Electromagnetic coupling device

Abstract

The utility model relates to the technical field of electromagnetic coupling devices, in particular to an electromagnetic coupling device, which comprises a first shell, a second shell, a first bearing and a second bearing, the isolation cover is provided with a containing cavity, one end of the isolation cover is open, and the open end of the isolation cover is fixed to the inner wall, where the first bearing is located, of the first shell; a third bearing and a fourth bearing are symmetrically arranged on the inner side and the outer side of the bottom of the isolation cover; the inner rotor is rotationally arranged between the first bearing and the third bearing; the outer rotor is located in the first shell and arranged outside the isolation cover in a sleeving mode. According to the embodiment, the first shell and the isolation cover are arranged, so that the inner rotor and the outer rotor are located in different closed spaces, and the purpose that the inner rotor and the outer rotor operate in different working environments is achieved. Meanwhile, the rotating central axes of the inner rotor and the outer rotor coincide through a third bearing and a fourth bearing, and it is guaranteed that the magnetic field is evenly distributed; extra support is provided for the inner rotor and the outer rotor, and eccentricity and shaking in the rotating process are avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas waste heat utilization devices, and in particular to an electromagnetic coupling device. Background Technology

[0002] Electromagnetic couplers, as electric drive devices that transmit torque through electromagnetic induction, offer fast response and high efficiency, and are widely used in many fields such as wind power generation, industrial automated production lines, and electric vehicle drive systems. For example, in wind power generation, electromagnetic couplers can quickly adjust transmission efficiency according to changes in wind speed, achieving efficient energy conversion; in industrial automated production lines, they can be used to precisely control the speed matching between different pieces of equipment, ensuring stable operation of the production process; and in electric vehicle drive systems, they help optimize power transmission between the motor and wheels, improving vehicle performance.

[0003] However, both the inner and outer rotors of an electromagnetic coupler rotate during operation, making it crucial to ensure their centerline alignment. Furthermore, the inner and outer rotors have significantly different structures and shaft connection devices, often requiring them to operate in different environments. Existing electromagnetic couplers suffer from inaccurate alignment of the inner and outer rotors and fail to adequately isolate them from their respective operating environments. Utility Model Content

[0004] To address at least one of the aforementioned technical problems, this invention proposes an electromagnetic coupling device to solve the problems in the prior art where the inner and outer rotors need to operate in different environments and where the alignment of the inner and outer rotors is inaccurate.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An electromagnetic coupling device, comprising:

[0007] A first housing, on both sides of which a first bearing and a second bearing are symmetrically embedded, and the central axes of the first bearing and the second bearing coincide;

[0008] An isolation cover has a receiving cavity and an opening at one end. The opening end of the isolation cover is fixed to the inner wall of the first housing where the first bearing is located, and the isolation cover coincides with the central axis of the first bearing.

[0009] The bottom inner and outer sides of the isolation cover are symmetrically provided with a third bearing and a fourth bearing, and the central axis of the third bearing and the fourth bearing coincides with the central axis of the first bearing and / or the second bearing.

[0010] An inner rotor is located inside the isolation cover. The inner rotor is rotatably disposed between the first bearing and the third bearing, and the rotation center axis of the inner rotor coincides with the center axis of the first bearing and / or the third bearing.

[0011] An outer rotor is located inside the first housing and sleeved outside the isolation cover. The outer rotor is rotatably disposed between the second bearing and the fourth bearing, and the rotation center axis of the outer rotor coincides with the center axis of the second bearing and / or the fourth bearing.

[0012] Preferably, the isolation cover includes a hollow cylindrical cover body and a cover edge extending circumferentially along the open end of the cover body;

[0013] The contact surface between the cover edge and the inner wall of the first housing is a horizontal plane, and the inner and outer sides of the connection between the cover edge and the cover body, as well as the inner and outer sides of the bottom edge of the cover body, are all rounded.

[0014] Preferably, the outer and inner layers of the isolation cover are made of carbon fiber, and the middle layer of the isolation cover is made of epoxy resin.

[0015] Preferably, one end of the first mechanical shaft of the inner rotor is rotatably connected to the first bearing; the other end is rotatably connected to the third bearing and extends out of the first housing; the central axis of the first mechanical shaft coincides with the central axis of the first bearing and / or the third bearing.

