Hybrid excitation rotor with slip ring structure

Abstract

The invention relates to a hybrid excitation rotor with a slip ring structure, which is applied to the field of motor rotors, and can drive a power structure to move under the action of airflow in a motor when the excitation rotor in the motor is subjected to air cooling heat dissipation through the cooperation of a dust collection cylinder and a rotary dust collection cylinder, thereby driving the rotary dust collection cylinder to rotate; therefore, after abrasive dust collected by the part, exposed out of the dust collecting cylinder, of the rotating dust collecting cylinder is transferred into the dust collecting cylinder, abrasive dust adsorbed on the surface of the electrostatic plate is pushed away through the magnetic attraction effect of the magnetic plate and the magnetic sliding block, circulation of abrasive dust collection, collection and recollection is achieved, and then sustainable operation of dust collection on the surface of the rotating dust collecting cylinder is achieved. And during air cooling heat dissipation, the driving piece is used for replacing an electromagnetic block, staggered heat dissipation of the combined sliding ring is achieved in an auxiliary mode, and use of electric power can be reduced.

Description

Technical Field

[0001] The 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 excitation rotor is a component in a motor or generator. Its main function is to generate a rotating magnetic field by receiving direct current. This magnetic field interacts with the current in the stator winding, thereby inducing an AC voltage in the stator winding. It is usually composed of a rotor core, an excitation winding, and a slip ring. The rotor core is used to fix the excitation winding, while the slip ring is used to introduce an external power supply into the excitation winding. It plays a vital role in modern power systems. It is not only related to the normal operation of the generator, but also directly affects the stability and security of the entire power grid.

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

[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 suction plate, which will cause the grinding chips inside the motor to float again, affecting 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 inside the motor and effective collection and control of internal wear debris to avoid secondary disturbance.

[0006] In order 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, a symmetrically arranged slide groove is provided on the surface of the inner slip ring, a movable block is slidably installed inside the slide groove, an outer slip ring is fixedly connected to the top of the movable block, a heat dissipation hole is penetrated inside the outer slip ring, a dust collecting cylinder corresponding to the heat dissipation hole is installed on the surface of the outer slip ring on one side away from the excitation rotor, a ventilation hood is installed on the surface of the dust collecting cylinder on one side away from the outer slip ring, and both the dust collecting cylinder and the ventilation hood are made of waterproof and breathable materials; The surface of the dust collecting cylinder is provided with a through groove, a rotating dust collecting cylinder is installed inside the through groove through a rotating shaft, a plurality of strip grooves arranged around the surface of the rotating dust collecting cylinder are provided, an electrostatic plate is installed inside the strip groove, an elastic member is connected to the bottom wall of the strip groove, one end of the elastic member is connected to a magnetic slider slidably connected to the surface of the electrostatic plate, and a magnetic plate that attracts the magnetic slider is installed in the center of the dust collecting cylinder; A power structure located inside the ventilation hood is installed on the surface of the dust collecting cylinder on one side facing away from the excitation rotor.

[0007] In the hybrid excitation rotor with a slip ring structure, through the cooperation of the dust collecting cylinder and the rotating dust collecting cylinder, when the excitation rotor in the motor is air-cooled, efficient heat dissipation of the combined slip ring and effective collection and control of wear debris can be achieved.

[0008] 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 round 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 round 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 meshingly connected with a rack, and the bottom of the rack is connected to an extension plate overlapped on the surface of the elliptical plate.

[0009] As a further improvement of the present application, an electromagnetic block is embedded and installed on the inner wall of the slide slot on one side close to the excitation rotor, and the surface of the movable block is coated with a magnetic attraction layer.

[0010] 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.

[0011] 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.

[0012] As a further improvement of the present application, it also includes a heat dissipation and dust collection system, the heat dissipation system dust collector 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, which is used to monitor 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.

[0013] 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 ducts are opened on the surface of the driving member, each of which is equipped with an electromagnetic valve, and the inside of the two ventilation ducts are respectively equipped with one-way valves in opposite directions. The inside of the driving member is slidably installed with 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 reset elastic parts are installed on the surfaces of the two movable parts close to each other.

[0014] As another improvement supplement of the present application, the cross section of the surfaces of the two movable parts close to 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.

