Magnetic suspension device for stirring

Abstract

The utility model relates to a magnetic suspension device for stirring, which comprises a driving box, a magnetic suspension device and a magnetic suspension device, the stirring shaft is rotatably mounted at the bottom of the driving box; the magnetic suspension mechanism is arranged in the accommodating space, and the magnetic suspension mechanism is used for enabling the stirring shaft in the rotating state to be in an axial suspension state. According to the magnetic suspension device for stirring, the magnetic suspension mechanism is arranged, the stirring shaft is supported upwards according to the magnetic suspension principle, the situation that the connecting position of the stirring shaft and the driving box deforms downwards due to the weight of the stirring shaft and the stirring blades is avoided, damage to equipment is avoided, and the service life of the equipment is prolonged; the waste of extra cost caused by shutdown maintenance is avoided, and meanwhile, the material stirring effect is also improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the mixing industry technical field, concretely relates to a magnetic suspension device for stirring. BACKGROUND

[0002] In the electrode manufacturing process of power battery, the positive electrode slurry is composed of binder, conductive agent and positive electrode material; and the negative electrode slurry is composed of binder and graphite carbon powder. The preparation of the positive and negative electrode slurries includes a series of processes such as mixing, dissolving and dispersing between liquid and liquid, liquid and solid materials. In the positive and negative electrode slurries, the dispersibility and uniformity of the granular active material directly affect the movement of ions between the two poles of the power battery, so the mixing and dispersion of the slurry of each pole piece material are crucial in the production of power battery.

[0003] In the stirring process, the stirring shaft and the stirring chamber are connected through the bearing. Under the influence of the self-gravity of the stirring shaft and the stirring blades on the peripheral surface of the stirring shaft, the connection between the stirring shaft and the stirring chamber tends to deform downward, which not only affects the stirring of the battery slurry below, but also causes damage to the equipment, reduces the service life of the equipment, and increases the production cost due to shutdown maintenance. SUMMARY

[0004] The utility model provides a magnetic suspension device for stirring, solves in the existing battery slurry stirring technique, under the influence of the self-gravity of the stirring shaft and the stirring blades on the peripheral surface of the stirring shaft, the connection between the stirring shaft and the stirring chamber tends to deform downward, which not only affects the stirring of the battery slurry below, but also causes damage to the equipment.

[0005] To achieve the above purpose, the utility model adopts the technical scheme of a magnetic suspension device for stirring, which comprises:

[0006] A drive box having a containing space;

[0007] A stirring shaft rotatably mounted at the bottom of the drive box;

[0008] A magnetic suspension mechanism arranged in the containing space, which is used to make the stirring shaft in a rotating state in an axial suspension state.

[0009] Optimally, the magnetic suspension mechanism is a buoyancy suspension assembly or a repulsive force suspension assembly or a buoyancy suspension assembly and a repulsive force suspension assembly.

[0010] Optimally, the repulsion suspension assembly comprises a repulsion stator fixed at the bottom of the drive box, a repulsion rotor axially adjustably arranged on the stirring shaft, a repulsion stator magnetic ring fixed on the side of the repulsion stator close to the repulsion rotor, and a repulsion moving magnetic ring fixed on the side of the repulsion rotor close to the repulsion stator, the magnetic poles of the repulsion stator magnetic ring and the repulsion moving magnetic ring are opposite.

[0011] Optimally, the repulsion suspension assembly comprises a repulsion stator fixed at the bottom of the drive box, a repulsion rotor axially adjustably arranged on the stirring shaft, a repulsion stator magnetic ring fixed on the side of the repulsion stator close to the repulsion rotor, and a repulsion moving magnetic ring fixed on the side of the repulsion rotor close to the repulsion stator, the magnetic poles of the repulsion stator magnetic ring and the repulsion moving magnetic ring are opposite.

