacers and the magnetic yoke is stable in position and protected by the sealing of the magnetic yoke.
The permanent-magnet suspension bearing provided with the magnet protection structure in the embodiment of the application utilizes the magnetic attraction device to attract the bearing rotor made of the magnetic conductive material, and utilizes magnetic force to balance the gravity of at least part of the rotor and the rotating shaft; the auxiliary bearing has the function of limiting the position of the bearing rotor in the radial direction, but because the auxiliary bearing bears very small force, the service life of the auxiliary bearing is different from that of a bearing arranged at a conventional position, namely the service life of a permanent-magnet suspension bearing is greatly prolonged, and the load of the bearing and the allowable linear speed of the bearing are greatly expanded. Meanwhile, as the magnet is arranged in the closed space formed by the magnet yoke, the spacer and the bearing stator, the magnet is prevented from contacting with the external environment, the service scene of the bearing is improved, and the bearing is suitable for more severe working conditions.
In a preferred embodiment, the bearing rotor 5 is connected to the shaft 4 in a nested manner; or flanges are arranged at two ends of the bearing rotor 5, and the flanges are used for connecting the rotating shaft 4.
The above disclosed features are not limited to the disclosed combinations with other features, and other combinations between features can be made by those skilled in the art according to the purpose of the application to achieve the purpose of the application.
Claims (7)
1. A permanent magnet suspension bearing provided with a magnet protection structure, comprising: the magnetic attraction device comprises a bearing stator, a magnetic attraction device, a bearing rotor and an auxiliary bearing; a rotor mounting cavity is formed in the bearing stator, and a magnet mounting groove is formed in the inner wall of the bearing stator; the magnetic attraction device consists of magnets, spacers and magnetic conduction yokes, wherein the spacers are made of non-magnetic conduction materials, the spacers are arranged between adjacent magnets, and the magnetic conduction yokes are arranged between the adjacent spacers in a sealing manner; the magnetic attraction device is fixed in the magnet mounting groove; the bearing rotor is made of magnetic conductive materials; the bearing rotor is arranged in a rotor mounting cavity of the bearing stator; the auxiliary bearing is arranged at least at one end of the bearing rotor and is arranged between the bearing stator and the bearing rotor;
the cross section of the spacer in the direction perpendicular to the axial direction of the bearing is of a T-shaped structure, the cross section of the magnetic conduction yoke iron in the direction perpendicular to the axial direction of the bearing is of a T-shaped structure, and the thickness of the spacer in the perpendicular direction is equal to the sum of the thicknesses of the magnet and the magnetic conduction yoke iron in the perpendicular direction;
the section of the magnet mounting groove in the axial direction of the vertical bearing is of an arc-shaped structure, and the radian of the arc-shaped structure is 30-180 degrees;
the magnet is of a fan ring structure, and the width of the magnet is smaller than or equal to the height of the magnet mounting groove.
2. The permanent magnet suspension bearing with a magnet protecting structure according to claim 1, wherein the magnetizing direction of the magnet is axial magnetizing.
3. The permanent magnet suspension bearing with a magnet protecting structure according to claim 2, wherein the magnetizing directions of adjacent magnets are opposite.
4. A permanent magnet suspension bearing provided with a magnet protecting structure according to any one of claims 1-3, wherein the bearing stator is made of a non-magnetically conductive material or a local position where the bearing stator is in contact with the magnetic attraction device is made of a non-magnetically conductive material.
5. The permanent magnet suspension bearing provided with a magnet protecting structure according to claim 4, wherein the auxiliary bearing is one of a ball bearing, a roller bearing and a slide bearing.
6. The permanent magnet suspension bearing with the magnet protecting structure according to claim 4, wherein the bearing rotor is connected with the rotating shaft in a nested manner; or flanges are arranged at two ends of the bearing rotor and are connected with the rotating shaft by the flanges.
7. The permanent magnet suspension bearing with the magnet protecting structure according to claim 4, wherein the magnet is a neodymium-iron-boron permanent magnet or a samarium-cobalt permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811461286.8A CN109281938B (en) | 2018-12-02 | 2018-12-02 | Permanent magnet suspension bearing with magnet protection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811461286.8A CN109281938B (en) | 2018-12-02 | 2018-12-02 | Permanent magnet suspension bearing with magnet protection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109281938A CN109281938A (en) | 2019-01-29 |
| CN109281938B true CN109281938B (en) | 2023-10-24 |
Family
ID=65174307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811461286.8A Active CN109281938B (en) | 2018-12-02 | 2018-12-02 | Permanent magnet suspension bearing with magnet protection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109281938B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219888B (en) * | 2019-06-14 | 2024-01-26 | 迈格钠磁动力股份有限公司 | Permanent magnet suspension bearing with magnet protection structure and marine transportation equipment |
| CN110242669B (en) * | 2019-06-20 | 2024-01-26 | 迈格钠磁动力股份有限公司 | Permanent magnet auxiliary support type water lubrication bearing and marine transportation equipment |
| CN114524075A (en) * | 2022-02-22 | 2022-05-24 | 中国船舶重工集团公司第七一九研究所 | Thrust bearing and ship propeller |
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