Non-contact suspension stirring equipment and stirring method thereof

Abstract

The invention discloses non-contact suspension stirring equipment and a stirring method thereof. The non-contact suspension stirring equipment comprises a basic fixing assembly, a main transmission assembly, a suspension supporting system and a suspension stirring mechanism. Equipment is fixed to the bottom of a liquid container through a flange and an isolation sleeve, after a motor adjusts the rotating speed to a proper stirring speed through a speed reducer, a main shaft of the speed reducer drives an input shaft to rotate through a coupler to drive a driving rotor shell and a magnet in the driving rotor shell to generate a rotating magnetic field, and a suspension stirring mechanism is driven to rotate through magnetic coupling of an inner magnet and an outer magnet. The suspension supporting system adopts the homopolar repulsion principle to enable the stirring mechanism to be suspended, a sliding bearing is formed through a silicon carbide wear-resistant shaft sleeve, and frictional wear is reduced. Non-contact power transmission between the main transmission assembly and the stirring mechanism is achieved, mechanical seal leakage and pollution are avoided, and the device has the advantages of being resistant to abrasion, low in shearing, low in energy consumption, stable in operation and the like, is suitable for occasions needing sterile and low-shearing stirring such as biological medicine, dairy products and beverages and has wide industrial application value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stirring equipment, in particular to a non-contact suspension stirring equipment and a stirring method thereof. Therefore, the present application is a stirring equipment for the fields of biological medicine, dairy products, beverages and the like, which has the characteristics of simple structure, convenient maintenance, large cleaning gap, zero gravity design and the like, and the equipment keeps a suspension state, effectively eliminates axial friction, reduces shear and reduces particle generation. In addition, the positioning of the isolating sleeve and the flange can effectively keep the stability of stirring and reduce vibration and noise. BACKGROUND

[0002] The existing magnetic stirring equipment mainly adopts single-stage magnetic stirring, and multi-stage magnetic stirring is relatively less. The driving mode of the magnetic stirring equipment is magnetic drive type, mechanical transmission type and electromagnetic induction type. The commonly used stirring elements are stirring paddles, magnetic stirring sub and spiral stirring rod.

[0003] The existing magnetic stirring equipment mostly adopts single-stage magnetic stirring technology, and has many deficiencies in many aspects. In terms of stirring performance, when processing large volume or high viscosity liquid, the uniformity is poor, there are easy stirring dead angles, and the stirring intensity sometimes cannot meet the rapid and powerful stirring demand. In terms of magnetic drive, the magnet has magnetic attenuation after long-term use, which affects stability and efficiency. When the load is high or the speed is high, the magnetic coupling is easy to slip, which causes the stirring speed to be unstable. In terms of structural design, the adaptability to different shapes and sizes of containers is poor, and rotating parts such as stirring shaft and bearing are easy to wear, especially in solid particle liquid. In terms of heat dissipation, when the power of the stirring equipment is large and generates a lot of heat, it is difficult to quickly and effectively dissipate the heat, which may cause the internal temperature to be too high. SUMMARY

[0004] The contact suspension stirring equipment aims to design a magnetic stirring equipment with unique design and function, which not only has aseptic design, but also can reduce particle shedding. In addition, the unique wear-resistant shaft sleeve and suspension structure design make the stirring equipment have a wider application occasion. The wear-resistant sleeve is made of silicon carbide material with excellent wear resistance, and the silicon carbide wear-resistant sleeve forms a sliding bearing which can effectively reduce wear and prolong the service life of the bearing. At the same time, the suspension structure design makes the suspension stirring mechanism always in a suspended state, which can greatly reduce friction and vibration. The equipment can be perfectly applied to pharmaceutical and biotechnology liquid-liquid mixing / liquid-powder mixing and other application occasions.