[0012] Optimally, the repulsion suspension assembly comprises a repulsion stator fixed at the bottom of the drive box, a repulsion rotor axially adjustably arranged on the stirring shaft, a repulsion stator magnetic ring fixed on the side of the repulsion stator close to the repulsion rotor, and a repulsion moving magnetic ring fixed on the side of the repulsion rotor close to the repulsion stator, the magnetic poles of the repulsion stator magnetic ring and the repulsion moving magnetic ring are opposite.

[0013] Optimally, the repulsion suspension assembly comprises a repulsion stator fixed at the bottom of the drive box, a repulsion rotor axially adjustably arranged on the stirring shaft, a repulsion stator magnetic ring fixed on the side of the repulsion stator close to the repulsion rotor, and a repulsion moving magnetic ring fixed on the side of the repulsion rotor close to the repulsion stator, the magnetic poles of the repulsion stator magnetic ring and the repulsion moving magnetic ring are opposite.

[0014] Optimally, it further comprises a drive shaft rotatably installed in the drive box, a drive mechanism connecting the drive shaft and the stirring shaft, and an adjusting mechanism arranged on the drive shaft and used for adjusting the buoyancy of the magnetic suspension mechanism.

[0015] Optimally, the adjusting mechanism comprises an adjusting plate sleeved on the stirring shaft and abutting against the top of the magnetic suspension mechanism, the adjusting plate moves axially to adjust the buoyancy of the magnetic suspension mechanism.

[0016] Optimally, the magnetization directions of the two axially adjacent layers of the repulsion stator magnetic ring are opposite, the magnetization directions of the two axially adjacent layers of the repulsion moving magnetic ring are opposite, and the magnetization direction of the upper repulsion stator magnetic ring is the same as that of the lower repulsion moving magnetic ring.

[0017] Thanks to the above technical scheme, the utility model has the following advantages compared with the prior art:

[0018] The magnetic suspension device for stirring of the utility model avoids the deformation of the connection between the stirring shaft and the drive box caused by the weight of the stirring shaft and the stirring blade, avoids the damage to the equipment, prolongs the service life of the equipment, avoids the waste of additional cost caused by the maintenance during shutdown, and improves the stirring effect of the material. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a sectional view of the first embodiment of the utility model.

[0020] Figure 2 This is a cross-sectional view of the second embodiment of the present invention;

[0021] Figure 3 This utility model Figure 1 Enlarged view of point A in the middle;

[0022] Figure 4 This utility model Figure 2 Enlarged view of point B in the middle;

[0023] Figure 5 This utility model Figure 3 The positive and negative directions;

[0024] Figure 6 This utility model Figure 4 The positive and negative directions;

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Drive box; 2. Drive shaft; 3. Stirring main shaft; 4. Stirring secondary shaft; 5. Adjusting nut; 6. Adjusting plate; 7. Buoyancy stator; 8. Buoyancy rotor; 9. Buoyancy moving magnetic ring; 10. Buoyancy fixed magnetic ring; 11. Moving spacer ring; 12. Fixed spacer ring; 13. Inner magnetic ring; 14. Outer magnetic ring; 15. Slot; 16. Repulsive stator; 17. Repulsive rotor; 18. Fixed spacer ring; 19. Moving spacer ring; 20. Repulsive fixed magnetic ring; 21. Repulsive moving magnetic ring; 22. Magnetic gap; 23. Upper magnetic ring slot; 24. Lower magnetic ring slot. Detailed Implementation

[0027] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0028] Example 1

[0029] like Figure 1 The figure shown is a cross-sectional view of the magnetic levitation device for mixing according to this utility model. This structure is commonly used in the mixing industry. It uses the principle of magnetic levitation to support the mixing shaft upwards, so as to prevent the weight of the mixing shaft and the mixing blades from causing the connection between the mixing shaft and the drive box 1 to deform downwards, which would not only affect the mixing of the material below, but also affect the service life of the equipment.

