CN214424915U - Halbach array magnetic-gathering ring magnetic suspension bearing - Google Patents
Halbach array magnetic-gathering ring magnetic suspension bearing Download PDFInfo
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- CN214424915U CN214424915U CN202120048045.1U CN202120048045U CN214424915U CN 214424915 U CN214424915 U CN 214424915U CN 202120048045 U CN202120048045 U CN 202120048045U CN 214424915 U CN214424915 U CN 214424915U
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Abstract
The utility model relates to a Halbach array gathers magnetic ring magnetic suspension bearing, it gathers the magnetic ring including installation section of thick bamboo, rotor, controller, a plurality of electric excitation mechanism and a plurality of permanent magnet, and the rotor endotheca is in installation section of thick bamboo. A plurality of electric excitation mechanisms are evenly arranged on the inner side wall of the installation barrel, and the plurality of electric excitation mechanisms are excited along the circumferential direction of the installation barrel. The permanent magnet gathering rings are uniformly arranged on the inner side wall of the mounting cylinder, and the permanent magnet gathering rings and the electric excitation mechanisms are sequentially and alternately distributed. The electric excitation mechanisms are connected with the controller, and the electric excitation mechanisms adjust the electric excitation current according to the air gap change of each degree of freedom zone under the control of the controller, so that the magnetic suspension electromagnetic force is changed, and the concentric operation of the height of the bearing and the motor rotating shaft is achieved. The utility model discloses a magnetic suspension bearing need not stator yoke and iron core magnetic pole, and small, light in weight do not have the stator iron and consume. The magnetic suspension bearing requires small electric excitation power, high efficiency and large electromagnetic buoyancy, and is suitable for a high-speed motor transmission system.
Description
Technical Field
The utility model relates to a magnetic suspension bearing technical field especially relates to a Halbach array gathers magnetic ring magnetic suspension bearing.
Background
In the field of rotating machinery technology, with the development of technology, the requirement on the rotating speed of a bearing is higher and higher. The traditional mechanical bearing generates heat and is fast in abrasion and large in energy loss under high-speed operation, and the requirement of high rotating speed of some ultrahigh-speed operation equipment cannot be better met, for example, a centrifugal separator adopted in uranium isotope separation needs to operate at a supercritical rotating speed of a rotor in order to improve single-stage separation power.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In view of prior art's the aforesaid is not enough, the utility model provides a Halbach array gathers magnetic ring magnetic suspension bearing, it has solved the big and big technical problem of energy consumption of high-speed bearing wearing and tearing.
(II) technical scheme
In order to achieve the above object, the utility model discloses a Halbach array gathers magnetic ring magnetic suspension bearing includes:
the permanent magnet excitation device comprises an installation cylinder, a rotor, a controller, a plurality of electric excitation mechanisms and a plurality of permanent magnet magnetic gathering rings;
the rotor is sleeved in the mounting cylinder, and can rotate in the mounting cylinder;
the plurality of electric excitation mechanisms are uniformly arranged on the inner side wall of the mounting cylinder and are excited along the circumferential direction of the mounting cylinder;
the permanent magnet gathering rings are uniformly arranged on the inner side wall of the mounting cylinder, and the permanent magnet gathering rings and the electric excitation mechanisms are sequentially and alternately distributed;
the plurality of electrically excited actuating mechanisms are each connected to the controller.
Optionally, the permanent magnet magnetism collecting rings include a first magnetism collecting ring, a second magnetism collecting ring, a third magnetism collecting ring and a fourth magnetism collecting ring;
the electrical excitation mechanism comprises a first excitation mechanism, a second excitation mechanism, a third excitation mechanism and a fourth excitation mechanism;
the first magnetism gathering ring and the third magnetism gathering ring are arranged oppositely, the second magnetism gathering ring and the fourth magnetism gathering ring are arranged oppositely, the magnetizing directions of the first magnetism gathering ring and the third magnetism gathering ring face to the rotor, and the magnetizing directions of the second magnetism gathering ring and the fourth magnetism gathering ring face to the mounting cylinder;
the first excitation mechanism is disposed opposite to the third excitation mechanism, and the second excitation mechanism is disposed opposite to the fourth excitation mechanism.
