Tabletop magnetic suspension stirring device

Abstract

The utility model discloses a desktop magnetic suspension stirring device which comprises a magnetic suspension motor, a stirring container and a base, the base comprises a supporting cavity matched with the outer wall of the stirring container, the stirring container is configured to be a rigid container, and the stirring container is contained in the supporting cavity and detachably and fixedly connected with the supporting cavity. A rotor joint part is formed on the bottom wall of the stirring container, a window for avoiding the rotor joint part is formed in the bottom of the supporting cavity, a magnetic suspension rotor of the magnetic suspension motor is arranged in the stirring container and limited by the rotor joint part, and a magnetic suspension stator is arranged on the base and located outside the bottom of the stirring container. The magnetic suspension stator of the magnetic suspension motor is configured to drive the magnetic suspension rotor to suspend and rotate in a non-contact mode. The rigid stirring container of the desktop magnetic suspension stirring device is detachably fixed to the supporting cavity in a storage mode, so that the stirring container is convenient to assemble and disassemble, and the requirements of bearing and fixing in the stirring and uniform mixing process and disassembly of the stirring container for offline sterilization and cleaning are met.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic levitation stirring, in particular to a desktop magnetic levitation stirring device. Background Art

[0002] Magnetic levitation stirring equipment, also known as magnetic levitation stirrers or magnetic levitation mixing systems, has natural advantages in fields such as biopharmaceuticals, semiconductor, and chip manufacturing. Since there is no need for a drive shaft to pass through the container wall to rotate the stirrer, magnetic levitation stirring equipment can eliminate the need to set up a sealing structure between the drive shaft and the container.

[0003] For example, in the process of drug production, it is necessary to stir and mix multiple liquids or a liquid and a powdery solid in a certain proportion. The traditional mixing method is to set up a stirring head in a stainless steel liquid storage tank, and multiple liquids or a liquid and a powdery solid are directly put into the stainless steel liquid storage tank. After mixing, it is necessary to perform online cleaning and sterilization operations on the stainless steel liquid storage tank. Currently, compared with traditional stainless steel liquid storage tanks, the disposable liquid storage bag process is becoming more and more common in the biopharmaceutical industry due to its flexibility, lower cleaning and maintenance costs, and lower risk of cross-contamination. The magnetic levitation stirring equipment adapted to the disposable liquid storage bag process includes a magnetic levitation motor and a rigid support cylinder. The disposable liquid storage bag is usually a flexible bag and is arranged in the rigid support cylinder. The magnetic levitation motor (magnetic levitation stator) is usually installed on a mobile trolley. The magnetic levitation motor of a single mobile trolley corresponds to the stirring and mixing of multiple support cylinders, and the magnetic levitation motor is arranged outside the closed disposable liquid storage bag and drives the magnetic levitation rotor arranged inside the closed disposable liquid storage bag to levitate and rotate in a non-contact manner, so as to achieve the purpose of non-contact stirring and mixing. In this way, when the magnetic levitation motor is installed in place following the mobile trolley, the mixing and stirring of the disposable liquid storage bag can be realized; when the magnetic levitation motor is removed, the disposable liquid dispensing bag can be used for storing and transporting materials.

[0004] Existing magnetic levitation stirring equipment is usually relatively large and suitable for the mixing and stirring of large-volume liquid media. The too-large minimum working volume results in a large residual volume of drained liquid in the disposable liquid dispensing system, which is not suitable for some processes in the production processes of vaccines, nucleic acids, plasmids, viruses, etc. There is an urgent need for a small-volume desktop magnetic levitation stirring device that is convenient for sterilization and cleaning. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the embodiment of the utility model provides a desktop magnetic levitation stirring device, which is used to solve at least one of the above problems.

[0006] An embodiment of the present disclosure provides a desktop magnetic levitation stirring device, which includes a magnetic levitation motor, a stirring container, and a base. The base includes a support cavity adapted to the outer wall of the stirring container. The stirring container is configured as a rigid container. The stirring container is accommodated in the support cavity and is detachably and fixedly connected to the support cavity. A rotor engagement portion is formed on the bottom wall of the stirring container, and a window for avoiding the rotor engagement portion is formed at the bottom of the support cavity. The magnetic levitation motor includes a magnetic levitation stator and a magnetic levitation rotor. The magnetic levitation rotor is disposed in the stirring container and is limited by the rotor engagement portion. The magnetic levitation stator is disposed on the base and is located outside the bottom of the stirring container. The magnetic levitation stator is configured to drive the magnetic levitation rotor to levitate and rotate in a non-contact manner.