[0030] The magnetic levitation device includes a drive housing 1, a drive shaft 2, a stirring shaft, an adjustment mechanism, a magnetic levitation mechanism, and a drive mechanism. The drive shaft 2 is mounted inside the drive housing 1 via bearings. The bearings reduce friction between the drive shaft 2 and the drive housing 1, resulting in smoother rotation and reduced energy consumption. A motor is mounted on the top of the drive housing 1, and the drive shaft 2 is connected to the output end of the motor, which drives the drive shaft 1 to rotate (the motor is not shown in the figure).

[0031] The stirring shaft penetrates the driving box 2 and is connected with the driving shaft 1 through a driving mechanism. When the motor drives the driving shaft 2 to rotate, the torque is transmitted to the stirring shaft through the driving mechanism, and then the stirring shaft is driven to rotate, and the stirring of the materials below is completed by the stirring blades on the circumferential surface of the stirring shaft.

[0032] When the stirring shaft is one and coaxially arranged with the driving shaft 2, the driving mechanism can adopt a coupling, that is, the coupling is used to connect the driving shaft 2 and the stirring shaft. When the driving shaft 2 rotates, the stirring shaft is driven to rotate synchronously through the coupling, so as to realize the stirring of the materials below.

[0033] When the number of stirring shafts is multiple, in order to ensure the balance of the whole device, the stirring shafts are arranged around the outside of the driving shaft 2. The driving mechanism can adopt a gear meshing mechanism or a synchronous belt mechanism. When the gear meshing mechanism is adopted, the driving gear is sleeved on the driving shaft 2, the driven gear is sleeved on the stirring shaft, and the driving gear is meshed with the driven gear. When the driving shaft 2 rotates, the stirring shaft is driven to rotate by the gear meshing (when the gear meshing mechanism is adopted, one driving gear is installed on the driving shaft 2. The driven gear on the stirring shaft is arranged around the circumferential surface of the driving gear and is meshed with the driving gear).

[0034] When the synchronous belt connection is adopted, the driving wheel is sleeved on the driving shaft 2, the driven wheel is sleeved on the stirring shaft, and the synchronous belt is wound on the driving wheel and the driven wheel. When the driving shaft 2 rotates, the driving wheel is driven to rotate, and then the driven wheel is driven to rotate by the synchronous belt, so as to finally realize the rotation of the stirring shaft (when the synchronous belt mechanism is adopted, a plurality of driving wheels are arranged on the driving shaft 2 in the axial direction. The driven wheel on each stirring shaft corresponds to one driving wheel, so as to avoid the synchronous belt between them).

[0035] In the embodiment, the magnetic suspension mechanism adopts a buoyancy suspension assembly. As shown in Figure 3 The buoyancy suspension assembly is arranged at the connection between the stirring shaft and the driving box 1. By using the principle of magnetic suspension, the stirring shaft is upwardly supported, so as to avoid the sinking of the stirring shaft under the influence of its own gravity, thereby avoiding the deformation of the connection between the stirring shaft and the driving box 1 downwardly, avoiding the damage to the device and reducing the service life of the device.

[0036] As shown in Figure 3 The buoyancy suspension assembly includes a buoyancy stator 7, a buoyancy rotor 8, a buoyancy moving magnetic ring 9, a buoyancy fixed magnetic ring 10, a moving spacer ring 11, a fixed spacer ring 12, an inner magnetic conducting ring 13, an outer magnetic conducting ring 14 and a plug slot 15. The buoyancy stator 7 is fixed to the inner bottom of the driving box 1, and the buoyancy rotor 8 is sleeved on the stirring shaft and arranged above the buoyancy stator 7. By using the principle of magnetic suspension, the buoyancy rotor 8 is suspended above the buoyancy stator 7, and then the stirring shaft is upwardly supported.