[0005] To solve the above technical problems, the technical scheme of the present application provides a non-contact suspension stirring equipment, which comprises: The basic fixed assembly is composed of a flange and an isolating sleeve. The isolating sleeve is installed at the bottom of the liquid container by welding. The flange fixes the isolating sleeve and the speed reducer together by bolt fastening. The main drive shaft system is formed by a motor connected to a reducer for speed regulation. The main shaft of the reducer is connected to the input shaft by a rigid coupling, which drives the main transmission assembly to rotate. The main drive assembly consists of an input shaft, a drive rotor housing, a drive rotor cover, countersunk bolts, and an inner magnet. The drive rotor housing is bolted to the input shaft and the countersunk hole is sealed by spot welding. The drive rotor cover is fixed to the drive rotor housing by welding. The inner magnet is bonded to the magnetic groove of the drive rotor housing. The suspension support system includes a support shaft, a wear-resistant bushing A, a suspension sleeve, a cap, and a suspension magnet. The support shaft and the isolation sleeve are axially positioned and connected by a threaded pair. The magnetic poles of the suspension magnet and the support magnet installed in the inner hole of the wear-resistant bushing A are opposite, so as to achieve suspension support by the repulsion of like poles. The suspension stirring mechanism includes blades, a suspension sleeve, a wear-resistant bushing B, a sleeve, a cap, an outer magnet, a driven rotor housing, and a driven rotor cover. The blades are fixed to the suspension sleeve, the sleeve, and the driven rotor housing by welding. The driven rotor housing is welded to the driven rotor cover. The outer magnet is bonded to the magnetic groove of the driven rotor housing. The motor adjusts the main shaft speed to a suitable stirring speed through a reducer. The reducer main shaft drives the input shaft and main transmission assembly to rotate through a coupling. Magnetic coupling is formed between the inner and outer magnets to drive the suspension stirring mechanism to rotate. The suspension support system keeps the suspension stirring mechanism in a stable suspended state during dynamic operation. Wear-resistant bushing A and wear-resistant bushing B form a sliding bearing, thereby realizing non-contact magnetic power transmission between the main transmission assembly and the suspension stirring mechanism.

[0006] Optionally, both the wear-resistant bushing A and the wear-resistant bushing B are made of silicon carbide material to improve wear resistance and extend service life.

[0007] Optionally, the magnetic poles of the suspending magnet and the supporting magnet at the inner hole of the wear-resistant bushing A are opposite in direction, forming a magnetic levitation support structure in which like poles repel each other.

[0008] Optionally, the outer and inner magnets are symmetrical multi-pole magnetic rings, employing fan-shaped magnetic blocks with alternating N and S poles, and expanding the effective magnetic field coverage area through a magnetic pole misalignment design.

[0009] Optionally, the blades are arranged in three to five evenly spaced pieces, preferably four.

[0010] Optionally, the isolation sleeve is a sealed structure used to isolate the main transmission assembly from the physical contact between the drive components and prevent cross-contamination.

[0011] Optionally, the connection between the main rotor shell and the input shaft is a bolt fastening structure, and the blind hole is sealed by spot welding.

[0012] Optionally, the servo motor is matched with the driver to control, so as to realize accurate adjustment of the rotating speed of the suspension stirring mechanism.

[0013] Optionally, the isolation sleeve, the flange and the reducer are radially matched with a gap, and the bolt connection is a circumferentially uniform structure, so as to ensure positioning accuracy and sealing performance.

[0014] To solve the above technical problems, the technical scheme of the present application further provides a non-contact suspension stirring method, which comprises the following steps: The installation step is to fix the non-contact suspension stirring equipment to the bottom of the liquid container through the isolation sleeve, and connect the isolation sleeve and the reducer through the flange; the motor is reduced in speed through the reducer, and the main shaft of the reducer is connected with the input shaft through the coupling to drive the main transmission assembly.

[0015] The driving step is to start the servo motor to drive the reducer, the input shaft and the main rotor shell to rotate, and the inner magnet in the main rotor shell generates a rotating magnetic field. The magnetic coupling step is to form magnetic coupling by the inner magnet and the outer magnet arranged on the driven rotor shell, so as to drive the suspension stirring mechanism to rotate. The suspension supporting step is to make the suspension stirring mechanism in a stable suspension state through the repulsion of the same poles of the suspension magnet installed on the supporting shaft and the support magnet in the inner hole of the wear-resistant bushing A. The stirring step is to drive the liquid to form a vortex in the rotating process of the blade of the suspension stirring mechanism, so as to realize liquid-liquid mixing or liquid-powder mixing. The wear-resistant bushing A and the wear-resistant bushing B form a sliding bearing to reduce friction and wear, and ensure that the power transmission between the main transmission assembly and the suspension stirring mechanism is non-contact magnetic transmission.