Optionally, the first magnetic flux gathering ring, the second magnetic flux gathering ring, the third magnetic flux gathering ring, and the fourth magnetic flux gathering ring each include: the first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet are sequentially connected;
the first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet are all arranged on the inner side wall of the mounting cylinder;
the first permanent magnet and the fourth permanent magnet are magnetized along the diagonal direction, the second permanent magnet and the third permanent magnet are magnetized along the radial direction, and a magnetic isolating block is arranged between the second permanent magnet and the third permanent magnet.
Optionally, the first, second, third and fourth excitation mechanisms each comprise: an electrically excited soft magnetic core and an excitation winding;
the electric excitation soft magnetic iron core is arranged on the inner side wall of the installation cylinder, and the excitation winding is wound on the electric excitation soft magnetic iron core;
the excitation winding is connected with the controller.
Optionally, the mounting cylinder is made of a non-magnetically conductive material.
Optionally, the rotor comprises: the rotating shaft and a rotor iron core fixedly sleeved on the rotating shaft; the rotor core is sleeved in the mounting cylinder and can rotate in the mounting cylinder.
Optionally, the thickness of the rotor core is greater than the thickness of the permanent magnet flux ring.
Optionally, the Halbach array magnetic flux collecting ring magnetic suspension bearing further includes:
the bearing comprises a bearing shell, a first end cover and a second end cover;
the bearing shell is fixedly sleeved on the mounting cylinder, the first end cover and the second end cover are respectively and fixedly connected with two ends of the bearing shell in a one-to-one correspondence manner, and two ends of the rotating shaft are respectively and rotatably connected with the first end cover and the second end cover in a one-to-one correspondence manner;
the bearing housing, the first end cap, and the second end cap are all made of a non-magnetic material.
Optionally, the controller comprises a microprocessor and a plurality of power circuits;
each of the electrically excited magnetic mechanisms is connected to the microprocessor through one of the power circuits.
Optionally, the Halbach array magnetic flux collecting ring magnetic suspension bearing further includes: a plurality of displacement sensors and amplifiers;
the displacement sensors are uniformly arranged on the mounting cylinder and are used for detecting the distance between the permanent magnet gathering ring and the rotor; the displacement sensor is connected with the microprocessor through the amplifier.
(III) advantageous effects
The electric excitation mechanisms are connected with the controller, and under the control of the controller, the electric excitation mechanisms adjust electric excitation current according to air gap changes of the various degree of freedom zones, control magnetic flux to change magnetic suspension electromagnetic force, realize the feedback control of concentricity of the magnetic suspension bearing and the motor rotating shaft, and achieve the concentric operation of the height of the bearing and the motor rotating shaft. The utility model discloses a magnetic suspension bearing need not stator yoke and iron core magnetic pole, and small, light in weight do not have the stator iron and consume. The magnetic suspension bearing requires small electric excitation power, high efficiency and large electromagnetic buoyancy, and is suitable for a high-speed motor transmission system.
Drawings
Fig. 1 is a schematic view of a radial cross section structure of the Halbach array magnetic gathering ring magnetic suspension bearing of the present invention;
fig. 2 is a schematic axial sectional structural view of the Halbach array magnetic flux collecting ring magnetic suspension bearing of the present invention;
fig. 3 is a schematic structural diagram of the Halbach array magnetic flux collecting ring magnetic suspension bearing of the present invention;
fig. 4 is a schematic diagram of the controller of the Halbach array magnetic flux collecting ring magnetic suspension bearing of the present invention;
figure 5 is the electric excitation power circuit connection diagram of the Halbach array magnetic gathering ring magnetic suspension bearing of the utility model.
[ description of reference ]
01: a bearing housing; 02: mounting the cylinder; 03: a rotor core; 04: a rotating shaft; 05: an air gap; 06: a permanent magnet poly-magnetic ring; 07: a magnetism isolating block; 08: an electrically excited winding; 09: an excitation soft magnetic core; 11: a first end cap; 12: a second end cap; 13: a displacement sensor; 14: a microprocessor; 17: a differential amplifier; 18: a power circuit; 20: a communication interface;
21: a first flux ring; 22: a second poly-magnetic ring; 23: a third magnetism gathering ring; 24: a fourth magnetic flux collecting ring;
31: a first excitation mechanism; 32: a second excitation mechanism; 33: a third excitation mechanism; 34: a fourth excitation mechanism;
t1: a first power tube; t2: a second power tube; d1: a first diode; d2: a second diode.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings. In which the terms "upper", "lower", etc. are used herein with reference to the orientation of fig. 1.
