CN117424364A - Stator structure and magnetic suspension stirrer - Google Patents

Stator structure and magnetic suspension stirrer Download PDF

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Publication number
CN117424364A
CN117424364A CN202311375861.3A CN202311375861A CN117424364A CN 117424364 A CN117424364 A CN 117424364A CN 202311375861 A CN202311375861 A CN 202311375861A CN 117424364 A CN117424364 A CN 117424364A
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CN
China
Prior art keywords
magnetic
stator
permanent magnet
driving device
housing
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.)
Pending
Application number
CN202311375861.3A
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Chinese (zh)
Inventor
请求不公布姓名
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Kaici Intelligent Technology Research Institute Co ltd
Chongqing Kaici Medical Technology Co ltd
Original Assignee
Chongqing Kaici Intelligent Technology Research Institute Co ltd
Chongqing Kaici Medical Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chongqing Kaici Intelligent Technology Research Institute Co ltd, Chongqing Kaici Medical Technology Co ltd filed Critical Chongqing Kaici Intelligent Technology Research Institute Co ltd
Priority to CN202311375861.3A priority Critical patent/CN117424364A/en
Publication of CN117424364A publication Critical patent/CN117424364A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/32005—Type of drive
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

The utility model relates to a magnetic suspension motor technical field specifically provides a stator structure and magnetic suspension agitator, the stator structure includes the casing, first magnetism drive arrangement and second magnetism drive arrangement, the casing has first accommodation space, first magnetism drive arrangement and second magnetism drive arrangement distribute in first accommodation space along the axial of casing, and first magnetism drive arrangement is located the distal end of second magnetism drive arrangement, first magnetism drive arrangement includes a plurality of first stator winding, a plurality of first stator winding distributes along the circumference of casing, in order to produce first rotating magnetic field, second magnetism drive arrangement includes a plurality of second stator winding, a plurality of second stator winding distributes along the circumference of casing, in order to produce second rotating magnetic field, a plurality of second stator winding's diameter of distribution is greater than a plurality of first stator winding's diameter of distribution, above-mentioned scheme can promote the stability of the external rotor structure of magnetic suspension agitator when stirring operation.

Description

Stator structure and magnetic suspension stirrer
Technical Field
The invention belongs to the technical field of magnetic suspension motors, and particularly relates to a stator structure and a magnetic suspension stirrer.
Background
In the manufacturing process of pharmaceuticals, the following problems often occur with conventional agitators:
the first and mechanical bearings need to be in physical contact, so friction and abrasion can be generated, abrasive particles generated by friction enter the medicine, and the purity and quality of the medicine can be influenced;
secondly, the preparation of some special medicines is carried out under the low-temperature condition, and the energy loss generated by friction causes the whole stirrer to generate more obvious heat, thereby affecting the activity of the medicines;
third, to reduce friction and wear, conventional agitators often require the use of lubricants that may penetrate the medicament causing contamination and affecting the safety and effectiveness of the medicament.
In summary, the use of conventional agitators may cause a series of problems such as contamination of the medicament, energy loss and heat generation. In view of this, there are some magnetic levitation stirrers in the related art to eliminate the above-mentioned problems of the conventional stirrer, but the inventors have found that the magnetic levitation stirrer in the related art has a technical problem of poor stability in operation, resulting in difficulty in effective stirring of medicines.
Disclosure of Invention
The invention discloses a stator structure and a magnetic suspension stirrer, which are used for solving the technical problem of poor stirring stability of the magnetic suspension stirrer in the related art.
In order to solve the problems, the invention adopts the following technical scheme:
in a first aspect, the present application provides a stator structure for a magnetic levitation stirrer, the stator structure comprising a housing, a first magnetic drive device and a second magnetic drive device; wherein:
the shell is provided with a first accommodating space, the first magnetic driving device and the second magnetic driving device are distributed in the first accommodating space along the axial direction of the shell, and the first magnetic driving device is positioned at the far end of the second magnetic driving device;
the first magnetic driving device comprises a plurality of first stator windings, and the plurality of first stator windings are distributed along the circumferential direction of the shell so as to generate a first rotating magnetic field;
the second magnetic driving device comprises a plurality of second stator windings, the second stator windings are distributed along the circumferential direction of the shell to generate a second rotating magnetic field, and the distribution diameter of the second stator windings is larger than that of the first stator windings.
