Magnetic driver with axial magnetic suspension support

Abstract

The utility model discloses a magnetic driver with an axial magnetic suspension support, which comprises a bearing seat, a rotating shaft arranged in the bearing seat in a penetrating manner, and magnetic suspension units symmetrically distributed at two axial ends of the rotating shaft, the magnetic suspension unit is composed of a stator magnetic ring fixed on the bearing seat and a rotor magnetic ring fixed on the rotating shaft, the rotating shaft is sleeved with the shaft sleeve, the radial sliding bearing is embedded between the bearing seat and the shaft sleeve, the axial sliding bearing is arranged at the tail end of the rotating shaft, and the rotor magnetic ring is fixed on the rotating shaft. Corresponding to the axial baffle ring fixed at the bottom of the bearing seat, the top of the bearing seat is fixedly provided with a gland through a locking nut; according to the utility model, stable and efficient axial supporting force can be provided, and effective protection measures and high cleanliness are provided, so that the performance of the magnetic driver can be obviously improved, the service life of the magnetic driver can be obviously prolonged, and the requirements of wider industries can be met.

Description

Technical Field

[0001] This utility model relates to the field of transmission technology, and more specifically to a magnetic transmission device with axial magnetic levitation support. Background Technology

[0002] In the design and manufacture of magnetic drives, the stability and reliability of axial support are crucial to ensuring the overall performance of the drive.

[0003] Traditional axial support methods typically rely on mechanical contact or friction, which not only easily generates wear and heat but also leads to uneven distribution of support force due to imperfections in the contact surface, thus affecting the efficiency and lifespan of the drive. Furthermore, in industries requiring high-cleanliness environments, such as pharmaceuticals and semiconductor manufacturing, traditional axial support methods often fail to meet cleanliness requirements. Particles and impurities generated by mechanical contact and friction can contaminate the working environment, threatening product quality. To overcome the shortcomings of traditional axial support methods, magnetic levitation technology has gradually been introduced into the design of magnetic drives. Magnetic levitation technology utilizes magnetic force to achieve non-contact support, thereby avoiding the problems caused by mechanical contact and friction. However, how to achieve stable and efficient axial magnetic levitation support in magnetic drives remains a technical challenge that needs to be solved. Therefore, this invention proposes a magnetic drive with axial magnetic levitation support. Summary of the Invention

[0004] The purpose of this invention is to provide a magnetic drive with axial magnetic levitation support, which can provide stable and efficient axial support force, as well as effective protection measures and high cleanliness characteristics, thereby significantly improving the performance and service life of the magnetic drive and meeting the needs of a wider range of industries.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A magnetic drive with axial magnetic levitation support includes a bearing housing, a rotating shaft passing through the bearing housing, and magnetic levitation units symmetrically distributed at both ends of the rotating shaft. The magnetic levitation unit consists of a stator magnetic ring fixed on the bearing housing and a rotor magnetic ring fixed on the rotating shaft. The stator magnetic ring and the rotor magnetic ring provide non-contact axial support to the rotating shaft through magnetic repulsion. A bushing is fitted outside the rotating shaft. A radial sliding bearing is embedded in the gap between the bearing housing and the bushing. An axial sliding bearing is located at the end of the rotating shaft, corresponding to an axial retaining ring fixed at the bottom of the bearing housing. A pressure cap is fixed to the top of the bearing housing by a locking nut.

[0007] By adopting the above technical solution, this utility model has the following advantages:

[0008] The magnetic levitation unit of this invention generates axial repulsion through the unidirectional repulsion of the magnetic poles between the stator and rotor magnetic rings, providing bidirectional stable support for the rotating shaft. The radial sliding bearing of this invention creates a small gap between the magnetic levitation unit and the bushing, providing radial damping and effectively preventing unnecessary contact between the axial magnetic rings. The axial sliding bearing, in conjunction with the axial retaining ring, restricts the axial displacement of the rotating shaft, preventing damage to the axial magnetic rings due to excessive axial load, thus effectively ensuring the safety and reliability of the entire transmission.

[0009] Furthermore, the rotor magnetic ring and the stator magnetic ring form a magnetic repulsion structure with an adjustable gap.

[0010] By adopting the above technical solution, this utility model has the following advantages:

[0011] The magnetic repulsion structure of this invention ensures that when the rotating shaft is subjected to axial disturbance and moves upward, the gap between the upper magnetic levitation units decreases and the repulsion increases, while the gap between the lower magnetic levitation units increases and the repulsion decreases, forming a downward restoring force. When the rotating shaft is subjected to axial disturbance and moves downward, the gap between the lower magnetic levitation units decreases and the repulsion increases, while the gap between the upper magnetic levitation units increases and the repulsion decreases, forming an upward restoring force, thereby stabilizing the rotating shaft.

