Magnetic suspension structure for rotating shaft

Abstract

The utility model relates to a magnetic suspension structure for a rotating shaft. The magnetic suspension structure comprises a box body; the driving box is fixed at the bottom of the box body; the driving shaft is rotationally mounted in the box body and penetrates through the driving box; and the magnetic suspension mechanism is arranged at the joint of the driving shaft and the box body and is used for suspending the driving shaft. According to the magnetic suspension structure for the rotating shaft, the magnetic suspension mechanism is arranged at the joint of the driving shaft and the box body, the driving shaft is supported in a suspension mode according to the magnetic suspension principle, the driving shaft is prevented from sinking under the influence of the gravity of the driving shaft when rotating, and the problems of heat, abrasion, dust and the like generated by friction are solved; therefore, energy loss and maintenance cost can be reduced, and the service life of equipment can be prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of magnetic levitation industry, specifically relating to a magnetic levitation structure for a rotating shaft. Background Technology

[0002] A shaft is an essential component for connecting product parts and is used during rotation to withstand both bending and torque. One end of the shaft is connected to a drive mechanism (such as a motor), and the other end is connected to the product part, transmitting the torque from the drive mechanism to the product part.

[0003] When the shaft is set vertically, it will be subjected to a downward pull under its own weight. Under the influence of this pull, the shaft connection is prone to sinking and deformation, which will not only affect the service life of the equipment, but also increase energy consumption and maintenance costs. Utility Model Content

[0004] This invention provides a magnetic levitation structure for a rotating shaft, which solves the problem that in the prior art, the rotating shaft connection is prone to sinking and deformation, which affects the service life of the equipment and increases energy consumption and maintenance costs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a magnetic levitation structure for a rotating shaft, comprising:

[0006] The box has a receiving space;

[0007] A drive housing, which is fixed to the bottom of the housing body;

[0008] A drive shaft, which is rotatably mounted inside the housing and extends through the drive housing;

[0009] A magnetic levitation mechanism, which is disposed within the receiving space and is used to levitate the drive shaft.

[0010] Ideally, the magnetic levitation mechanism includes a buoyancy stator fixed inside the housing and a buoyancy rotor axially adjustable on the drive shaft, the buoyancy rotor being suspended on the buoyancy stator.

[0011] Optimally, the magnetic levitation mechanism further includes a buoyancy fixed magnetic ring coaxially and equally spaced on the top of the buoyancy stator and a buoyancy moving magnetic ring fixed on the bottom of the buoyancy rotor, wherein the buoyancy moving magnetic ring is inserted between two radially adjacent layers of buoyancy fixed magnetic rings.

[0012] Optimally, the magnetic levitation mechanism further includes a fixed spacer ring fixed between two axially adjacent layers of buoyancy fixed magnetic rings and a dynamic spacer ring fixed between two axially adjacent layers of buoyancy moving magnetic rings.

[0013] Optimally, it also includes an adjustment plate axially adjustable on the drive shaft, the adjustment plate abutting against the side of the buoyancy rotor away from the buoyancy stator, the adjustment plate moving axially to adjust the buoyancy of the magnetic levitation mechanism.

[0014] Ideally, it also includes an adjusting nut screwed onto the drive shaft, the adjusting nut abutting against an adjusting plate.

[0015] Ideally, the magnetization directions of two axially adjacent buoyancy fixed magnetic rings are opposite, the magnetization directions of two axially adjacent buoyancy moving magnetic rings are opposite, and the magnetization direction of the upper buoyancy fixed magnetic ring is the same as that of the lower buoyancy moving magnetic ring.

[0016] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0017] This utility model's magnetic levitation structure for rotating shafts uses a magnetic levitation mechanism at the connection between the drive shaft and the housing to levitate and support the drive shaft. This prevents the drive shaft from sinking under its own weight when rotating, thus avoiding problems such as heat, wear, and dust generated by friction. This not only reduces energy consumption and maintenance costs but also increases the service life of the equipment. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the present invention;

[0019] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a cross-sectional view of the magnetic levitation mechanism of this utility model;

[0021] Figure 4 This is a diagram showing the magnetic field lines of the magnetic levitation mechanism of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Housing; 2. Drive box; 3. Drive shaft; 4. External thread; 5. Adjusting nut; 6. Adjusting plate; 7. Bearing; 8. Buoyancy stator; 9. Buoyancy rotor; 10. Buoyancy moving magnetic ring; 11. Buoyancy fixed magnetic ring; 12. Moving spacer ring; 13. Fixed spacer ring; 14. Inner magnetic ring; 15. Outer magnetic ring; 16. Slot. Detailed Implementation

[0024] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0025] like Figure 1The diagram shown is a cross-sectional view of the magnetic levitation structure for the rotating shaft of this invention. Utilizing the principle of magnetic levitation, the drive shaft 3 is suspended and supported, preventing it from sinking under its own weight, which would affect the entire device and reduce its lifespan. This levitation structure includes a housing 1, a drive housing 2, a drive shaft 3, an adjustment mechanism, and a magnetic levitation mechanism.