[0016] Preferably, the outer rotor includes an outer rotor housing with one end open, a second mechanical shaft connected to the center of the bottom outer side of the outer rotor housing, a positioning part disposed inside the outer rotor housing and coinciding with the central axis of the second mechanical shaft, and an armature winding disposed circumferentially along the inner wall of the outer rotor housing, the armature winding being located on a circle concentric with the second mechanical shaft.

[0017] Preferably, one end of the second mechanical shaft is fixedly connected to the outer center of the outer rotor, and the other end is rotatably connected to the second bearing and extends out of the first housing. The positioning part is rotatably connected to the fourth bearing, and the central axis of the second mechanical shaft of the positioning part coincides with the central axis of the second bearing and / or the fourth bearing.

[0018] Preferably, the inner rotor is made of permanent magnet material.

[0019] Preferably, the first bearing and the second bearing are sliding bearings, and the third bearing and the fourth bearing are rolling bearings.

[0020] Preferably, the first housing is made of stainless steel.

[0021] Preferably, a sealing ring is provided between the isolation cover and the first housing, and it is fixed by bolts and nuts.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. This utility model, by setting up a first housing and an isolation cover, positions the inner rotor within the enclosed space formed by the isolation cover and the inner wall of the first housing, and the outer rotor within the enclosed space formed by the first housing and the outer wall of the isolation cover, thus achieving the purpose of the inner and outer rotors operating in different working environments. Simultaneously, the third and fourth bearings ensure that the rotational axes of the inner and outer rotors coincide, guaranteeing a uniform magnetic field distribution. Furthermore, additional support is provided for the inner and outer rotors, preventing eccentricity and wobbling during rotation, thus avoiding rotor rubbing and effectively improving the operating accuracy of the electromagnetic coupling device.

[0024] 2. This utility model utilizes a combination of sliding bearings and rolling bearings. During the installation phase, the self-aligning characteristic of the sliding bearings allows for coarse positioning, while the high-precision positioning capability of the rolling bearings enables precise positioning. The combination of the two compensates for installation errors. During operation, the sliding bearings bear radial forces, handle radial deviations, and buffer and dampen vibrations, while the rolling bearings bear axial forces, limit axial displacement, and adapt to dimensional changes. The collaboration between the two can handle forces in different directions and dynamically adjust alignment deviations. The mutual constraints between the sliding and rolling bearings ensure long-term stability of alignment accuracy and provide redundancy to guarantee the reliability of the alignment function, effectively improving the overall performance and operational stability of the electromagnetic coupling device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an electromagnetic coupling device.

[0026] Figure 2 This is a schematic diagram of the structure of the isolation cover in this utility model;

[0027] Figure 3 This is a schematic diagram of the installation of the first housing and the isolation cover in this utility model;

[0028] In the figure: 1. First housing; 2. Outer rotor housing; 3. Second mechanical shaft; 4. Isolation cover; 41. Cover body; 42. Cover edge; 5. Inner rotor; 6. First mechanical shaft; 7. Third bearing; 8. Fourth bearing; 9. Second bearing; 10. First bearing; 11. Armature winding; 12. Positioning part. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions in this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments in this utility model, and not all of the embodiments in this utility model.

[0030] Please refer to Figure 1-3 As shown, an electromagnetic coupling device includes:

[0031] A first housing 1, with a first bearing 10 and a second bearing 9 symmetrically embedded on both sides of the first housing 1, the central axes of the first bearing 10 and the second bearing 9 coinciding;

[0032] The isolation cover 4 has a receiving cavity and an opening at one end. The opening end of the isolation cover 4 is fixed to the inner wall of the first housing 1 where the first bearing 10 is located. The isolation cover 4 coincides with the central axis of the first bearing 10.

[0033] The bottom inner and outer sides of the isolation cover 4 are symmetrically provided with a third bearing 7 and a fourth bearing 8, and the central axis of the third bearing 7 and the fourth bearing 8 coincides with the central axis of the first bearing 10 and / or the second bearing 9.

[0034] The inner rotor 5 is located inside the isolation cover 4. The inner rotor 5 is rotatably disposed between the first bearing 10 and the third bearing 7, and the rotation center axis of the inner rotor 5 coincides with the center axis of the first bearing 10 and / or the third bearing 7.