Further, the first stator winding comprises a first stator iron core and a first stator coil, the first stator coil is wound on the outer side of the first stator iron core, and the axial direction of the first stator coil is coincident with the axial direction of the shell.
Further, the second stator winding comprises a second stator core and a second stator coil, the second stator coil is wound on the outer side of the second stator core, and the axial direction of the second stator coil is coincident with the axial direction of the shell.
Further, the first accommodation space comprises a first accommodation cavity and second accommodation cavities distributed at the proximal end of the first accommodation cavity, the opening size of the second accommodation cavity is larger than that of the first accommodation cavity, so that the shell forms a step wall between the first accommodation cavity and the second accommodation cavity, the first magnetic driving device is arranged on the top wall of the shell, and the second magnetic driving device is arranged on the step wall.
Further, the top wall of the housing is provided with a mounting hole communicated with the first accommodating space, the housing is further provided with a baffle wall surrounding the mounting hole on the outer side of the top wall of the housing, and the baffle wall defines a detection module mounting cavity on the inner side of the baffle wall.
Further, the stator structure further comprises a detection module, the detection module comprises a control unit, an axial displacement detection unit and a first rotation detection unit, the control unit is arranged in the installation cavity of the detection module, and the axial displacement detection unit and/or the first rotation detection unit are/is connected with the control unit.
The axial displacement detection unit is used for detecting the axial displacement of the outer rotor structure, the control unit controls the first magnetic driving device and/or the second magnetic driving device to readjust the outer rotor structure to a designated position under the condition that the axial displacement of the outer rotor structure exceeds a preset value, and the first rotation detection unit is used for detecting the rotation displacement and/or the rotation speed of the outer rotor structure.
In a second aspect, the present application provides a magnetic levitation stirrer, the magnetic levitation stirrer comprising an outer rotor structure and the stator structure, the outer rotor structure comprising an impeller, a first permanent magnet and a second permanent magnet; wherein:
the impeller comprises a base and a blade connected with the base, and the first permanent magnet and the second permanent magnet are both arranged in the base; the first permanent magnet corresponds to the first magnetic driving device, and the first permanent magnet and the first magnetic driving device are distributed in the axial direction of the shell; the second permanent magnet corresponds to the second magnetic driving device, and the second permanent magnet and the second magnetic driving device are distributed in the axial direction of the shell.
Further, the magnetic suspension stirrer further comprises a passive magnetic suspension assembly, the passive magnetic suspension assembly comprises a third permanent magnet and a fourth permanent magnet, the third permanent magnet is arranged on the shell, the fourth permanent magnet is arranged on the base, and the third permanent magnet corresponds to the fourth permanent magnet.
Further, in the axial direction of the housing, the extension length of the third permanent magnet is larger than the extension length of the fourth permanent magnet.
Further, in the axial direction of the housing, the passive magnetic levitation assembly is disposed between the first magnetic driving device and the second magnetic driving device.
Further, an induction piece corresponding to the axial displacement detection unit is arranged in the base.