[0007] Further, at least two guiding notches extending from the top to the bottom are formed on the side wall of the support cavity, and guiding strips adapted to the guiding notches are formed on the outer wall of the stirring container. The guiding strips are inserted into the guiding notches.

[0008] Further, an elastic body is provided between the guiding strip and the guiding notch, and the elastic body is attached to the guiding strip or the guiding notch.

[0009] Further, a bayonet is formed at one end of the guiding strip, and the bayonet is clamped with the side wall of the support cavity.

[0010] Further, at least one limiting stop is formed on the side wall of the support cavity. Each limiting stop corresponds to one guiding strip, and one end of the guiding strip is stopped at the top of the limiting stop.

[0011] Further, the material of the stirring container is plastic, stainless steel, glass, fiberglass, or carbon steel.

[0012] Further, the support cavity is in a cylindrical shape with both ends open, the side wall of the stirring container is in a cylindrical shape, the bottom wall of the stirring container is configured as a cone protruding outward, and the rotor engagement portion is eccentrically disposed on the side surface of the cone.

[0013] Further, the base further includes a support frame, and the support frame includes a bottom plate and a plurality of support columns. One end of the support column is fixedly connected to the bottom plate, and the other end of the support column is fixedly connected to the support cavity.

[0014] Further, a storage space is formed between the bottom plate and the support cavity, and the magnetic levitation stator is installed in the storage space.

[0015] Further, the base further includes a motor bracket having a mounting surface inclined relative to the bottom plate, and the magnetic levitation stator is detachably mounted on the mounting surface.

[0016] Further, an operation handle is formed on the outer side of the guide bar.

[0017] Further, the stirring container includes a container body with an open end and a container lid. The side wall of the stirring container is configured as the side wall of the container body, the bottom wall of the stirring container is configured as the bottom wall of the container body, and a flange protruding outward is formed at the open end of the container body.

[0018] Further, a liquid outlet is formed at the center of the bottom wall of the container body.

[0019] Further, a through hole is formed in the bottom wall of the stirring container. The rotor engaging portion is configured as an isolation sleeve. The isolation sleeve includes a concave cavity portion. The isolation sleeve is hermetically connected to the edge of the through hole, and the concave cavity portion protrudes outward or inward from the bottom wall of the stirring container.

[0020] Further, the magnetic levitation rotor includes a rotor main body and a plurality of blades formed on the rotor main body. The concave cavity portion protrudes outward from the bottom wall of the stirring container. The magnetic levitation rotor is disposed in the stirring container, the rotor main body is disposed in the concave cavity portion, and the magnetic levitation stator and the magnetic levitation rotor are configured as an inner-rotor type magnetic levitation motor.

[0021] Further, the magnetic levitation rotor includes a rotor main body and a plurality of blades formed on the rotor main body. The concave cavity portion protrudes inward from the bottom wall of the stirring container. The magnetic levitation rotor is disposed in the stirring container, the rotor main body is sleeved outside the concave cavity portion, and the magnetic levitation stator and the magnetic levitation rotor are configured as an outer-rotor type magnetic levitation motor.

[0022] The beneficial effects of the present utility model are as follows:

[0023] Compared with the prior art, the rigid stirring container of the desktop magnetic levitation stirring device of the present utility model is detachably fixed to the support cavity in a retractable manner, which is convenient for assembling and disassembling the stirring container, meeting the load-bearing fixation during the stirring and mixing process and disassembling the stirring container for offline sterilization and cleaning. The support cavity is configured as a part of the base, which is convenient for placing on the desktop, for example, in a laboratory environment, facilitating the operator. The magnetic levitation motor is directly connected to the rotor engaging portion passing through the window of the support cavity, which can realize non-contact driving of the magnetic levitation rotor to levitate and rotate. Compared with a magnetic force motor, the magnetic levitation rotor of the magnetic levitation motor is disposed in the stirring container, and there is no mechanical coupling between the magnetic levitation rotor and the rotor engaging portion of the stirring container. There is no wear during the stirring or mixing process, and almost no debris particles are generated, which can ensure the purity of the liquid medium.

