A hybrid excitation rotor with a slip ring structure

Abstract

The present invention relates to a hybrid excitation rotor with a slip ring structure applied in the field of motor rotors. Through the cooperation of a dust collecting barrel and a rotating dust collecting barrel, when the excitation rotor in the motor is subjected to air cooling and heat dissipation, the airflow in the motor is utilized to drive the power structure to move, thereby driving the rotating dust collecting barrel to rotate, thereby transferring the collected wear debris exposed outside the rotating dust collecting barrel to the inside of the dust collecting barrel, and then pushing away the wear debris dust adsorbed on the surface of the electrostatic plate through the magnetic attraction of the magnetic plate and the magnetic slider, thereby realizing a cycle of wear debris collection, collection, and re-collection, thereby realizing sustainable dust collection on the surface of the rotating dust collecting barrel, and during air cooling and heat dissipation, utilizing a driving component to replace the electromagnetic block to assist in realizing the staggered heat dissipation of the combined slip ring and reduce the use of electricity.

Description

Technical Field

[0001] The present invention relates to a hybrid excitation rotor, in particular to a hybrid excitation rotor with a slip ring structure applied in the field of motor rotors. Background Art

[0002] The exciter rotor is a component in a motor or generator. Its primary function is to generate a rotating magnetic field by receiving direct current. This magnetic field interacts with the current in the stator winding, inducing an AC voltage in the stator winding. It typically consists of a rotor core, field winding, and slip rings. The rotor core secures the field winding, while the slip rings connect the external power supply to the field winding. It plays a crucial role in modern power systems. It not only affects the proper operation of the generator but also directly impacts the stability and security of the entire power grid.

[0003] The specification of Chinese invention patent CN202410909863.4 discloses a self-cleaning slip ring for wear chips, which proposes a wear chip collection method that is suitable for the narrow slip ring space and can quickly collect wear chips.

[0004] When cleaning the grinding chips, the existing slip ring uses powered dust suction to collect and process the dust. However, when the slip ring is air-cooled inside the motor, the airflow will blow away the dust accumulated on the surface of the dust collection plate, which will cause the grinding chips inside the motor to float again and affect the grinding chip collection effect. Summary of the Invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to achieve effective heat dissipation of the slip ring on the surface of the rotor shaft in the motor and effective collection and control of internal wear debris to avoid secondary disturbance.

[0006] To solve the above problems, the present invention provides a hybrid excitation rotor with a slip ring structure, comprising a rotor shaft installed in a motor, an excitation rotor and combined slip rings located on both sides of the excitation rotor installed on the surface of the rotor shaft, the combined slip ring comprising an inner slip ring fixedly sleeved on the surface of the rotor shaft, the surface of the inner slip ring being provided with symmetrically arranged slide grooves, a movable block being slidably installed inside the slide groove, an outer slip ring being fixedly connected to the top of the movable block, heat dissipation holes being penetrated inside the outer slip ring, a dust collecting cylinder corresponding to the heat dissipation holes being installed on the surface of the outer slip ring on the side facing away from the excitation rotor, a ventilation cover being installed on the surface of the dust collecting cylinder on the side facing away from the outer slip ring, and both the dust collecting cylinder and the ventilation cover being made of waterproof and breathable materials;

[0007] The surface of the dust collecting cylinder is provided with a through groove, and a rotating dust collecting cylinder is installed inside the through groove through a rotating shaft. The surface of the rotating dust collecting cylinder is provided with a plurality of strip grooves arranged around it, and an electrostatic plate is installed inside the strip groove. The bottom wall of the strip groove is connected to an elastic member, and one end of the elastic member is connected to a magnetic slider slidably connected to the surface of the electrostatic plate. A magnetic plate that attracts the magnetic slider is installed in the center of the dust collecting cylinder;

[0008] A power structure located inside the ventilation cover is installed on the surface of the dust collecting cylinder on one side facing away from the excitation rotor.

[0009] In the hybrid excitation rotor with a slip ring structure, the cooperation of the dust collecting cylinder and the rotating dust collecting cylinder can achieve efficient heat dissipation of the combined slip ring and effective collection and control of wear debris when the excitation rotor in the motor is air-cooled.

