Radial magnetic flux electromagnetic coupling

Abstract

The utility model relates to a radial magnetic flux electromagnetic coupling, which comprises a driving shaft, a driven shaft, a driving shaft rotor, permanent magnets, an iron core, a pole coil and a connecting line, the driven shaft is characterized in that the driving shaft rotor is fixed on the driving shaft, the permanent magnets are uniformly fixed on the inner surface of the driving shaft rotor along the circumferential direction, and the polarities of the adjacent permanent magnets are opposite; the iron core is fixed on the driven shaft, the pole coils are embedded in the iron core, and the winding directions of the adjacent pole coils are opposite; the permanent magnets are aligned with the iron core in the radial direction to form a radial magnetic flux coupling structure. Compared with traditional rigid and elastic couplings and permanent magnet couplings, the radial magnetic flux electromagnetic coupling is adjustable in torque, self-centering in operation and capable of achieving high-quality transmission of electromagnetic torque.

Description

Technical Field

[0001] This utility model relates to a non-contact transmission device, and more particularly to a radial flux electromagnetic coupling that achieves torque adjustment through electromagnetic coupling, which is suitable for industrial scenarios that require precise torque control or vibration isolation. Background Technology

[0002] Rotating machinery typically uses couplings to connect the driving shaft and the driven shaft, and to transmit the motion and torque of the driving shaft.

[0003] Traditional couplings are generally rigid couplings or flexible couplings, both of which are contact transmissions.

[0004] A magnetic coupling is a contactless transmission device that transmits torque based on magnetic field coupling. It typically uses permanent magnets to establish a magnetic field between the driving shaft and the driven shaft to achieve torque transmission.

[0005] In existing technologies, the magnetic field between the driving and driven shafts of a magnetic coupling is established by a permanent magnet, which cannot be changed in terms of magnetic field strength and electromagnetic torque. Magnetic couplings require a large number of permanent magnets, resulting in high cost. The interaction force between the permanent magnets on the driving and driven shafts is large, making alignment difficult. Magnetic couplings also have a large starting torque. For example, CN110855123A discloses a coupling that adjusts torque via an excitation coil, but its outer magnet is a coil, and its inner magnet is a permanent magnet, resulting in a complex structure and a large air gap. This invention optimizes the magnetic circuit layout by placing the permanent magnet on the driving shaft and the coil on the driven shaft, and employs a radial flux design, significantly reducing the amount of permanent magnets used and improving torque adjustment accuracy. Summary of the Invention

[0006] To address the problems existing in the prior art, this utility model proposes a radial flux electromagnetic coupling with adjustable torque. Through a reasonable combination of the drive shaft rotor, permanent magnet, iron core, magnetic pole coil, fixing frame, connecting wire, etc., high-quality transmission of electromagnetic torque and adjustable electromagnetic torque are achieved.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows: a radial flux electromagnetic coupling, comprising a driving shaft, a driven shaft, a driving shaft rotor, a permanent magnet, an iron core, a magnetic pole coil, a connecting wire, and a driven shaft. The driving shaft rotor is fixed on the driving shaft, and the permanent magnets are uniformly fixed on the inner surface of the driving shaft rotor along the circumference, with adjacent permanent magnets having opposite polarities. The iron core is fixed on the driven shaft, and the magnetic pole coils are embedded in the iron core, with adjacent magnetic pole coils having opposite winding directions. The permanent magnets and the iron core are radially aligned to form a radial flux coupling structure.

[0008] Furthermore, a protective ring is fitted around the outside of the magnetic pole coil.

[0009] Furthermore, the magnetic pole coil is also fixed to the iron core by a fixing bracket.

[0010] Furthermore, the connecting wire is connected to the magnetic pole coil, and the magnetic pole coil is connected to an external DC power supply through the connecting wire.

[0011] Furthermore, the external DC power supply is provided by brushes, a brushless excitation system, or a wireless power transmission device.