[0016] The technical scheme of the present application has the following beneficial effects: The present application realizes non-contact power transmission between the main transmission assembly and the stirring cavity through magnetic coupling driving and sealing isolation sleeve, avoids liquid leakage and cross contamination caused by mechanical seal wear of the traditional stirring equipment, and is suitable for sterile environments such as biological medicine, food and beverage.

[0017] The present application adopts the repulsion support structure formed by the suspension magnet to keep the suspension stirring mechanism in a suspension state during operation, and the wear-resistant bushing A and the wear-resistant bushing B made of silicon carbide material constitute a sliding bearing, which greatly reduces mechanical friction, prolongs the service life of the equipment and reduces the maintenance frequency.

[0018] The application expands the magnetic field action range by the alternate arrangement of the inner magnet and the multi-pole magnetic ring of the outer magnet, so that the blades of the suspension stirring mechanism can form stable eddy current, effectively avoid stirring dead angle, improve the uniformity of liquid-liquid mixing or liquid-powder mixing, and are particularly suitable for high viscosity or heterogeneous systems.

[0019] The suspension stirring mechanism avoids axial friction and excessive shear during rotation, reduces the risk of particle breakage, reduces local overheating and boiling phenomenon, and improves the safety and stability of the stirring process, and is particularly suitable for sensitive biological culture liquid or fine chemical reactions.

[0020] The magnetic coupling transmission effectively blocks the eddy current effect, reduces energy consumption and suppresses overheating; at the same time, the suspension support system makes the stirring process run smoothly, and the noise is significantly lower than that of traditional stirring equipment, which is suitable for laboratory and clean workshop environment.

[0021] The overall structure of the application is modular, and the flange, isolation sleeve, stirring blade and the like can be replaced according to the size of the container and process requirements, suitable for liquid stirring under different volume and different process conditions, and has wide industrial applicability.

[0022] The support shaft and the wear-resistant sleeve A are gap fitted, and the flexible connection between the support shaft and the wear-resistant sleeve A is realized through the rubber ring; the wear-resistant sleeve B and the sleeve are gap fitted, and the flexible connection between the wear-resistant sleeve B and the sleeve is realized through the rubber ring, which can effectively reduce the impact vibration of the wear-resistant sleeve A and the wear-resistant sleeve B during rotation in the stirring process. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic diagram of the non-contact suspension stirring equipment in the embodiment of the application; Figure 2 is a perspective view of the non-contact suspension stirring equipment in the embodiment of the application; Figure 3 is an exploded view of the non-contact suspension stirring equipment in the embodiment of the application; Figure 4 is a stirring test diagram of the non-contact suspension stirring equipment in the embodiment of the application in the acrylic barrel. DETAILED DESCRIPTION

