Magnetic transmission device
The magnetic transmission device rotates simultaneously through the magnet drive connector and the transmission, solving the problem of damage to the elastic coupling due to the decrease in fatigue strength in large equipment, and achieving safety guarantees for equipment and personnel.
Patent Information
- Application Number
- CN202421938120.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-09
AI Technical Summary
Existing elastic couplings are prone to damage in large equipment due to the decrease in fatigue strength, resulting in the inability to guarantee equipment safety and personnel safety.
The magnetic transmission device is adopted to rotate synchronously through the magnetic driving connection and the transmission member between the magnets to avoid solid connections and adapt to the large axial displacement changes between the driving shaft and the driven shaft. The weight of the transmission is supported by the base to reduce the impact on the shaft.
Improve the motion performance and stability of the driving shaft and the driven shaft, reduce the risk of device damage, and ensure the safety of equipment and personnel.
Smart Images
Figure CN223066985U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of industrial transmission, in particular to a magnetic transmission device used for large equipment. Background Art
[0002] In mechanical equipment, transmission devices are often required to connect the driving shaft and the driven shaft in different mechanisms so that they rotate together to transmit torque. At present, elastic couplings are usually used to achieve the above functions. Elastic couplings have flexible components and use them to compensate for the impact and vibration problems caused by the offset of the two shafts. When elastic couplings are used for the transmission of large equipment, the gravity of the elastic coupling acts on the two shafts, and the fatigue strength of the flexible components decreases due to alternating stress. When the flexible components are damaged, the elastic coupling will come out in an unpredictable way, and the safety of equipment and personnel cannot be guaranteed. Utility Model Content
[0003] The utility model aims to provide a magnetic transmission device, which can be stably applied to the transmission of large equipment, is not easy to be damaged, and ensures the safety of equipment and personnel.
[0004] The utility model provides a magnetic transmission device, comprising a base, a transmission member, a first connecting member and a second connecting member. The base can be placed or fixed on a working surface. The transmission member comprises a transmission shaft, a first transmission part and a second transmission part. The transmission shaft is rotatably arranged in the base around its axis. The first transmission part is connected to one end of the transmission shaft in the axial direction, and the first transmission part is provided with a plurality of first magnets arranged around the axis of the transmission shaft. The second transmission part is connected to the other end of the transmission shaft in the axial direction, and the second transmission part is provided with a plurality of second magnets arranged around the axis of the transmission shaft. The first connecting member can be fixed to the driving shaft or the driven shaft of the device, and the first connecting member is provided with a plurality of third magnets arranged around a first axis. When the first connecting member is spaced apart from the first transmission part, when one of the first transmission part and the first connecting member rotates, the magnetic force between the plurality of first magnets and the plurality of third magnets can drive the other of the first transmission part and the first connecting member to rotate synchronously. The second connecting member can be fixed to the driving shaft or the driven shaft of the equipment. The second connecting member is provided with a plurality of fourth magnets arranged around a second axis. When the second connecting member is spaced apart from the second transmission part, when one of the second transmission part and the second connecting member rotates, the magnetic force between the plurality of second magnets and the plurality of fourth magnets can drive the other of the second transmission part and the second connecting member to rotate synchronously.
[0005] The magnetic drive device provided by the present utility model has a transmission shaft of a transmission member rotatably passing through a base. A first connecting member and a second connecting member are respectively connected to a driving shaft and a driven shaft. The synchronous rotation of the first connecting member, the transmission member, and the second connecting member is achieved through a first magnet on the first transmission portion and a third magnet on the first connecting member, as well as a second magnet on the second transmission portion and a fourth magnet on the second connecting member. Since there is no physical connection between the first connecting member, the transmission member, and the second connecting member, it can cope with large axial displacement changes between the driving shaft and the driven shaft and is not easily damaged. The weight of the transmission member is supported by the base and does not act on the driving shaft and the driven shaft, improving the motion performance and stability of the driving shaft and the driven shaft. Moreover, the base can limit the transmission member from disengaging, ensuring the safety of the equipment and personnel.
[0006] In another schematic embodiment of the magnetic drive device, the N poles and S poles of each first magnet and each third magnet are arranged along the radial direction of the transmission shaft, and the arrangement directions of the N poles and S poles of two adjacent first magnets are opposite, and the arrangement directions of the N poles and S poles of two adjacent third magnets are opposite. Each first magnet is radially opposite to a third magnet along the transmission shaft.
