Generator set slip ring purging structure

Abstract

The application provides a generator set slip ring blowing structure, which comprises a dust collecting groove, the dust collecting groove is annular and is fixed between a generator cover and the slip ring, an annular nozzle is fixedly arranged above the slip ring in the generator cover, a plurality of nozzles are arranged on the annular nozzle, and the outlet of each nozzle is arranged towards the adjacent carbon brush, wherein the annular nozzle is further fixedly connected with an air inlet pipe, and the free end of the air inlet pipe extends out of the generator cover; and a negative pressure assembly arranged outside the generator cover is further provided, and the negative pressure assembly is connected with the dust collecting groove so that the dust collecting groove is in a negative pressure state. The application solves the problem that the generator needs to be frequently disassembled for dust cleaning, the generator operation is suspended, and the maintenance personnel face certain safety risks in the prior art.

Description

Technical Field

[0001] This invention relates to the technical field of maintenance components for the internal structure of generator sets, and in particular to a slip ring purging structure for generator sets. Background Technology

[0002] Slip rings, also known as conductor rings, are used in any electromechanical system that requires both connection and transmission of power and signals from a fixed position to a rotating position. Slip rings, commonly called conductive slip rings, are the rotating joints where the rotor and stator rub against each other. Generator slip rings are one type. Motor slip rings primarily convert electrical energy, allowing current to pass through rotating sliding contacts and be converted into usable electrical energy. They are electrical components responsible for connecting and transmitting current and signals to the rotating body, and are typically installed at the rotation center of the equipment.

[0003] Carbon brushes, also known as electrical brushes, are widely used in many electrical devices as sliding contact components. The main materials used in carbon brush applications include graphite, resin-impregnated graphite, and metallic (including copper and silver) graphite. A carbon brush is a device that transmits energy or signals between the stationary and rotating parts of an electric motor, generator, or other rotating machinery. It is generally made of pure carbon with a solidifying agent, and is typically square in shape, held in place by a metal bracket. A spring inside presses it firmly against the rotating shaft. When the motor rotates, it transmits electrical energy to the coils through a commutator. Because its main component is carbon, it is called a carbon brush.

[0004] The friction between carbon brushes and rotating parts generates a lot of dust. Because the generator shroud is sealed during operation, with only vents around the shroud, dust accumulates over time and requires regular cleaning. If cleaning is not timely, excessive dust can lead to the following problems: first, it worsens the insulation of the slip rings to ground; second, it reduces the insulation of the stator and rotor windings; third, it blocks the core air ducts, causing temperature rise; and fourth, the generator becomes more susceptible to moisture absorption. Therefore, timely slip ring cleaning is essential.

[0005] In existing technologies, dust removal typically requires frequent disassembly of the machine, followed by wiping components such as carbon brushes and slip rings with tools like cotton cloths. This frequent disassembly can cause generator shutdowns and also exposes maintenance personnel to certain safety risks. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a generator slip ring purging structure, which solves the problem that frequent disassembly for dust cleaning in existing technologies leads to generator shutdowns and poses certain safety risks to maintenance personnel.

[0007] According to an embodiment of the present invention, a generator set slip ring purging structure is provided, wherein a plurality of carbon brushes are provided on the slip ring, and a generator outer cover is provided outside the slip ring. The purging structure includes a dust collection groove, which is annular and fixedly disposed between the generator outer cover and the slip ring. An annular nozzle is also fixedly disposed inside the generator outer cover and arranged around the slip ring directly above it. A plurality of nozzles are installed on the annular nozzle, and the outlet of each nozzle is arranged facing the adjacent carbon brush. The annular nozzle is also fixedly connected to an air inlet pipe, and the free end of the air inlet pipe extends outside the generator outer cover. The structure also includes a negative pressure component disposed outside the generator outer cover, which is connected to the dust collection groove to keep the dust collection groove under negative pressure.