[0024] The application will be further described below in combination with the drawings and specific embodiments, but not as a limitation of the application.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the 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 this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Please see Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of a non-contact suspension mixing device is illustrated, comprising: The basic fixing assembly consists of a flange 1 and an isolation sleeve 2. The isolation sleeve 2 is fixed to the bottom of the liquid container by welding. The flange 1 is used to install the reducer 22 and the isolation sleeve 2 together by bolt fastening. The flange 1 is used to achieve precise positioning between the isolation sleeve and the reducer. The main drive shaft system is formed by connecting the motor 23 and the speed reducer 22 together through bolts, adjusting the rotating speed to a suitable stirring speed, connecting the main shaft of the speed reducer 22 and the input shaft 18 together through the rigid coupling 19, driving the main transmission assembly to rotate, and forming the main drive shaft system. The main transmission assembly is composed of the input shaft 18, the driving rotor shell 16, the driving rotor cover 21 and the inner magnet 17. The driving rotor shell 16 is connected with the input shaft 18 through bolts and is fully welded in the countersunk hole by spot welding. The driving rotor cover is fixed with the driving rotor shell 16 by welding. The inner magnet 17 is bonded and installed in the magnetic slot of the driving rotor shell 16. The suspension support system includes the support shaft 15, the wear-resistant sleeve A8, the suspension sleeve 9, the cap head 10 and the suspension magnet 11. The support shaft 15 is connected with the isolation sleeve 2 through the threaded pair for axial positioning. The magnetic pole direction of the suspension magnet 11 is opposite to that of the support magnet 12 installed in the inner hole of the wear-resistant sleeve A8, so as to realize the suspension support in the same pole repulsion mode. The suspension stirring mechanism includes the blade 7, the suspension sleeve 9, the wear-resistant sleeve B14, the sleeve 13, the cap head 10, the outer magnet 6, the driven rotor shell 4 and the driven rotor cover 3. The blade 7 is fixed with the suspension sleeve 9, the sleeve 13 and the driven rotor shell 4 by welding. The driven rotor shell 4 is connected with the driven rotor cover 3 by welding. The outer magnet 6 is bonded and installed in the magnetic slot of the driven rotor shell 4. In the embodiment, the motor realizes speed regulation through the speed reducer. The main shaft of the speed reducer drives the input shaft 18 and the main transmission assembly to rotate through the coupling 19. The magnetic force coupling is formed between the inner magnet 17 and the outer magnet 6 to drive the suspension stirring mechanism to rotate. The suspension support system keeps the suspension stirring mechanism in a stable suspension state during dynamic operation. The wear-resistant sleeve A8 and the wear-resistant sleeve B14 form a sliding bearing, so as to realize the non-contact magnetic dynamic force transmission between the main transmission assembly and the suspension stirring mechanism.

[0030] In the embodiment, the wear-resistant sleeve A8 and the wear-resistant sleeve B14 are both made of silicon carbide material, so as to improve the wear resistance and prolong the service life.

[0031] In the embodiment, the magnetic pole direction of the suspension magnet 11 is opposite to that of the support magnet 12 at the inner hole of the wear-resistant sleeve A8, so as to form the magnetic suspension support structure of the same pole repulsion.

[0032] In the embodiment, the outer magnet 6 and the inner magnet 17 are symmetrical multi-pole magnetic rings. The fan-shaped magnetic blocks with N pole and S pole arranged alternately are adopted. The effective magnetic field coverage area is expanded by the magnetic pole misalignment design.

[0033] In the embodiment, the blade 7 is a three-piece to five-piece uniform arrangement structure, preferably four pieces.

[0034] In this embodiment, the isolation sleeve 2 is a sealed structure, which is used to isolate the main transmission assembly from the driving components to prevent cross contamination.

[0035] In this embodiment, the connection between the driving rotor shell 16 and the input shaft 18 is a bolt fastening structure, and the headless hole is sealed by spot welding, and the driving rotor cover and the driving rotor shell 16 are fixed by welding.

[0036] In this embodiment, the motor cooperates with the driver to control, so as to realize the accurate adjustment of the rotation speed of the suspension stirring mechanism.

[0037] In this embodiment, the isolation sleeve 2, the flange 1 and the speed reducer are installed in a clearance fit mode, and are fixed by circumferentially distributed bolts, so as to ensure the positioning accuracy and the sealing performance.