For a better understanding of the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The utility model provides a Halbach array gathers magnetic ring magnetic suspension bearing, figure 1 does the utility model discloses a Halbach array gathers magnetic ring magnetic suspension bearing's radial cross section structure sketch map, as shown in figure 1, Halbach array gathers magnetic ring magnetic suspension bearing and includes that installation section of thick bamboo 02, rotor, controller, a plurality of electric excitation mechanism and a plurality of permanent magnet gather magnetic ring 06. The rotor rotates the cover and establishes in installation section of thick bamboo 02, and the rotor can be at installation section of thick bamboo 02 internal rotation. The plurality of electric excitation mechanisms are uniformly arranged on the inner side wall of the mounting cylinder 02, and the plurality of electric excitation mechanisms are excited along the circumferential direction of the mounting cylinder 02. The permanent magnet gathering rings 06 are uniformly arranged on the inner side wall of the mounting cylinder 02, and the permanent magnet gathering rings 06 and the electric excitation mechanisms are sequentially and alternately distributed. The permanent magnet poly-magnetic ring 06 and the installation cylinder 02 form a stator of a traditional magnetic suspension bearing, and the installation cylinder 02 is made of a non-magnetic-conductive material. The electric excitation mechanism is excited along the circumferential direction, and the magnetic density waveform of the air gap 05 of the permanent magnet poly-magnetic ring 06 is approximately distributed in a sine wave manner, so that a closed magnetic ring is formed. The electric excitation mechanisms are connected with the controller, and under the control of the controller, the electric excitation mechanisms adjust electric excitation current according to the change of the air gaps 05 in each degree of freedom area, control magnetic flux to change magnetic suspension electromagnetic force, realize the feedback control of the concentricity of the magnetic suspension bearing and the motor rotating shaft 04, and achieve the concentric operation of the height of the bearing and the motor rotating shaft 04. The utility model discloses a magnetic suspension bearing need not stator yoke and iron core magnetic pole, and small, light in weight do not have the stator iron and consume. The magnetic suspension bearing requires small electric excitation power, high efficiency and large electromagnetic buoyancy, and is suitable for a high-speed motor transmission system.
As shown in fig. 1, the permanent magnet focusing ring 06 includes a first focusing ring 21, a second focusing ring 22, a third focusing ring 23, and a fourth focusing ring 24. The electricity mechanism of exciting includes that the first mechanism of exciting 31, the second mechanism of exciting 32, the third mechanism of exciting 33 and the fourth mechanism of exciting 34, the utility model discloses a radial four degrees of freedom Halbach array gathers magnetic ring magnetic suspension bearing. The first magnetism gathering ring 21 and the third magnetism gathering ring 23 are arranged oppositely, the magnetizing directions of the first magnetism gathering ring 21 and the third magnetism gathering ring 23 face the rotor, the second magnetism gathering ring 22 and the fourth magnetism gathering ring 24 are arranged oppositely, and the magnetizing directions of the second magnetism gathering ring 22 and the fourth magnetism gathering ring 24 face the mounting cylinder 02. The first excitation mechanism 31 is arranged opposite to the third excitation mechanism 33, the second excitation mechanism 32 is arranged opposite to the fourth excitation mechanism 34, the first excitation mechanism 31 is arranged between the first magnetism gathering ring 21 and the second magnetism gathering ring 22, the second excitation mechanism 32 is arranged between the second magnetism gathering ring 22 and the third magnetism gathering ring 23, the third excitation mechanism 33 is arranged between the third magnetism gathering ring 23 and the fourth magnetism gathering ring 24, and the fourth excitation mechanism 34 is arranged between the fourth magnetism gathering ring 24 and the first magnetism gathering ring 21. The first excitation mechanism 31 and the third excitation mechanism 33 are excited in the same direction, the second excitation mechanism 32 and the fourth excitation mechanism 34 are excited in the same direction, and the first excitation mechanism 31 and the second excitation mechanism 32 are excited in the opposite direction.
