CN211343731U - Radial mixed magnetic bearing without winding - Google Patents
Radial mixed magnetic bearing without winding Download PDFInfo
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- CN211343731U CN211343731U CN201922467551.XU CN201922467551U CN211343731U CN 211343731 U CN211343731 U CN 211343731U CN 201922467551 U CN201922467551 U CN 201922467551U CN 211343731 U CN211343731 U CN 211343731U
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- iron core
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Abstract
The utility model relates to a non-mechanical contact magnetic bearing field discloses a radial no winding hybrid magnetic suspension bearing, including the stator with be located the rotor of stator inner circle. The stator is an integral body consisting of a left side outer magnetic conductive ring, four left side arc iron cores, a left side stator iron core, a stator permanent magnetic ring, a right side stator iron core, a right side arc iron core and a right side outer magnetic conductive ring which are sequentially arranged from left to right, wherein the number of the right side arc iron cores is the same as that of the left side arc iron cores, and the right side arc iron cores and the right side outer magnetic conductive; the rotor comprises a left rotor iron core, a rotor permanent magnet ring, a right rotor iron core and a rotating shaft. The utility model provides static bias magnetic flux by the combined action of the stator permanent magnetic ring and the rotor permanent magnetic ring, and the control magnetic flux generated by the control winding is electrified to adjust the corresponding bias magnetic flux; the radial magnetic pole of the hybrid magnetic bearing with the structure has no winding, the area of the magnetic pole can be designed to be maximum, the radial bearing capacity is effectively increased, the structure is compact, and the assembly is convenient.
Description
Technical Field
The utility model relates to a non-mechanical contact magnetic bearing field refers in particular to a radial no winding hybrid magnetic bearing, can regard as the contactless suspension support of high-speed drive parts such as flywheel system, lathe electricity main shaft, centrifuge.
Background
The magnetic bearing is a novel high-performance bearing which suspends a rotor in a space by utilizing electromagnetic force between a stator and the rotor so that the stator and the rotor are not in mechanical contact. Currently, magnetic bearings are classified into ac and dc types according to the type of control current. The alternating current type magnetic bearing adopts a three-pole magnetic bearing driven by a three-phase inverter, so that the volume of a power amplifier and the cost of the magnetic bearing are reduced, but a three-pole structure is asymmetric in space, and the sum of three-phase currents of the three-phase inverter is required to be zero, so that the maximum suspension force of the suspension force in two radial degrees of freedom is unequal; in addition, the suspension force of the three-pole alternating current magnetic bearing is serious in nonlinearity with current and displacement, and two radial degrees of freedom are coupled. The direct-current magnetic bearing is generally an octopole or quadrupole structure, and the radial two-degree-of-freedom of the magnetic bearing of the structure needs four paths of unipolar or two paths of bipolar direct-current power, so that the performance is excellent.
The structural commonality of the existing four-pole hybrid magnetic bearing is that a radial stator magnetic pole winds a control winding to generate radial control magnetic flux, and the radial control magnetic flux passes through a radial working air gap and interacts with corresponding bias magnetic flux to generate radial suspension force. The axial and radial control winding of the hybrid magnetic bearing with the structure occupies radial space, the radial magnetic pole area cannot be maximized, the radial bearing capacity is small, the axial length is long, and the critical rotating speed is low.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: to the problem that exists among the prior art, the utility model provides a radial no winding hybrid magnetic bearing, radial magnetic pole do not have the winding, and the magnetic pole area can design the biggest, has effectively increased radial bearing capacity and has reduced the manufacturing and assemble the degree of difficulty, compact structure, and suspension force density is big.
