CN211574040U - Radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing - Google Patents
Radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing Download PDFInfo
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- CN211574040U CN211574040U CN202020106102.2U CN202020106102U CN211574040U CN 211574040 U CN211574040 U CN 211574040U CN 202020106102 U CN202020106102 U CN 202020106102U CN 211574040 U CN211574040 U CN 211574040U
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Abstract
The utility model discloses a radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing, which comprises a radial stator, an axial stator and a rotor positioned in the inner ring of the stator, wherein the radial stator consists of a left radial iron core and a right radial iron core; the left radial iron core and the right radial iron core are respectively and uniformly distributed with two suspension teeth along the inner circumference; the outer sides of the left stator core and the right stator core are respectively provided with a left radial magnetized permanent magnet ring and a right radial magnetized permanent magnet ring; centralized radial control windings are wound on the suspension teeth; the axial stator consists of a left axial iron core and a right axial iron core; axial control windings which are connected in series are arranged on two sides of the left radial iron core and the right radial iron core and close to the inner side of the axial stator; the rotor comprises a cylindrical rotor core and a rotating shaft. The utility model provides static bias magnetic flux by the action of the permanent magnetic ring, and the radial control magnetic flux generated by the energization of the radial control winding adjusts the corresponding bias magnetic flux; the hybrid magnetic bearing with the structure is independently designed in X and Y directions, realizes no coupling of suspension force in the X-Y direction, and is simple to control.
Description
Technical Field
The utility model relates to a non-mechanical contact magnetic bearing, in particular to a radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing which can be used as a non-contact suspension support of high-speed transmission parts such as a flywheel system, a machine tool electric spindle, a centrifugal machine and the like.
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 the following three types according to the manner in which magnetic force is provided: (1) the active magnetic bearing generates a bias magnetic field by bias current, and the control magnetic flux generated by the control current is mutually superposed with the bias magnetic flux so as to generate controllable suspension force, and the magnetic bearing has larger volume, weight and power consumption; (2) the passive magnetic bearing has the advantages that the suspension force is completely provided by the permanent magnet, the required controller is simple, the suspension power consumption is low, but the rigidity and the damping are small, and the passive magnetic bearing is generally applied to supporting an object in one direction or reducing the load acting on the traditional bearing; (3) the hybrid magnetic bearing adopts permanent magnetic materials to replace electromagnets in an active magnetic bearing to generate a bias magnetic field, and control current only provides control magnetic flux for balancing load or interference, thereby greatly reducing the power loss of the magnetic bearing, reducing the volume of the magnetic bearing, lightening the weight of the magnetic bearing and improving the bearing capacity.
The structural commonality of the existing hybrid magnetic bearing is a single-chip structural design that all radial suspension teeth are on the same plane, and the radial suspension teeth wind a control winding to generate radial control magnetic flux which interacts with corresponding bias magnetic flux to generate radial suspension force. The radial two-degree-of-freedom suspension of the hybrid magnetic bearing with the structure is realized in a single piece, so that the suspension force is coupled in the XY direction, and the control is complex.
Disclosure of Invention
The utility model aims at providing a can simplify control, compact structure makes and convenient assembling's radial no coupling three degree of freedom direct current hybrid magnetic bearing, adopts the biplate formula structure, and the suspension of two directions of X-Y is realized by independent stator core respectively, and the suspension power does not have the coupling in X-Y direction, and control is simple.
The utility model discloses a following technical scheme realizes:
a radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing comprises a radial stator, an axial stator and a rotor positioned in an inner ring of the stator, wherein the radial stator comprises a left radial iron core and a right radial iron core, and the rotor comprises a rotor iron core and a rotating shaft; the left radial iron core is uniformly provided with two suspension teeth along the inner circumference and at the positions symmetrical to the directions of the + x axis and the-x axis; two suspension teeth are uniformly distributed at the positions of the right radial iron core, which are aligned with the + y axis and the-y axis along the inner circumference; the four suspension teeth are all of a zigzag structure, one end face, close to the rotor iron core, of each suspension tooth is matched with the circumferential face of the rotor iron core, the suspension teeth are the same as the rotor iron core in axial width and are opposite to the rotor iron core in position, and radial air gaps with the same air gap length are formed between the suspension teeth and the rotor iron core; centralized radial control windings are wound on the suspension teeth; the outer sides of the left radial iron core and the right radial iron core are respectively provided with a left radial magnetized permanent magnet ring and a right radial magnetized permanent magnet ring;
the axial stator comprises a left axial iron core and a right axial iron core, the inner diameters of the left and right axial iron cores are the same as the outer diameters of the left and right radial magnetized permanent magnetic rings, and the left and right radial magnetized permanent magnetic rings are respectively sleeved with the left and right axial iron cores; the relative outside of left and right radial iron core and be close to left and right axial iron core inner ring wall and be provided with a pair of axial control winding of establishing ties each other, the pivot run through in rotor core, left and right axial iron core and left and right radial iron core.