As shown in fig. 1, the first magnetic flux gathering ring 21, the second magnetic flux gathering ring 22, the third magnetic flux gathering ring 23, and the fourth magnetic flux gathering ring 24 each include a first permanent magnet, a second permanent magnet, a third permanent magnet, and a fourth permanent magnet, which are connected in sequence. The first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet are all arranged on the inner side wall of the installation cylinder 02. The first permanent magnet and the fourth permanent magnet are magnetized along the diagonal direction, the second permanent magnet and the third permanent magnet are magnetized along the radial direction, the second permanent magnet and the third permanent magnet are located between the first permanent magnet and the fourth permanent magnet, and a magnetic isolating block 07 is arranged between the second permanent magnet and the third permanent magnet. The permanent magnet poly-magnetic ring 06 is uniformly divided into four degree of freedom regions from the I to the IV through the magnetic isolating block 07, and the respective degree of freedom regions have the same structure. The magnetic circuits of the freedom degree areas are independent, no interval electromagnetic coupling exists, the closed circuit direction of the permanent magnet magnetic force lines of the first freedom degree area and the third freedom degree area is anticlockwise, the direction of the permanent magnet magnetic force lines of the second freedom degree area and the fourth freedom degree area is clockwise, and the direction of the electrically excited magnetic force lines of each area is the same as that of the closed circuit magnetic force lines of the permanent magnet of the area. The magnetic lines of force of the permanent magnets with four degrees of freedom of the magnetic suspension magnet gathering ring are inwardly gathered, and the magnetic field of the air gap 05 is distributed in an approximately sine wave shape. The magnetic force lines in the outer direction of the magnet gathering ring are very little and can be regarded as zero. The magnetic isolating block 07 is made of non-magnetic conducting material and is positioned between the permanent magnets which are magnetized inwards and outwards in the radial direction. The magnetic isolation blocks 07 are boundary lines of the freedom degree regions, and play a role in enhancing electromagnetic buoyancy of each region, reducing dynamic interference of each freedom degree region and contributing to improving stability of the system.
Fig. 3 is the schematic structural diagram of the Halbach array magnetic flux collecting ring magnetic suspension bearing of the present invention, as shown in fig. 3, the first excitation mechanism 31, the second excitation mechanism 32, the third excitation mechanism 33 and the fourth excitation mechanism 34 all include the excitation soft magnetic core 09 and the excitation winding 08. The excitation soft magnetic core 09 is arranged on the inner side wall of the installation cylinder 02, the excitation winding 08 is wound on the excitation soft magnetic core 09, and the excitation winding 08 is connected with the controller. The field winding 08 of the first field mechanism 31 is a1a2, the field winding 08 of the second field mechanism 32 is d1d2, the field winding 08 of the third field mechanism 33 is c1c2, and the field winding 08 of the fourth field mechanism 34 is b1b 2. The excitation soft magnetic cores 09 are arc-shaped, the central lines of the plurality of excitation soft magnetic cores 09 in the length direction are located on the circumference of the same circumference, and the circle centers of the circles are overlapped with the circle center of the circle in the installation cylinder 02, so that the electric excitation mechanism is ensured to be excited in the circumferential direction of the installation cylinder 02.
Fig. 2 is the utility model discloses a Halbach array gathers magnetic ring magnetic suspension bearing's axial sectional structure shows, as shown in fig. 2, the rotor includes that pivot 04 and fixed cover establish the rotor core 03 in pivot 04. The rotor core 03 is sleeved in the mounting cylinder 02, and the rotor core 03 can rotate in the mounting cylinder 02. The rotor core 03 is formed by stamping and laminating silicon steel strips, and the outer cylindrical surface of the rotor core 03 is toothless and slotless, thereby providing smooth paths for magnetic fields in respective free ranges and being a bearing body of electromagnetic buoyancy. The thickness of the rotor core 03 is larger than that of the permanent magnet gathering ring 06, and the extension part of the rotor core is used for the displacement sensor 13 to detect the length of the bearing air gap 05.
As shown in fig. 2, the Halbach array magnetic flux collecting ring magnetic suspension bearing further includes a bearing housing 01, a first end cap 11 and a second end cap 12. Wherein, the bearing housing 01 is located to the fixed cover of installation section of thick bamboo 02 forms fixed knot and constructs, first end cover 11 and second end cover 12 respectively with the both ends one-to-one fixed connection of bearing housing 01, the first end of pivot 04 rotates through lubricated bearing and connects first end cover 11, the second end of pivot 04 rotates through lubricated bearing and connects second end cover 12. The utility model discloses an among the suspension bearing, bearing housing 01, first end cap 11 and second end cap 12 are made by non-magnetic material, reduce the magnetism and decrease, reduce the interference, are of value to the stability that improves the system.