The technical scheme is as follows: the utility model provides a radial no-winding hybrid magnetic bearing, which comprises a stator and a rotor positioned in the inner ring of the stator, wherein the stator is a whole consisting of a left side outer magnetic conductive ring, four left side arc iron cores, a left side stator iron core, a stator permanent magnetic ring, a right side stator iron core, a right side arc iron core and a right side outer magnetic conductive ring, which are arranged in sequence from left to right, and are distributed at equal intervals on the circumferential edge and have the same size; the left and right stator cores are uniformly divided into four blocks along the circumference by four same magnetic isolation aluminum blocks respectively; the outer diameters of the stator permanent magnet ring and the left and right stator iron cores are the same; the left and right outer magnetic conductive rings are respectively connected with the left and right stator iron cores through the left and right arc iron cores; the left and right arc-shaped iron cores are respectively positioned between two magnetic isolation aluminum blocks which are adjacent in the radial direction of the left and right sides, and a centralized control winding is wound on the left and right arc-shaped iron cores;
the rotor comprises a left rotor iron core, a rotor permanent magnet ring, a right rotor iron core and a rotating shaft which are sequentially arranged from left to right; the left rotor iron core and the right rotor iron core are respectively opposite to the left stator iron core and the right stator iron core and are provided with a left suction disc and a right suction disc which are protruded at the rotor iron core parts with the same width, the left suction disc and the right suction disc respectively form a left radial air gap and a right radial air gap with the left stator iron core and the right stator iron core, and the rotating shaft penetrates through the left rotor iron core, the right rotor iron core and the rotor permanent magnetic ring.
Furthermore, the control winding is used for suspension control, and the two opposite pole windings on the left side and the right side are respectively connected in series or in parallel in an opposite direction to control four radial degrees of freedom; after the two opposite pole windings on the left side and the right side are respectively connected in series or in parallel in the reverse direction, the windings on the left side and the right side at the same position are connected in series or in parallel in the same direction, and the radial two degrees of freedom are controlled.
Furthermore, the left and right stator cores, the four left arc-shaped cores and the four right arc-shaped cores are made of magnetic conductive materials.
Furthermore, the stator permanent magnet ring and the rotor permanent magnet ring are made of rare earth permanent magnet materials.
Furthermore, the axial lengths of the left suction disc and the right suction disc are equal to the axial lengths of the left radial stator core and the right radial stator core.
Has the advantages that:
1. the utility model discloses radial no winding hybrid magnetic bearing magnetic pole area can design to the biggest, has effectively increased radial bearing capacity and has reduced the manufacturing and assemble the degree of difficulty, compact structure, and suspension power density is big.
2. The utility model discloses adopt four left and right sides arc iron cores in the stator, it is four poles direct current formula hybrid magnetic bearing.
Drawings
FIG. 1 is a schematic structural view of a radial winding-free hybrid magnetic bearing of the present invention;
FIG. 2 is a radial no-winding hybrid magnetic bearing suspension magnetic flux diagram of the present invention;
fig. 3 is a left side view of the arc-shaped iron core on the left side of the radial winding-free hybrid magnetic bearing of the present invention.
1-left side outer magnetic conductive ring, 2-left side arc iron core, 3-control winding, 4-left side stator iron core, 5-stator permanent magnetic ring, 6-right side stator iron core, 7-right side arc iron core, 8-right side outer magnetic conductive ring, 9-magnetic isolation aluminum block, 10-left rotor iron core, 11-right rotor iron core, 12-left suction disc, 13-right suction disc, 14-rotor permanent magnetic ring, 15-rotating shaft, 16-left radial air gap, 17-right radial air gap, 18-radial suspension control magnetic flux, 19-static bias magnetic flux.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected" and "connecting" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The utility model relates to a non-mechanical contact magnetic bearing field discloses a radial no winding hybrid magnetic bearing, in this embodiment, including the stator with be located the rotor of stator inner circle, the stator is by left side outer magnetic ring 1, four equidistance that from left to right arrange in proper order distribute in the same left side arc iron core 2 of size on the circumference, left side stator iron core 4, stator permanent magnetism ring 5, right side stator iron core 6, with the whole that right side arc iron core 7 and right side outer magnetic ring 8 that left side arc iron core 2 symmetry set up constitute. In the stator of the embodiment, four arc iron cores 2 are distributed at equal intervals to form a circular ring, so that a four-pole direct-current type winding-free hybrid magnetic bearing is formed.