[0037] The buoyancy-stabilized magnetic rings 10 are coaxially and equally spaced on the top of the buoyancy-stabilized stator 7, and the spacer rings 12 are disposed between two axially adjacent layers of buoyancy-stabilized magnetic rings 10. The spacer rings 12 are supported by non-magnetic materials, such as FR4 epoxy board. The spacer rings 12 separate the two axially adjacent layers of buoyancy-stabilized magnetic rings 10, and prevent the magnetic fields between them from interfering with each other during magnetization.

[0038] The buoyancy moving magnetic ring 9 is fixed at the bottom of the buoyancy rotor 8. A dynamic spacer ring 11 is provided between two axially adjacent layers of buoyancy moving magnetic rings 9. The dynamic spacer ring 11 is supported by a non-magnetic material, such as FR4 epoxy board. The dynamic spacer ring 11 separates the two axially adjacent layers of buoyancy moving magnetic rings 9 to avoid mutual interference of the magnetic fields between them during magnetization.

[0039] The number of axial layers of the buoyancy moving magnetic ring 9 is the same as the number of axial layers of the buoyancy fixed magnetic ring 10, and it is inserted between two radially adjacent layers of buoyancy fixed magnetic ring 10, so as to suspend the buoyancy rotor 8 by magnetic buoyancy. A slot 15 is formed between two radially adjacent layers of buoyancy fixed magnetic ring 10, and the buoyancy moving magnetic ring 9 is inserted into the slot 15.

[0040] In practical applications, to increase buoyancy, the diameters of the buoyancy moving magnetic ring 9 and the buoyancy fixed magnetic ring 10 can be increased, or the radial number of the buoyancy moving magnetic ring 9 and the buoyancy fixed magnetic ring 10 can be increased, or the axial number of the buoyancy moving magnetic ring 9 and the buoyancy fixed magnetic ring 10 can be increased. Therefore, a three-dimensional reinforcement system can achieve high buoyancy suspension. Ordinary configurations of like-pole repulsion or dissimilar-pole attraction are only two-dimensional reinforcement systems.

[0041] The inner magnetic ring 13 is fixed to the top of the buoyancy stator 7 and abuts against the inner sidewall of the inner ring buoyancy magnetic ring 10, while the outer magnetic ring 14 is fixed to the top of the buoyancy stator 7 and abuts against the outer sidewall of the outer ring buoyancy magnetic ring 10. By setting the inner magnetic ring 13 and the outer magnetic ring 14, the magnetic flux density in the air gap can be increased, and electromagnetic interference can also be suppressed.

[0042] like Figure 5 As shown, the positive and negative poles of the buoyancy suspension component are oriented. All magnetic rings are radially magnetized. The buoyancy moving magnetic ring 9 is inserted into the gap of the buoyancy fixed magnetic ring 10, with a gap between them to prevent friction and avoid affecting the magnetic levitation effect.

[0043] When the buoyancy rotor 8 sinks due to the load (weight), the lower buoyancy moving magnetic ring 9 is attracted upward by the upper buoyancy fixed magnetic ring 10, and simultaneously repelled upward by the lower buoyancy fixed magnetic ring 10; while the upper buoyancy moving magnetic ring 9 is repelled upward by the upper buoyancy fixed magnetic ring 10. Therefore, the buoyancy rotor 8 generates an upward buoyancy, which in turn supports the stirring shaft upward, preventing the stirring shaft from sinking under its own weight.

[0044] The adjustment mechanism includes an adjusting nut 5 and an adjusting plate 6. The adjusting plate 6 is sleeved on the stirring shaft and abuts against the side of the buoyancy rotor 8 away from the buoyancy stator 7. An external thread is provided in the middle of the drive shaft. The adjusting nut 5 is screwed onto the drive shaft 3 and abuts against the adjusting plate 6. By screwing the adjusting nut 5, the assembly depth of the buoyancy rotor 8 and the buoyancy stator 7 is adjusted; at the same time, the adjusting nut 5 abuts against the top of the adjusting plate 6 to prevent the buoyancy rotor 8 from shaking during rotation, thereby improving the stability of the stirring shaft rotation (the buoyancy rotor 8 and the stirring shaft are connected by an interference fit).