[0010] As a further improvement of the present application, the power structure includes a one-way rotating shaft rotatably connected to the surface of the dust collecting barrel away from the excitation rotor and a circular shaft located outside the one-way rotating shaft. The surface of the one-way rotating shaft is sleeved with a blade group and a No. 1 gear located behind the blade group. The surface of the circular shaft is fixedly sleeved with a No. 2 gear meshing with the No. 1 gear and an elliptical plate located behind the No. 2 gear. One end of the rotating shaft extends to the interior of the ventilation hood and the end surface is fixedly sleeved with a No. 3 gear. The surface of the No. 3 gear is meshed with a rack, and the bottom of the rack is connected to an extension plate overlapped with the surface of the elliptical plate.

[0011] As a further improvement of the present application, an electromagnetic block is embedded in the inner wall of the slideway close to the excitation rotor, and the surface of the movable block is coated with a magnetic attraction layer.

[0012] As a further improvement of the present application, the magnetic attraction force between the magnetic plate and the magnetic slider is greater than the initial elastic force of the elastic member, and the initial elastic force of the elastic member is greater than the gravity of the magnetic slider.

[0013] As a further improvement of the present application, the diameter of the dust collecting cylinder is larger than the diameter of the heat dissipation hole, and the magnetic plate is located below the rotating dust collecting cylinder.

[0014] As a further improvement of the present application, it also includes a heat dissipation and dust collection system, which is installed on the surface of the motor, and the heat dissipation and dust collection system includes a temperature monitoring system and a control execution system. The temperature monitoring system includes a temperature sensor installed in the motor for monitoring the temperature inside the motor, and the control execution system includes a heat dissipation fan installed on the outer surface of the motor, wherein the heat dissipation fan is connected to the electromagnetic block signal.

[0015] As another improvement of the present application, the replacement structure of the electromagnetic block is a driving member, which is installed in the middle of the two outer slip rings. Two ventilation pipes are opened on the surface of the driving member, each of which is equipped with a solenoid valve, and the inside of the two ventilation pipes are respectively equipped with one-way valves in opposite directions. The internal sliding installation of the driving member is symmetrically arranged movable parts, and the tail ends of the two movable parts are respectively fixedly connected to the surfaces of the two outer slip rings, and the surfaces of the two movable parts close to each other are equipped with reset elastic parts.

[0016] As another improved supplement of the present application, the cross-section of the surfaces of the two movable parts approaching each other is the same as the inner cross-section of the driving part, and the initial elastic force of the reset elastic part is greater than the gravity of the movable part.

[0017] To sum up, through the cooperation of the dust collecting barrel and the rotating dust collecting barrel, when the excitation rotor in the motor is air-cooled and dissipated, the airflow in the motor can be used to drive the power structure to move, and then drive the rotating dust collecting barrel to rotate, so that the collected wear debris exposed outside the rotating dust collecting barrel is transferred to the dust collecting barrel, and the wear debris dust adsorbed on the surface of the electrostatic plate is pushed away by the magnetic attraction of the magnetic plate and the magnetic slider, realizing the cycle of wear debris collection, collection, and re-collection, thereby realizing sustainable dust collection on the surface of the rotating dust collecting barrel, and using the drive component to replace the electromagnetic block during air cooling to assist in achieving staggered heat dissipation of the combined slip ring and reduce electricity usage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall appearance structure of the first embodiment of this application;

[0019] Figure 2 This is an installation diagram of the combined slip ring, dust collecting tube and heat dissipation hole of the first embodiment of the present application;

[0020] Figure 3 This is a diagram showing the interior of the dust collection container and the power structure installation of the first embodiment of the present application;

[0021] Figure 4 This is a power structure installation diagram of the first embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the heat dissipation state of the combined slip ring according to the first embodiment of the present application;

[0023] Figure 6 This is a diagram showing the rotating dust collecting barrel in the first embodiment of the present application;

[0024] Figure 7 This is a diagram showing the internal structure of the rotating dust collecting barrel according to the first embodiment of the present application;

[0025] Figure 8This is a schematic diagram of the dust collecting bin rotating in the dust collecting bin according to the first embodiment of the present application;

[0026] Figure 9 This is an installation diagram of a driving member according to a second embodiment of the present application;

[0027] Figure 10 This is a diagram showing the internal structure of a driving member according to a second embodiment of the present application;

[0028] Figure 11 This is a diagram of the state in which the driving member pushes the movable member to move when air is taken in from inside the driving member in the second embodiment of the present application.