[0007] In yet another schematic embodiment of the magnetic drive device, the N poles and S poles of each first magnet and each third magnet are arranged along a direction parallel to the axis of the transmission shaft, and the arrangement directions of the N poles and S poles of two adjacent first magnets are opposite, and the arrangement directions of the N poles and S poles of two adjacent third magnets are opposite. Each first magnet is opposite to a third magnet along a direction parallel to the axis of the transmission shaft.
[0008] In another schematic embodiment of the magnetic drive device, the N poles and S poles of each second magnet and each fourth magnet are arranged along the radial direction of the transmission shaft, and the arrangement directions of the N poles and S poles of two adjacent second magnets are opposite, and the arrangement directions of the N poles and S poles of two adjacent fourth magnets are opposite. Each second magnet is radially opposite to a fourth magnet along the transmission shaft.
[0009] In another schematic embodiment of the magnetic drive device, the N poles and S poles of each second magnet and each fourth magnet are arranged along a direction parallel to the axis of the transmission shaft, and the arrangement directions of the N poles and S poles of two adjacent second magnets are opposite, and the arrangement directions of the N poles and S poles of two adjacent fourth magnets are opposite. Each second magnet is opposite to a fourth magnet along a direction parallel to the axis of the transmission shaft.
[0010] In another schematic embodiment of the magnetic drive device, the magnetic drive device further includes a bearing. The bearing is arranged on the base, and the transmission shaft passes through the bearing.
[0011] In another schematic embodiment of the magnetic drive device, the magnetic drive device includes two bases and two bearings, and both ends of the transmission shaft in the axial direction are passed through the two bearings.
[0012] In another schematic embodiment of the magnetic drive device, the bearing is a ball bearing or a sliding bearing.
[0013] In another schematic embodiment of the magnetic drive device, the first magnet, the second magnet, the third magnet, and the fourth magnet are all permanent magnets.
[0014] In another schematic embodiment of the magnetic drive device, the first magnet, the second magnet, the third magnet, and the fourth magnet are all neodymium iron boron magnets.
[0015] In another schematic embodiment of the magnetic drive device, the first connecting member can be fixed to the driving shaft or the driven shaft of a motor, a steam turbine, a gas turbine, and an expander, and the second connecting member can be fixed to the driving shaft or the driven shaft of a motor, a steam turbine, a gas turbine, and an expander. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The following drawings only schematically illustrate and explain the present utility model, and do not limit the scope value of the present utility model.
[0017] Figure 1 It is a schematic cross-sectional structure diagram of a schematic embodiment of the magnetic drive device.
[0018] Figure 2 It is another schematic cross-sectional structure diagram of the magnetic drive device.
[0019] Figure 3 It is a schematic cross-sectional structure diagram of another schematic embodiment of the magnetic drive device.
[0020] Figure 4 It is a schematic structure diagram of the first transmission part.
[0021] LABEL DESCRIPTION
[0022] 10 Base
[0023] 20 Transmission member
[0024] 22 Transmission shaft
[0025] 24 First transmission part
[0026] 25 First magnet
[0027] 26 Second transmission part
[0028] 27 Second magnet
[0029] 30 First connecting member
[0030] 32 Third magnet
[0031] 40 Second connecting member
[0032] 42 Fourth magnet
[0033] 50 Bearing
[0034] R1 First axis
[0035] R2 Second axis Detailed implementation manners
[0036] For a clearer understanding of the technical features, objectives, and effects of the utility model, the detailed implementation manners of the utility model are now described with reference to the accompanying drawings. In the drawings, the same reference numerals denote components having the same or similar structures but the same functions.
[0037] In this document, "schematic" means "serving as an example, instance, or illustration", and any illustration or implementation manner described as "schematic" in this document should not be construed as a more preferred or more advantageous technical solution.
[0038] In this document, "first", "second", etc. do not indicate their importance or order, etc., but are only used to indicate the differences from each other for the convenience of document description.
[0039] For the sake of simplicity of the drawings, only the parts related to the utility model are schematically shown in each drawing, and they do not represent the actual structure of the product.
[0040] Figure 1 It is a flowchart of a schematic implementation manner of a magnetic drive device. Refer to Figure 1 , the magnetic drive device includes two bases 10, a transmission member 20, a first connecting member 30, and a second connecting member 40. The base 10 can be placed or fixed on the working surface.