[0012] Furthermore, a radial clearance is provided between the radial sliding bearing and the bushing.

[0013] By adopting the above technical solution, this utility model has the following advantages:

[0014] The radial clearance of this invention allows the radial sliding bearing to provide a corrective force through the clearance when the shaft oscillates radially, preventing the magnetic levitation unit from contacting.

[0015] Furthermore, the locking nut is fixed to the top of the rotating shaft, and the pressure cap and the pressure cap spacer located inside the pressure cap are fastened by a threaded connection. The pressure cap is provided with a labyrinth sealing structure.

[0016] By adopting the above technical solution, this utility model has the following advantages:

[0017] The pressure cap spacer and labyrinth sealing structure of this utility model serve to seal the pressure cap and bearing seat, as well as the pressure cap and rotating shaft.

[0018] Furthermore, the labyrinth sealing structure of the gland includes alternating annular protrusions and grooves.

[0019] By adopting the above technical solution, this utility model has the following advantages:

[0020] The alternating annular protrusions and grooves of this invention can effectively prevent external dust and impurities from entering the transmission, maintaining its cleanliness, thereby effectively improving the operational stability and service life of this invention.

[0021] Furthermore, an external magnetic spacer is provided between the radial sliding bearing and the bearing housing.

[0022] By adopting the above technical solution, this utility model has the following advantages:

[0023] The outer magnetic separator of this invention is located on the outside of the stator magnetic ring, and serves to isolate the magnetic field and fix the position of the magnetic ring. Attached Figure Description

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

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Reference numerals in the attached drawings: 1. Bearing housing; 2. Axial retaining ring; 3. Rotor magnetic ring; 4. Outer magnetic spacer; 5. Pressure cover spacer; 6. Pressure cover; 7. Locking nut; 8. Shaft sleeve; 9. Radial sliding bearing; 10. Stator magnetic ring; 11. Axial sliding bearing; 12. Rotating shaft; 13. Labyrinth seal structure. Detailed Implementation

[0027] like Figure 1 As shown in this specific embodiment, a magnetic drive with axial magnetic levitation support includes a bearing housing 1, a rotating shaft 12 disposed through the bearing housing 1, and magnetic levitation units symmetrically distributed at both ends of the rotating shaft 12. Each magnetic levitation unit consists of a stator magnetic ring 10 fixed to the bearing housing 1 and a rotor magnetic ring 3 fixed to the rotating shaft 12. The stator magnetic ring 10 and the rotor magnetic ring 3 provide non-contact axial support to the rotating shaft 12 through magnetic repulsion. A bushing 8 is fitted onto the outside of the rotating shaft 12. A radial sliding bearing 9 is embedded in the gap between the bearing housing 1 and the bushing 8. An axial sliding bearing 11 is disposed on the rotating shaft 12. At the end of shaft 12, corresponding to the axial retaining ring 2 fixed to the bottom of bearing housing 1, a pressure cap 6 is fixed to the top of bearing housing 1 by a locking nut 7; the rotor magnetic ring 3 and the stator magnetic ring 10 form an adjustable gap magnetic repulsion structure; a radial gap is provided between the radial sliding bearing 9 and the bushing 8; the locking nut 7 is fixed to the top of the rotating shaft 12, and the pressure cap 6 and the pressure cap spacer 5 located inside the pressure cap 6 are fastened by threaded connection; a labyrinth seal structure 13 is provided inside the pressure cap 6; the labyrinth seal structure 13 of the pressure cap 6 includes alternating annular protrusions and grooves; an outer magnetic spacer 4 is provided between the radial sliding bearing 9 and the bearing housing 1.