[0035] The outer rotor is located inside the first housing 1 and sleeved outside the isolation cover 4. The outer rotor is rotatably disposed between the second bearing 9 and the fourth bearing 8, and the rotation center axis of the outer rotor coincides with the center axis of the second bearing 9 and / or the fourth bearing 8.

[0036] This embodiment, by setting up a first housing 1 and an isolation cover 4, places the inner rotor 5 within the enclosed space formed by the isolation cover 4 and the inner wall of the first housing 1, and the outer rotor within the enclosed space formed by the first housing 1 and the outer wall of the isolation cover 4, thus achieving the purpose of the inner rotor 5 and the outer rotor operating in different working environments. Simultaneously, the third bearing 7 and the fourth bearing 8 ensure that the rotation center axes of the inner rotor 5 and the outer rotor coincide, guaranteeing a uniform magnetic field distribution. Furthermore, additional support is provided for the inner rotor 5 and the outer rotor to prevent eccentricity and wobbling during rotation, thus avoiding rotor rubbing and effectively improving the operating accuracy of the electromagnetic coupling device.

[0037] It should be noted that the different working environments mentioned above can be understood as the inner rotor 5 and the outer rotor operating under different pressure environments or different gas environments, etc.

[0038] In this embodiment, the material of the first housing 1 can be selected according to its actual use environment. For example, in application scenarios that require good heat dissipation and lightweight, the first housing 1 can be made of aluminum alloy; in chemically polluted or humid environments, the first housing 1 is preferably made of stainless steel.

[0039] Please refer to Figure 2 As shown, in this embodiment, the isolation cover 4 includes a hollow cylindrical cover 41 and a cover edge 42 extending circumferentially along the open end of the cover 41.

[0040] The contact surface between the cover edge 42 and the inner wall of the first housing 1 is a horizontal plane. The inner and outer sides of the connection between the cover edge 42 and the cover body 41, as well as the inner and outer sides of the bottom edge of the cover body 41, are all rounded.

[0041] It should be noted that the purpose of rounding the corners is to ensure that the isolation cover 4 is subjected to uniform stress during the operation of the device, avoiding stress concentration that could cause abrupt changes in the geometric shape of the isolation cover 4 and thus damage it. At the same time, the horizontal plane of the cover edge 42 facilitates the sealing and fixation of the cover edge 42 with the inner wall of the first housing 1.

[0042] To improve the sealing effect of the isolation cover 4, a sealing ring is provided between the isolation cover 4 and the first housing 1 in this embodiment, and it is fixed by bolts and nuts. It is understood that the sealing ring can be made of materials such as natural rubber, nitrile rubber, fluororubber, and polytetrafluoroethylene.

[0043] In order to improve the mechanical properties of the isolation cover 4, the outer and inner layers of the isolation cover 4 in this embodiment are made of carbon fiber, and the middle layer of the isolation cover 4 is made of epoxy resin.

[0044] Understandably, carbon fiber possesses advantages such as high strength, high modulus, and low density, providing excellent mechanical properties and enhancing the structural strength of the shield 4. Epoxy resin, on the other hand, exhibits good adhesion and chemical corrosion resistance, enabling the three-layer structure of the shield 4 to be tightly bonded while resisting potential chemical corrosion. Thus, the shield 4 possesses sufficient strength while also exhibiting good corrosion resistance and stability.

[0045] It should be noted that in this embodiment, the isolation cover 4 isolates the inner rotor 5 and the outer rotor into two different spaces. This prevents heat transfer between the inner and outer rotors during operation, effectively preventing excessive heat accumulation and rapid temperature rise that could affect their normal operation. Simultaneously, the isolation cover 4 also provides chemical isolation protection for the inner rotor 5. Specifically, when the outer rotor operates in a chemically contaminated environment, the isolation cover 4 effectively prevents chemicals from entering the enclosed space containing the inner rotor 5. For example, in electromagnetic equipment used in electroplating workshops, the isolation cover 4 can block corrosive chemicals such as electroplating solutions, providing a relatively clean and non-corrosive operating environment for the inner rotor 5.

[0046] In this embodiment, one end of the first mechanical shaft 6 of the inner rotor 5 is rotatably connected to the first bearing 10; the other end is rotatably connected to the third bearing 7 and extends out of the first housing 1; the central axis of the first mechanical shaft 6 coincides with the central axis of the first bearing 10 and / or the third bearing 7.