[0008] In the above embodiment, one end of the air intake pipe is located outside the generator casing to receive airflow. After passing through the air intake pipe, the airflow enters the annular nozzle and is then sprayed out through each nozzle towards the carbon brush below, thereby blowing away the generated dust from the carbon brush. A dust collection tank is also provided inside the generator casing. With the assistance of the negative pressure component, the blown-away dust will enter the dust collection tank where there is negative pressure, thereby ensuring that components such as slip rings and carbon brushes are not disturbed by dust. Therefore, the frequency of maintenance can be reduced, thereby reducing the number of shutdowns and disassemblies, and also reducing the safety risks faced by maintenance personnel. This solves the problem in the prior art that frequent disassembly for dust cleaning leads to generator shutdown and certain safety risks for maintenance personnel.

[0009] Furthermore, a door is also provided on the generator casing, and the door is located above the dust collection trough.

[0010] Furthermore, the powder collecting groove is located below the slip ring, and the upward projection of the inner edge of the powder collecting groove is located on the lower wall surface of the slip ring.

[0011] Furthermore, the powder collecting trough also contains several flexible powder collecting blocks, all of which are connected end to end to form a ring structure with the upper end of the ring structure protruding from the powder collecting trough.

[0012] Furthermore, the flexible powder collecting block comprises a porous flexible material.

[0013] Furthermore, the powder collecting trough includes an annular trough body and a buffer ring located within the annular trough body. The buffer ring is also connected to an inclined ring located within it. The end of the inclined ring facing away from the buffer ring is inclined upward and located directly below the slip ring. The flexible powder collecting block is stuck in the annular trough body.

[0014] Furthermore, the annular groove body is lower than the buffer ring, and a plurality of leakage holes are formed on the bottom surface of the annular groove body; the negative pressure assembly includes a discharge pipe, one end of which is connected to all the leakage holes, and the other end extends to the outside of the generator casing.

[0015] Furthermore, the nozzle and the carbon brush correspond one-to-one.

[0016] Furthermore, the annular nozzle is also fixedly connected to a connecting rod, which is located on both sides of the annular nozzle opposite to the air intake pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By adding a dust collection trough inside the generator casing and a negative pressure component outside the generator casing, dust can be temporarily stored in the dust collection trough. At the same time, with the addition of annular spray pipes and nozzles, the dust can be efficiently removed from the carbon brushes, thereby avoiding adverse effects of dust on components such as carbon brushes and slip rings. This reduces the frequency of shutdown and disassembly, reduces the safety risks faced by maintenance personnel, and solves the problem in the existing technology that requires frequent disassembly to clean dust, which leads to generator operation interruption and certain safety risks to maintenance personnel. Attached Figure Description

[0019] Figure 1 This is a top view of the internal structure of a generator set in the prior art;

[0020] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0021] Figure 3 for Figure 2 Enlarged schematic diagram of a local structure at point A;

[0022] In the above attached figures:

[0023] 1. Generator main shaft, 2. Slip ring, 3. Carbon brush, 4. Generator housing, 5. Dust collection trough, 6. Annular nozzle, 7. Inlet pipe, 8. Connecting rod, 9. Door body, 10. Flexible dust collection block, 11. Annular trough body, 12. Buffer ring, 13. Inclined ring, 14. Leakage hole, 15. Outlet pipe, 16. Detailed Implementation