Fig. 4 is the utility model discloses a flow diagram of Halbach array gathers magnetic ring magnetic suspension bearing's controller, fig. 5 is the utility model discloses a Halbach array gathers magnetic ring magnetic suspension bearing's electric excitation power circuit connection picture, as shown in fig. 4 and fig. 5, the controller includes microprocessor 14 and a plurality of power circuit 18, and every electric excitation mechanism all connects microprocessor 14 through a power circuit 18, is equipped with communication interface 20 on the microprocessor 14. The power circuit 18 which adopts a single-phase asymmetric H bridge as excitation comprises a first power tube T1, a second power tube T2, a first diode D1 and a second diode D2, wherein the first power tube T1, an excitation winding 08 and a second power tube T2 are sequentially connected in series. A first diode D1 is connected in parallel to the series circuit of the first power transistor T1 and the field winding 08, and the cathode of the first diode D1 is connected to the anode of the power supply. The second diode D2 is connected in parallel to the series circuit of the field winding 08 and the second power transistor T2, and the anode of the second diode D2 is connected to the cathode of the power supply. In the power circuit 18, the second power transistor T2 operates in a switching state, and the single pulse drives the second power transistor T2. The first power tube T1 is used as an electric excitation current adjusting tube, and the first power tube T1 is driven by PWM pulse width. The microprocessor 14 in the controller is a core component, and the controller completes parameter setting and air gap 05 displacement acquisition under the support of the interface component, outputs PWM pulse width modulation information, performs intelligent PID closed-loop calculation, accurately controls the electromagnetic buoyancy of each degree of freedom, and realizes the stable operation of the transmission system.
As shown in fig. 4, Halbach array gathers magnetic ring magnetic suspension bearing and still includes a plurality of displacement sensor 13 and amplifier, and each degree of freedom corresponds and sets up in a displacement sensor 13, the utility model discloses have four degrees of freedom, need set up four displacement sensor 13, four displacement sensor 13 two liang of relative settings. A plurality of displacement sensors 13 are uniformly arranged on the mounting cylinder 02, the displacement sensors 13 are used for detecting the distance between the extension part of the rotor core 03 and the permanent magnet magnetism-gathering ring 06, and the displacement sensors 13 are connected with the microprocessor 14 through an amplifier. The two opposite displacement sensors 13 are connected to the same differential amplifier 17, and input to the microprocessor 14 after data comparison and amplification are performed by the differential amplifier 17, so as to judge whether the rotor core 03 is in the middle position. If not, the excitation power of the smaller degree of freedom region of the air gap 05 is increased. According to the characteristic that a permanent magnet can be magnetized in any direction, multiple sections of permanent magnet sections with required body sizes and magnetizing directions are adopted, and four-freedom-degree poly-magnetic ring bodies with inward magnetic force lines, namely the I-freedom-degree region and the III-freedom-degree region, identical in structure and the II-freedom-degree region and the IV-freedom-degree region, identical in structure are built according to a Halbach array structure. The four respective degree of freedom zones i, ii, iii and iv each comprise four permanent magnets and an excitation mechanism, as shown in fig. 1, the first degree of freedom zone comprises: the third permanent magnet block and the fourth permanent magnet block in the first magnetism gathering ring 21, the first permanent magnet block and the second permanent magnet block in the second magnetism gathering ring 22, and the first excitation mechanism 31 positioned between the first magnetism gathering ring 21 and the second magnetism gathering ring 22; the second degree of freedom region includes: the third permanent magnet block and the fourth permanent magnet block in the fourth magnetism gathering ring 24, the first permanent magnet block and the second permanent magnet block in the first magnetism gathering ring 21, and the fourth excitation mechanism 34 positioned between the first magnetism gathering ring 21 and the fourth magnetism gathering ring 24; the III degree of freedom region includes: a third permanent magnet and a fourth permanent magnet in the third magnetism gathering ring 23, a first permanent magnet and a second permanent magnet in the fourth magnetism gathering ring 24, and a third excitation mechanism 33 between the third magnetism gathering ring 23 and the fourth magnetism gathering ring 24; the IV degree of freedom region includes: a third permanent magnet block and a fourth permanent magnet block in the second focusing ring 22, a first permanent magnet block and a second permanent magnet block in the third focusing ring 23, and a second excitation mechanism 32 positioned between the second focusing ring 22 and the third focusing ring 23; and a magnetic isolating block 07 is arranged on each freedom degree dividing line. The manufacturing method of the excitation windings 08 in all the areas is the same, and the same wire diameter and the same number of turns are adopted. After the electric excitation bodies in each degree of freedom area are electrified and excited, the excitation magnetic lines of the electric excitation bodies are in the same direction as the magnetic lines of the permanent magnets in each area. The closed magnetic lines of force in the I and III freedom degree areas are in the anticlockwise direction, and the magnetic lines of force in the II and IV freedom degree areas are in the clockwise direction. The electro-magnetic magnetomotive force of each area is in positive series connection with the permanent magnet magnetomotive force. Under the support of controller software, the method completes initial data setting, collects displacement of each zone air gap 05, self-tuning operation parameters, calculates closed-loop control PWM pulse width, outputs control information and related alarm information, and achieves displacement negative feedback closed-loop control.