[0047] It should be noted that the inner rotor 5 in this embodiment uses permanent magnet materials, specifically neodymium iron boron (Nd-Fe-B) and aluminum nickel cobalt (Al-Ni-Co) types of permanent magnet materials.

[0048] In this embodiment, the outer rotor includes an outer rotor housing 2 with one end open, a second mechanical shaft 3 connected to the center of the bottom outer side of the outer rotor housing 2, a positioning part 12 disposed inside the outer rotor housing 2 and coinciding with the central axis of the second mechanical shaft 3, and an armature winding 11 disposed circumferentially along the inner wall of the outer rotor housing 2. The armature winding 11 is located on a circle concentric with the second mechanical shaft 3.

[0049] One end of the second mechanical shaft 3 is fixedly connected to the outer center of the outer rotor, and the other end is rotatably connected to the second bearing 9 and extends out of the first housing 1. The positioning part 12 is rotatably connected to the fourth bearing 8. The central axis of the second mechanical shaft 3 of the positioning part 12 coincides with the central axis of the second bearing 9 and / or the fourth bearing 8.

[0050] It is understandable that, based on the coincidence of the central axes of the first bearing 10, the second bearing 9, the third bearing 7, and the fourth bearing 8, the central axes of the first mechanical shaft 6, which is rotatably fixed by the first bearing 10 and the third bearing 7, and the second mechanical shaft 3, which is rotatably fixed by the second bearing 9 and the fourth bearing 8, are also coincident. This solves the problem of centering the inner and outer rotors.

[0051] In this embodiment, the first bearing 10 and the second bearing 9 are sliding bearings, and the third bearing 7 and the fourth bearing 8 are rolling bearings.

[0052] Specifically, the first bearing 10 and the second bearing 9 are sliding bearings. Sliding bearings have a certain self-centering characteristic and can withstand large radial forces, making them suitable for supporting the radial loads generated by the outer rotor and inner rotor 5 inside the device, ensuring accurate support positioning. In this embodiment, the sliding bearings can be split for easy installation. The third bearing 7 and the fourth bearing 8 are rolling bearings, which can provide relatively accurate positioning and adapt to axial forces to a certain extent, ensuring the stability of the inner and outer rotors in the axial direction.

[0053] Therefore, the combined use of sliding bearings and rolling bearings allows the electromagnetic coupling device to achieve both precise positioning during installation. The self-aligning characteristic of the sliding bearings provides coarse positioning, while the high-precision positioning capability of the rolling bearings ensures accurate positioning. This combination compensates for installation errors. During operation, the sliding bearings bear radial forces, handle radial deviations, and provide cushioning and shock absorption, while the rolling bearings bear axial forces, limit axial displacement, and adapt to dimensional changes. Together, they can handle forces in different directions and dynamically adjust alignment deviations. The mutual constraints between the sliding and rolling bearings ensure long-term stability of alignment accuracy and provide redundancy to guarantee the reliability of the alignment function, effectively improving the overall performance and operational stability of the electromagnetic coupling device.

[0054] The armature windings 11 of the outer rotor are evenly distributed on the concentric circumference of the second mechanical shaft 3. This has the advantage of fully utilizing the internal space of the outer rotor, resulting in a more uniform magnetic field distribution and thus improving the efficiency of electromagnetic coupling. When the inner rotor 5 rotates, the magnetic field generated by its permanent magnets can evenly pass through the armature windings 11, allowing each part of the winding to effectively cut magnetic lines of force and generate an induced electromotive force.

[0055] Understandably, to increase the number of turns in the armature winding 11, this embodiment employs layered winding. That is, the armature winding 11 is divided into multiple layers, each separated by insulating material, further optimizing the magnetic field distribution and reducing leakage flux. This also improves the inductance and mutual inductance characteristics of the armature winding 11 to some extent, thereby enhancing the performance of the electromagnetic coupler. This, in turn, increases the amplitude of the induced electromotive force and strengthens the output capability of the electromagnetic torque.