[0024] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] like Figure 1 , 2 As shown in Figure 3, this embodiment provides a generator set slip ring purging structure. The slip ring 2 is provided with several carbon brushes 3. A generator outer cover 4 is also provided outside the slip ring 2. The purging structure includes a dust collection groove 5, which is annular and fixedly disposed between the generator outer cover 4 and the slip ring 2. An annular nozzle 6 is also fixedly disposed inside the generator outer cover 4, surrounding the slip ring 2. Several nozzles 7 are installed on the annular nozzle 6, with each nozzle 7's outlet facing the adjacent carbon brush 3. The nozzles 7 and carbon brushes 3 are arranged in a one-to-one correspondence, thus enabling… This allows the nozzle 7 to be aligned with the adjacent carbon brush 3, thereby more efficiently blowing away the generated dust. The annular nozzle 6 is also fixedly connected to an air inlet pipe 8, with the free end of the air inlet pipe 8 extending outside the generator housing 4. It also includes a negative pressure assembly disposed outside the generator housing 4, which is connected to the dust collection tank 5 to keep the dust collection tank 5 under negative pressure. The annular nozzle 6 is also fixedly connected to a connecting rod 9, which is disposed on opposite sides of the annular nozzle 6, thus improving the stability of the annular nozzle 6 through the connecting rod 9 and the air inlet pipe 8.

[0027] In the above embodiment, one end of the air intake pipe 8 is located outside the generator housing 4 and is used to receive airflow (airflow can be sent into the air intake pipe 8 through a blower outside the generator housing 4). After passing through the air intake pipe 8, the airflow enters the annular nozzle 6 and then is sprayed out to the carbon brush 3 below through each nozzle 7, thereby blowing away the generated dust from the carbon brush 3. A dust collection tank 5 is also provided inside the generator housing 4. With the assistance of the negative pressure component, the blown-away dust will enter the dust collection tank 5 with negative pressure, thereby ensuring that components such as the slip ring 2 and carbon brush 3 are not disturbed by dust. Therefore, the frequency of maintenance can be reduced, thereby reducing the number of shutdowns and disassemblies, and also reducing the safety risks faced by maintenance personnel. This solves the problem in the prior art that frequent disassembly for dust cleaning leads to generator shutdown and certain safety risks faced by maintenance personnel.

[0028] In this embodiment, the negative pressure component is used to provide negative pressure so that dust can more easily enter the dust collection tank 5 instead of directly extracting the dust. This is to avoid excessive suction force from causing adverse effects on other components, such as causing the carbon brush 3 to shake. Similarly, the airflow introduced through the air intake pipe 8 is also relatively small to avoid causing adverse effects on other components.

[0029] like Figure 2 , 3 As shown, preferably, the generator casing 4 is also provided with a door 10, which is located above the dust collection trough 5. The door 10 is provided to facilitate the cleaning of dust in the dust collection trough 5. Specifically, the dust collection trough 5 is also fitted with several flexible dust collection blocks 11. All the flexible dust collection blocks 11 are connected end to end to form a ring structure, and the upper end of the ring structure protrudes from the dust collection trough 5. In this way, the flexible dust collection blocks 11 can provide dust for adhesion, thereby preventing the airflow from the nozzle 7 from causing the dust to be re-raised. The flexible dust collection blocks 11 are made of porous flexible material, such as seaweed. Cotton blocks, cotton yarn segments, etc., can be trapped in the dust collection trough 5, and have a certain degree of fluffiness. Under the action of the negative pressure component, the blown dust enters the pores inside the flexible dust collection block 11. At the same time, the pore structure can retain the dust and prevent it from being drawn away. Therefore, only suction force needs to be provided outside the generator cover 4, and there is no need to consider the problem of dust interception. When the resistance of the suction force provided outside the generator cover increases, it indicates that the internal flexible dust collection block 11 has reached a saturation state. At this time, the machine should be stopped for maintenance, and the door 10 should be opened to replace and clean the flexible dust collection block 11.

[0030] like Figure 2 , 3 As shown, in this embodiment, the dust collection trough 5 extends below the slip ring 2 to prevent dust from entering the dust collection trough 5 below the slip ring 2. Specifically, the dust collection trough 5 is located below the slip ring 2, and the upward projection of the inner edge of the dust collection trough 5 is located on the lower wall surface of the slip ring 2. A gap is left between the dust collection trough 5 and the slip ring 2 to avoid contact between them.