[0029] Description of the numbers in the figure:

[0030] 1. Rotor shaft; 2. Excitation rotor; 3. Combined slip ring; 31. Inner slip ring; 32. Movable block; 33. Outer slip ring; 4. Dust collecting cylinder; 41. Ventilation hood; 5. Heat dissipation hole; 6. Rotating dust collecting cylinder; 61. Electrostatic plate; 62. Magnetic slider; 63. Elastic member; 7. Power structure; 71. Gear No. 1; 72. Gear No. 2; 73. Elliptical plate; 74. Rack; 75. Gear No. 3; 76. One-way shaft; 8. Magnetic plate; 9. Driving member; 91. Resetting elastic member; 92. Movable member. DETAILED DESCRIPTION

[0031] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0032] The first implementation method:

[0033] Figure 1-3 The present invention shows a hybrid excitation rotor with a slip ring structure, which includes a rotor shaft 1 installed in a motor, an excitation rotor 2 and combined slip rings 3 located on both sides of the excitation rotor 2, which are installed on the surface of the rotor shaft 1. The combined slip ring 3 includes an inner slip ring 31 fixedly sleeved on the surface of the rotor shaft 1, and a symmetrically arranged slide groove is provided on the surface of the inner slip ring 31. A movable block 32 is slidably installed inside the slide groove, and an outer slip ring 33 is fixedly connected to the top of the movable block 32. A heat dissipation hole 5 is penetrated inside the outer slip ring 33. A dust collecting barrel 4 corresponding to the heat dissipation hole 5 is installed on the surface of the outer slip ring 33 on the side facing away from the excitation rotor 2, and a ventilation cover 41 is installed on the surface of the dust collecting barrel 4 on the side facing away from the outer slip ring 33. Both the dust collecting barrel 4 and the ventilation cover 41 are made of waterproof and breathable materials.

[0034] Figure 7As shown, the surface of the dust collecting barrel 4 is provided with a through groove, and a rotating dust collecting barrel 6 is installed inside the through groove through a rotating shaft. The surface of the rotating dust collecting barrel 6 is provided with a plurality of strip grooves arranged around it, and an electrostatic plate 61 is installed inside the strip groove. The bottom wall of the strip groove is connected to an elastic member 63, and one end of the elastic member 63 is connected to a magnetic slider 62 slidably connected to the surface of the electrostatic plate 61. A magnetic plate 8 is installed in the center of the dust collecting barrel 4 to attract the magnetic slider 62.

[0035] A power structure 7 located inside the ventilation cover 41 is installed on the surface of the dust collecting cylinder 4 facing away from the excitation rotor 2 .

[0036] An electromagnetic block is embedded in the inner wall of the chute near the excitation rotor 2, and the surface of the movable block 32 is coated with a magnetic layer. The diameter of the dust collecting cylinder 4 is larger than the diameter of the heat dissipation hole 5, and the magnetic plate 8 is located below the rotating dust collecting cylinder 6.

[0037] Specifically, when the temperature inside the motor where the excitation rotor 2 is located rises during operation, the cooling fan on the surface of the motor starts, and air flow is sent into the motor for heat exchange and air cooling. During this process, the cooling fan and the electromagnetic block are started synchronously, and then a repulsive force is generated to drive the movable block 32 to move, so that the outer slip ring 33 and the inner slip ring 31 are relatively displaced, thereby increasing the overall heat dissipation area of ​​the combined slip ring 3 and improving the heat dissipation efficiency. In addition, since the inner slip ring 31 and the outer slip ring 33 are made of conductive materials, even if they are misaligned, the overall conductivity of the combined slip ring 3 will not be damaged (such as Figure 5 shown);

[0038] After the wind disappears, the cooling fan is turned off, and the electromagnetic block is started to generate a force of attraction with the movable block 32, so that the combined slip ring 3 can return to the structure of the same plane.