The technical scheme adopted by the invention can achieve the following beneficial effects:
the first magnetic driving device is used for generating a first magnetic field, and the first magnetic driving device is used for generating a second magnetic field;
the second magnetic suspension system, the first magnetic suspension system and the second magnetic suspension system cooperate to provide larger bearing capacity, can handle larger stirring load, is suitable for treating high-viscosity liquid or application requiring stronger stirring force, and can stably rotate even if external resistance applied to the outer rotor structure during stirring is increased;
one of the third magnetic driving device and the first magnetic driving device and the second magnetic driving device can work cooperatively to further correct the axial deflection and/or the radial deflection of the outer rotor structure under the condition that the axial deflection and/or the radial deflection of the outer rotor structure cannot be completely eliminated, and the control capability and the control flexibility of the outer rotor structure are obviously enhanced;
and the diameter of the fourth rotating magnetic field is smaller than that of the second rotating magnetic field, when the stator structure and the outer rotor structure are assembled, the second iron core in the second magnetic driving device is not easy to generate magnetic acting force with the first permanent magnet in the impeller, and the second magnetic driving device can easily pass through the axial position of the first permanent magnet to correspond to the second permanent magnet to form a second magnetic suspension system, so that the magnetic suspension system has the characteristics of convenience in installation, adjustment or replacement.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is one of the schematic structural diagrams of a magnetic levitation stirrer according to an embodiment of the present application;
FIG. 2 is a second schematic diagram of a magnetic levitation stirrer according to an embodiment of the present application;
FIG. 3 is an enlarged partial schematic view at A in FIG. 2;
FIG. 4 is a schematic structural view of a housing according to an embodiment of the present application;
FIG. 5 is an assembled schematic view of a stator structure of an embodiment of the present application;
fig. 6 is a schematic structural view of a stator structure of an embodiment of the present application;
FIG. 7 is an enlarged partial schematic view at B in FIG. 6;
fig. 8 is one of structural schematic diagrams of an outer rotor structure of an embodiment of the present application;
fig. 9 is a second schematic structural view of the outer rotor structure according to the embodiment of the present application.
In the figure:
100. a housing; 110. a first accommodation space; 111. a first accommodation chamber; 112. a second accommodation chamber; 113. a step wall; 120. a mounting aperture; 130. a retaining wall; 140. a detection module mounting cavity; 150-Hall mounting grooves; 210. a first stator winding; 211. a first stator core; 212. a first stator coil; 310. a second stator winding; 311. a second stator core; 312. a second stator coil; 400. a detection module; 410. a control unit; 420. an axial displacement detection unit; 430. a first rotation detecting unit; 500. an impeller; 510. a base; 511. a first mounting portion; 512-a second mounting portion; 513. a connection part; 510a, a receiving cavity; 520. a paddle; 600. a first permanent magnet; 700. a second permanent magnet; 800. a passive magnetic levitation assembly; 810. a third permanent magnet; 820. a fourth permanent magnet; 900. a spacer ring; 1000. and the induction piece.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
In addition, in the invention, the 'near end' and the 'far end' are far and near positions of the structure relative to an external operator under the use environment, so that the description of the position relationship among the components is convenient, and meanwhile, the understanding is convenient; for the same component, "proximal" and "distal" are relative positional relationships of the component, not absolute; accordingly, it should be understood from the perspective of implementing the principles of the present invention without departing from the spirit of the invention.
The inventor finds that in the research process, in the production and manufacturing process of medicines, certain medicines have the characteristics of high viscosity, high density, high particle content and the like, the characteristics can increase the resistance applied to the stirring of the magnetic suspension stirrer, change the posture of an outer rotor structure of the stirring magnetic suspension stirrer, ensure that the magnetic force cannot be stably transmitted to the outer rotor structure, lead to the poor stirring stability of the magnetic suspension stirrer, and lead the outer rotor structure to be deviated, stalled or even axially separated.
The stator structure and the magnetic suspension stirrer provided in the embodiments of the present application are described in detail below with reference to fig. 1 to 9 by means of specific embodiments and application scenarios thereof.
Referring to fig. 1-2, an embodiment of the present application discloses a magnetic levitation stirrer, which includes a stator structure and an outer rotor structure, wherein the stator structure and the outer rotor structure can generate magnetic force to drive the outer rotor structure to levitate and rotate.
Referring to fig. 3 to 5, the stator structure includes a housing 100, a first magnetic driving device and a second magnetic driving device, where the housing 100 is a base member of the stator structure, and is capable of providing a mounting base for the first magnetic driving device and the second magnetic driving device, and the first magnetic driving device and the second magnetic driving device are distributed in the housing 100 along an axial direction of the housing 100.