[0031] like Figure 2 , 3As shown, preferably, the dust collection trough 5 includes an annular trough body 12 and a buffer ring 13 located within the annular trough body 12. The annular trough body 12 is fixedly connected to the inner wall of the generator's outer periphery. The buffer ring 13 is also connected to an inclined ring 14 located within it. The inclined ring 14, with one end facing upwards away from the buffer ring 13, is located directly below the slip ring 2. The flexible dust collection block 11 is inserted into the annular trough body 12 at the position of the buffer ring 13. When the flexible dust collection block 11 is not saturated, more dust will enter the flexible dust collection block 11, rather than... The dust will remain on the buffer ring 13. When the flexible dust collecting block 11 is saturated (or close to saturation), some dust will not be able to enter the flexible dust collecting block 11. Therefore, the buffer ring 13 provides a space for this part of the dust to enter. In particular, part of the flexible dust collecting block 11 extends above the annular groove body 12. The extended part of the flexible dust collecting block 11, the buffer ring 13, and the inclined ring 14 form another annular groove structure for this part of the dust to enter, thereby reserving a buffer time for shutdown maintenance. At the same time, this can prevent the dust from escaping to other locations during the buffer time.

[0032] like Figure 2 , 3 As shown, preferably, the annular groove body 12 is lower than the buffer ring 13 and a plurality of leakage holes 15 are provided on the inner bottom surface of the annular groove body 12; the negative pressure assembly includes an outlet pipe 16, one end of the outlet pipe 16 is connected to all the leakage holes 15 and the other end extends to the outside of the generator cover 4, that is, negative pressure can be provided through the outlet pipe 16 by a separately provided exhaust fan outside the generator cover, and the provided leakage holes 15 serve as a connection function, while also intercepting the flexible powder collection block 11.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A generator set slip ring purging structure, wherein a plurality of carbon brushes are provided on the slip ring, and a generator cover is provided outside the slip ring, characterized in that, The system includes a dust collection trough, which is annular and fixedly disposed between the generator housing and the slip ring. An annular nozzle, positioned above the slip ring and fixedly disposed within the generator housing, is also included. The annular nozzle has several nozzles mounted on it, with each nozzle outlet facing the adjacent carbon brush. The annular nozzle is also fixedly connected to an air inlet pipe, the free end of which extends outside the generator housing. The system also includes a negative pressure assembly disposed outside the generator housing, connected to the dust collection trough to maintain a negative pressure state within it. Several flexible dust collection blocks are also embedded within the dust collection trough, all connected end-to-end to form an annular structure with the upper end protruding from the dust collection trough. The flexible dust collection blocks are made of a porous flexible material. The dust collection trough includes an annular trough body and a buffer ring located within it. The buffer ring is also connected to an inclined ring located within it, with one end of the inclined ring facing upwards and positioned directly below the slip ring. The flexible dust collection blocks are embedded within the annular trough body.

2. The generator set slip ring purging structure as described in claim 1, characterized in that, The generator casing is also equipped with a door, which is located above the dust collection trough.

3. The generator set slip ring purging structure as described in claim 1, characterized in that, The powder collection groove is located below the slip ring, and the upward projection of the inner edge of the powder collection groove is located on the lower wall surface of the slip ring.

4. The generator set slip ring purging structure as described in claim 1, characterized in that, The annular groove body is lower than the buffer ring and a number of leakage holes are opened on the bottom surface of the annular groove body; the negative pressure component includes a discharge pipe, one end of which is connected to all the leakage holes and the other end extends to the outside of the generator casing.

5. The generator set slip ring purging structure as described in any one of claims 1-4, characterized in that, The nozzle and the carbon brush are in one-to-one correspondence.

6. The generator set slip ring purging structure as described in claim 1, characterized in that, The annular nozzle is also fixedly connected to a connecting rod, which is located on both sides of the annular nozzle opposite to the air intake pipe.

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