[0039] When the cooling fan is working, an air flow is generated, which carries the grinding dust in the motor into the air. At this time, the electrostatic plate 61 in the rotating dust collecting barrel 6 will absorb the grinding dust under the action of electrostatic absorption and rotate it to the inside of the dust collecting barrel 4 under the action of rotation. Under the action of gravity and magnetic attraction, the magnetic slider 62 will slide down and scrape the grinding dust adsorbed on the surface of the electrostatic plate 61 and push it away from the surface of the electrostatic plate 61, storing the grinding dust inside the dust collecting barrel 4 and preventing the grinding dust inside the dust collecting barrel 4 from re-attaching to the surface of the electrostatic plate 61. Later, as the rotating dust collecting barrel 6 rotates, the magnetic slider 62 can be driven to gradually separate from the inside of the dust collecting barrel 4. After losing the magnetic attraction, the elastic member 63 prompts the magnetic slider 62 to reset and expose the electrostatic plate 61, making it convenient to continue collecting dust (such as Figure 8 shown);

[0040] Through the above operation, the wear debris generated by the combined slip ring 3 in the motor during operation can be collected and restrained, and since the dust collecting tube 4 is made of waterproof and breathable material, it will not interfere with the ventilation and heat dissipation operation of the heat dissipation hole 5 when the airflow passes through, and can also effectively collect the wear debris.

[0041] A through hole is provided inside the magnetic plate 8 to ensure that the dust collecting space in the dust collecting cylinder 4 remains unobstructed.

[0042] The magnetic attraction force between the magnetic plate 8 and the magnetic slider 62 is greater than the initial elastic force of the elastic member 63 , and the initial elastic force of the elastic member 63 is greater than the gravity of the magnetic slider 62 .

[0043] Specifically, because the rotor shaft 1 is in a rotating state, when the rotating dust collecting bin 6 is in the lower position, the magnetic slider 62 exposed to the outside of the dust collecting bin 4 may slide down under the action of gravity, affecting the effective adsorption area of ​​the electrostatic plate 61. Since the initial elastic force of the elastic member 63 is greater than the gravity of the magnetic slider 62, the elastic force of the elastic member 63 can overcome the natural decline of the magnetic slider 62, thereby ensuring the effective adsorption area of ​​the electrostatic plate 61.

[0044] Figure 3-4 As shown, the power structure 7 includes a one-way rotating shaft 76 rotatably connected to the surface of the dust collecting barrel 4 on the side away from the excitation rotor 2 and a circular shaft rod located on the outside of the one-way rotating shaft 76. The surface of the one-way rotating shaft 76 is sleeved with a blade group and a No. 1 gear 71 located behind the blade group. The surface of the circular shaft rod is fixedly sleeved with a No. 2 gear 72 meshing with the No. 1 gear 71 and an elliptical plate 73 located behind the No. 2 gear 72. One end of the rotating shaft extends to the interior of the ventilation hood 41 and the end surface is fixedly sleeved with a No. 3 gear 75. The surface of the No. 3 gear 75 is meshed with a rack 74, and the bottom of the rack 74 is connected to an extension plate overlapped on the surface of the elliptical plate 73.

[0045] Specifically, when air cooling is performed inside the motor, due to the limitation of the one-way rotating shaft 76, the rotation direction of the blade group is in a single direction. Even if the airflow direction inside the motor is in a turbulent state, the rotation of the power structure 7 is in a relatively stable state.

[0046] Figure 6 It is shown that during rotation, the airflow enters the ventilation cover 41 and drives the blade group to rotate, and then drives the No. 1 gear 71 to rotate, and under the meshing action, drives the No. 2 gear 72 to rotate, thereby driving the elliptical plate 73 to rotate, so that the rack 74 is in a periodic rise and fall in the vertical direction, and then under the meshing action, drives the No. 3 gear 75 and the rotating dust collecting barrel 6 to rotate regularly.