[0056] This invention, by setting up a first housing 1 and an isolation cover 4, places the inner rotor 5 within the enclosed space formed by the isolation cover 4 and the inner wall of the first housing 1, and the outer rotor within the enclosed space formed by the first housing 1 and the outer wall of the isolation cover 4, thus achieving the purpose of the inner rotor 5 and the outer rotor operating in different working environments. Simultaneously, the third bearing 7 and the fourth bearing 8 ensure that the rotation center axes of the inner rotor 5 and the outer rotor coincide, guaranteeing a uniform magnetic field distribution. Furthermore, additional support is provided for the inner rotor 5 and the outer rotor to prevent eccentricity and wobbling during rotation, thus avoiding rotor rubbing and effectively improving the operating accuracy of the electromagnetic coupling device.

[0057] The above description is a specific implementation of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An electromagnetic coupling device, characterized in that, include: A first housing (1) is provided with a first bearing (10) and a second bearing (9) symmetrically embedded on both sides of the first housing (1), and the central axes of the first bearing (10) and the second bearing (9) coincide. An isolation cover (4) has a receiving cavity and an opening at one end. The opening end of the isolation cover (4) is fixed to the inner wall of the first housing (1) where the first bearing (10) is located. The isolation cover (4) coincides with the central axis of the first bearing (10). The bottom inner and outer sides of the isolation cover (4) are symmetrically provided with a third bearing (7) and a fourth bearing (8), and the central axis of the third bearing (7) and the fourth bearing (8) coincides with the central axis of the first bearing (10) and / or the second bearing (9); An inner rotor (5) is located inside the isolation cover (4). The inner rotor (5) is rotatably disposed between the first bearing (10) and the third bearing (7), and the rotation center axis of the inner rotor (5) coincides with the center axis of the first bearing (10) and / or the third bearing (7). An outer rotor is located inside the first housing (1) and sleeved outside the isolation cover (4). The outer rotor is rotatably disposed between the second bearing (9) and the fourth bearing (8), and the rotation center axis of the outer rotor coincides with the center axis of the second bearing (9) and / or the fourth bearing (8).

2. The electromagnetic coupling device according to claim 1, characterized in that, The isolation cover (4) includes a hollow cylindrical cover (41) and a cover edge (42) extending circumferentially along the open end of the cover (41); The contact surface between the cover edge (42) and the inner wall of the first housing (1) is a horizontal plane. The inner and outer sides of the connection between the cover edge (42) and the cover body (41) as well as the inner and outer sides of the bottom edge of the cover body (41) are all rounded.

3. The electromagnetic coupling device according to claim 1, characterized in that, The outer and inner layers of the isolation cover (4) are made of carbon fiber, and the middle layer of the isolation cover (4) is made of epoxy resin.

4. The electromagnetic coupling device according to claim 1, characterized in that, One end of the first mechanical shaft (6) of the inner rotor (5) is rotatably connected to the first bearing (10); the other end is rotatably connected to the third bearing (7) and extends out of the first housing (1); the central axis of the first mechanical shaft (6) coincides with the central axis of the first bearing (10) and / or the third bearing (7).

5. The electromagnetic coupling device according to claim 1, characterized in that, The outer rotor includes an outer rotor housing (2) with one end open, a second mechanical shaft (3) connected to the center of the bottom outer side of the outer rotor housing (2), a positioning part (12) disposed inside the outer rotor housing (2) and coinciding with the central axis of the second mechanical shaft (3), and an armature winding (11) disposed circumferentially along the inner wall of the outer rotor housing (2), the armature winding (11) being located on a circle concentric with the second mechanical shaft (3).

6. The electromagnetic coupling device according to claim 5, characterized in that, One end of the second mechanical shaft (3) is fixedly connected to the outer center of the outer rotor, and the other end is rotatably connected to the second bearing (9) and extends out of the first housing (1). The positioning part (12) is rotatably connected to the fourth bearing (8). The central axis of the positioning part (12) and the second mechanical shaft (3) coincides with the central axis of the second bearing (9) and / or the fourth bearing (8).

7. The electromagnetic coupling device according to any one of claims 1-6, characterized in that, The inner rotor (5) is made of permanent magnet material.

8. The electromagnetic coupling device according to any one of claims 1-6, characterized in that, The first bearing (10) and the second bearing (9) are sliding bearings, and the third bearing (7) and the fourth bearing (8) are rolling bearings.

9. The electromagnetic coupling device according to any one of claims 1-6, characterized in that, The first housing (1) is made of stainless steel.

10. The electromagnetic coupling device according to any one of claims 1-6, characterized in that, A sealing ring is provided between the isolation cover (4) and the first housing (1), and it is fixed by bolts and nuts.

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