[0024] In order to make the above and other objects, features and advantages of the present utility model more obvious and understandable, the following will specifically describe preferred embodiments in conjunction with the accompanying drawings as follows. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 is a schematic structural diagram of an embodiment of the magnetic levitation stirring device of the present utility model Figure 1 ;

[0027] Figure 2 is an exploded view of an embodiment of the magnetic levitation stirring device of the present utility model;

[0028] Figure 3 is a schematic structural diagram of an embodiment of the stirring container of the present utility model;

[0029] Figure 4 is a schematic structural diagram of an embodiment of the magnetic levitation stirring device (hiding the stirring container) of the present utility model;

[0030] Figure 5 is a schematic structural diagram of an embodiment of the magnetic levitation stirring device of the present utility model Figure 2 ;

[0031] Figure 6 is Figure 5 a schematic structural diagram of the cross-section taken along the A-A direction (hiding the magnetic levitation stator and the motor bracket) in; Detailed Embodiments

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. The terms "comprising" and "provided with" in the description and claims of the present utility model and any variations thereof are intended to cover non-exclusive inclusion. For example, a system, product or device comprising a series of units does not necessarily have to be limited to those units clearly listed, but may include other units not clearly listed or inherent to these products or devices.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

[0035] The drawings in the present disclosure are not strictly drawn to actual scale, and the specific dimensions and quantities of each structure can be determined according to actual needs. The drawings described in the present disclosure are only schematic diagrams.

[0036] Figure 1 is a schematic structural diagram of an embodiment of the magnetic levitation stirring device of the present utility model Figure 1 ; Figure 2 is an exploded view of an embodiment of the magnetic levitation stirring device of the present utility model; Figure 3 is a schematic structural diagram of an embodiment of the stirring container of the present utility model; Figure 4 is a schematic structural diagram of an embodiment of the magnetic levitation stirring device (hiding the stirring container) of the present utility model; Figure 5 is a schematic structural diagram of an embodiment of the magnetic levitation stirring device of the present utility model Figure 2 Figure 6 is Figure 5 a schematic structural diagram of the cross-section along the A-A direction (hiding the magnetic levitation stator and the motor bracket) in

[0037] According to an embodiment of the present disclosure, refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4, A desktop magnetic levitation stirring device, comprising a magnetic levitation motor 1, a stirring container 2 and a base 3. The base 3 includes a support cavity 31 adapted to the outer wall of the stirring container 2. The stirring container 2 is configured as a rigid container and is received in the support cavity 31 and detachably and fixedly connected to the support cavity 31. A rotor engaging portion 21 is formed on the bottom wall of the stirring container 2, and a window 311 for avoiding the rotor engaging portion 21 is formed at the bottom of the support cavity 31. The magnetic levitation motor 1 includes a magnetic levitation stator 11 and a magnetic levitation rotor 12. The magnetic levitation rotor 11 is disposed in the stirring container 2 and is limited by the rotor engaging portion 21. The magnetic levitation stator 11 is disposed on the base 3 and is located outside the bottom of the stirring container 2. The magnetic levitation stator 11 is configured to drive the magnetic levitation rotor 12 to levitate and rotate in a non-contact manner. Among them, the rigid stirring container of the desktop magnetic levitation stirring device is detachably and fixedly connected to the support cavity in a storage manner, which is convenient for assembling and disassembling the stirring container, and meets the load-bearing and fixing during the stirring and mixing process and the disassembly of the stirring container for off-line sterilization and cleaning. The support cavity is configured as a part of the base, which is convenient to be placed on the desktop. For example, in a laboratory environment, it is convenient for the operator. The magnetic levitation motor is directly connected to the rotor engaging portion passing through the window of the support cavity, and can realize the non-contact driving of the magnetic levitation rotor to levitate and rotate. Compared with a magnetic force motor, the magnetic levitation rotor of the magnetic levitation motor is disposed in the stirring container, and there is no mechanical coupling between the magnetic levitation rotor and the rotor engaging portion of the stirring container. There is no wear during the stirring or mixing process, and almost no debris particles are generated, which can ensure the purity of the liquid medium.