Specifically, referring to fig. 3, the case 100 has a first receiving space 110, the first receiving space 110 includes a first receiving cavity 111 and second receiving cavities 112 distributed at a proximal end of the first receiving cavity 111, and an opening size of the second receiving cavity 112 is larger than an opening size of the first receiving cavity 111, such that the case 100 forms a stepped wall 113 between the first receiving cavity 111 and the second receiving cavity 112. The first magnetic driving device is located in the first accommodating cavity 111, and can take the top wall of the first accommodating cavity 111 as a bearing basis, and the second magnetic driving device is located in the second accommodating cavity 112, and can take the step wall 113 as a bearing basis, so that the first magnetic driving device and the second magnetic driving device can be coaxially distributed in the housing 100.
Referring to fig. 4 and 5, the first magnetic driving device includes a plurality of first stator windings 210, each stator winding 210 includes a first stator core 211 and a first stator coil 212, the first stator coils 212 are wound on the outer side of the first stator core 211, the plurality of first stator windings 210 are distributed along the circumferential direction of the housing 100, and when the first stator coils 212 are energized with three-phase alternating current, the plurality of first stators are overlapped with the axial direction of the housing 100 around the axial direction of the first stator coils 212, and the group 210 jointly generates a first rotating magnetic field rotating around the axial direction of the housing 100.
With continued reference to fig. 4, the second magnetic driving device includes a plurality of second stator windings 310, each second stator winding 310 includes a second stator core 311 and a second stator coil 312, the second stator coil 312 is wound on the outer side of the second stator core 311, the axial direction of the second stator coil 312 coincides with the axial direction of the housing 100, the plurality of second stator windings 310 are distributed along the circumferential direction of the housing 100, and under the condition that the second stator coil 312 is energized with three-phase alternating current, the plurality of second stator windings 310 jointly generate a second rotating magnetic field rotating around the axial direction of the housing 100.
Based on the above technical solution, the first magnetic driving device corresponds to the first permanent magnet 600 in the axial direction of the housing 100, and the second magnetic driving device corresponds to the second permanent magnet 700 in the axial direction of the housing 100, where the axial correspondence can provide a highly stable axial support, so that the impeller 500 has less vibration and deformation in the working process, which is helpful to maintain the balance and the running stability of the magnetic suspension stirrer, and improve the capability of the magnetic suspension stirrer to bear a larger stirring load.
It should be understood that, in the embodiment of the present application, the opening size of the second accommodating cavity 112 is larger than the opening size of the first accommodating cavity 111 to form the step wall 113, so as to facilitate the assembly and fixation of the first magnetic driving device and the second magnetic driving device with the housing 100, for example, the first magnetic driving device and the second magnetic driving device may be sequentially installed in the housing 100 from the proximal opening of the second accommodating cavity 112, so as to improve the convenience of assembly. In this case, the distribution diameter of the plurality of second stator windings 310 is larger than the distribution diameter of the plurality of first stator windings 210, i.e., the diameter of the second rotating magnetic field is larger than the diameter of the first rotating magnetic field.
In the embodiment of the present application, referring to fig. 1, 7 and 8, the outer rotor structure includes an impeller 500, a first permanent magnet 600 and a second permanent magnet 700, and both the first permanent magnet 600 and the second permanent magnet 700 are disposed in the impeller 500.
Referring to fig. 7 and 8, the impeller 500 includes a base 510 and a blade 520 connected to the base 510, the base 510 has a first mounting portion 511 and a second mounting portion 512 connected to the first mounting portion 511, the first mounting portion 511 and the second mounting portion 512 are distributed along an axial direction of the impeller 500, the first mounting portion 511 is distributed at a distal end of the second mounting portion 512 and defines a receiving cavity 510a therebetween, the first permanent magnet 600 is disposed on the first mounting portion 511, the second permanent magnet 700 is disposed on the second mounting portion 512, and a portion of the stator structure can be extended into the receiving cavity 510 a.