[0038] In this embodiment, a non-contact suspension stirring method is also disclosed, which comprises the following steps. The installation step: the non-contact suspension stirring equipment is fixed to the bottom of the liquid container through the isolation sleeve 2, and the accurate positioning of the isolation sleeve, the flange and the speed reducer is realized through the flange 1, and the main shaft of the speed reducer is connected with the input shaft 18 through the shaft coupling 19. The driving step: the motor 23 is started to drive the input shaft 18 of the speed reducer 22 and the driving rotor shell 16 to rotate, and the inner magnet 17 in the driving rotor shell 16 generates a rotating magnetic field. The magnetic force coupling step: the inner magnet 17 and the outer magnet 6 arranged on the driven rotor shell 4 form a magnetic force coupling, so as to drive the suspension stirring mechanism to rotate. The suspension supporting step: the suspension stirring mechanism is in a stable suspension state through the repulsion of the same poles between the suspension magnet 11 arranged on the supporting shaft 15 and the supporting magnet 12 in the inner hole of the wear-resistant shaft sleeve A8. The stirring step: the blade 7 of the suspension stirring mechanism drives the liquid to form a vortex in the rotation process, so as to realize the liquid-liquid mixing or liquid-powder mixing. The flexible connection: the supporting shaft 15 and the wear-resistant shaft sleeve A8 are in a clearance fit mode, and the flexible connection between the supporting shaft 15 and the wear-resistant shaft sleeve A8 is realized through the rubber ring 25; the wear-resistant shaft sleeve B14 and the sleeve 13 are in a clearance fit mode, and the flexible connection between the wear-resistant shaft sleeve B14 and the sleeve 13 is realized through the rubber ring 24, and this connection mode can effectively reduce the impact vibration of the wear-resistant shaft sleeve A8 and the wear-resistant shaft sleeve B14 in the rotation process. The wear-resistant shaft sleeve A8 and the wear-resistant shaft sleeve B14 form a sliding bearing, which reduces the friction and wear, and ensures that the power transmission between the main transmission assembly and the suspension stirring mechanism is a non-contact magnetic transmission.

[0039] The characteristics and functions of the present application can be further understood through the following description.

[0040] The composition structure of the device of the embodiment is shown as follows, As Figure 1 shown, the non-contact suspension stirring device of the present application mainly comprises: Base fixing assembly The base fixing assembly is composed of a flange 1, an isolation sleeve 2, a speed reducer 22 and a motor 23. The flange 1 is connected with the isolation sleeve and the speed reducer 22 together by bolt fastening, serving as the fixed reference surface of the whole transmission system; the isolation sleeve 2 is fixed on the bottom of the liquid container by welding; the motor 23 realizes the rotation of the main shaft at a suitable stirring speed through the speed reducer 22.

[0041] Through the sealing structure of the isolation sleeve 2, the direct contact of the main transmission assembly with the liquid can be effectively isolated, cross contamination is avoided, and the stirring process meets the sterile requirement, which is suitable for pharmaceutical and biological culture occasions.

[0042] Main drive shaft system The main shaft of the speed reducer is connected with the input shaft 18 through a rigid coupling 19 to drive the main transmission assembly, constituting the main drive shaft system.

[0043] The use of the rigid coupling can improve the transmission stability and reduce the torque loss, and stable transmission can still be maintained in high-speed stirring or high-viscosity liquid.

[0044] Main transmission assembly The main transmission assembly comprises an input shaft 18, a driving rotor shell 16, a driving rotor cover 21 and an inner magnet 17. The driving rotor shell 16 is connected with the input shaft 18 through a countersunk head bolt 5, and the countersunk head hole is sealed by spot welding, the driving rotor cover is fixed with the driving rotor shell 16 by welding, and the inner magnet 17 is installed in the magnetic slot of the driving rotor shell 16 by bonding.

[0045] A magnetic field is formed by the rotation of the inner magnet 17, which can realize magnetic coupling with the outer magnet 6, ensuring non-contact transmission of stirring power and avoiding the risk of wear and leakage of traditional mechanical shaft sealing.

[0046] Suspension support system The suspension support system is composed of a support shaft 15, a wear-resistant shaft sleeve A8, a suspension sleeve 9, a cap 10 and a suspension magnet 11. The support shaft 15 is connected with the isolation sleeve 2 through a threaded pair, the suspension magnet 11 and the wear-resistant shaft sleeve A8 cooperate with the support magnet 12 inside the support shaft 15, and the suspension stirring mechanism is supported by using the same-pole repulsion principle.

[0047] The magnetic suspension support generated by the suspension magnet 11 and the support magnet 12 can effectively eliminate axial friction, so that the stirring mechanism can maintain a stable suspension state during operation, reduce energy consumption and prolong the service life of the bearing.

[0048] Suspension stirring mechanism The suspension stirring mechanism is composed of the blade 7, the suspension sleeve 9, the wear-resistant sleeve B14, the sleeve 13, the cap head 10, the outer magnet 6, the driven rotor shell 4 and the driven rotor cover 3. The blade 7 is fixed on the suspension sleeve 9, the sleeve 13 and the driven rotor shell 4 by welding, the driven rotor shell 4 is connected with the driven rotor cover 3 by welding, and the outer magnet 6 is installed in the magnetic slot of the driven rotor shell 4 by bonding.

