Permanent magnet coupling vacuum transmission assembly

Abstract

The invention relates to a permanent magnet coupling vacuum transmission assembly, and relates to the technical field of transmission equipment, the permanent magnet coupling vacuum transmission assembly comprises a shell, an inner rotor shaft and an outer rotor shaft are rotatably arranged at the two ends in the shell respectively, and a plurality of inner rotor permanent magnets are arranged at the end, located in the shell, of the inner rotor shaft; a plurality of outer rotor permanent magnets are arranged at the end, located in the shell, of the outer rotor shaft, the inner rotor permanent magnets and the outer rotor permanent magnets are coupled through magnetic force, a vacuum spacer bush is arranged in the shell, and the inner rotor permanent magnets and the outer rotor permanent magnets are separated in a sealed mode through the vacuum spacer bush. The vacuum transmission assembly has the advantages that the sealing effect of the vacuum transmission assembly is improved, and the vacuum transmission assembly can be applied to environments with different vacuum degree requirements or high-pressure requirements.

Description

Technical Field

[0001] The present application relates to the technical field of transmission equipment, and in particular to a permanent magnet coupled vacuum transmission component. Background Art

[0002] Magnetic coupling is also called magnetic coupling and permanent magnet transmission device. It is mainly composed of three parts: copper rotor, permanent magnet rotor and controller. Generally, the copper rotor is connected to the motor shaft, and the permanent magnet rotor is connected to the shaft of the working machine. There is an air gap (called air gap) between the copper rotor and the permanent magnet rotor, and there is no mechanical connection to transmit torque. In this way, a soft (magnetic) connection is formed between the motor and the working machine, and the change of the torque and speed of the working machine shaft is achieved by adjusting the air gap. Due to the different air gap adjustment methods, permanent magnet eddy current transmission devices are divided into standard type, delayed type, torque limiting type, speed regulation type and other types.

[0003] When the magnetic coupler is used in a vacuum environment, the rotor shaft and the stator shaft need to be sealed. The current more common sealing method is magnetic fluid sealing. The magnetic fluid sealing device is composed of a non-magnetic seat, bearings, magnetic poles, permanent magnets, magnetic shafts, and magnetic fluids. Under the action of a uniform and stable magnetic field, the magnetic fluid fills the set space and establishes a multi-stage "O-ring" to achieve a sealing effect. However, there is relative motion between the magnetic fluid and the rotating parts, which limits the application of magnetic fluid seals in high-speed and high-pressure environments. Summary of the invention

[0004] In order to solve the problem in the prior art that the existing magnetic coupler adopts magnetic fluid seal and cannot be applied to high-speed and high-pressure environments, the present application provides a permanent magnetic coupling vacuum transmission assembly.

[0005] A permanent magnet coupled vacuum transmission component provided in the present application adopts the following technical solution: a permanent magnet coupled vacuum transmission component, comprising a shell, an inner rotor shaft and an outer rotor shaft are rotatably arranged at two ends of the shell, a plurality of inner rotor permanent magnets are arranged at one end of the inner rotor shaft located inside the shell, and a plurality of outer rotor permanent magnets are arranged at one end of the outer rotor shaft located inside the shell, the inner rotor permanent magnet and the outer rotor permanent magnet are coupled by magnetic force, a vacuum sleeve is arranged inside the shell, and the vacuum sleeve seals and separates the inner rotor permanent magnet and the outer rotor permanent magnet.

[0006] By adopting the above technical solution, the inner rotor shaft and the outer rotor shaft are coupled through the magnetic force of the inner rotor permanent magnet and the outer rotor permanent magnet, thereby realizing non-contact transmission. A vacuum spacer is arranged between the inner rotor permanent magnet and the outer rotor permanent magnet to realize isolation between the vacuum and the atmosphere, thereby improving the sealing performance of the vacuum transmission component.