[0041] The transmission member 20 includes a transmission shaft 22, a first transmission portion 24, and a second transmission portion 26. The transmission shaft 22 is rotatably disposed through the base 10 about its axis. The first transmission portion 24 is connected to one axial end of the transmission shaft 22, and the second transmission portion 26 is connected to the other axial end of the transmission shaft 22.
[0042] Figure 2 It is another cross-sectional structural schematic diagram of the magnetic drive device. In Figure 2 , the axis of the transmission shaft 22 is perpendicular to the page direction. Refer to Figure 1 and Figure 2 , six first magnets 25 arranged around the axis of the transmission shaft 22 are provided on the first transmission portion 24 ( Figure 2(only one of them is marked). Six second magnets 27 arranged around the axis of the transmission shaft 22 are provided on the second transmission part 26. The arrangement of the second magnets 27 is similar to that of the first magnets 25, and reference can be made to Figure 2 .
[0043] The first connecting piece 30 can be fixed to the driving shaft or the driven shaft of a large motor, steam turbine, gas turbine and expander. Refer to Figure 1 and Figure 2 , six third magnets 32 arranged around a first axis R1 are provided on the first connecting piece 30 ( Figure 2 only one of them is marked). When the first connecting piece 30 is arranged at an interval from the first transmission part 24, the third magnets 32 and the first magnets 25 are opposite to each other in pairs and the arrangement directions of the N poles and the S poles are opposite, thereby generating magnetic force and attracting each other. The third magnets 32 and the first magnets 25 on both sides of the opposite first magnets 25 generate magnetic force and repel each other. When one of the first transmission part 24 and the first connecting piece 30 rotates, the magnetic force between the six first magnets 25 and the six third magnets 32 can drive the other one of the first transmission part 24 and the first connecting piece 30 to rotate synchronously.
[0044] The second connecting piece 40 can be fixed to the driving shaft or the driven shaft of a large motor, steam turbine, gas turbine and expander. In application, if the first connecting piece 30 is fixed to the driving shaft, the second connecting piece 40 is fixed to the driven shaft. If the first connecting piece 30 is fixed to the driven shaft, the second connecting piece 40 is fixed to the driving shaft, thereby realizing torque transmission. Six fourth magnets 42 arranged around a second axis R2 are provided on the second connecting piece 40. The arrangement of the fourth magnets 42 is similar to that of the third magnets 32, and reference can be made to Figure 2 . When the second connecting piece 40 is arranged at an interval from the second transmission part 26, the fourth magnets 42 and the second magnets 27 are opposite to each other in pairs and generate magnetic force. When one of the second transmission part 26 and the second connecting piece 40 rotates, the magnetic force between the six second magnets 27 and the six fourth magnets 42 can drive the other one of the second transmission part 26 and the second connecting piece 40 to rotate synchronously.
[0045] Although in the illustrative embodiment, the first magnets 25, the second magnets 27, the third magnets 32 and the fourth magnets 42 are six respectively, this is not limiting. In other illustrative embodiments, the number of the first magnets 25, the second magnets 27, the third magnets 32 and the fourth magnets 42 can be adjusted according to actual situations.
[0046] The magnetic drive device provided by the present utility model has a transmission shaft 22 of a transmission member 20 rotatably passing through a base 10. A first connecting member 30 and a second connecting member 40 are respectively connected to a driving shaft and a driven shaft. The synchronous rotation of the first connecting member 30, the transmission member 20, and the second connecting member 40 is achieved through a first magnet 25 on a first transmission portion 24 and a third magnet on the first connecting member 30, as well as a second magnet 27 on a second transmission portion 26 and a fourth magnet 42 on the second connecting member 40. Since there is no physical connection between the first connecting member 30, the transmission member 20, and the second connecting member 40, it can cope with large axial displacement changes between the driving shaft and the driven shaft and is not easily damaged. The weight of the transmission member 20 is supported by the base 10 and does not act on the driving shaft and the driven shaft, improving the motion performance and stability of the driving shaft and the driven shaft. Moreover, the base 10 can prevent the transmission member 20 from coming out, ensuring the safety of the equipment and personnel.