[0038] According to an embodiment of the present disclosure, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , at least two guiding notches 312 extending from the top to the bottom are formed on the side wall of the support cavity 31, and guiding strips 22 adapted to the guiding notches 312 are formed on the outer wall of the stirring container 2. The guiding strips 22 are inserted into the guiding notches 312. Through the plug-in cooperation of the guiding notches and the guiding strips, the detachable assembly and fixation of the stirring container and the support cavity can be realized. The number of the guiding notches and the guiding strips is not limited. Preferably, refer to Figure 3 and Figure 4 , both the guiding notches and the guiding strips are three. In other embodiments, it may also be four or five. The cooperation of the guiding notches and the guiding strips can play a role in bearing the stirring container on the one hand and restricting the circumferential rotation of the stirring container on the other hand. The structure is simple and the assembly is very convenient.

[0039] According to an embodiment of the present disclosure, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4, an elastomer (not shown) is provided between the guiding strip 22 and the guiding notch 312, and the elastomer is attached to the guiding strip 22 or the guiding notch 312. In this way, by providing an elastomer between the guiding strip and the guiding notch, a shock-absorbing effect can be achieved.

[0040] According to an embodiment of the present disclosure, referring to Figure 2 and Figure 3 , a bayonet 23 is formed at one end of the guiding strip, and the bayonet 23 is clamped with the side wall of the support cavity 31. By clamping the bayonet with the side wall of the support cavity, the radial movement of the stirring container relative to the support cavity is restricted, making the connection between the stirring container and the support cavity more stable.

[0041] According to an embodiment of the present disclosure, referring to Figure 2 and Figure 3 , at least one limiting stop 313 is formed on the side wall of the support cavity 31, each limiting stop 3132 corresponds to a guiding strip 22, and one end of the guiding strip 22 abuts against the top of the limiting stop 313. Among them, the limiting stop plays a role in preventing axial misalignment and preventing damage to the rotor joint (isolation sleeve). The number of guiding strips and limiting stops is not limited. For example, one of the struts of the support frame can be used as the limiting stop, which is aligned with a guiding strip, and the height of this limiting stop is different from that of other struts.

[0042] In the present utility model, the stirring container is configured as a rigid container. For example, the material of the stirring container can be plastic, stainless steel, glass, fiberglass, or carbon steel. Preferably, the material of the stirring container is stainless steel, which can be used in occasions with strong medium corrosion and high acidity and alkalinity. Moreover, the inner and outer walls of the stainless steel stirring container can be mirror-polished, which not only makes the appearance beautiful but also improves the product quality.

[0043] The present utility model does not limit the shape of the stirring container. Preferably, according to an embodiment of the present disclosure, referring to Figure 2 , Figure 3 and Figure 4 , the support cavity 31 is in the shape of a cylindrical tube with both ends open, the side wall of the stirring container 2 is in the shape of a cylinder, the bottom wall of the stirring container 2 is configured as a cone protruding outward, and the rotor joint 21 is eccentrically arranged on the side surface of the cone. The conical bottom design plays an important role in improving the performance and operation efficiency of the stirring container. For example, the conical bottom reduces the dead corners inside the container, making cleaning easier. When the overall shape of the container is cylindrical, the magnetic levitation motor is eccentrically installed, which can break the cylindrical rotation area caused by installing at the exact center of the container bottom, improve the mixing effect, and make the fluid distribution in the container more uniform.

[0044] The present utility model does not limit the structural form of the base. It can be a base with an integral housing, or a base with various shapes and structures composed of a support frame. Preferably, referring to Figure 1 ,Figure 2 and Figure 4 The base 3 further includes a support frame 32. The support frame 32 includes a bottom plate 321 and a plurality of support columns 322. One end of each support column 322 is fixedly connected to the bottom plate 321, and the other end of each support column 322 is fixedly connected to the support cavity 31. In this way, while realizing the support, it can provide a receiving space for the installation of the magnetic levitation motor. The number of support columns is not limited. Preferably, 3 or 4 support columns can be provided to provide stable support. In other embodiments, the support columns can also be changed into plate-like or cylindrical forms.

[0045] According to an embodiment of the present disclosure, referring to Figure 1 、 Figure 2 and Figure 4 A receiving space is formed between the bottom plate 321 and the support cavity 31, and the magnetic levitation stator 11 is installed in the receiving space. Referring to Figure 2 The magnetic levitation stator 11 is accommodated in the housing, and a potting material is filled between the magnetic levitation stator and the housing. The potting material includes but is not limited to epoxy resin, silicone, polyurethane, etc.