The middle arc section of each degree of freedom is provided with an electric excitation mechanism, and the magnetic force lines of each excitation magnetic field are in the same direction as the magnetic force lines of the region of the degree of freedom. According to the feedback of the air gap 05 position of each degree of freedom area, the exciting current is adjusted, the electromagnetic buoyancy of the degree of freedom area is changed, and the automatic adjustment and the automatic balance of the concentricity of the bearing are realized. In the electric excitation link of each degree of freedom zone, an asymmetric single-phase H bridge is used as a power circuit 18, when the flux density of a permanent magnet is selected, the flux density of the permanent magnet in the electric excitation iron core is not more than or equal to 0.7 times of the rated flux density of the electric excitation iron core, and the rated flux density of the electric excitation iron core is generally selected. In the electric excitation link, in the automatic regulation and control process, the magnetic density of the iron core does not exceed the rated magnetic density of the electric excitation iron core. The design target that the air gap 05 magnetic flux density waveform is a sine wave is used, the thickness and the length of each section of the permanent magnet in the degree of freedom area are calculated, the permanent magnet sections are properly increased, the purpose that the air gap 05 magnetic flux density of each degree of freedom area of the bearing is a sine wave is achieved, the fundamental wave magnetomotive force is large, the electromagnetic buoyancy harmonic component is few, the utilization rate of the magnetic energy product is high, and the bearing stability is good.
According to the characteristic that the permanent magnet can be magnetized in any direction, a plurality of sections of permanent magnet sections with required body sizes and magnetizing directions are adopted, and a magnetic gathering ring with inward magnetic lines of force is constructed according to a Halbach array. The Halbach array gathers the outer magnetic line of force of magnetic ring very little (nearly zero), and the magnetic line of force concentrates on the intra-annular, the utility model discloses the bearing need not stator core, and no stator iron consumes, gathers the magnetic ring and equally divides into four degree of freedom districts, under the effect of magnetism isolating block 07, each degree of freedom district magnetic circuit is independent, no interval coupling influence, and dynamic immunity is strong, and controllability and stability are good. Each degree of freedom zone is provided with an electric excitation body which is controlled by a controller, so that an automatic control system for controlling the displacement of the adjustable air gap 05 by mainly using the permanent magnet and by secondarily using the electric excitation body is realized. The air gap 05 magnetic flux density is used as a sine wave, the thickness and the length of each section of permanent magnet in the calculation area are calculated, and the permanent magnet sections are properly increased, so that the air gap 05 magnetic flux density is the sine wave, the electromagnetic buoyancy harmonic component is less, the magnetomotive force fundamental component is large, the magnetic energy product utilization rate is high, and the system stability is good. The magnetic suspension bearing based on the Halbach array magnetic gathering ring has the advantages of large electromagnetic buoyancy, low energy consumption, good controllability and stability, and is suitable for high-speed and high-silence transmission occasions and the like.
In the description of the present invention, it is to be understood that 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 implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more 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; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless otherwise expressly stated or limited, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.
In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that modifications, alterations, substitutions and variations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A Halbach array magnetic ring-gathering magnetic suspension bearing is characterized by comprising:
the permanent magnet excitation device comprises an installation cylinder, a rotor, a controller, a plurality of electric excitation mechanisms and a plurality of permanent magnet magnetic gathering rings;
the rotor is sleeved in the mounting cylinder, and can rotate in the mounting cylinder;
the plurality of electric excitation mechanisms are uniformly arranged on the inner side wall of the mounting cylinder and are excited along the circumferential direction of the mounting cylinder;
the permanent magnet gathering rings are uniformly arranged on the inner side wall of the mounting cylinder, and the permanent magnet gathering rings and the electric excitation mechanisms are sequentially and alternately distributed;
the plurality of electrically excited actuating mechanisms are each connected to the controller.