Furthermore, the left axial iron core and the right axial iron core are arranged oppositely, sealing surfaces are arranged on the side surfaces of the left axial iron core and the right axial iron core which are relatively far away from each other, the sealing surfaces on the left axial iron core and the right axial iron core both use the center as a circle center to inwards extend to form a cylindrical ring, the inner diameter of the cylindrical ring is slightly larger than the outer diameter of the rotating shaft and extends to a position close to the rotor iron core, and a left axial air gap and a right axial air gap are respectively formed between the left side surface and.
Further, the left axial air gap is the same width as the right axial air gap.
Further, the left radial iron core, the right radial iron core, the left axial iron core, the right axial iron core and the rotor iron core are all made of magnetic conductive materials;
furthermore, the left and right radial magnetized permanent magnetic rings are made of rare earth permanent magnetic materials.
Has the advantages that:
1. the utility model provides static bias magnetic flux by the action of the permanent magnetic ring, and the radial control magnetic flux generated by the energization of the radial control winding adjusts the corresponding bias magnetic flux; the hybrid magnetic bearing with the structure is independently designed in X and Y directions, adopts a double-sheet structure, and designs the suspension teeth into a zigzag structure, so that the suspension teeth in the X direction and the Y direction are coplanar with the rotor core, the suspension force is not coupled in the X-Y direction, and the control is simple.
2. The utility model discloses increase a pair of axial stator, make the utility model discloses hybrid magnetic bearing produces three degrees of freedom.
Drawings
Fig. 1 is a structural diagram of the radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing of the present invention;
FIG. 2 is a structural diagram of the left and right axial iron cores of the present invention;
fig. 3 is a suspension magnetic flux diagram of the radial non-coupling three-degree-of-freedom dc hybrid magnetic bearing of the present invention.
1-left radial core, 101-floating tooth a, 102-floating tooth B, 2-right radial core, 201-floating tooth C, 202-floating tooth D, 3-left axial core, 301-left closed face, 302-left cylindrical ring, 4-right axial core, 401-right closed face, 402-right cylindrical ring, 5-left radial magnetized permanent magnet ring, 6-right radial magnetized permanent magnet ring, 7-left axial control winding, 8-radial control winding, 9-right axial control winding, 10-rotor core, 11-rotating shaft, 12-static bias flux, 13-right axial air gap, 14-radial air gap, 15-axial control flux, 16-left axial air gap.
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 "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; 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 concrete structure is as shown in fig. 1, the utility model discloses a radial no-coupling three-degree-of-freedom direct-current hybrid magnetic bearing, including radial stator, axial stator and the rotor that is located the stator inner circle.
Radial stator includes radial iron core 1 in a left side and radial iron core 2 in a right side, and radial iron core 1 in a left side and radial iron core 2 in a right side are the same ring structure of size, and the radial iron core 1 in a left side evenly distributed along the interior circumference two suspension teeth are marked as suspension tooth A101 and suspension tooth B102 respectively, and suspension tooth A101 and suspension tooth B102 align with + x axle and-x axle direction respectively. Two suspension teeth are uniformly distributed on the right radial iron core 2 along the inner circumference and are respectively marked as suspension teeth C201 and suspension teeth D202, and the suspension teeth C201 and the suspension teeth D202 are respectively aligned with the + y axis direction and the-y axis direction. Referring to the attached drawing 1, namely, the suspension teeth a and B are located at two ends of the diameter of the inner ring of the left radial iron core 1, the suspension teeth C and D are located at two ends of the diameter of the inner ring of the right radial iron core 2, and the connecting line of the suspension teeth a and B is perpendicular to the connecting line of the suspension teeth C and D.
The rotor comprises a cylindrical rotor core 10 and a rotating shaft 11, and the rotating shaft 11 penetrates through the rotor core 10.