[0047] In a schematic embodiment, the first magnet 25, the second magnet 27, the third magnet 32, and the fourth magnet 42 are all permanent magnets, specifically neodymium iron boron magnets. Neodymium iron boron magnets have excellent magnetic properties, and the magnetic field pulling force can reach 20 MPa. Therefore, this magnetic drive device does not require additional energy consumption during use.
[0048] In a schematic embodiment, referring to Figure 1 , the magnetic drive device includes two bearings 50, and each bearing 50 is disposed on a base 10. Axial ends of the transmission shaft 22 pass through the two bearings 50. The two bases 10 can improve the stability of the support for the transmission shaft 22, and the bearings 50 make the rotation of the transmission shaft 22 smoother. The bearings 50 are ball bearings, and ball bearings do not require additional lubrication work and are easy to maintain. However, this is not limited thereto. In other schematic embodiments, the bearings 50 can also be sliding bearings with a corresponding lubrication system to ensure better stability and lubricity.
[0049] Although in the schematic embodiment, the magnetic drive device includes two corresponding bases 10 and two bearings 50, this is not limited thereto. In other schematic embodiments, the number of the bases 10 and the bearings 50 can be adjusted according to actual situations. Of course, it can also include only one base 10, and the magnetic drive device can also not include bearings 50.
[0050] In a schematic embodiment, referring to Figure 1 and Figure 2 , the N poles and S poles of each first magnet 25 and each third magnet 32 are arranged along the radial direction of the transmission shaft 22, and the arrangement directions of the N poles and S poles of two adjacent first magnets 25 are opposite, and the arrangement directions of the N poles and S poles of two adjacent third magnets 32 are opposite. Each first magnet 25 is radially opposite to a third magnet 32 along the transmission shaft 22.
[0051] In a schematic embodiment, the N and S poles of each second magnet 27 and each fourth magnet 42 are arranged radially along the transmission shaft 22, and the arrangement directions of the N and S poles of two adjacent second magnets 27 are opposite to each other, and the arrangement directions of the N and S poles of two adjacent fourth magnets 42 are opposite to each other. Each second magnet 27 is radially opposite to a fourth magnet 42 along the transmission shaft 22. The arrangement of the second magnet 27 is similar to that of the first magnet 25, and reference can be made to Figure 2 .
[0052] Figure 3 FIG. is a schematic cross-sectional structure diagram of another schematic embodiment of the magnetic drive device. Figure 4 FIG. is a schematic structural diagram of the first transmission part. In Figure 4 , the axis of the transmission shaft 22 is perpendicular to the page direction, and reference can be made to Figure 3 and Figure 4 . The same or similar parts of it and the magnetic drive device in Figure 1 and Figure 2 will not be described in detail. The difference is that the N and S poles of each first magnet 25 and each third magnet 32 are arranged along the direction parallel to the axis of the transmission shaft 22, and the arrangement directions of the N and S poles of two adjacent first magnets 25 are opposite to each other, and the arrangement directions of the N and S poles of two adjacent third magnets 32 are opposite to each other. Each first magnet 25 is opposite to a third magnet 32 along the direction parallel to the axis of the transmission shaft 22. The arrangement of the third magnet 32 is similar to that of the first magnet 25, and reference can be made to Figure 4 .
[0053] In a schematic embodiment, the N and S poles of each second magnet 27 and each fourth magnet 42 are arranged radially along the transmission shaft 22, and the arrangement directions of the N and S poles of two adjacent second magnets 27 are opposite to each other, and the arrangement directions of the N and S poles of two adjacent fourth magnets 42 are opposite to each other. Each second magnet 27 is radially opposite to a fourth magnet 42 along the transmission shaft 22. The arrangement of the second magnet 27 and the fourth magnet 42 is similar to that of the first magnet 25, and reference can be made to Figure 4 .
[0054] It should be understood that although this specification is described according to each embodiment, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0055] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present utility model, and they are not intended to limit the scope of protection of the present utility model. Any equivalent implementation or change made without departing from the technical spirit of the present utility model, such as the combination, division, or repetition of features, shall be included within the scope of protection of the present utility model.