2. The Halbach array flux ring magnetic suspension bearing of claim 1, wherein the permanent magnet flux ring comprises a first flux ring, a second flux ring, a third flux ring, and a fourth flux ring;
the electrical excitation mechanism comprises a first excitation mechanism, a second excitation mechanism, a third excitation mechanism and a fourth excitation mechanism;
the first magnetism gathering ring and the third magnetism gathering ring are arranged oppositely, the second magnetism gathering ring and the fourth magnetism gathering ring are arranged oppositely, the magnetizing directions of the first magnetism gathering ring and the third magnetism gathering ring face to the rotor, and the magnetizing directions of the second magnetism gathering ring and the fourth magnetism gathering ring face to the mounting cylinder;
the first excitation mechanism is disposed opposite to the third excitation mechanism, and the second excitation mechanism is disposed opposite to the fourth excitation mechanism.
3. The Halbach array flux ring magnetic suspension bearing of claim 2, wherein the first flux ring, the second flux ring, the third flux ring, and the fourth flux ring each comprise: the first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet are sequentially connected;
the first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet are all arranged on the inner side wall of the mounting cylinder;
the first permanent magnet and the fourth permanent magnet are magnetized along the diagonal direction, the second permanent magnet and the third permanent magnet are magnetized along the radial direction, and a magnetic isolating block is arranged between the second permanent magnet and the third permanent magnet.
4. The Halbach array flux ring magnetic levitation bearing of claim 2, wherein the first excitation mechanism, the second excitation mechanism, the third excitation mechanism, and the fourth excitation mechanism each comprise: an electrically excited soft magnetic core and an excitation winding;
the electric excitation soft magnetic iron core is arranged on the inner side wall of the installation cylinder, and the excitation winding is wound on the electric excitation soft magnetic iron core;
the excitation winding is connected with the controller.
5. The Halbach array flux ring magnetic suspension bearing according to claim 1, wherein the mounting cylinder is made of a non-magnetically conductive material.
6. The Halbach array flux ring magnetic suspension bearing according to any one of claims 1 to 5, wherein the rotor comprises:
the rotating shaft and a rotor iron core fixedly sleeved on the rotating shaft; the rotor core is sleeved in the mounting cylinder.
7. The Halbach array flux ring magnetic suspension bearing of claim 6, wherein the thickness of the rotor core is greater than the thickness of the permanent magnet flux ring.
8. The Halbach array flux ring magnetic suspension bearing of claim 6, further comprising:
the bearing comprises a bearing shell, a first end cover and a second end cover;
the bearing shell is fixedly sleeved on the mounting cylinder, the first end cover and the second end cover are respectively and fixedly connected with two ends of the bearing shell in a one-to-one correspondence manner, and two ends of the rotating shaft are respectively and rotatably connected with the first end cover and the second end cover in a one-to-one correspondence manner;
the bearing housing, the first end cap, and the second end cap are all made of a non-magnetic material.
9. The Halbach array flux ring magnetic suspension bearing according to any one of claims 1 to 5, wherein the controller comprises a microprocessor and a plurality of power circuits;
each of the electrically excited magnetic mechanisms is connected to the microprocessor through one of the power circuits.
10. The Halbach array flux ring magnetic suspension bearing of claim 9, further comprising: a plurality of displacement sensors and amplifiers;
the displacement sensors are uniformly arranged on the mounting cylinder and are used for detecting the distance between the permanent magnet gathering ring and the rotor; the displacement sensor is connected with the microprocessor through the amplifier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120048045.1U CN214424915U (en) | 2021-01-08 | 2021-01-08 | Halbach array magnetic-gathering ring magnetic suspension bearing |
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| CN202120048045.1U CN214424915U (en) | 2021-01-08 | 2021-01-08 | Halbach array magnetic-gathering ring magnetic suspension bearing |
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| CN214424915U true CN214424915U (en) | 2021-10-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114400801A (en) * | 2021-12-31 | 2022-04-26 | 杭州东博自动化科技有限公司 | Motor magnetic ring based on Halbach arrangement |
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2021
- 2021-01-08 CN CN202120048045.1U patent/CN214424915U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114400801A (en) * | 2021-12-31 | 2022-04-26 | 杭州东博自动化科技有限公司 | Motor magnetic ring based on Halbach arrangement |
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