Direct current distance adjusting device for magnetic coupler

Abstract

The application discloses a DC distance adjusting device of a magnetic coupling, relates to the motor speed regulation technical field, and solves the problems of high cost, low precision and complex structure of the magnetic coupling speed regulation mode. The application comprises a load, a DC distance adjusting device and a driving motor which are connected in sequence, the DC distance adjusting device comprises a conductor rotor, a permanent magnet rotor, an electromagnet and a plurality of springs, the conductor rotor is arranged on the shaft of the load, the permanent magnet rotor is arranged on the output shaft of the driving motor in a sliding mode, the electromagnet is arranged between the permanent magnet rotor and the driving motor, a plurality of springs are arranged on the output shaft, one end of each spring is connected with the permanent magnet rotor, and the other end of each spring is connected with the output shaft. The application changes the size of the DC current, changes the magnetic force of the electromagnet on the permanent magnet rotor, adjusts the size of the distance between the shaft couplings, and achieves the purpose of speed regulation.

Description

Technical Field

[0001] This invention relates to the field of motor speed control technology, specifically to a DC pitch control device for a magnetic coupler. Background Technology

[0002] AC asynchronous motors are widely used due to their simple structure and reliable performance. At their rated frequency, the motor's speed is essentially constant. Since most industrial loads operate under dynamic conditions, motor speed regulation is essential. Currently, commonly used speed control devices include frequency converters, magnetic couplers, and hydraulic couplers. The non-contact nature of magnetic couplers during transmission provides them with built-in overload protection compared to traditional contact couplings. In terms of speed regulation performance, compared to frequency converters, they are simpler in structure, more adaptable to different environments, produce no harmonic pollution, and are less expensive; compared to hydraulic couplers, they have higher power density, smaller overall size, do not require oil as a transmission medium, and have less environmental impact. Therefore, magnetic couplers have a very broad application prospect.

[0003] The core method of speed regulation using magnetic couplers is to change the air gap thickness between the permanent magnet rotor and the conductor rotor, thereby altering the transmitted torque and ultimately achieving speed regulation. Existing solutions mainly fall into three categories: ball screw type, electric actuator type, and swing arm type. The ball screw type is sensitive to dust and foreign objects, requires high maintenance, and is costly. The swing arm type has a complex structure, is prone to mechanical wear gaps, and has low repeatability. The electric actuator type requires significant axial space, and the need to install bearings between the actuator and the coupler rotor increases structural complexity. Furthermore, this structure requires a high level of dust and water resistance. Summary of the Invention

[0004] To address the problems of high cost, low accuracy, and complex structure associated with existing magnetic coupler speed control methods, this invention proposes a DC pitch adjustment device for magnetic couplers. This invention adjusts the coupling pitch by changing the magnitude of the DC current, thereby altering the magnetic force of the electromagnet on the permanent magnet rotor, and ultimately achieving speed control.

[0005] This invention proposes a DC pitch adjustment device for a magnetic coupler, which specifically includes a load, a DC pitch adjustment device, and a drive motor connected in sequence. The DC pitch adjustment device includes a conductor rotor, a permanent magnet rotor, an electromagnet, and several springs. The conductor rotor is disposed on the shaft of the load, the permanent magnet rotor is slidably disposed on the output shaft of the drive motor, and the electromagnet is disposed between the permanent magnet rotor and the drive motor. Several springs are disposed on the output shaft. One end of each spring is connected to the permanent magnet rotor, and the other end is connected to the output shaft.

[0006] Furthermore, the permanent magnet rotor is provided with a number of permanent magnets.

[0007] Furthermore, the permanent magnet has a fan-shaped structure and is evenly distributed around the circumference of the end face of the permanent magnet rotor facing the conductor rotor.

[0008] Furthermore, a copper ring is provided on the conductor rotor.

[0009] Furthermore, the springs are evenly distributed around the output shaft.

[0010] Furthermore, the output shaft is provided with a shoulder, and the spring is connected to the shoulder.

[0011] Furthermore, the shoulder and the permanent magnet rotor are provided with several mounting holes, and the end of the spring is disposed in the mounting hole.

[0012] Furthermore, the output shaft is a splined shaft.

[0013] Furthermore, one end of the electromagnet is connected to the base of the drive motor.

[0014] Furthermore, a key connection is used between the conductor rotor and the load shaft.

[0015] The beneficial effects of the DC pitch adjustment device for a magnetic coupler described in this invention are as follows: (1) The DC pitch adjustment device of the magnetic coupler described in this invention changes the magnitude of the DC current, thereby changing the magnetic force of the electromagnet on the permanent magnet rotor, thus adjusting the pitch between the permanent magnet rotor and the conductor rotor to achieve speed regulation. This solves the problems of existing magnetic coupler pitch adjustment mechanisms being complex in structure, high in cost, poor in environmental adaptability, and prone to mechanical wear. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the structure of a magnetic coupler according to the present invention; Figure 2 This is a schematic diagram of the structure of a DC pitch adjustment device for a magnetic coupler according to the present invention; Wherein: 1-load, 2-DC pitch control device, 3-drive motor, 4-conductor rotor, 5-permanent magnet, 6-permanent magnet rotor, 7-electromagnet, 8-spring, 9-shoulder, 10-output shaft, 11-copper ring. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. The described embodiments are merely some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] See Figures 1-2 This embodiment is described in detail. The DC pitch adjustment device of the magnetic coupler described in this embodiment specifically includes a load 1, a DC pitch adjustment device 2, and a drive motor 3 connected in sequence. The DC pitch adjustment device 2 includes a conductor rotor 4, a permanent magnet rotor 6, an electromagnet 7, and six springs 8. The conductor rotor 4 is mounted on the shaft of the load 1 and connected to the shaft of the load 1 via a key. The permanent magnet rotor 6 is slidably mounted on the output shaft 10 of the drive motor 3, and the output shaft 10 is a splined shaft. The electromagnet 7 is positioned between the permanent magnet rotor 6 and the drive motor 3, with its bottom fixed to the base of the drive motor 3. The magnetic force of the electromagnet 7 is adjusted by regulating the magnitude of the DC current flowing through it. Six springs 8 are evenly arranged around the circumference of the output shaft 10. One end of each spring 8 is connected to the permanent magnet rotor 6, and the other end is connected to the output shaft 10. Both the permanent magnet rotor 6 and the output shaft 10 have six mounting holes on their shoulders 9. One end of the spring 8 is installed in the mounting hole of the shoulder 9, and the other end of the spring 8 is installed in the corresponding mounting hole of the permanent magnet rotor 6. The two ends of the spring 8 are fixed by spot welding.