[0028] Through the above configuration, the magnetic levitation unit of this invention provides bidirectional stable support for the rotating shaft 12 by generating axial repulsion through the unidirectional repulsion of the magnetic poles between the stator magnetic ring 10 and the rotor magnetic ring 3. The radial sliding bearing 9 of this invention creates a small gap between the magnetic levitation unit and the bushing 8, providing radial damping and effectively preventing unnecessary contact between the axial magnetic rings. The axial sliding bearing 11, in conjunction with the axial retaining ring 2, restricts the axial displacement of the rotating shaft 12, preventing damage to the axial magnetic rings due to excessive axial load, effectively ensuring the safety and reliability of the entire transmission. The magnetic repulsion structure of this invention ensures that when the rotating shaft 12 is subjected to axial disturbance and moves upward, the gap between the upper magnetic levitation units decreases and the repulsion increases, while the gap between the lower magnetic levitation units increases and the repulsion decreases, resulting in a downward recovery. When the rotating shaft 12 is subjected to axial disturbance and moves downward, the gap of the lower magnetic levitation unit decreases and the repulsive force increases, while the gap of the upper magnetic levitation unit increases and the repulsive force decreases, forming an upward restoring force, thereby stabilizing the rotating shaft 12. The radial gap setting of this utility model allows the radial sliding bearing 9 to provide a corrective force through the gap when the rotating shaft 12 oscillates radially, preventing the magnetic levitation units from contacting each other. The pressure cover spacer 5 and the labyrinth seal structure 13 of this utility model seal the pressure cover 6 and the bearing seat 1, as well as the pressure cover 6 and the rotating shaft 12. The alternating annular protrusions and grooves of this utility model can effectively prevent external dust and impurities from entering the transmission, maintaining its cleanliness, thereby effectively improving the operational stability and service life of this utility model. The outer magnetic spacer 4 of this utility model is located on the outside of the stator magnetic ring 10, serving to isolate the magnetic field and fix the position of the magnetic ring.

[0029] Working principle: During use, when the rotating shaft 12 is subjected to an upward axial disturbance, causing it to move upward, the gap between the upper magnetic levitation units decreases accordingly, increasing the repulsive force. Simultaneously, the gap between the lower magnetic levitation units increases, decreasing the repulsive force. This generates a downward thrust on the rotating shaft 12, causing it to move downward. When the rotating shaft 12 is subjected to a downward axial disturbance, causing it to move downward, the gap between the lower magnetic levitation units decreases accordingly, increasing the repulsive force. Simultaneously, the gap between the upper magnetic levitation units increases, decreasing the repulsive force, creating an upward restoring force, causing the rotating shaft 12 to generate... An upward thrust moves the rotating shaft 12 upward, thus maintaining its stable state. When the rotating shaft 12 oscillates radially due to various reasons, causing radial displacement of the magnetic levitation unit, the radial sliding bearing 9 can respond quickly, providing the necessary radial force to correct the oscillation, ensuring the stability of the system operation, and effectively preventing unnecessary contact between the magnetic rings. At the same time, when the rotating shaft 12 is subjected to excessive axial load, the axial sliding bearing 11 and the axial retaining ring 2 can quickly play their role, limiting the axial displacement of the rotating shaft 12, thereby preventing damage to the magnetic rings due to excessive axial load and ensuring the safety and reliability of the entire transmission system.

[0030] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A magnetic drive with axial magnetic levitation support, characterized in that, The device includes a bearing housing (1), a rotating shaft (12) that runs through the bearing housing (1), and magnetic levitation units symmetrically distributed at both ends of the rotating shaft (12). The magnetic levitation units consist of a stator magnetic ring (10) fixed on the bearing housing (1) and a rotor magnetic ring (3) fixed on the rotating shaft (12). The stator magnetic ring (10) and the rotor magnetic ring (3) provide non-contact axial support to the rotating shaft (12) through magnetic repulsion. A bushing (8) is fitted outside the rotating shaft (12). A radial sliding bearing (9) is embedded in the gap between the bearing housing (1) and the bushing (8). An axial sliding bearing (11) is located at the end of the rotating shaft (12) and corresponds to an axial retaining ring (2) fixed at the bottom of the bearing housing (1). A pressure cap (6) is fixed on the top of the bearing housing (1) by a locking nut (7).

2. A magnetic drive with axial magnetic levitation support according to claim 1, characterized in that, The rotor magnetic ring (3) and the stator magnetic ring (10) form a magnetic repulsion structure with adjustable gap.

3. A magnetic drive with axial magnetic levitation support according to claim 1, characterized in that, A radial clearance is provided between the radial sliding bearing (9) and the bushing (8).

4. A magnetic drive with axial magnetic levitation support according to claim 1, characterized in that, The locking nut (7) is fixed to the top of the rotating shaft (12) and the pressure cap (6) and the pressure cap spacer (5) located inside the pressure cap (6) are fastened by threaded connection. The pressure cap (6) is provided with a labyrinth sealing structure (13).

5. A magnetic drive with axial magnetic levitation support according to claim 4, characterized in that, The labyrinth sealing structure (13) of the gland (6) includes alternating annular protrusions and grooves.

6. A magnetic drive with axial magnetic levitation support according to claim 1, characterized in that, An outer magnetic separator (4) is provided between the radial sliding bearing (9) and the bearing housing (1).

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