The outer sides of the left and right radial iron cores (1, 2) are respectively provided with a left and right radial magnetized permanent magnetic rings (5, 6). The four suspension teeth a101, B102, C201 and D202 are all zigzag structures, see fig. 3. The front-view projection of the suspension teeth A101, the suspension teeth B102, the suspension teeth C201 and the suspension teeth D202 is superposed with the left edge and the right edge of the vertical part of the rotor core 10, namely, the end faces of the four suspension teeth close to the rotor core 10 are the same as the axial width of the rotor core 10 and are opposite to the axial width of the rotor core 10, and the end faces of the four suspension teeth close to the rotor core 10 are arc-shaped end faces, and the radian of the end faces is matched with the radian of the circumferential face of the. Radial air gaps 14 with equal air gap length are formed between the four suspension teeth and the rotor core 10. And the suspension teeth A101, B102, C201 and D202 are wound with centralized radial control windings 8.
Axial stator includes left axial iron core 3 and right axial iron core 4, and left axial iron core 3 and right axial iron core 4 are the same ring structure of relative external diameter that sets up, and left axial iron core 3 left surface sets up left closed surface 301, and right axial iron core 4 has the side to set up right closed surface 401. Therefore, the left axial iron core 3 and the right axial iron core 4 are combined to form a cylinder, the closed surfaces on the left and right axial iron cores (3, 4) both use the circle center as the center to inwards extend to form a cylinder ring, referring to fig. 2, the left closed surface 301 of the left axial iron core 3 extends to one side close to the right axial iron core 4 by using the central point as the original point to form a left cylinder ring 302, and the right closed surface 401 of the right axial iron core 4 extends to one side close to the left axial iron core 3 by using the central point as the original point to form a right cylinder ring 402. The inner diameters of the left cylindrical ring 302 and the right cylindrical ring 402 are slightly larger than the outer diameter of the rotating shaft 11, and the rotating shaft 11 penetrates through the rotor core 10 and then also penetrates through the left cylindrical ring 302 and the right cylindrical ring 402. Left cylindrical ring 302 is close to the left side of rotor core 10 and forms left axial air gap 16 with the left side of rotor core 10, and right cylindrical ring 402 is close to the right side of rotor core 10 and forms right axial air gap 13 with the right side of rotor core 10. The left axial air gap 16 is the same width as the right axial air gap 13.
The inner diameters of the circular rings of the left and right axial iron cores (3, 4) are the same as the outer diameters of the left and right radial magnetized permanent magnetic rings (5, 6), so that the left axial iron core 3 is sleeved on the left radial magnetized permanent magnetic ring 5, and the right axial iron core 4 is sleeved on the right radial magnetized permanent magnetic ring 6. Because the left and right sides of the left and right axial iron cores (3, 4) are respectively provided with a closed surface, the left and right radial magnetized permanent magnetic rings (5, 6), the left and right radial iron cores (1, 2), the rotor iron core 10 and the like are respectively arranged in the left and right axial iron cores (3, 4), see the attached figure 2.
A left axial control winding 7 is arranged on the left side of the left radial iron core 1 and close to a left closed surface 301 of the left axial iron core 3, a right axial control winding 9 is arranged on the right radial iron core 2 and close to a right closed surface 401 of the right axial iron core 4, the left axial control winding 7 and the right axial control winding 9 are connected in series, and the outer diameter of the left axial control winding is equal to the inner diameter of a ring of the left axial iron core (3) and the right axial iron core (4).
The static bias magnetic flux 12 generated by the right radial magnetized permanent magnet ring 6 starts from the N pole, passes through the right axial iron core 4, the right axial air gap 13, the rotor iron core 10, the radial air gap 14, the suspension teeth C201 and the suspension teeth D202 on the right axial iron core 2, and returns to the S pole. The principle of the bias magnetic flux generated on the left axial iron core 1 by the permanent magnet ring 5 is the same.
The radial control magnetic flux generated on the left radial core 1 by the radial control winding 8 passes through the yoke portion of the left radial core 1, and the floating teeth a101 and B102 and the rotor core 10 form a closed circuit. The radial control flux generated in the right radial core 2 is the same in principle.
The axial control magnetic flux 15 generated by the left and right axial control windings (7, 9) forms a closed path through the left and right axial iron cores (3, 4) and the left and right axial air gaps (16, 13).