[0049] The outer magnet 6 and the inner magnet 17 form a magnetic coupling to drive the blade 7 to rotate, so that stable vortex flow of the liquid is generated, the stirring dead angle is avoided, and the mixing uniformity is improved.

[0050] Wear-resistant sleeve design The wear-resistant sleeve A8 and the wear-resistant sleeve B14 are both made of silicon carbide material, and together form a sliding bearing for supporting the rotation of the suspension stirring mechanism.

[0051] The silicon carbide material has excellent wear resistance and corrosion resistance, and is particularly suitable for use in liquids containing particles or strong acid and alkali, which greatly prolongs the service life of the equipment and reduces the maintenance cost.

[0052] The support shaft 15 and the wear-resistant sleeve A8 are flexibly connected through the rubber ring 25, and the wear-resistant sleeve B14 and the sleeve 13 are flexibly connected through the rubber ring 24, which can effectively reduce the impact vibration during stirring; The working method of the device of the embodiment is as follows, Installation step The flange 1 and the isolation sleeve 2 are installed at the bottom of the liquid container, the main shaft of the speed reducer 22 is connected with the input shaft 18 through the shaft coupling 19 to drive the main transmission assembly and form a driving passage.

[0053] Driving step Start the servo motor to drive the input shaft 18 and the driving rotor shell 16 to rotate, and the inner magnet 17 in the driving rotor shell 16 rotates accordingly.

[0054] Magnetic coupling step The inner magnet 17 interacts with the outer magnet 6 to form a stable magnetic coupling to drive the suspension stirring mechanism to rotate.

[0055] The non-contact magnetic force transmission avoids mechanical seal leakage and wear, and is particularly suitable for sterile or high-pressure sealed containers.

[0056] Suspension support step The suspension magnets 11 and 12 are in a suspended state through the same-pole repulsion effect, and the wear-resistant sleeve A8 and the wear-resistant sleeve B14 serve as auxiliary sliding bearings to ensure smooth operation of the stirring mechanism.

[0057] In high-speed operation or high-viscosity liquid, the suspension structure significantly reduces mechanical friction and vibration, prolonging the service life of the main shaft and bearing.

[0058] Stirring step The blades 7 of the suspension stirring mechanism rotate under magnetic drive, driving the liquid to form a vortex, realizing liquid-liquid mixing or liquid-powder mixing; continuous stirring can avoid local overheating and boiling.

[0059] The stirring process is gentle and uniform, reducing the risk of shear and particle breakage, and is particularly suitable for processes such as cell culture and dairy processing that require low shear stirring.

[0060] In summary, the present application realizes non-contact power transmission between the main transmission assembly and the stirring cavity through magnetic coupling drive and sealed isolation sleeve, avoiding liquid leakage and cross contamination caused by mechanical seal wear in traditional stirring equipment, and is suitable for sterile environments such as biomedicine, food and beverage.

[0061] The present application adopts the same pole repulsion support structure formed by the suspension magnet, which keeps the suspension stirring mechanism in a suspended state during operation, and cooperates with the wear-resistant shaft sleeve A and the wear-resistant shaft sleeve B to form a sliding bearing, greatly reducing mechanical friction, prolonging the service life of the equipment and reducing the maintenance frequency.

[0062] The present application expands the magnetic field range through the alternating arrangement of the multi-pole magnetic rings of the inner magnet and the outer magnet, enabling the blades of the suspension stirring mechanism to form a stable vortex, effectively avoiding stirring dead angles and improving the uniformity of liquid-liquid mixing or liquid-powder mixing, and is particularly suitable for high-viscosity or heterogeneous systems.

[0063] The present application avoids axial friction and excessive shear during the rotation of the suspension stirring mechanism, reduces the risk of particle breakage, reduces local overheating and boiling, and improves the safety and stability of the stirring process, especially for sensitive biological culture liquids or fine chemical reactions.