[0026] The drive box 2 is fixed to the bottom of the housing 1. The drive shaft 3 is rotatably installed inside the housing 1 and passes through the drive box 2. A drive mechanism is set on the top of the housing 1 to drive the drive shaft 3 to rotate (the drive mechanism can be a motor).

[0027] The bearing 7 is installed inside the housing 1, and the drive shaft 3 passes through the bearing 7. When the drive mechanism drives the drive shaft 3 to rotate, the bearing 7 can reduce the friction between the drive shaft 3 and the housing 1, thereby making the rotation smoother and reducing energy consumption.

[0028] This suspension structure can be applied not only in the rotary drive industry but also in the mixing industry. When applied in the mixing industry, a mixing shaft can be installed at the bottom of the drive box 2. The drive shaft 3 drives the mixing shaft to rotate, and the blades on the circumference of the mixing shaft complete the mixing of materials.

[0029] When there is only one stirring shaft and it is coaxial with the drive shaft 3, the stirring shaft and the drive shaft 3 can be directly connected by a coupling to transmit the torque of the drive shaft 3 to the stirring shaft. When there are multiple stirring shafts, in order to ensure the overall balance of the equipment, the stirring shaft is arranged around the outside of the drive shaft 3, and the stirring shaft and the drive shaft 3 can transmit torque by gear meshing or synchronous belt connection.

[0030] When using a gear meshing method, the driving gear is mounted on the drive shaft 3, and the driven gear is mounted on the stirring shaft. The driving gear and the driven gear mesh with each other. When the drive shaft 3 rotates, it drives the stirring shaft to rotate. (When using a gear meshing mechanism, only one driving gear needs to be installed on the drive shaft 3. The driven gear on the stirring shaft is mounted on the circumference of the driving gear and meshes with the driving gear.)

[0031] When a synchronous belt connection is used, the driving wheel is mounted on the drive shaft 3, the driven wheel is mounted on the stirring shaft, and the synchronous belt is wound around the driving wheel and the driven wheel. When the drive shaft 3 rotates, it drives the driving wheel to rotate, which in turn drives the driven wheel to rotate, ultimately realizing the rotation of the stirring shaft. (When a synchronous belt connection is used, multiple driving wheels are arranged axially on the drive shaft 3, and each driven wheel on the stirring shaft corresponds to a driving wheel, thereby avoiding the synchronous belts between each other.)

[0032] The magnetic levitation mechanism is set at the connection between the drive shaft 3 and the housing 1. Utilizing the principle of magnetic levitation, it supports the drive shaft 3 upwards, preventing the drive shaft 3 from sinking under its own weight and causing the connection between the drive shaft 3 and the housing 1 to deform downwards, thus avoiding damage to the equipment and reducing its service life.

[0033] like Figure 2 , 3 As shown, the magnetic levitation mechanism includes a buoyancy stator 8, a buoyancy rotor 9, a buoyancy moving magnetic ring 10, a buoyancy fixed magnetic ring 11, a moving spacer ring 12, a fixed spacer ring 13, an inner magnetic guide ring 14, an outer magnetic guide ring 15, and a slot 16. The buoyancy stator 8 is fixed to the inner bottom of the housing 1, and the buoyancy rotor 9 is sleeved on the drive shaft 3 and positioned above the buoyancy stator 8. Utilizing the principle of magnetic levitation, the buoyancy rotor 9 is suspended above the buoyancy stator 8, thereby supporting the drive shaft 3 upwards.

[0034] The buoyancy-fixed magnetic rings 11 are coaxially and equally spaced on the top of the buoyancy-fixed stator 8, and the spacer rings 13 are disposed between two axially adjacent layers of buoyancy-fixed magnetic rings 11. The spacer rings 13 are supported by non-magnetic materials, such as FR4 epoxy board. The spacer rings 13 separate the two axially adjacent layers of buoyancy-fixed magnetic rings 11, and prevent the magnetic fields between them from interfering with each other during magnetization.

[0035] The buoyancy moving magnetic ring 10 is fixed at the bottom of the buoyancy rotor 9. A dynamic spacer ring 12 is provided between two axially adjacent layers of buoyancy moving magnetic rings 10. The dynamic spacer ring 12 is supported by a non-magnetic material, such as FR4 epoxy board. The dynamic spacer ring 12 separates the two axially adjacent layers of buoyancy moving magnetic rings 10, so as to avoid mutual interference between the magnetic fields of the two during magnetization.

[0036] The number of axial layers of the buoyancy moving magnetic ring 10 is the same as the number of axial layers of the buoyancy fixed magnetic ring 11, and it is inserted between two radially adjacent layers of buoyancy fixed magnetic ring 11, so as to suspend the buoyancy rotor 9 by magnetic buoyancy. A slot 16 is formed between two radially adjacent layers of buoyancy fixed magnetic ring 11, and the buoyancy moving magnetic ring 10 is inserted into the slot 16.

[0037] In practical applications, to increase buoyancy, the diameter of the buoyancy moving magnetic ring 10 and the buoyancy fixed magnetic ring 11 can be increased, or the radial number of the buoyancy moving magnetic ring 10 and the buoyancy fixed magnetic ring 11 can be increased, or the axial number of the buoyancy moving magnetic ring 10 and the buoyancy fixed magnetic ring 11 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.