In the embodiment of the present application, the second mounting portion 512 is an annular structure extending along the circumferential direction of the impeller 500, the first mounting portion 511 is located at the radial inner side of the second mounting portion 512, and when the stator structure and the outer rotor structure are abutted, the portion of the stator structure, on which the first magnetic driving device is mounted, goes deep into the accommodating cavity 510a, so that the first magnetic driving device corresponds to the first permanent magnet 600 to form a first magnetic suspension system, and the second magnetic driving device located outside the accommodating cavity 510a corresponds to the second permanent magnet 700 to form a second magnetic suspension system.
The first magnetic levitation system and the second magnetic levitation system can respectively suspend and rotate the outer rotor structure relative to the stator structure, and it should be understood that the first magnetic force generated by the first magnetic levitation system and the second magnetic force generated by the second magnetic levitation system are both far greater than the gravity of the impeller 500, so that the gravity of the impeller 500 is negligible.
Based on the above technical scheme, the magnetic suspension stirrer of the embodiment of the application has the advantages that the first rotating magnetic field and the second rotating magnetic field support the outer rotor structure together, on one hand, compared with a single magnetic suspension stirrer which only has one rotating magnetic field to support the rotor, even if the resistance of the outer rotor structure is increased during stirring, the outer rotor structure is not easy to deviate or swing to change the posture, so that the outer rotor structure and the stator structure can be further ensured to have better coaxiality all the time, and magnetic acting force can be stably transferred, so that the stability of the outer rotor structure during stirring operation is higher; on the other hand, the first magnetic suspension system and the second magnetic suspension system cooperate to provide larger bearing capacity, can handle larger stirring load, and are suitable for treating high-viscosity liquid or applications requiring stronger stirring force.
Meanwhile, the magnetic suspension stirrer of the embodiment of the application adopts two sets of magnetic suspension systems to jointly control the suspension and rotation of the outer rotor structure, when the axial deflection and/or the radial deflection occurs due to the fact that the resistance of the outer rotor structure is large, the axial position and/or the radial position of the outer rotor structure can be adjusted by adjusting the magnetic field or the magnetic acting force of one of the first magnetic suspension system and the second magnetic suspension system, and the magnetic suspension stirrer tries to bring the outer rotor structure back to the balance position again so that the axial deflection and/or the radial deflection is reduced or reaches zero. And in the case that the axial offset and/or the radial offset still cannot be completely eliminated, the other one of the first magnetic suspension system and the second magnetic suspension system can start to work, and the first magnetic suspension system and the second magnetic suspension system work cooperatively by adjusting the magnetic field or the magnetic acting force so as to further correct the axial offset and/or the radial offset of the outer rotor structure, that is, the control capability and the control flexibility of the outer rotor structure can be obviously improved by adopting two sets of magnetic suspension systems.
In this embodiment, the magnetic levitation stirrer further includes a passive magnetic levitation assembly 800, referring to fig. 2, 4 and 8, the passive magnetic levitation assembly 800 includes a third permanent magnet 810 and a fourth permanent magnet 820, the third permanent magnet 810 is disposed in the housing 100, the fourth permanent magnet 820 is disposed on the base 510, and the third permanent magnet 810 corresponds to the fourth permanent magnet 820. The passive magnetic levitation assembly 800 does not need an external power supply, can support the outer rotor structure autonomously, can enhance the safety and fault tolerance of the magnetic levitation stirrer, and can continue to support the outer rotor structure to operate when one of the first magnetic driving device and the second magnetic driving device fails or fails.
In the embodiment of the present application, the first magnetic driving device and the first permanent magnet 600 are distributed in the axial direction of the housing 100, and the second magnetic driving device and the second permanent magnet 700 are distributed in the axial direction of the housing 100; under such setting, the external rotor structure can have certain activity margin in the axial direction of casing 100, and when the resistance that external rotor structure received changed, especially under the condition that resistance suddenly increased, the external rotor structure can float in order to adjust the resistance that receives in the axial direction of casing 100, makes the external rotor structure can smooth and easy rotation stirring, avoids appearing that external load is too big to lead to the external rotor structure stall.