[0007] Optionally, a plurality of the inner rotor permanent magnets are evenly arranged in the circumferential direction on the outer surface of one end of the inner rotor shaft located inside the shell, and an end of the outer rotor shaft located inside the shell is connected to an outer magnetic yoke, and the outer magnetic yoke is sleeved on the outside of the inner rotor permanent magnet, and a plurality of the outer rotor permanent magnets are evenly arranged in the circumferential direction on the inner wall of the outer magnetic yoke.

[0008] By adopting the above technical solution, the inner rotor permanent magnet and the outer rotor permanent magnet are coaxially arranged to achieve non-contact transmission.

[0009] Optionally, the vacuum sleeve is sleeved on the outside of the inner rotor shaft and fixedly connected to the housing, and the outer magnetic yoke is sleeved on the outside of the vacuum sleeve.

[0010] By adopting the above technical scheme, the vacuum spacer is arranged between the inner rotor permanent magnet and the outer rotor permanent magnet, and the inner rotor permanent magnet, the vacuum spacer and the outer rotor permanent magnet are stacked and arranged, thereby improving the sealing between the outer rotor permanent magnet and the inner rotor permanent magnet, realizing the sealing between the inner rotor shaft and the outer rotor shaft, and improving the sealing performance while not affecting the transmission effect between the inner rotor shaft and the outer rotor shaft.

[0011] Optionally, both the inner rotor permanent magnet and the outer rotor permanent magnet are samarium cobalt permanent magnets and are arranged in a Halbach array structure.

[0012] By adopting the above technical solution and using samarium cobalt permanent magnets, the product can be used in high temperature environments. No additional water cooling system is required at 200°C. The samarium cobalt permanent magnet adopts a Halbach array structure to maximize the magnetic properties. Under the same torque, the amount of permanent magnets can be reduced to reduce costs and reduce product size.

[0013] Optionally, an inwardly recessed slot is provided on the inner wall of the outer magnetic yoke, and the outer rotor permanent magnet is embedded in the slot.

[0014] By adopting the above technical solution, the outer rotor permanent magnet is embedded in the slot to prevent the outer rotor permanent magnet from failing due to circumferential displacement.

[0015] Optionally, two clamping blocks are symmetrically arranged on the inner wall of the outer magnetic yoke, the cross-section of the clamping block is trapezoidal, the clamping block is clamped between two adjacent outer rotor permanent magnets, and an adjusting screw threadably connected to the clamping block is rotatably arranged on the side wall of the outer magnetic yoke.

[0016] By adopting the above technical solution, trapezoidal clamping blocks are added between the outer rotor permanent magnets for locking, so as to prevent the outer rotor permanent magnets from being attracted and falling off by the inner rotor permanent magnets. At the same time, adjusting screws are used radially to prevent the outer rotor magnets from following the inner rotor magnets when the inner rotor shaft and the outer rotor shaft rotate relative to each other, resulting in transmission failure. The radial position of the clamping blocks can be adjusted by rotating the adjusting screws. The trapezoidal structure of the clamping blocks is utilized to compress and fix multiple outer rotor permanent magnets, thereby improving the fixing strength of the outer rotor permanent magnets.

[0017] Optionally, the outer magnetic yoke is made of magnetic conductive material, and the outer rotor permanent magnet is adsorbed on the inner wall of the outer magnetic yoke by magnetic force.

[0018] By adopting the above technical solution, the outer rotor permanent magnet is adsorbed on the inner wall of the outer yoke by magnetic force, without the use of glue, and is applied in a vacuum environment to reduce the introduction of organic matter.

[0019] Optionally, at least one bearing is provided between the outer rotor shaft and the housing, and between the inner rotor shaft and the vacuum sleeve.

[0020] By adopting the above technical solution and arranging bearings, the transmission efficiency of the vacuum transmission assembly is improved.

[0021] Optionally, a protective sleeve is provided on the outer fixed sleeve of the inner rotor permanent magnet.

[0022] By adopting the above technical solution, a stainless steel protective sleeve is placed on the outer diameter of the inner rotor permanent magnet to prevent the inner rotor permanent magnet from being sucked off the shaft due to the mutual attraction between the inner rotor shaft and the outer rotor shaft, which would make the product unusable.