[0015] To summarize, through the cooperation of the dust collecting barrel and the rotating dust collecting barrel, when the excitation rotor in the motor is air-cooled, 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 part of the collected debris exposed outside the rotating dust collecting barrel is transferred to the dust collecting barrel, and the 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, thereby realizing a cycle of debris collection, collection, and re-collection, thereby realizing sustainable dust collection on the surface of the rotating dust collecting barrel, and when air-cooled, the driving part is used to replace the electromagnetic block to assist in realizing the staggered heat dissipation of the combined slip ring and reduce the use of electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall appearance structure of the first implementation method of the present application; Figure 2 This is an installation diagram of a combined slip ring, a dust collecting tube and a heat dissipation hole in the first embodiment of the present application; Figure 3 This is a diagram showing the interior of the dust collection tube and the installation of the power structure of the first embodiment of the present application; Figure 4 This is a power structure installation diagram of the first embodiment of this application; Figure 5 This is a schematic diagram of the heat dissipation state of the combined slip ring in the first embodiment of the present application; Figure 6 This is a diagram showing the rotating state of the rotating dust collecting barrel according to the first embodiment of the present application; 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; Figure 8 It is a schematic diagram of the rotating state of the dust collecting bin in the first embodiment of the present application; Fig. 9 This is an installation diagram of a driving member according to a second embodiment of the present application; Fig.10This is an internal structural diagram of a driving member according to a second embodiment of the present application; Fig.11 This is a diagram of the state in which the movable part is pushed to move when air is taken in from inside the driving part according to the second embodiment of the present application.

[0017] Description of the numbers in the figure: 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

[0018] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0019] The first implementation method: Figure 1-3 A hybrid excitation rotor with a slip ring structure is shown, 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 are installed on the surface of the rotor shaft 1, 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 slide grooves, a movable block 32 is slidably installed inside the slide groove, 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 cylinder 4 corresponding to the heat dissipation hole 5 is installed on the surface of the outer slip ring 33 on one side facing away from the excitation rotor 2, a ventilation cover 41 is installed on the surface of the dust collecting cylinder 4 on one side facing 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; Figure 7 As shown, the surface of the dust collecting cylinder 4 is provided with a through groove, and a rotating dust collecting cylinder 6 is installed inside the through groove through a rotating shaft, and the surface of the rotating dust collecting cylinder 6 is provided with a plurality of strip grooves arranged around, and an electrostatic plate 61 is installed inside the strip groove, and an elastic member 63 is connected to the bottom wall of the strip groove, 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, and a magnetic plate 8 is installed in the center of the dust collecting cylinder 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 facing away from the excitation rotor 2 .

[0020] An electromagnetic block is embedded and installed on the inner wall of the slide groove near the excitation rotor 2, the surface of the movable block 32 is coated with a magnetic attraction 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.

[0021] 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 is started synchronously with the electromagnetic block, 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 both made of conductive materials, even if a misaligned arrangement occurs, the overall conductivity of the combined slip ring 3 will not be destroyed (e.g. Figure 5 shown); After the wind force 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.

[0022] When the cooling fan is working, airflow can be generated, which can carry the grinding dust in the motor and make it fly. At this time, the electrostatic plate 61 in the rotating dust collecting tube 6 will absorb the grinding dust under the action of electrostatic absorption and rotate it to the inside of the dust collecting tube 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 tube 4 and preventing the grinding dust inside the dust collecting tube 4 from re-attaching to the surface of the electrostatic plate 61. After that, as the rotating dust collecting tube 6 rotates, the magnetic slider 62 can be driven to gradually separate from the inside of the dust collecting tube 4. After losing the magnetic attraction, the elastic member 63 will cause the magnetic slider 62 to reset and expose the electrostatic plate 61, so as to facilitate the continued dust collection (such as Figure 8 shown); 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 because 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 air flows through, and can also effectively collect the wear debris.

[0023] 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.

[0024] 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 .

[0025] Specifically, because the rotor shaft 1 is in a rotating state, when the rotating dust collecting barrel 6 is in a lower position, the magnetic slider 62 exposed to the outside of the dust collecting barrel 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 sliding of the magnetic slider 62, thereby ensuring the effective adsorption area of ​​the electrostatic plate 61.

[0026] 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 round shaft rod 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 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 a No. 3 gear 75 is fixedly sleeved on the end surface, the surface of the No. 3 gear 75 is meshingly connected 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.

[0027] 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. Figure 6 It is shown that when rotating, the airflow enters the ventilation hood 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, and thus drives 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.

[0028] 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.

[0029] 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.

[0030] It also includes a heat dissipation and dust collection system, wherein the heat dissipation system dust collection 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.