[0046] According to an embodiment of the present disclosure, referring to Figure 1 and Figure 2 The base 3 further includes a motor bracket 33. The motor bracket 33 has a mounting surface 331 that is inclined relative to the bottom plate. The magnetic levitation stator 11 is detachably mounted on the mounting surface 331. The motor bracket is used to carry the magnetic levitation motor, and its structural form is not limited and can be set according to actual needs. Preferably, in this embodiment, the motor bracket has a mounting surface, and the mounting surface is inclined relative to the bottom plate of the base to facilitate the eccentric installation of the magnetic levitation motor. Preferably, the position of the magnetic levitation motor on the motor bracket is adjustable. The housing of the magnetic levitation motor is fixedly connected to the slider, and the slider cooperates with the chute on the mounting surface and is locked by a fastener after being adjusted to a suitable position.

[0047] According to an embodiment of the present disclosure, referring to Figure 1 and Figure 2 An operation handle 24 is formed on the outer side of the guide bar 22. Since it is a desktop magnetic levitation stirring device, it is more suitable for small-volume stirring containers in, for example, laboratories or production plants. Therefore, a handle is provided on the stirring container to facilitate the operator to assemble the stirring container. In this embodiment, the handle is provided on the outer side of the guide bar, which does not affect the normal assembly between the stirring container and the support cavity.

[0048] According to an embodiment of the present disclosure, referring to Figure 3 The stirring container 2 includes a container body with an open end and a container lid. The side wall of the stirring container is configured as the side wall of the container body, and the bottom wall of the stirring container is configured as the bottom wall of the container body. An outwardly protruding flange is formed at the open end of the container body. Figure 3 Only the container body is schematically shown in , and the container lid can be configured as needed.

[0049] According to an embodiment of the present disclosure, referring to Figure 3 , a liquid outlet 25 is formed at the center of the bottom wall of the container body. The liquid outlet is used to discharge the liquid or material in the stirring container, so that the material can flow out of the stirring container smoothly, facilitating subsequent processing or transfer.

[0050] According to an embodiment of the present disclosure, referring to Figure 2 and Figure 3 , a through hole 26 is formed on the bottom wall of the stirring container 2, and the rotor engaging portion is configured as a spacer sleeve. The spacer sleeve includes a concave cavity portion 211. The spacer sleeve is hermetically connected to the edge of the through hole 26, and the concave cavity portion 211 protrudes outward or inward from the bottom wall of the stirring container. The spacer sleeve can be integrally formed with the stirring container or made into a split structure and then assembled into one body. For example, when the stirring container is made of plastic, the spacer sleeve can be made of the same plastic material as the stirring container according to needs, including but not limited to PTFE, PP, PVDF, etc. When the stirring container is made of stainless steel, in order to reduce the influence of the stainless steel material on the sensor of the magnetic levitation motor, the spacer sleeve can be made of plastic material, and the spacer sleeve is hermetically connected to the stirring container. Including but not limited to a sealing ring type sealing structure. According to the cooperation relationship between the magnetic levitation rotor and the magnetic levitation stator, the rotor engaging portion has different forms. For example, referring to Figure 6 , the magnetic levitation motor is an inner rotor, and the rotor engaging portion 21 is configured as a concave cavity portion protruding outward from the bottom of the stirring container, and the rotor main body 121 is accommodated in the concave cavity portion. The magnetic levitation stator 11 has a rotor cavity, and the concave cavity portion protrudes into the rotor cavity, constituting an inner rotor type magnetic levitation motor. However, it is not limited to this. In other embodiments, the magnetic levitation motor can also be an outer rotor. At this time, the magnetic levitation rotor includes a rotor main body 121 and a plurality of blades 122 formed on the rotor main body 121. The concave cavity portion 211 protrudes inward from the bottom wall of the stirring container. The magnetic levitation rotor 12 is arranged in the stirring container 2, the rotor main body 121 is sleeved outside the concave cavity portion 211, and the magnetic levitation stator 11 and the magnetic levitation rotor 12 are configured as an outer rotor type magnetic levitation motor. That is, the rotor main body is in a circular ring shape and is sleeved on the concave cavity portion, and the magnetic levitation stator is arranged in the hollow portion of the concave cavity portion, constituting an outer rotor type magnetic levitation motor.