[0038] The inner magnetic ring 14 is fixed to the top of the buoyancy stator 8 and abuts against the inner sidewall of the inner ring buoyancy magnetic ring 11, while the outer magnetic ring 15 is fixed to the top of the buoyancy stator 8 and abuts against the outer sidewall of the outer ring buoyancy magnetic ring 11. By setting the inner magnetic ring 14 and the outer magnetic ring 15, the magnetic flux density in the air gap can be increased, and electromagnetic interference can also be suppressed.

[0039] like Figure 4 As shown, the positive and negative poles of the magnetic levitation mechanism are oriented. All magnetic rings are radially magnetized. The buoyancy moving magnetic ring 10 is inserted into the gap of the buoyancy fixed magnetic ring 11, with a gap between them to prevent friction and avoid affecting the magnetic levitation effect.

[0040] When the buoyancy rotor 9 sinks due to the load (weight), the lower buoyancy moving magnetic ring 10 is attracted upward by the upper buoyancy fixed magnetic ring 11, and simultaneously repelled upward by the lower buoyancy fixed magnetic ring 11; while the upper buoyancy moving magnetic ring 10 is repelled upward by the upper buoyancy fixed magnetic ring 11. Therefore, the buoyancy rotor 9 generates an upward buoyancy, which in turn supports the drive shaft 3 upward, preventing the drive shaft 3 from sinking under its own weight.

[0041] The adjustment mechanism includes an external thread 4, an adjusting nut 5, and an adjusting plate 6. The adjusting plate 6 is sleeved on the drive shaft 3 and abuts against the side of the buoyancy rotor 9 away from the buoyancy stator 8. The drive shaft 3 has an external thread 4 in the middle. 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 9 and the buoyancy stator 8 is adjusted; at the same time, the adjusting nut 5 abuts against the top of the adjusting plate 6 to prevent the buoyancy rotor 9 from shaking during rotation, thereby improving the rotational stability of the drive shaft 3 (the buoyancy rotor 9 and the drive shaft 3 are connected by an interference fit).

[0042] This utility model's magnetic levitation structure for rotating shafts uses a magnetic levitation mechanism at the connection between the drive shaft 3 and the housing 1. By utilizing the principle of magnetic levitation, the drive shaft 3 is levitated and supported. When the drive shaft 3 rotates, it avoids sinking under its own weight, thus avoiding problems such as heat, wear, and dust generated by friction. This not only reduces energy consumption and maintenance costs but also increases the service life of the equipment.

[0043] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A magnetic levitation structure for a rotating shaft, characterized in that, It includes: The box (1) has a receiving space; A drive box (2) is fixed to the bottom of the box body (1); A drive shaft (3) is rotatably mounted inside the housing (1) and passes through the drive housing (2); A magnetic levitation mechanism is disposed within the accommodating space and on the levitation drive shaft (3).

2. The magnetic levitation structure for a rotating shaft according to claim 1, characterized in that: The magnetic levitation mechanism includes a buoyancy stator (8) fixed inside the housing (1) and a buoyancy rotor (9) axially adjustable on the drive shaft (3), wherein the buoyancy rotor (9) is suspended on the buoyancy stator (8).

3. The magnetic levitation structure for a rotating shaft according to claim 2, characterized in that: The magnetic levitation mechanism also includes a buoyancy fixed magnetic ring (11) coaxially and equally spaced fixed on the top of the buoyancy stator (8) and a buoyancy moving magnetic ring (10) fixed on the bottom of the buoyancy rotor (9), wherein the buoyancy moving magnetic ring (10) is inserted between two radially adjacent layers of buoyancy fixed magnetic rings (11).

4. The magnetic levitation structure for a rotating shaft according to claim 3, characterized in that: The magnetic levitation mechanism also includes a fixed spacer ring (13) fixed between two axially adjacent buoyancy fixed magnetic rings (11) and a dynamic spacer ring (12) fixed between two axially adjacent buoyancy moving magnetic rings (10).

5. A magnetic levitation structure for a rotating shaft according to claim 1, characterized in that: It also includes an axially adjustable adjustment plate (6) disposed on the drive shaft (3), the adjustment plate (6) abutting against the side of the buoyancy rotor (9) away from the buoyancy stator (8), the adjustment plate (6) moving axially to adjust the buoyancy of the magnetic levitation mechanism.

6. A magnetic levitation structure for a rotating shaft according to claim 5, characterized in that: It also includes an adjusting nut (5) screwed onto the drive shaft (3), the adjusting nut (5) abutting against the adjusting plate (6).

7. The magnetic levitation structure for a rotating shaft according to claim 1, characterized in that: The magnetization directions of two axially adjacent buoyancy fixed magnetic rings (11) are opposite, the magnetization directions of two axially adjacent buoyancy moving magnetic rings (10) are opposite, and the magnetization direction of the upper buoyancy fixed magnetic ring (11) is the same as that of the lower buoyancy moving magnetic ring (10).

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