In the axial direction of the housing 100, the extension length of the third permanent magnet 810 is longer than that of the fourth permanent magnet 820, and thus, even if the fourth permanent magnet 820 moves in the axial direction, it always corresponds to the third permanent magnet 810, thus allowing the rotor to have a certain axial movement space without excessively restricting the degree of freedom thereof to accommodate the influence of the variation or vibration of the external load.
The third permanent magnet 810 and the fourth permanent magnet 820 may be formed by stacking a plurality of annular magnetic steels, on one hand, each annular magnetic steel generates a magnetic field, and the magnetic fields are stacked together, so that the strength of the magnetic field and the coverage area can be increased, and the magnetic levitation force of the passive magnetic levitation assembly 800 can be increased, and on the other hand, the non-uniformity of the magnetic field can be reduced by stacking a plurality of annular magnetic steels, so that the stability of the passive magnetic levitation assembly 800 is improved.
In some embodiments of the present application, the passive magnetic levitation assembly 800 is disposed between the first magnetic driving device and the second magnetic driving device, and in an alternative embodiment, referring to fig. 8, the seat 510 further includes a connection portion 513 connecting the first mounting portion 511 and the second mounting portion 512, and the aforementioned fourth permanent magnet 820 is disposed in the connection portion 510. This arrangement helps to improve the safety and fault tolerance of the magnetic levitation stirrer, and if one of the first magnetic drive device and the second magnetic drive device fails, the passive magnetic levitation assembly 800 can continue to provide support and stability to avoid unbalanced outer rotor structure and serious failure.
The stator structure of the embodiment of the application further includes a detection module 400, where the detection module 400 is disposed in the housing 100, and the detection module 400 is configured to detect at least one of an axial displacement of the outer rotor structure, a rotational displacement of the outer rotor structure, and a rotational speed of the outer rotor structure. The detection module 400 includes a control unit 410, an axial displacement detection unit 420 and a first rotation detection unit 430, wherein the control unit 410, the axial displacement detection unit 420 and the first rotation detection unit 430 are all disposed in the housing 100, and the axial displacement detection unit 420 and the first rotation detection unit 430 are all connected with the control unit 410.
The axial displacement detection unit 420 is configured to detect an axial displacement of the outer rotor structure, and when the axial displacement of the outer rotor structure exceeds a preset value, the control unit 410 controls the first magnetic driving device and the second magnetic driving device to readjust the outer rotor structure to a specified position.
The first rotation detecting unit 430 is configured to detect a rotational displacement and/or a rotational speed of the outer rotor structure, specifically, the first rotation detecting unit 430 may detect a position of the first permanent magnet 600, the first rotation detecting unit 430 may also detect a magnetic field strength and a direction of the first magnetic driving device, and the control unit 410 may adjust an operating state of the outer rotor structure in the magnetic levitation stirrer in real time according to a detection signal of the first rotation detecting unit 430.
In an alternative embodiment, referring to fig. 4 and 5, the top wall of the housing 100 is provided with a mounting hole 120 communicating with the first accommodating space 110, the housing 100 is further provided with a baffle wall 130 surrounding the mounting hole 120 on the outer side of the top wall, the baffle wall 130 defines a detection module mounting cavity 140 on the inner side thereof, and the diameter of the baffle wall 130 is larger than that of the mounting hole 120, so that the top wall of the housing 100 is formed with a bearing step on the inner side of the baffle wall 130, and the control unit 410 includes a control board which can be disposed in the detection module mounting cavity 140 and is based on the bearing step.
It should be noted that, the control unit 410 may further include a driving board, where the driving board is disposed in the housing 100 and is separated from the control board, so that not only the spatial layout in the stator structure is optimized, but also the signal interference of the driving board to the control board is reduced, and the stability and reliability of the system are improved.