[0051] According to an embodiment of the present disclosure, referring to Figure 4 and Figure 6, the magnetic levitation rotor 12 includes a rotor body 121 and a plurality of blades 122 formed on the rotor body 121. The magnetic levitation stator 11 drives the magnetic levitation rotor 12 to levitate and rotate based on the principle of a bearingless pancake motor. In this way, during operation, the magnetic levitation stator drives the rotor body 121 of the magnetic levitation rotor 12 to rotate, and the rotor body 121 in turn drives the blades 122 to rotate and levitate. The rotation of the blades 122 drives the fluid flow in the stirring container to achieve the purpose of stirring and mixing. The magnetic levitation rotor can be set as a disposable material in the stirring container or as a non-disposable material for repeated use, and the magnetic levitation rotor is limited by the rotor engaging portion of the stirring container.

[0052] Among them, based on the principle of a bearingless pancake motor, the magnetic levitation rotor is driven by the levitation and rotating magnetic field of the magnetic levitation stator to rotate and levitate stably. Specifically, the magnetic levitation rotor can be, for example, a permanent magnet rotor or a short-circuit cage rotor or a reluctance rotor. Preferably, the magnetic levitation rotor is a permanent magnet rotor. For example, the magnetic levitation rotor is a permanent magnet rotor and includes 1 pole pair, and the pole pair includes 2 magnetic poles with opposite polarities (N pole and S pole). The 2 magnetic poles are arranged radially and generate a magnetic field distributed according to a cosine. Its technical principle is already in the prior art and will not be elaborated here. For more technical content, reference can be made to patent documents CN116191701A, CN116961510A, etc.

[0053] The bearingless pancake motor is a special bearingless motor. It inherits the advantages of the bearingless motor, and the ratio of the axial length to the diameter of the rotor is very small, showing a thin sheet shape. The axial magnetic bearing is omitted, and the rotation and active suspension of the rotor in the radial direction are realized by using the bearingless technology. The passive suspension of the other three degrees of freedom except for the radial and rotor rotation degrees of freedom is realized by using the magnetic circuit formed by the mechanical structure. It has the characteristics of high cleanliness, no precipitation, no particles, no dynamic seal, and excellent performance, and has good application prospects in ultra-pure drive fields such as biochemistry, medical treatment, and semiconductor manufacturing.

[0054] The bearingless pancake motor can be divided into a single-winding structure and a double-winding structure according to different winding structures. The present invention does not limit the winding structure of the bearingless pancake motor, which can be a single-winding structure or a double-winding structure. The stator assembly of the magnetic levitation stator includes a plurality of stator teeth and a plurality of control windings. In one embodiment, two winding coils are arranged on each stator tooth. The two winding coils can both be concentrated windings, or one winding coil can be a concentrated winding and the other winding coil can be a distributed winding. The two winding coils on the stator tooth are wound together. One winding coil is used for rotation control, and the other winding coil is used for suspension control to form the double-winding structure of the magnetic levitation motor. In another embodiment, one winding coil is arranged on each stator tooth, and the winding coil is a concentrated winding. The winding coil is used for both rotation control and suspension control to form the single-winding structure of the magnetic levitation motor.

[0055] The magnetic levitation motor is not limited to the structural form of the magnetic levitation stator. For example, the magnetic levitation stator can be a magnetic levitation stator structure of one - type stator teeth formed by connecting the outer ends of multiple one - type stator teeth to a magnetic conductive ring (stator yoke), or it can be a magnetic levitation stator structure of L - type stator teeth formed by connecting the longitudinal parts of multiple L - type stator teeth to a magnetic conductive ring. In this embodiment, there is no specific limitation on the installation structure of the magnetic levitation stator in the machine shell.

[0056] In the present utility model, specific embodiments are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A desktop magnetic levitation stirring device, comprising a magnetic levitation motor (1), a stirring container (2) and a base (3), characterized in that: The base comprises a support cavity (31) adapted to the outer wall of the stirring container, the stirring container is configured as a rigid container, the stirring container is accommodated in the support cavity and is detachably fixedly connected to the support cavity, a rotor joint portion (21) is formed on the bottom wall of the stirring container, and a window (311) is formed at the bottom of the support cavity to avoid the rotor joint portion, the magnetic levitation motor comprises a magnetic levitation stator (11) and a magnetic levitation rotor (12), the magnetic levitation rotor is arranged in the stirring container and is limited by the rotor joint portion, the magnetic levitation stator is arranged on the base and is located outside the bottom of the stirring container, and the magnetic levitation stator is configured to drive the magnetic levitation rotor to suspend and rotate in a contactless manner.