[0023] Optionally, at least one sealing ring is provided at the connection between the vacuum sleeve and the shell.

[0024] By adopting the above technical solution, a sealing ring is provided to improve the sealing performance between the vacuum spacer and the shell, thereby improving the overall sealing performance of the vacuum transmission assembly.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the present application, the inner rotor shaft and the outer rotor shaft are driven by magnetic coupling between the inner rotor permanent magnet and the outer rotor permanent magnet, thereby realizing non-contact transmission and improving the transmission efficiency of the transmission assembly; 2. In the present application, the outer rotor permanent magnet is arranged on the outer yoke, the outer yoke is sleeved on the outer side of the inner rotor permanent magnet, and the outer yoke and the inner rotor permanent magnet are arranged coaxially, which increases the magnetic coupling area between the outer rotor permanent magnet and the inner rotor permanent magnet, and improves the transmission efficiency of the transmission assembly; 3. In the present application, a vacuum sleeve is arranged between the outer rotor permanent magnet and the inner rotor permanent magnet. The vacuum sleeve seals and separates the inner rotor shaft from the outer rotor shaft, thereby improving the sealing effect of the vacuum transmission assembly, so that the vacuum transmission assembly can be used in environments with different vacuum requirements or high pressure requirements without leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a permanent magnet coupled vacuum transmission assembly in an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the internal structure of a permanent magnet coupled vacuum transmission component in an embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the overall structure of the outer rotor of a permanent magnet coupled vacuum transmission assembly in an embodiment of the present application.

[0029] Figure 4 It is a schematic diagram of the internal structure of the outer rotor of a permanent magnet coupled vacuum transmission assembly in an embodiment of the present application.

[0030] Explanation of the reference numerals: 1. Shell; 2. Inner rotor shaft; 3. Outer rotor shaft; 4. Vacuum spacer; 5. Retaining spring; 6. Bearing; 7. Sealing ring; 8. Inner rotor permanent magnet; 9. Protective sleeve; 10. Bearing spacer; 11. Outer yoke; 12. Adjusting screw; 13. Outer rotor permanent magnet; 14. Block; 15. Slot; 16. Connecting screw. DETAILED DESCRIPTION

[0031] The following is an explanation of the implementation of the present application by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification.

[0032] See also Figure 1-4 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of this application, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical content disclosed in this application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this application. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this application without substantially changing the technical content.

[0033] The following is combined with Figure 1-4This application is described in further detail.

[0034] This embodiment discloses a permanent magnet coupling vacuum transmission assembly.

[0035] Reference Figure 1 A permanent magnet coupling vacuum transmission component includes a shell 1, which is cylindrical and hollow inside. A flange for fixing a connecting device is arranged at one end of the shell 1. An inner rotor shaft 2 and an outer rotor shaft 3 are arranged at both ends of the shell 1. The inner rotor shaft 2 and the outer rotor shaft 3 are both rotatably connected to the shell 1.

[0036] Reference Figure 2 , a plurality of inner rotor permanent magnets 8 are arranged evenly spaced along the circumferential direction on the side wall of one end of the inner rotor shaft 2 located inside the shell 1, and the inner rotor permanent magnets 8 are fixed to the outer surface of the inner rotor shaft 2 by glue, and a stainless steel protective sleeve 9 is sleeved on the outer side of the inner rotor permanent magnet 8, and the protective sleeve 9 is used to prevent the inner rotor permanent magnet from being sucked off the shaft due to the mutual attraction between the inner rotor shaft and the outer rotor shaft, causing the product to be unusable, and a vacuum sleeve 4 is sleeved on the outer side of one end of the inner rotor shaft 2 located inside the shell 1, and the vacuum sleeve 4 is fixedly connected to the shell 1 by bolts, and a certain gap is spaced between the vacuum sleeve 4 and the inner rotor permanent magnet 8, and two bearings 6 are arranged between the inner rotor shaft 2 and the vacuum sleeve 4, and the two bearings 6 are separated from each other by a bearing sleeve 10, and a retaining spring 5 for axially limiting the bearing 6 is arranged on the inner wall of the opening of the vacuum sleeve 4, and an outer rotor permanent magnet 13 matching the inner rotor permanent magnet 8 is arranged at one end of the outer rotor shaft 3 located inside the shell 1.