Left side stator core 4, right side stator core 6 are by respectively with 4 even polylith of following the circumference of dividing into of magnetism aluminium piece 9, notice: the arc-shaped stator iron cores formed between two adjacent magnetism isolating aluminum blocks 9 correspond to the left arc-shaped iron core 2 and the right arc-shaped iron core 7 one by one. The outer diameters of the stator permanent magnet ring 5, the left stator iron core 4 and the right stator iron core 6 are the same. The left outer magnetic conductive ring 1 is connected with the left stator core 4 through the left arc-shaped core 2. The right outer magnetic conductive ring 8 is connected with the right stator core 6 through the right arc core 7. The left arc-shaped iron core 2 is positioned between two magnetic isolation aluminum blocks 9 which are adjacent in the radial direction on the left side, and the right arc-shaped iron core 7 is positioned between two magnetic isolation aluminum blocks 9 which are adjacent in the radial direction on the right side. And the left arc-shaped iron core 2 and the right arc-shaped iron core 7 are wound with the centralized control winding 3.
The rotor comprises a left rotor iron core 10, a rotor permanent magnet ring 14, a right rotor iron core 11 and a rotating shaft 15 which are sequentially arranged from left to right.
The left rotor core and the right rotor core are respectively opposite to the left stator core and the right stator core and are respectively provided with a left suction disc and a right suction disc which are protruded, referring to the attached drawing 1, the left stator core 4 and the right stator core 7 are designed in a circular hollow mode, the left rotor core 10 is opposite to the left stator core 4, the outer surface of the left rotor core 10 is provided with a left suction disc 12, the width of the left suction disc 12 is the same as that of the left stator core 4, and a left radial air gap 16 is formed between the left suction disc 12 and the inner ring surface of the left stator core. The right rotor core 11 is opposite to the right stator core 6, a right suction disc 13 is arranged on the outer surface of the right rotor core 11, the width of the right suction disc 13 is the same as that of the right stator core 6, and a right radial air gap 17 is formed between the right suction disc 13 and the inner ring surface of the right stator core 6. The rotating shaft 15 penetrates through the left rotor core 10, the right rotor core 11 and the rotor permanent magnet ring 15 to play a supporting role.
The control winding 3 is used for suspension control, and the two opposite pole windings on the left side and the right side are respectively connected in series or in parallel in an opposite direction to control four radial degrees of freedom; after the two opposite pole windings on the left side and the right side are respectively connected in series or in parallel in the reverse direction, the windings on the left side and the right side at the same position are connected in series or in parallel in the same direction, and the radial two degrees of freedom are controlled.
The left stator core 4, the right stator core 6, the eight arc cores (4 left arc cores 2 and 4 right arc cores 7), the left outer magnetic conductive ring 1, the right outer magnetic conductive ring 8, the left rotor core 10 and the right rotor core 11 are all made of a whole piece of magnetic conductive material. The stator permanent magnet ring 5 and the rotor permanent magnet ring 14 are made of rare earth permanent magnet materials.
The stator permanent magnet ring 5 and the rotor permanent magnet ring 14 provide static bias magnetic flux 19, and the magnetic circuit of the static bias magnetic flux 19 is as follows: the magnetic flux starts from the N pole of the stator permanent magnet ring 5, passes through the right stator core 6, the right radial air gap 17, the S pole of the rotor permanent magnet ring 14, the N pole of the rotor permanent magnet ring 14, the left radial air gap 16, the left stator core 4, and returns to the S pole of the stator permanent magnet ring 5.
Assuming that the left side view of the left side arc core in fig. 1 is seen in fig. 3, the 4 left side arc cores are labeled respectively: 2d, 2e, 2f, 2 g.
The radial suspension control magnetic flux 18 generated by electrifying the radial control winding 3 wound on the left arc-shaped iron core 2d has a magnetic circuit as follows: the left arc-shaped iron core 2d, the left outer magnetic conductive ring 1, the left arc-shaped iron core 2f, the left stator iron core 4, the left radial air gap 16, the left suction disc 12, the left radial air gap 16 and the left stator iron core 4 form a closed path.