[0064] The present application realizes flexible connection between the support shaft 15 and the wear-resistant shaft sleeve A 8 through the rubber ring 25, and realizes flexible connection between the wear-resistant shaft sleeve B 14 and the sleeve 13 through the rubber ring 24, which can effectively reduce the impact vibration during stirring and improve the stirring stability. The present application effectively blocks the vortex effect through magnetic coupling transmission, reduces energy consumption and suppresses overheating; at the same time, the suspension support system makes the stirring process run smoothly, and the noise is significantly lower than that of traditional stirring equipment, which is suitable for laboratory and clean room environment.

[0065] The present application is modular in overall structure, and the flange, isolation sleeve and stirring blades can be replaced according to the size of the container and the process requirements, which is suitable for liquid stirring under different volume and different process conditions, and has wide industrial applicability.

[0066] The above merely preferred embodiments of the present application and are not intended to limit the embodiments and protection scope of the present application. Those skilled in the art should be able to understand that any equivalent substitutions and obvious changes made according to the present application description and drawings should be included in the protection scope of the present application.

Claims

1. A non-contact suspension mixing device, characterized in that, include: The basic fixing assembly consists of a flange (1) and an isolation sleeve (2). The isolation sleeve (2) is fixed to the bottom of the liquid container by welding (26). The flange (1) is used to fasten the reducer (22) and the isolation sleeve (2) together by bolts. The reducer (22) is connected to the motor (23) by bolts. The main drive shaft system is formed by reducing the speed of the motor (23) to a suitable stirring speed through the reducer (22), and then fastening the main shaft of the reducer (22) and the input shaft (18) through a rigid coupling (19). The main drive assembly consists of an input shaft (18), an active rotor housing (16), an active rotor cover (21), and an inner magnet (17). The active rotor housing (16) and the input shaft (18) are connected by bolts (5) and then the countersunk holes are spot welded. The active rotor cover (21) and the active rotor housing (16) are fixed by welding. The inner magnet (17) is bonded and installed in the magnetic groove of the active rotor housing (16). The suspension support system includes a support shaft (15), a wear-resistant bushing A (8), a suspension sleeve (9), a cap (10), a support magnet (12), and a suspension magnet (11). The support shaft (15) and the isolation sleeve (2) are fixedly connected by a threaded pair. The suspension magnet (11) is bonded to the space formed by the suspension sleeve (9) and the cap (10). The suspension sleeve (9) and the cap (10) are fixed together by welding. The support magnet (12) is installed in the cylindrical space formed by the support shaft (15) and the wear-resistant bushing A (8). The magnetic poles of the suspension magnet (11) and the support magnet (12) are opposite, and the suspension support is achieved by repulsion of like poles. The suspension stirring mechanism includes blades (7), suspension sleeve (9), wear-resistant bushing B (14), sleeve (13), cap (10), outer magnet (6), driven rotor housing (4) and driven rotor cover (3). The blades (7) are fixed to the suspension sleeve (9), sleeve (13) and driven rotor housing (4) by welding. The driven rotor housing (4) is welded to the driven rotor cover (3). The outer magnet (6) is bonded and installed in the magnetic groove of the driven rotor housing (4). Among them, the motor (23) adjusts the speed to a suitable stirring speed through the reducer (22), and the main shaft of the reducer is connected through the coupling (19) and drives the input shaft (18) and the main transmission assembly to rotate. The inner magnet (17) and the outer magnet (6) form a magnetic coupling to drive the suspension stirring mechanism to rotate. The suspension support system enables the suspension stirring mechanism to maintain a stable suspension state during dynamic operation. The wear-resistant bushing A (8) and the wear-resistant bushing B (14) form a sliding bearing, thereby realizing non-contact magnetic power transmission between the main transmission assembly and the suspension stirring mechanism. Rubber ring seal: The support shaft (15) and the wear-resistant bushing A (8) are clearance fit, and the support shaft (15) and the wear-resistant bushing A (8) are sealed and flexibly connected by a rubber ring (25); the wear-resistant bushing B (14) and the sleeve (13) are clearance fit, and the wear-resistant bushing B (14) and the sleeve (13) are sealed and flexibly connected by a rubber ring (24). This flexible connection can effectively reduce the vibration generated during the stirring process.