2. The desktop magnetic levitation stirring device according to claim 1, characterized in that: At least two guide slots (312) extending from the top to the bottom are formed on the side wall of the support cavity, and guide strips (22) adapted to the guide slots are formed on the outer wall of the stirring container, and the guide strips are inserted into the guide slots.

3. The desktop magnetic levitation stirring device according to claim 2, characterized in that: An elastic body is arranged between the guide bar and the guide slot, and the elastic body is attached to the guide bar or the guide slot.

4. The desktop magnetic levitation stirring device according to claim 2, characterized in that: A snap-in (23) is formed at one end of the guide strip, and the snap-in is snap-connected with the side wall of the support cavity.

5. The desktop magnetic levitation stirring device according to claim 3, characterized in that: At least one limit stop (313) is formed on the side wall of the support cavity, each limit stop corresponds to one guide bar, and one end of the guide bar stops at the top of the limit stop.

6. The desktop magnetic levitation stirring device according to claim 1, characterized in that: The material of the stirring container is plastic, stainless steel, glass, glass fiber reinforced plastic or carbon steel.

7. The desktop magnetic levitation stirring device according to claim 1, characterized in that: The supporting cavity is in the shape of a cylinder with openings at both ends, the side wall of the stirring container is in the shape of a cylinder, the bottom wall of the stirring container is configured as a cone protruding outward, and the rotor engaging portion is eccentrically arranged on the side of the cone.

8. The desktop magnetic levitation stirring device according to claim 1, characterized in that: The base also includes a support frame (32), which includes a bottom plate (321) and a plurality of pillars (322), one end of each pillar being fixedly connected to the bottom plate, and the other end of each pillar being fixedly connected to the support cavity.

9. The desktop magnetic levitation stirring device according to claim 8, characterized in that: A storage space is formed between the bottom plate and the supporting cavity, and the magnetic suspension stator is installed in the storage space.

10. The desktop magnetic levitation stirring device according to claim 9, characterized in that: The base also includes a motor bracket (33), the motor bracket having a mounting surface (331) that is inclined relative to the base plate, and the magnetic suspension stator is detachably mounted on the mounting surface.

11. The desktop magnetic levitation stirring device according to claim 2, characterized in that: An operating handle (24) is formed on the outer side of the guide strip.

12. The desktop magnetic levitation stirring device according to claim 1, characterized in that: The stirring container comprises a container body with an opening at one end and a container cover, the side wall of the stirring container is configured as the side wall of the container body, the bottom wall of the stirring container is configured as the bottom wall of the container body, and the open end of the container body is formed with an outwardly protruding edge.

13. The desktop magnetic levitation stirring device according to claim 12, characterized in that: A liquid outlet (25) is formed at the center of the bottom wall of the container body.

14. The desktop magnetic levitation stirring device according to claim 1, characterized in that: A through hole (26) is formed on the bottom wall of the stirring container, the rotor joint portion is configured as an isolation sleeve, the isolation sleeve includes a concave cavity portion (211), the isolation sleeve is sealed and connected to the edge of the through hole, and the concave cavity portion protrudes outward or inward from the bottom wall of the stirring container.

15. The desktop magnetic levitation stirring device according to claim 14, characterized in that: The magnetic levitation rotor comprises a rotor body (121) and a plurality of blades (122) formed on the rotor body, the concave cavity protrudes outward from the bottom wall of the stirring container, the magnetic levitation rotor is arranged in the stirring container, the rotor body is arranged in the concave cavity, and the magnetic levitation stator and the magnetic levitation rotor are configured as an inner rotor type magnetic levitation motor.

16. The desktop magnetic levitation stirring device according to claim 15, characterized in that: The magnetic levitation rotor comprises a rotor body (121) and a plurality of blades (122) formed on the rotor body, the concave cavity protrudes inward from the bottom wall of the stirring container, the magnetic levitation rotor is arranged in the stirring container, the rotor body is sleeved outside the concave cavity, and the magnetic levitation stator and the magnetic levitation rotor are configured as an outer rotor type magnetic levitation motor.

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