[0037] Reference Figure 3 and Figure 4The outer rotor shaft 3 is located at one end inside the housing 1 and is fixedly connected to an outer yoke 11 by a connecting screw 16. The outer yoke 11 opens toward one end of the inner rotor shaft 2. The outer yoke 11 is sleeved on the outside of the vacuum sleeve 4 with a certain gap. An inwardly recessed slot 15 is arranged on the inner wall of the outer yoke 11. A plurality of outer rotor permanent magnets 13 are evenly arranged along the circumference and embedded in the slot 15. Both the inner rotor permanent magnet 8 and the outer rotor permanent magnet 13 are made of samarium cobalt permanent magnets and are arranged in a Halbach array structure. The use of samarium cobalt permanent magnets allows the product to be used in high temperature environments. No additional water cooling system is required at 200°C. The samarium cobalt permanent magnet The body adopts the Halbach array structure to maximize the magnetic properties. Under the condition of the same torque, the amount of permanent magnets can be reduced to reduce costs and reduce the product body. The slot 15 axially limits the outer rotor permanent magnet 13 to prevent axial displacement. The outer magnetic yoke 11 is made of magnetic conductive material. The outer rotor permanent magnet 13 is adsorbed on the inner wall of the outer magnetic yoke 11 by magnetic force. Two blocks 14 are symmetrically arranged on the inner wall of the outer magnetic yoke 11. The cross-section of the block 14 is trapezoidal. The block 14 is clamped between two adjacent outer rotor permanent magnets 13. An adjusting screw 12 threadedly connected to the block 14 is rotatably arranged on the side wall of the outer magnetic yoke 11.

[0038] The implementation principle of a permanent magnet coupling vacuum transmission component in this embodiment is as follows: the outer rotor permanent magnet and the inner rotor permanent magnet are both made of samarium cobalt permanent magnets, so that the product can be used in high temperature environments. No additional water cooling system is required at 200°C, which simplifies the product. The samarium cobalt permanent magnet adopts a Halbach array structure to maximize the magnetic properties. Under the same torque, the amount of permanent magnets can be reduced to reduce costs and reduce the product volume. The vacuum isolation adopts a vacuum spacer and a sealing ring for static sealing, so that the product can be used in environments with different vacuum requirements or high pressure requirements without leakage. The outer diameter of the inner rotor permanent magnet is covered with a stainless steel protective sleeve. To prevent the inner rotor permanent magnet from being sucked off the shaft due to the mutual attraction between the inner rotor shaft and the outer rotor shaft, causing the product to be unusable, a trapezoidal clamping block is added between the outer rotor permanent magnets for locking to prevent the outer rotor permanent magnet from being attracted by the inner rotor permanent magnet and falling off. At the same time, an adjusting screw is used radially to prevent the outer rotor magnet from following the inner rotor magnet when the inner rotor shaft and the outer rotor shaft rotate relative to each other, resulting in transmission failure. The radial position of the clamping block can be adjusted by rotating the adjusting screw. The trapezoidal structure of the clamping block is used to compress and fix multiple outer rotor permanent magnets, thereby improving the fixing strength of the outer rotor permanent magnet and improving the stability of the transmission assembly during use.

[0039] In summary, in the present application, the inner rotor shaft and the outer rotor shaft are coupled through the magnetic coupling transmission of the inner rotor permanent magnet and the outer rotor permanent magnet, which realizes non-contact transmission and improves the transmission efficiency of the transmission assembly; in the present application, the outer rotor permanent magnet is arranged on the outer yoke, the outer yoke is sleeved on the outer side of the inner rotor permanent magnet, and the outer yoke and the inner rotor permanent magnet are coaxially arranged, which increases the magnetic coupling area between the outer rotor permanent magnet and the inner rotor permanent magnet, and improves the transmission efficiency of the transmission assembly; in the present application, a vacuum spacer is arranged between the outer rotor permanent magnet and the inner rotor permanent magnet, and the vacuum spacer seals and separates the inner rotor shaft from the outer rotor shaft, thereby improving the sealing effect of the vacuum transmission assembly, so that the vacuum transmission assembly can be used in environments with different vacuum requirements or high pressure requirements without leakage. Therefore, the present application effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0040] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present application shall still be included in the protection scope of the present application.