2. The non-contact suspension mixing device according to claim 1, characterized in that, Both the wear-resistant bushing A (8) and the wear-resistant bushing B (14) are made of silicon carbide to improve wear resistance and extend service life. At the same time, the two are in clearance fit and act as sliding bearings during the stirring process.

3. The non-contact suspension mixing device according to claim 1, characterized in that, The magnetic poles of the levitation magnet (11) and the support magnet (12) at the inner hole of the wear-resistant bushing A (8) are opposite, forming a magnetic levitation support structure with like poles repelling each other.

4. The non-contact suspension mixing device according to claim 1, characterized in that, The outer magnet (6) and inner magnet (17) are symmetrical multi-pole magnetic rings, using fan-shaped magnetic blocks with alternating N and S poles, and expanding the effective magnetic field coverage area through magnetic pole misalignment design.

5. The non-contact suspension mixing device according to claim 1, characterized in that, The blades (7) are arranged in a uniform manner of 3 to 6 blades, preferably 4 blades; the isolation sleeve (2) is a sealed structure used to isolate the physical contact between the main transmission component and the drive component to prevent cross-contamination.

6. The non-contact suspension mixing device according to claim 1, characterized in that, The support shaft (15) and the wear-resistant bushing A (8) are clearance fit, and the rubber ring (25) achieves a sealing and flexible connection between the support shaft (15) and the wear-resistant bushing A (8); the wear-resistant bushing B (14) and the sleeve (13) are clearance fit, and the rubber ring (24) achieves a sealing and flexible connection between the wear-resistant bushing B (14) and the sleeve (13). This connection method can effectively reduce the impact vibration on the wear-resistant bushing A (8) and the wear-resistant bushing B (14) during the stirring process.

7. The non-contact suspension mixing device according to claim 1, characterized in that, The connection between the active rotor housing (16) and the input shaft (18) is fastened with countersunk bolts (5), and then the countersunk holes are welded flat by spot welding. The active rotor cover and the active rotor housing (16) are welded and fixed structures. After welding, the weld seam / weld point is polished smooth.

8. The non-contact suspension mixing device according to claim 1, characterized in that, The servo motor works in conjunction with the driver to precisely adjust the rotation speed of the suspension stirring mechanism.

9. The non-contact suspension mixing device according to claim 1, characterized in that, The isolation sleeve (2) and the flange (1) are radially positioned by a clearance fit. The flange (1) and the reducer (22) are radially positioned by a clearance fit. The isolation sleeve (2), the flange (1) and the reducer are bolted together and have a circumferentially distributed structure to ensure positioning accuracy and sealing performance.

10. A non-contact suspension stirring method, characterized in that, Includes the following steps: Installation steps: First, install the support shaft (15), wear-resistant bushing A (8), rubber ring (25), and support magnet (12) on the isolation sleeve (2), and then weld the isolation sleeve (2) to the bottom of the liquid container; then, suspend the non-contact suspension stirring device above the isolation sleeve, and adjust the speed of the motor (23) to a suitable stirring speed through the reducer (22), and then connect the main shaft of the reducer (22) and the input shaft (18) through the coupling (19); Driving steps: Start the motor (23), which drives the reducer (22), input shaft (18) and active rotor housing (16) to rotate. The inner magnet (17) inside the active rotor housing (16) generates a rotating magnetic field, thereby driving the blades to rotate and achieve stirring. Magnetic coupling step: The inner magnet (17) and the outer magnet (6) set on the driven rotor housing (4) form a magnetic coupling, thereby driving the suspension stirring mechanism to rotate; Suspension support step: The suspension stirring mechanism is in a stable suspension state by the repulsive action between the like poles of the suspension magnet (11) installed on the support shaft (15) and the support magnet (12) in the inner hole of the wear-resistant bushing A (8); Stirring step: The blades (7) of the suspension stirring mechanism drive the liquid to form a vortex during rotation, thereby achieving liquid-liquid mixing or liquid-powder mixing; Among them, the wear-resistant bushing A (8) and the wear-resistant bushing B (14) form a sliding bearing to reduce friction and wear, and ensure that the power transmission between the main drive assembly and the suspension stirring mechanism is a non-contact magnetic transmission.

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