[0045] Example 2

[0046] The technical solution of Embodiment 2 is basically the same as that of Embodiment 1, the only difference being the magnetic levitation mechanism. Figure 2 As shown, in this embodiment, the magnetic levitation mechanism employs a repulsive levitation component. (As indicated...) Figure 4 As shown, the repulsive suspension assembly includes a repulsive stator 16, a repulsive rotor 17, a fixed magnetic isolation ring 18, a movable magnetic isolation ring 19, a repulsive fixed magnetic ring 20, a repulsive movable magnetic ring 21, a magnetic gap 22, an upper magnetic ring groove 23, and a lower magnetic ring groove 24. The repulsive stator 16 is fixed to the inner bottom of the drive housing 1, and the repulsive rotor 17 is sleeved on the stirring shaft and located above the repulsive stator 16. The lower magnetic ring groove 24 is formed at the top of the repulsive stator 16, and the upper magnetic ring groove 23 is formed at the bottom of the repulsive rotor 17. The fixed magnetic isolation ring 18 is fixed in the lower magnetic ring groove 24 by fastening bolts and spring washers, and the movable magnetic isolation ring 19 is fixed in the upper magnetic ring groove 23 by fastening bolts and spring washers. By setting the magnetic ring grooves, the magnetic isolation rings are locked in the corresponding magnetic ring grooves during installation, which facilitates the fixing of the magnetic isolation rings and thus limits the movement of the internal magnetic rings.

[0047] A fixed repulsive magnetic ring 20 is fixed inside a fixed insulating magnetic ring 18, and a movable repulsive magnetic ring 21 is fixed inside a movable insulating magnetic ring 19. Due to the magnetic repulsion between the fixed repulsive magnetic ring 20 and the movable repulsive magnetic ring 21, a magnetic gap 22 is formed between them. The insulating magnetic rings are typically made of ferrite material and possess unique magnetic field shielding properties, effectively absorbing and reducing electromagnetic radiation, thereby minimizing interference with surrounding equipment.

[0048] like Figure 6 As shown, the positive and negative poles of the repulsive fixed magnetic ring 20 and the repulsive moving magnetic ring 21 are oriented. Due to the magnetic repulsion between the repulsive fixed magnetic ring 20 and the repulsive moving magnetic ring 21, the repulsive fixed magnetic ring 20 will lift the repulsive moving magnetic ring 21 (the repulsive force can reach 200kg), and at the same time lift the entire stirring shaft. Utilizing the principle of magnetic repulsion, the stirring shaft and stirring blades are supported upwards, preventing the weight of the stirring shaft and stirring blades from causing the connection between the stirring shaft and the drive box to deform downwards. This would not only affect the stirring process but also damage the equipment, reduce its service life, and increase production costs due to downtime for maintenance.

[0049] Embodiment three

[0050] The technical scheme of embodiment three is basically same with that of embodiment one, the only difference is the magnetic suspension mechanism, in this embodiment, the magnetic suspension mechanism adopts the combination of buoyancy suspension assembly and repulsion suspension assembly.

[0051] In this embodiment, the stirring shaft is divided into stirring main shaft 3 and stirring auxiliary shaft 4, the stirring main shaft 3 is oppositely arranged, the stirring auxiliary shaft 4 is also oppositely arranged, wherein the stirring main shaft 3 is connected with the driving box 1 through the buoyancy suspension assembly, and the stirring auxiliary shaft 4 is connected with the driving box 1 through the repulsion suspension assembly.

[0052] The magnetic suspension device for stirring of the utility model sets up magnetic suspension mechanism, uses magnetic suspension principle to support the stirring shaft upward, avoids the weight of the stirring shaft and stirring blade to cause the connection of the stirring shaft and the driving box 1 to deform downward, avoids damaging the equipment, improves the service life of the equipment, avoids the waste of additional cost caused by shutdown maintenance, also improves the stirring effect of the material.