[0047] Through the power structure 7, the airflow during air cooling can be used to provide a rotational force for rotating the dust collecting barrel 6, thereby avoiding the use of an electric push rod and achieving energy saving.

[0048] During the rotation of the elliptical plate 73 , the extension plate is always in contact and supported, thereby preventing the rack 74 from being separated from the elliptical plate 73 during the rotation.

[0049] It also includes a heat dissipation and dust collection system, which is installed on the surface of the motor, and the heat dissipation and dust collection system includes a temperature monitoring system and a control execution system. The temperature monitoring system includes a temperature sensor installed in the motor to monitor the temperature inside the motor. The control execution system includes a heat dissipation fan installed on the outer surface of the motor, wherein the heat dissipation fan is connected to the electromagnetic block signal.

[0050] Second implementation method:

[0051] Figure 9-10 The replacement structure of the electromagnetic block is shown to be a driving member 9, which is installed in the middle of the two outer slip rings 33. Two ventilation pipes are opened on the surface of the driving member 9, each of which is equipped with a solenoid valve, and the inside of the two ventilation pipes are respectively equipped with one-way valves in opposite directions. The inside of the driving member 9 is slidably installed with symmetrically arranged movable parts 92, and the tail ends of the two movable parts 92 are respectively fixedly connected to the surfaces of the two outer slip rings 33, and the surfaces of the two movable parts 92 close to each other are equipped with a reset elastic part 91.

[0052] The cross section of the surfaces of the two movable members 92 that are close to each other is the same as the inner cross section of the driving member 9 , and the initial elastic force of the reset elastic member 91 is greater than the gravity of the movable member 92 .

[0053] Different from the first embodiment, this embodiment improves the extended heat dissipation power of the combined slip ring 3 in the first embodiment, reduces the use of electromagnetic blocks, and reduces power consumption.

[0054] Specifically, one of the two ventilation pipes is the air inlet pipe and the other is the air outlet pipe, and the solenoid valves on the surfaces of the two pipes are not opened at the same time, and are in an open and closed state. Therefore, when the air is cooled, the air inlet pipe is opened and the air outlet pipe is closed, so the air flow enters the interior of the driving member 9 in one direction. As the air flow in the driving member 9 increases, the movable member 92 gradually moves to both sides, which can form a pushing effect, so that the outer sliding ring 33 moves outward, forming a staggered state with the inner sliding ring 31, which is convenient for heat dissipation (such as Figure 11 shown);

[0055] After the air cooling is completed, the air inlet pipe is closed and the air outlet pipe is opened. Under the action of the reset elastic member 91, the two movable members 92 move closer to each other and drive the gas inside the extrusion drive member 9 to be squeezed out, thereby driving the two outer slip rings 33 closer to each other, so that the two combined slip rings 3 can be reset.

[0056] In summary, the present application cooperates with the dust collecting barrel 4 and the rotating dust collecting barrel 6, and when the excitation rotor 2 in the motor is air-cooled and dissipated, the airflow in the motor is used to drive the power structure 7 to move, and then drive the rotating dust collecting barrel 6 to rotate, so that the part of the collected grinding debris exposed outside the dust collecting barrel 4 by the rotating dust collecting barrel 6 is transferred to the dust collecting barrel 4, and the grinding dust adsorbed on the surface of the electrostatic plate 61 is pushed away by the magnetic attraction of the magnetic plate 8 and the magnetic slider 62, thereby realizing a cycle of collecting, collecting and re-collecting grinding debris, and thus realizing sustainable dust collection on the surface of the rotating dust collecting barrel 6, and when dissipating heat by air, the driving part 9 is used to replace the electromagnetic block to assist in realizing the staggered heat dissipation of the combined slip ring 3 and reduce the use of electricity.