[0031] The second implementation method: Figure 9-10 The replacement structure of the electromagnetic block is shown as a driving member 9, which is installed in the middle of the two outer slip rings 33. The surface of the driving member 9 is provided with two ventilation pipes each equipped with an electromagnetic 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 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.

[0032] 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 .

[0033] 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.

[0034] Specifically, one of the two ventilation pipes is an air inlet pipe, and the other is an 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 driving effect, so that the outer sliding ring 33 moves outward to form a staggered state with the inner sliding ring 31, which is convenient for heat dissipation (such as Fig.11 shown); 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 approach each other and drive the gas inside the extrusion drive member 9 to be squeezed out, thereby driving the two outer slip rings 33 to approach each other, so that the two combined slip rings 3 can be reset.

[0035] 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 can be 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 abrasive dust exposed outside the dust collecting barrel 4 by the rotating dust collecting barrel 6 is transferred to the dust collecting barrel 4, and then the abrasive 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, so as to realize the cycle of collecting, collecting and re-collecting abrasive dust, thereby realizing the continuous dust collection on the surface of the rotating dust collecting barrel 6, and when air-cooling and dissipating heat, 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.

[0036] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. 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 scope of protection 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 mounted inside the sliding groove; 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 cylinder (4) corresponding to the heat dissipation hole (5) is mounted on a side surface of the outer slip ring (33) facing away from the excitation rotor (2); a ventilation cover (41) is mounted on a side surface of the dust collecting cylinder (4) facing away from the outer slip ring (33); the dust collecting cylinder (4) and the ventilation cover (41) are both made of waterproof and breathable materials; The surface of the dust collecting cylinder (4) is provided with a through groove, a rotating dust collecting cylinder (6) is installed inside the through groove via a rotating shaft, the surface of the rotating dust collecting cylinder (6) is provided with a plurality of strip grooves arranged in a surrounding manner, an electrostatic plate (61) is installed inside the strip groove, a spring member (63) is connected to the bottom wall of the strip groove, one end of the spring member (63) is connected to a magnetic slider (62) slidably connected to the surface of the electrostatic plate (61), and a magnetic plate (8) that attracts the magnetic slider (62) is installed in the center of the dust collecting cylinder (4); 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).

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 a side of the dust collecting barrel (4) away from the excitation rotor (2) and a round shaft rod located outside the one-way rotating shaft (76); a blade group and a first gear (71) located behind the blade group are sleeved on the surface of the one-way rotating shaft (76); a second gear (72) meshingly connected to the first gear (71) and an elliptical plate (73) located behind the second gear (72) are fixedly sleeved on the surface of the round shaft rod; one end of the rotating shaft extends to the interior of the ventilation hood (41) and a third gear (75) is fixedly sleeved on the surface of the end portion; a rack (74) is meshingly connected to the surface of the third gear (75), and the bottom of the rack (74) is connected to an extension plate overlapped on the surface of the elliptical plate (73).

3. The hybrid excitation rotor with a slip ring structure according to claim 1, characterized in that: An electromagnetic block is embedded and installed on the inner wall of one side of the slide slot close to the excitation rotor (2), and the surface of the movable block (32) is coated with a magnetic attraction layer.

4. The hybrid excitation rotor with a slip ring structure according to claim 1, characterized in that: 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).

5. The hybrid excitation rotor with a slip ring structure according to claim 1, characterized in that: 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).

6. The hybrid excitation rotor with a slip ring structure according to claim 3, characterized in that: It also includes a heat dissipation and dust collection system, wherein the heat dissipation system dust collection 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.

7. The hybrid excitation rotor with a slip ring structure according to claim 3, characterized in that: The replacement structure of the electromagnetic block is a driving member (9), the driving member (9) being installed in the middle of two outer slip rings (33), the surface of the driving member (9) being provided with two ventilation ducts each equipped with an electromagnetic valve, and the insides of the two ventilation ducts being respectively equipped with one-way valves in opposite directions, the inside of the driving member (9) being slidably equipped with symmetrically arranged movable members (92), and the tail ends of the two movable members (92) being respectively fixedly connected to the surfaces of the two outer slip rings (33), and the surfaces of the two movable members (92) being close to each other being equipped with a reset elastic member (91).

8. The hybrid excitation rotor with a slip ring structure according to claim 7, characterized in that: The cross-section of the surfaces of the two movable parts (92) approaching each other is the same as the inner cross-section of the driving part (9), and the initial elastic force of the resetting elastic part (91) is greater than the gravity of the movable part (92).

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