[0012] Furthermore, the inner diameter of the permanent magnet and the outer diameter of the iron core are concentric.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention relates to a radial flux electromagnetic coupling, applied to contactless transmission. An external DC power supply provides excitation energy to the magnetic pole coils of the coupling, establishing a magnetic field. This magnetic field couples with the magnetic field established by the permanent magnet of the driving shaft, enabling the transmission of electromagnetic torque from the driving shaft to the driven shaft. Compared to traditional rigid, flexible, and permanent magnet couplings, this radial flux electromagnetic coupling offers adjustable torque, self-aligning operation, and high-quality electromagnetic torque transmission. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the radial electromagnetic coupling structure of this utility model;

[0016] In the diagram: 1 is the drive shaft, 2 is the drive shaft rotor, 3 is the fixed frame, 4 is the permanent magnet, 5 is the iron core, 6 is the retaining ring, 7 is the magnetic pole coil, 8 is the connecting wire, and 9 is the driven shaft. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0018] like Figure 1 As shown, the radial flux electromagnetic coupling of this utility model includes a driving shaft 1, a driven shaft 9, a driving shaft rotor 2, a fixed frame 3, a permanent magnet 4, an iron core 5, a retaining ring 6, a magnetic pole coil 7, a connecting line 8, and a driven shaft 9.

[0019] The drive shaft rotor 2 is fixed on the drive shaft 1, and the permanent magnet 4 is uniformly fixed on the inner surface of the drive shaft rotor 2 along the circumference, with the polarities of adjacent permanent magnets 4 being opposite; the iron core 5 is fixed on the driven shaft 9, and the magnetic pole coil 7 is embedded in the iron core 5, with the winding directions of adjacent magnetic pole coils 7 being opposite; the permanent magnet 4 and the iron core 5 are radially aligned to form a radial magnetic flux coupling structure.

[0020] Preferably, a protective ring 6 is fitted around the outside of the magnetic pole coil 7.

[0021] Preferably, the fixing frame 3 is used to fix the magnetic pole coil 7.

[0022] Preferably, the connecting line 8 is connected to the magnetic pole coil 7, and the magnetic pole line 7 is connected to an external DC power supply through the connecting line 8. The external DC power supply is provided to the magnetic pole coil 7 through the connecting line 8.

[0023] Preferably, the external DC power supply can be provided by brushes, a brushless excitation system, or a wireless power transmission device.

[0024] Preferably, the inner diameter of the permanent magnet 4 and the outer diameter of the iron core 5 are concentric.

[0025] Preferably, the magnetic field direction of the electromagnetic coupling is radial.

[0026] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any improvements made by those skilled in the art within the scope of the technical solution disclosed in this utility model, without changing the principle, should also be considered within the scope of protection of this utility model.

Claims

1. A radial flux electromagnetic coupling, characterized in that: It includes a drive shaft, a driven shaft, a drive shaft rotor, permanent magnets, an iron core, magnetic pole coils, connecting wires, and a driven shaft. The drive shaft rotor is fixed on the drive shaft, and the permanent magnets are uniformly fixed on the inner surface of the drive shaft rotor along the circumference, with adjacent permanent magnets having opposite polarities. The iron core is fixed on the driven shaft, and the magnetic pole coils are embedded in the iron core, with adjacent magnetic pole coils having opposite winding directions. The permanent magnets and the iron core are radially aligned to form a radial magnetic flux coupling structure.

2. The radial flux electromagnetic coupling according to claim 1, characterized in that: The magnetic pole coil is fitted with a protective ring.

3. The radial flux electromagnetic coupling according to claim 1, characterized in that: The magnetic pole coil is also fixed to the iron core by a fixing bracket.

4. The radial flux electromagnetic coupling according to claim 1, characterized in that: The connecting wire is connected to the magnetic pole coil, and the magnetic pole coil is connected to an external DC power supply through the connecting wire.

5. The radial flux electromagnetic coupling according to claim 1, characterized in that: External DC power is provided by brushes, a brushless excitation system, or a wireless power transmission device.

6. The radial flux electromagnetic coupling according to claim 1, characterized in that: The inner diameter of the permanent magnet body and the outer diameter of the iron core are concentric.

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