[0057] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A hybrid excitation rotor with a slip ring structure, comprising a rotor shaft (1) installed in a motor, an excitation rotor (2) and combined slip rings (3) located on both sides of the excitation rotor (2) mounted on the surface of the rotor shaft (1), characterized in that: The combined slip ring (3) comprises an inner slip ring (31) fixedly sleeved on the surface of the rotor shaft (1), the surface of the inner slip ring (31) is provided with symmetrically arranged sliding grooves, a movable block (32) is slidably installed inside the sliding groove, the top of the movable block (32) is fixedly connected to the outer slip ring (33), the interior of the outer slip ring (33) is penetrated by heat dissipation holes (5), a dust collecting cylinder (4) corresponding to the heat dissipation holes (5) is installed on the surface of the side of the outer slip ring (33) away from the excitation rotor (2), and a ventilation cover (41) is installed on the surface of the dust collecting cylinder (4) away from the outer slip ring (33), and both the dust collecting cylinder (4) and the ventilation cover (41) are made of waterproof and breathable materials; The surface of the dust collecting barrel (4) is provided with a through groove, a rotating dust collecting barrel (6) is installed inside the through groove via a rotating shaft, the surface of the rotating dust collecting barrel (6) is provided with a plurality of strip grooves arranged around, an electrostatic plate (61) is installed inside the strip groove, the bottom wall of the strip groove is connected to an elastic member (63), one end of the elastic member (63) is connected to a magnetic slider (62) slidably connected to the surface of the electrostatic plate (61), and a magnetic plate (8) is installed in the center of the dust collecting barrel (4) to attract the magnetic slider (62); A power structure (7) located inside the ventilation cover (41) is installed on the surface of the dust collecting cylinder (4) on the side facing away from the excitation rotor (2); An electromagnetic block is embedded in the inner wall of one side of the slide close to the excitation rotor (2), and the surface of the movable block (32) is coated with a magnetic attraction layer. The magnetic attraction force between the magnetic plate (8) and the magnetic slider (62) is greater than the initial elastic force of the elastic member (63), and the initial elastic force of the elastic member (63) is greater than the gravity of the magnetic slider (62). The diameter of the dust collecting cylinder (4) is greater than the diameter of the heat dissipation hole (5), and the magnetic plate (8) is located below the rotating dust collecting cylinder (6).

2. The hybrid excitation rotor with a slip ring structure according to claim 1, characterized in that: The power structure (7) comprises a one-way rotating shaft (76) rotatably connected to the surface of the dust collecting barrel (4) on the side facing away from the excitation rotor (2) and a round shaft located outside the one-way rotating shaft (76); the surface of the one-way rotating shaft (76) is sleeved with a blade group and a No. 1 gear (71) located behind the blade group; the surface of the round shaft is fixedly sleeved with a No. 2 gear (72) meshing with the No. 1 gear (71) and an elliptical plate (73) located behind the No. 2 gear (72); one end of the rotating shaft extends to the interior of the ventilation cover (41) and the end surface is fixedly sleeved with a No. 3 gear (75); the surface of the No. 3 gear (75) is meshed with a rack (74), and the bottom of the rack (74) is connected to an extension plate overlapped with the surface of the elliptical plate (73).

3. The hybrid excitation rotor with a slip ring structure according to claim 1, characterized in that: It also includes a heat dissipation and dust collection system, which is installed on the surface of the motor, and the heat dissipation and dust collection system includes a temperature monitoring system and a control execution system. The temperature monitoring system includes a temperature sensor installed in the motor to monitor the temperature inside the motor. The control execution system includes a heat dissipation fan installed on the outer surface of the motor, wherein the heat dissipation fan is connected to the electromagnetic block signal.

4. The hybrid excitation rotor with a slip ring structure according to claim 1, characterized in that: The replacement structure of the electromagnetic block is a driving member (9), which is installed in the middle of the two outer slip rings (33). Two ventilation pipes are provided on the surface of the driving member (9), each of which is equipped with a solenoid valve, and the insides of the two ventilation pipes are respectively equipped with one-way valves in opposite directions. The inside of the driving member (9) is slidably installed with symmetrically arranged movable members (92), and the tail ends of the two movable members (92) are respectively fixedly connected to the surfaces of the two outer slip rings (33). The surfaces of the two movable members (92) close to each other are equipped with a reset elastic member (91).

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