[0020] The permanent magnet rotor 6 is provided with a plurality of permanent magnets 5, which are fan-shaped and evenly distributed around the circumference of the end face of the permanent magnet rotor 6 facing the conductor rotor 4. The conductor rotor 4 is provided with a copper ring 11, which faces the permanent magnets 5.

[0021] The specific working process of the DC pitch adjustment device for a magnetic coupler described in this invention is as follows: When a direct current is applied to the electromagnet 7, a magnetic field is generated. Under the influence of this magnetic field, the electromagnet 7 exerts a magnetic attraction on the permanent magnet rotor 6, changing the balance point between the electromagnetic force and the spring force, thus achieving the function of gap adjustment. When the magnetic attraction is greater than the spring force of the spring 8, the magnetic attraction overcomes the spring force, causing the permanent magnet rotor 6 to move axially towards the end of the drive motor 3 on the output shaft 10, thereby increasing the air gap in the magnetic circuit between the permanent magnet rotor 6 and the conductor rotor 4. Conversely, when the magnetic attraction is less than the spring force, the spring force overcomes the magnetic attraction, causing the permanent magnet rotor 6 to move axially towards the end of the load 1 on the output shaft 10, thereby decreasing the air gap in the magnetic circuit. The size of the air gap determines the magnitude of the eddy current generated on the copper ring 11 by the rotating permanent magnet 5, which in turn determines the torque and speed transmitted from the permanent magnet rotor 6 to the conductor rotor 4. Ultimately, this achieves continuous speed regulation of the load without contact or wear by changing the magnitude of the external direct current.

[0022] In summary, the DC pitch adjustment device for a magnetic coupler described in this invention adjusts the distance between the permanent magnet rotor 6 and the conductor rotor 4 by changing the magnitude of the DC current, thereby altering the magnetic force exerted by the electromagnet 7 on the permanent magnet rotor 6, and thus achieving speed regulation. This solves the problems of existing magnetic coupler pitch adjustment mechanisms, such as complex structure, high cost, poor environmental adaptability, and susceptibility to mechanical wear.

[0023] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the invention. They can also be reasonable combinations of the features described in the above embodiments. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A DC pitch adjustment device for a magnetic coupler, characterized in that: The device includes a load (1), a DC pitch control device (2), and a drive motor (3) connected in sequence. The DC pitch control device (2) includes a conductor rotor (4), a permanent magnet rotor (6), an electromagnet (7), and several springs (8). The conductor rotor (4) is mounted on the shaft of the load (1), the permanent magnet rotor (6) is slidably mounted on the output shaft (10) of the drive motor (3), and the electromagnet (7) is mounted between the permanent magnet rotor (6) and the drive motor (3). Several springs (8) are mounted on the output shaft (10). One end of each spring (8) is connected to the permanent magnet rotor (6), and the other end is connected to the output shaft (10).

2. The DC pitch adjustment device for the magnetic coupler according to claim 1, characterized in that: The permanent magnet rotor (6) is provided with a number of permanent magnets (5).

3. The DC pitch adjustment device for the magnetic coupler according to claim 2, characterized in that: The permanent magnet (5) has a fan-shaped structure and is evenly distributed around the circumference of the end face of the permanent magnet rotor (6) facing the conductor rotor (4).

4. The DC pitch adjustment device for the magnetic coupler according to claim 3, characterized in that: A copper ring (11) is provided on the conductor rotor (4).

5. The DC pitch adjustment device for the magnetic coupler according to claim 1, characterized in that: The springs (8) are evenly distributed around the output shaft (10).

6. The DC pitch adjustment device for the magnetic coupler according to claim 5, characterized in that: The output shaft (10) is provided with a shoulder (9), and the spring (8) is connected to the shoulder (9).

7. The DC pitch adjustment device for the magnetic coupler according to claim 6, characterized in that: The shoulder (9) and the permanent magnet rotor (6) are provided with several mounting holes, and the end of the spring (8) is provided in the mounting hole.

8. The DC pitch adjustment device for the magnetic coupler according to claim 1, characterized in that: The output shaft (10) is a spline shaft.

9. The DC pitch adjustment device for the magnetic coupler according to claim 1, characterized in that: One end of the electromagnet (7) is connected to the base of the drive motor (3).

10. The DC pitch adjustment device for the magnetic coupler according to claim 1, characterized in that: The conductor rotor (4) and the load (1) are connected by a key.

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