[0053] The above embodiment is only for illustrating the technical concept and characteristics of the utility model, its purpose is to let the person skilled in this technology understand the content of the utility model and implement it, and it cannot limit the protection scope of the utility model. Any equivalent change or modification according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.

Claims

1. A magnetic levitation device for stirring, characterized in that, It includes: A drive box (1) having a receiving space; A stirring shaft is rotatably mounted on the bottom of the drive housing (1); A magnetic levitation mechanism is disposed within the accommodating space, and the magnetic levitation mechanism is used to keep the rotating stirring shaft in an axially suspended state.

2. The magnetic levitation device for stirring according to claim 1, characterized in that: The magnetic levitation mechanism is a buoyancy suspension component, a repulsion suspension component, or a combination of buoyancy suspension and repulsion suspension components.

3. The magnetic levitation device for stirring according to claim 2, characterized in that: The buoyancy suspension assembly includes a buoyancy stator (7) fixed at the bottom of the drive box (1), a buoyancy rotor (8) axially adjustable on the stirring shaft, a buoyancy fixed magnetic ring (10) coaxially and equally spaced fixed at the top of the buoyancy stator (7), and a buoyancy moving magnetic ring (9) fixed at the bottom of the buoyancy rotor (8). The buoyancy moving magnetic ring (9) is inserted between two radially adjacent layers of the buoyancy fixed magnetic ring (10).

4. A magnetic levitation device for stirring according to claim 2, characterized in that: The repulsive suspension assembly includes a repulsive stator (16) fixed at the bottom of the drive box (1), a repulsive rotor (17) axially adjustable on the stirring shaft, a repulsive fixed magnetic ring (20) fixed on the side of the repulsive stator (16) near the repulsive rotor (17), and a repulsive moving magnetic ring (21) fixed on the side of the repulsive rotor (17) near the repulsive stator (16). The magnetic poles of the opposite sides of the repulsive fixed magnetic ring (20) and the repulsive moving magnetic ring (21) are the same.

5. A magnetic levitation device for stirring according to claim 3, characterized in that: The buoyancy suspension assembly also includes a fixed spacer ring (12) fixed between two axially adjacent layers of the buoyancy fixed magnetic ring (10) and a dynamic spacer ring (11) fixed between two axially adjacent layers of the buoyancy moving magnetic ring (9).

6. A magnetic levitation device for stirring according to claim 4, characterized in that: The repulsive suspension assembly also includes a fixed isolation magnetic ring (18) fixed on the top of the repulsive stator (16) and abutting against the repulsive fixed magnetic ring (20), and a dynamic isolation magnetic ring (19) fixed on the bottom of the repulsive rotor (17) and abutting against the repulsive moving magnetic ring (21).

7. A magnetic levitation device for stirring according to claim 1, characterized in that: It also includes a drive shaft (2) rotatably mounted in the drive housing (1), a drive mechanism connecting the drive shaft (2) and the stirring shaft, and an adjustment mechanism disposed on the drive shaft (2) for adjusting the buoyancy of the magnetic levitation mechanism.

8. A magnetic levitation device for stirring according to claim 7, characterized in that: The adjustment mechanism includes an adjustment plate (6) sleeved on the stirring shaft and abutting the top of the magnetic levitation mechanism. The adjustment plate (6) moves axially to adjust the buoyancy of the magnetic levitation mechanism.

9. A magnetic levitation device for stirring according to claim 5, characterized in that: The magnetization directions of the two axially adjacent buoyancy fixed magnetic rings (10) are opposite, the magnetization directions of the two axially adjacent buoyancy moving magnetic rings (9) are opposite, and the magnetization direction of the upper buoyancy fixed magnetic ring (10) is the same as that of the lower buoyancy moving magnetic ring (9).

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