The axial displacement detection unit 420 may be a plurality of first hall sensors or eddy current sensors disposed on the control board, and the sensing element 1000 corresponding to the axial displacement detection unit 420 is disposed in the base 500. Specifically, in the case where the axial displacement detection unit 420 is a first hall sensor, a fifth permanent magnet corresponding to the position of the first hall sensor is provided in the base 510, and in the case where the axial displacement detection unit 420 is an eddy current sensor, a metal conductor corresponding to the eddy current sensor is provided in the base 510. Through measuring the axial displacement of impeller 500, can know the axial position of impeller 500 in real time, and then adjust first rotating magnetic field or second rotating magnetic field to keep suitable clearance, thereby realize stable suspension effect.
In some embodiments of the present application, the sensing element 100 is in an annular configuration, and the accuracy of axial displacement detection can be increased by a plurality of first hall sensors or eddy current sensors distributed in the circumferential direction; in a further technical solution, the annular sensing element 100 is located on the first permanent magnet 600, so as to avoid electromagnetic interference between the two, and ensure the stability of axial displacement detection and the stability of rotation of the outer rotor.
The first rotation detecting unit 430 may be a plurality of second hall sensors distributed along the circumferential direction of the housing 100, specifically, the top wall of the housing 100 is further provided with a hall mounting groove 150, the second hall sensors are disposed in the hall mounting groove 150, and the lead wires of the second hall sensors penetrate through the blocking wall 130 and extend into the detecting module mounting cavity 140, and the distribution diameter of the second hall sensors in the circumferential direction of the housing 100 is the same as the distribution diameter of the first stator windings 210, so that the second hall sensors correspond to the first rotating magnetic field.
In some embodiments of the present application, the detection unit 400 may further include a second rotation detection unit (not shown) corresponding to the second rotating magnetic field, and the second rotation detection unit may include a plurality of third hall sensors corresponding to the second rotating magnetic field, which will not be described herein. The magnetic suspension stirrer of this application embodiment detects rotation displacement and/or rotation speed of external rotor structure through first rotation detecting element and second rotation detecting element jointly, and in the preferred embodiment, first rotation detecting element and second rotation detecting element dislocation distribution in circumference direction can promote the accuracy of external rotor structure rotation gesture monitoring.
In a further technical scheme, an isolating ring 900 is further arranged on the outer side of the shell 100, the isolating ring 900 is arranged between the first magnetic driving device and the first permanent magnet 600 and between the second magnetic driving device and the second permanent magnet 700, and based on the existence of the isolating ring 900, the mutual interference between the magnetic field in the outer rotor structure and the magnetic field in the stator structure can be reduced, so that the normal work of the magnetic suspension stirrer is ensured; at the same time, the spacer 900 can reduce energy loss and noise generation, and improve the efficiency and stability of the stirrer.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention.

Claims (10)

1. A stator structure characterized by comprising a housing (100), a first magnetic drive means and a second magnetic drive means; wherein:
the shell (100) is provided with a first accommodating space (110), the first magnetic driving device and the second magnetic driving device are distributed in the first accommodating space (110) along the axial direction of the shell (100), and the first magnetic driving device is positioned at the far end of the second magnetic driving device;
the first magnetic driving device comprises a plurality of first stator windings (210), and the plurality of first stator windings (210) are distributed along the circumferential direction of the shell (100) so as to generate a first rotating magnetic field;
the second magnetic driving device comprises a plurality of second stator windings (310), wherein the plurality of second stator windings (310) are distributed along the circumferential direction of the shell (100) to generate a second rotating magnetic field, and the distribution diameter of the plurality of second stator windings (310) is larger than that of the plurality of first stator windings (210).
2. The stator structure according to claim 1, characterized in that the first stator winding (210) includes a first stator core (211) and a first stator coil (212), the first stator coil (212) is wound on the outside of the first stator core (211), and the axial direction of the first stator coil (212) coincides with the axial direction of the housing (100);
and/or, the second stator winding (310) comprises a second stator core (311) and a second stator coil (312), the second stator coil (312) is wound on the outer side of the second stator core (311), and the axial direction of the second stator coil (312) is overlapped with the axial direction of the shell (100).