Claims
1. Magnetic drive device, characterized in that, including a base (10) which can be placed or fixed on a working surface; a transmission member (20), the transmission member (20) includes: a transmission shaft (22) which is rotatably disposed through the base (10) about its axis, a first transmission part (24) which connects one axial end of the transmission shaft (22), and a plurality of first magnets (25) arranged around the axis of the transmission shaft (22) are provided on the first transmission part (24), and a second transmission part (26) which connects the other axial end of the transmission shaft (22), and a plurality of second magnets (27) arranged around the axis of the transmission shaft (22) are provided on the second transmission part (26); a first connecting member (30) which can be fixed to the driving shaft or the driven shaft of the device, and a plurality of third magnets (32) arranged around a first axis (R1) are provided on the first connecting member (30). When the first connecting member (30) is spaced apart from the first transmission part (24), when one of the first transmission part (24) and the first connecting member (30) rotates, the magnetic force between the plurality of first magnets (25) and the plurality of third magnets (32) can drive the other one of the first transmission part (24) and the first connecting member (30) to rotate synchronously; and a second connecting member (40) which can be fixed to the driving shaft or the driven shaft of the device, and a plurality of fourth magnets (42) arranged around a second axis (R2) are provided on the second connecting member (40). When the second connecting member (40) is spaced apart from the second transmission part (26), when one of the second transmission part (26) and the second connecting member (40) rotates, the magnetic force between the plurality of second magnets (27) and the plurality of fourth magnets (42) can drive the other one of the second transmission part (26) and the second connecting member (40) to rotate synchronously.
2. The magnetic drive device according to claim 1, characterized in that, The N poles and S poles of each of the first magnets (25) and each of the third magnets (32) are arranged along the radial direction of the transmission shaft (22), and the arrangement directions of the N poles and S poles of two adjacent first magnets (25) are opposite, the arrangement directions of the N poles and S poles of two adjacent third magnets (32) are opposite, and each of the first magnets (25) is opposite to one of the third magnets (32) along the radial direction of the transmission shaft (22).
3. The magnetic drive device according to claim 1, characterized in that, The N poles and S poles of each of the first magnets (25) and each of the third magnets (32) are arranged along a direction parallel to the axis of the transmission shaft (22), and the arrangement directions of the N poles and S poles of two adjacent first magnets (25) are opposite, the arrangement directions of the N poles and S poles of two adjacent third magnets (32) are opposite, and each of the first magnets (25) is opposite to one of the third magnets (32) along a direction parallel to the axis of the transmission shaft (22).
4. The magnetic drive device according to claim 1, characterized in that, The N and S poles of each of the second magnets (27) and each of the fourth magnets (42) are arranged radially along the transmission shaft (22), and the N and S poles of two adjacent second magnets (27) are arranged in opposite directions, the N and S poles of two adjacent fourth magnets (42) are arranged in opposite directions, and each second magnet (27) is radially opposite to a fourth magnet (42) along the transmission shaft (22).
5. The magnetic drive device according to claim 1, wherein The N and S poles of each of the second magnets (27) and each of the fourth magnets (42) are arranged in a direction parallel to the axis of the transmission shaft (22), and the N and S poles of two adjacent second magnets (27) are arranged in opposite directions, the N and S poles of two adjacent fourth magnets (42) are arranged in opposite directions, and each second magnet (27) is opposite to a fourth magnet (42) in a direction parallel to the axis of the transmission shaft (22).
6. The magnetic drive device according to claim 1, characterized in that, The magnetic drive device further includes a bearing (50), the bearing (50) is arranged on the base (10), and the transmission shaft (22) passes through the bearing (50).
7. The magnetic drive device according to claim 6, wherein, The magnetic drive device includes two bases (10) and two bearings (50), and both axial ends of the transmission shaft (22) pass through the two bearings (50).
8. The magnetic drive device according to claim 6, wherein The bearing (50) is a ball bearing or a sliding bearing.
9. The magnetic drive device according to claim 1, characterized in that, The first magnet (25), the second magnet (27), the third magnet (32) and the fourth magnet (42) are all permanent magnets.
10. The magnetic drive device according to claim 9, characterized in that, The first magnet (25), the second magnet (27), the third magnet (32) and the fourth magnet (42) are all neodymium iron boron magnets.
11. The magnetic drive device according to claim 1, wherein, The first connector (30) can be fixed to the driving shaft or the driven shaft of a motor, a steam turbine, a gas turbine and an expander, and the second connector (40) can be fixed to the driving shaft or the driven shaft of a motor, a steam turbine, a gas turbine and an expander.