Suspension principle: static bias magnetic flux 12 interacts with radial control magnetic flux and axial control magnetic flux 15 respectively, so that the superposition of air gap magnetic fields on the same side with the radial eccentric direction of the rotor is weakened, the superposition of air gap magnetic fields in the opposite direction is strengthened, force opposite to the offset direction of the rotor is generated on the rotor, and the rotor is pulled back to a radial balance position.
The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.
Claims (5)
1. A radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing comprises a radial stator, an axial stator and a rotor positioned in an inner ring of the stator, and is characterized in that,
the radial stator comprises a left radial iron core and a right radial iron core, and the rotor comprises a rotor iron core and a rotating shaft; the left radial iron core is uniformly provided with two suspension teeth along the inner circumference and at the positions symmetrical to the directions of the + x axis and the-x axis; two suspension teeth are uniformly distributed at the positions of the right radial iron core along the inner circumference and symmetrical to the directions of the + y axis and the-y axis; the four suspension teeth are all of a zigzag structure, one end face, close to the rotor iron core, of each suspension tooth is matched with the circumferential face of the rotor iron core, the suspension teeth are the same as the rotor iron core in axial width and are opposite to the rotor iron core in position, and radial air gaps with the same air gap length are formed between the suspension teeth and the rotor iron core; centralized radial control windings are wound on the suspension teeth; the outer sides of the left radial iron core and the right radial iron core are respectively provided with a left radial magnetized permanent magnet ring and a right radial magnetized permanent magnet ring;
the axial stator comprises a left axial iron core and a right axial iron core, the inner diameters of the left and right axial iron cores are the same as the outer diameters of the left and right radial magnetized permanent magnetic rings, and the left and right radial magnetized permanent magnetic rings are respectively sleeved with the left and right axial iron cores; the relative outside of left and right radial iron core and be close to left and right axial iron core inner ring wall and be provided with a pair of axial control winding of establishing ties each other, the pivot run through in rotor core, left and right axial iron core and left and right radial iron core.
2. The radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing as claimed in claim 1, wherein the left and right axial cores are disposed opposite to each other, and both sides thereof away from each other are disposed with a sealing surface, the sealing surfaces of the left and right axial cores extend inward with the center as a circle center to form a cylindrical ring, the inner diameter of the cylindrical ring is slightly larger than the outer diameter of the rotating shaft and extends to a position close to the rotor core, and a left and right axial air gap is formed between the cylindrical ring and the left and right sides of the rotor core.
3. The radial uncoupled three-degree-of-freedom direct-current hybrid magnetic bearing of claim 2, wherein the left axial air gap and the right axial air gap are the same width.
4. The radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing according to any one of claims 1 to 3, wherein the left and right radial cores, the left and right axial cores, and the rotor core are made of a magnetically conductive material.
5. The radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing according to any one of claims 1 to 3, wherein the left and right radial magnetized permanent magnet rings are made of rare earth permanent magnet material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020106102.2U CN211574040U (en) | 2020-01-17 | 2020-01-17 | Radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020106102.2U CN211574040U (en) | 2020-01-17 | 2020-01-17 | Radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing |
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| CN211574040U true CN211574040U (en) | 2020-09-25 |
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| CN202020106102.2U Expired - Fee Related CN211574040U (en) | 2020-01-17 | 2020-01-17 | Radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111173838A (en) * | 2020-01-17 | 2020-05-19 | 淮阴工学院 | Radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing |
| CN112253624A (en) * | 2020-10-27 | 2021-01-22 | 珠海格力电器股份有限公司 | Radial hybrid magnetic suspension bearing assembly and motor with same |
-
2020
- 2020-01-17 CN CN202020106102.2U patent/CN211574040U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111173838A (en) * | 2020-01-17 | 2020-05-19 | 淮阴工学院 | Radial non-coupling three-degree-of-freedom direct-current hybrid magnetic bearing |
| CN112253624A (en) * | 2020-10-27 | 2021-01-22 | 珠海格力电器股份有限公司 | Radial hybrid magnetic suspension bearing assembly and motor with same |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201224 Address after: 223001 1-348, commercial floor 3, Yigao Plaza, qingjiangpu District, Huai'an City, Jiangsu Province Patentee after: Huaian yiyisheng Intelligent Technology Co.,Ltd. Address before: 223005 Jiangsu Huaian economic and Technological Development Zone, 1 East Road. Patentee before: HUAIYIN INSTITUTE OF TECHNOLOGY |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200925 Termination date: 20220117 |
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| CF01 | Termination of patent right due to non-payment of annual fee |