3. The stator structure according to claim 1, characterized in that the first accommodation space (110) includes a first accommodation chamber (111) and a second accommodation chamber (112) distributed at a proximal end of the first accommodation chamber (111), an opening size of the second accommodation chamber (112) being larger than an opening size of the first accommodation chamber (111) so that the housing (100) forms a step wall (113) therebetween, the first magnetic driving means being provided at a top wall of the housing (100), the second magnetic driving means being provided at the step wall (113).
4. A stator structure according to claim 3, characterized in that the top wall of the housing (100) is provided with a mounting aperture (120) communicating with the first accommodation space (110), the housing (100) being further provided with a baffle wall (130) surrounding the mounting aperture (120) on the outside of its top wall, the baffle wall (130) defining a detection module mounting cavity (140) on its inside.
5. The stator structure according to claim 4, characterized in that the stator structure further comprises a detection module (400), the detection module (400) comprising a control unit (410), an axial displacement detection unit (420) and a first rotation detection unit (430), the control unit (410) being arranged in the detection module mounting cavity (140), the axial displacement detection unit (420) and/or the first rotation detection unit (430) being connected to the control unit (410);
the axial displacement detection unit (420) is used for detecting the axial displacement of the outer rotor structure, the control unit (410) controls the first magnetic driving device and/or the second magnetic driving device to readjust the outer rotor structure to a designated position when the axial displacement of the outer rotor structure exceeds a preset value, and the first rotation detection unit (430) is used for detecting the rotation displacement and/or the rotation speed of the outer rotor structure.
6. A magnetic levitation stirrer, characterized by comprising an outer rotor structure and the stator structure of any of claims 1-5, the outer rotor structure comprising an impeller (500), a first permanent magnet (600) and a second permanent magnet (700); wherein:
the impeller (500) comprises a base (510) and a blade (520) connected with the base (510), wherein the first permanent magnet (600) and the second permanent magnet (700) are both arranged in the base (510);
the first permanent magnet (600) corresponds to the first magnetic driving device, and the first permanent magnet (600) and the first magnetic driving device are distributed in the axial direction of the shell (100);
the second permanent magnet (700) corresponds to the second magnetic driving device, and the second permanent magnet (700) and the second magnetic driving device are distributed in the axial direction of the housing (100).
7. The magnetic levitation stirrer of claim 6, further comprising a passive magnetic levitation assembly (800), the passive magnetic levitation assembly (800) comprising a third permanent magnet (810) and a fourth permanent magnet (820), the third permanent magnet (810) being disposed on the housing (100), the fourth permanent magnet (820) being disposed on the base (510), the third permanent magnet (810) corresponding to the fourth permanent magnet (820).
8. The magnetic levitation stirrer of claim 7, wherein the extension length of the third permanent magnet (810) is greater than the extension length of the fourth permanent magnet (820) in the axial direction of the housing (100).
9. The magnetic levitation stirrer of claim 8, wherein the passive magnetic levitation assembly (800) is disposed between the first magnetic drive device and the second magnetic drive device in an axial direction of the housing (100).
10. The magnetic levitation stirrer according to claim 6, wherein an axial displacement detection unit (420) is provided in the stator structure, and an induction member (1000) corresponding to the axial displacement detection unit (420) is provided in the base (510).
CN202311375861.3A 2023-10-23 2023-10-23 Stator structure and magnetic suspension stirrer Pending CN117424364A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311375861.3A CN117424364A (en) 2023-10-23 2023-10-23 Stator structure and magnetic suspension stirrer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311375861.3A CN117424364A (en) 2023-10-23 2023-10-23 Stator structure and magnetic suspension stirrer

Publications (1)

Publication Number Publication Date
CN117424364A true CN117424364A (en) 2024-01-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311375861.3A Pending CN117424364A (en) 2023-10-23 2023-10-23 Stator structure and magnetic suspension stirrer

Country Status (1)

Country Link
CN (1) CN117424364A (en)

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