Suspension principle: the static bias flux 19 in the radial direction interacts with the radial levitation control flux 18, so that the air gap magnetic field superposition on the same side of the rotor radial eccentricity direction is weakened, and the air gap magnetic field superposition on the opposite direction is strengthened, and a force opposite to the rotor offset direction is generated on the rotor to pull the rotor back to the radial equilibrium position.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (5)
1. A radial non-winding hybrid magnetic bearing comprises a stator and a rotor positioned in the inner ring of the stator, and is characterized in that,
the stator is an integral body consisting of a left side outer magnetic conductive ring, four left side arc iron cores, a left side stator iron core, a stator permanent magnetic ring, a right side stator iron core, a right side arc iron core and a right side outer magnetic conductive ring, wherein the left side outer magnetic conductive ring, the four left side arc iron cores are equidistantly distributed on the circumference and have the same size; the left and right stator cores are uniformly divided into four blocks along the circumference by four same magnetic isolation aluminum blocks respectively; the outer diameters of the stator permanent magnet ring and the left and right stator iron cores are the same; the left and right outer magnetic conductive rings are respectively connected with the left and right stator iron cores through the left and right arc iron cores; the left and right arc-shaped iron cores are respectively positioned between two magnetic isolation aluminum blocks which are adjacent in the radial direction of the left and right sides, and a centralized control winding is wound on the left and right arc-shaped iron cores;
the rotor comprises a left rotor iron core, a rotor permanent magnet ring, a right rotor iron core and a rotating shaft which are sequentially arranged from left to right; the left rotor iron core and the right rotor iron core are respectively opposite to the left stator iron core and the right stator iron core and are provided with a left suction disc and a right suction disc which are protruded at the rotor iron core parts with the same width, the left suction disc and the right suction disc respectively form a left radial air gap and a right radial air gap with the left stator iron core and the right stator iron core, and the rotating shaft penetrates through the left rotor iron core, the right rotor iron core and the rotor permanent magnetic ring.
2. The radial winding-less hybrid magnetic bearing of claim 1, wherein the control windings are used for levitation control, and the left and right opposite pole windings are respectively connected in series or in parallel in opposite directions to control four radial degrees of freedom; after the two opposite pole windings on the left side and the right side are respectively connected in series or in parallel in the reverse direction, the windings on the left side and the right side at the same position are connected in series or in parallel in the same direction, and the radial two degrees of freedom are controlled.
3. The radial windless hybrid magnetic bearing of claim 1, wherein the left and right stator cores, the four left arc cores, the four right arc cores, the left and right outer flux rings, and the left and right rotor cores are made of a magnetically conductive material.
4. The radial windless hybrid magnetic bearing of claim 1 wherein the stator permanent magnet ring and rotor permanent magnet ring are made of rare earth permanent magnet material.
5. The radial windless hybrid magnetic bearing of claim 1 wherein the left and right suction discs are of equal axial length to the left and right radial stator cores.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922467551.XU CN211343731U (en) | 2019-12-31 | 2019-12-31 | Radial mixed magnetic bearing without winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922467551.XU CN211343731U (en) | 2019-12-31 | 2019-12-31 | Radial mixed magnetic bearing without winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211343731U true CN211343731U (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922467551.XU Expired - Fee Related CN211343731U (en) | 2019-12-31 | 2019-12-31 | Radial mixed magnetic bearing without winding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211343731U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022498A (en) * | 2019-12-31 | 2020-04-17 | 淮阴工学院 | Radial mixed magnetic bearing without winding |
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2019
- 2019-12-31 CN CN201922467551.XU patent/CN211343731U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022498A (en) * | 2019-12-31 | 2020-04-17 | 淮阴工学院 | Radial mixed magnetic bearing without winding |
| CN111022498B (en) * | 2019-12-31 | 2023-09-29 | 淮阴工学院 | Radial winding-free hybrid magnetic bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201225 Address after: 211100 l6008, 6th floor, Youzhi building, 29 Kejian Road, Jiangning District, Nanjing City, Jiangsu Province Patentee after: Nanjing fangbei IOT Technology Co.,Ltd. Address before: 223100 A12-2, high tech Industrial Park, three East seven street, Hongze District, Huaian, Jiangsu (Hongze technology transfer center Hongze sub center) Patentee before: HUAIYIN INSTITUTE OF TECHNOLOGY |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200825 Termination date: 20201231 |