Claims

1. A permanent magnet coupling vacuum transmission assembly, characterized in that: The invention comprises a shell (1), wherein an inner rotor shaft (2) and an outer rotor shaft (3) are rotatably arranged at two ends of the shell (1), a plurality of inner rotor permanent magnets (8) are arranged at one end of the inner rotor shaft (2) located inside the shell (1), and a plurality of outer rotor permanent magnets (13) are arranged at one end of the outer rotor shaft (3) located inside the shell (1), the inner rotor permanent magnets (8) and the outer rotor permanent magnets (13) are coupled with each other by magnetic force, and a vacuum sleeve (4) is arranged inside the shell (1), and the vacuum sleeve (4) seals and separates the inner rotor permanent magnets (8) and the outer rotor permanent magnets (13).

2. A permanent magnet coupling vacuum transmission assembly according to claim 1, characterized in that: A plurality of the inner rotor permanent magnets (8) are arranged uniformly in the circumferential direction on the outer surface of one end of the inner rotor shaft (2) located inside the housing (1); one end of the outer rotor shaft (3) located inside the housing (1) is connected to an outer magnetic yoke (11); the outer magnetic yoke (11) is sleeved on the outside of the inner rotor permanent magnet (8); and a plurality of the outer rotor permanent magnets (13) are arranged uniformly at intervals in the circumferential direction on the inner wall of the outer magnetic yoke (11).

3. A permanent magnet coupling vacuum transmission assembly according to claim 2, characterized in that: The vacuum spacer (4) is sleeved on the outside of the inner rotor shaft (2) and fixedly connected to the housing (1); the outer magnetic yoke (11) is sleeved on the outside of the vacuum spacer (4).

4. A permanent magnet coupling vacuum transmission assembly according to claim 2, characterized in that: The inner rotor permanent magnet (8) and the outer rotor permanent magnet (13) are both made of samarium cobalt permanent magnets and are arranged in a Halbach array structure.

5. A permanent magnet coupling vacuum transmission assembly according to claim 1, characterized in that: An inwardly recessed slot (15) is provided on the inner wall of the outer magnetic yoke (11), and the outer rotor permanent magnet (13) is embedded in the slot (15).

6. A permanent magnet coupling vacuum transmission assembly according to claim 1, characterized in that: Two clamping blocks (14) are symmetrically arranged on the inner wall of the outer magnetic yoke (11); the clamping blocks (14) have a trapezoidal cross section; the clamping blocks (14) are clamped between two adjacent outer rotor permanent magnets (13); and an adjusting screw (12) threadably connected to the clamping blocks (14) is rotatably arranged on the side wall of the outer magnetic yoke (11).

7. A permanent magnet coupling vacuum transmission assembly according to claim 1, characterized in that: The outer magnetic yoke (11) is made of magnetically conductive material, and the outer rotor permanent magnet (13) is adsorbed on the inner wall of the outer magnetic yoke (11) by magnetic force.

8. The permanent magnet coupling vacuum transmission assembly according to claim 1, characterized in that: At least one bearing (6) is provided between the outer rotor shaft (3) and the housing (1), and between the inner rotor shaft (2) and the vacuum sleeve (4).

9. A permanent magnet coupling vacuum transmission assembly according to claim 1, characterized in that: A protective sleeve (9) is provided on the outer fixed sleeve of the inner rotor permanent magnet (8).

10. The permanent magnet coupling vacuum transmission assembly according to claim 1, characterized in that: At least one sealing ring (7) is provided at the connection between the vacuum sleeve (4) and the housing (1).

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