Carbon powder recovery device of hydroelectric generating set

Abstract

The utility model provides a carbon powder recovery device of a hydroelectric generating set, which relates to the technical field of hydroelectric generation and comprises a rotating shaft and two mounting blocks, spring rods are arranged on the surfaces of the two mounting blocks, and carbon brushes are fixedly mounted at one ends of moving rods of the two spring rods. According to the utility model, a worker opens the exhaust fan, so that air flow enters the powder collecting groove of the carbon brush from the outside, the flowing air flow brings carbon powder into the protection cavity, then the carbon powder enters the exhaust pipe through the air transmission hole, finally enters the exhaust fan and is discharged into the recovery container through the discharge pipe of the exhaust fan, and thus the carbon powder is rapidly recovered. And under the shielding action of the protection cavity and the connecting column, the carbon powder does not fly everywhere in the process of being sucked into the exhaust fan, so that the abrasion of the collecting ring is delayed, the service life of the collecting ring is prolonged, the flying carbon powder is prevented from being accumulated on other parts of the generator set, and the normal operation and maintenance of equipment are prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydropower generation, and particularly relates to a carbon powder recovery device for a hydraulic generator set. Background Technique

[0002] The carbon powder of a hydraulic generator set is a powdery substance generated during the operation of the hydraulic generator set due to the friction between the carbon brush and the slip ring. If these carbon powders are not cleaned in time, they may affect the normal operation of the generator set, such as reducing the power generation efficiency and increasing the wear of the unit. Therefore, a carbon powder collection device is usually equipped on the hydraulic generator set to regularly clean the carbon powder and maintain the normal operation of the generator set. For example, a carbon powder recovery device for a hydraulic generator set proposed in the publication number "CN113649389B" includes a pair of carbon brushes, a powder blowing device, and a powder suction device; one carbon brush is slidably connected to a slip ring; powder collecting grooves are provided on one side of each of the pair of carbon brushes close to the slip ring; the powder blowing device includes a pair of powder blowing boxes with one side open and a hair dryer communicated with the inside of the powder blowing box; the pair of powder blowing boxes are respectively arranged on the sides of the pair of carbon brushes away from each other, and the open side of the powder blowing box abuts against the carbon brush; the powder collecting grooves are distributed along the length direction of the main shaft and penetrate through the carbon brushes; the powder suction device includes a powder suction box arranged between the pair of carbon brushes and a suction fan communicated with the inside of the powder suction box; the opposite side walls of the powder suction box close to the carbon brushes are both open sides. The carbon powder recovery device of the hydraulic generator set of the present invention can effectively collect the carbon powder falling from the carbon brush, avoid the reduction of the insulation of the generator rotor and the occurrence of short circuits, etc.;

[0003] However, in the above technical solution, during the process of the hair dryer blowing the carbon powder in the powder collecting groove and the powder suction device sucking and recovering the carbon powder, the carbon powder may be blown from one slip ring to another slip ring during the process of being sucked into the suction fan, resulting in the carbon powder flying between the two slip rings, which easily accelerates the wear of the slip rings, reduces the service life of the slip rings, and the flying carbon powder may accumulate on other parts of the generator set, affecting the normal operation and maintenance of the equipment. Content of the Utility Model

[0004] The main purpose of the present utility model is to provide a carbon powder recovery device for a hydraulic generator set, which can effectively solve the problem that in the carbon powder recovery device in the background technique, during the process of the hair dryer blowing the carbon powder in the powder collecting groove and the powder suction device sucking and recovering the carbon powder, the carbon powder may be blown from one slip ring to another slip ring during the process of being sucked into the suction fan, resulting in the carbon powder flying between the two slip rings, which easily accelerates the wear of the slip rings, reduces the service life of the slip rings, and the flying carbon powder may accumulate on other parts of the generator set, affecting the normal operation and maintenance of the equipment.

[0005] To achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0006] A carbon powder recovery device for a hydraulic generator set, comprising a rotating shaft and two mounting blocks. Spring rods are arranged on the surfaces of the two mounting blocks, and carbon brushes are fixedly mounted at one ends of the moving rods of the two spring rods.

[0007] Two slip rings are sleeved on the shaft body of the rotating shaft.

[0008] A suction fan is fixedly mounted on the common opposite side of the two mounting blocks. A suction duct is fixedly mounted on the side of the suction fan close to the slip ring. One end of the suction duct is fixedly mounted with a connecting column, and the connecting column is sleeved on the shaft body of the rotating shaft. Two protection cavities are opened inside the connecting column, and avoiding grooves are penetrated through the inner wall surface of the protection cavity. The two carbon brushes are respectively arranged inside the corresponding avoiding grooves.

[0009] An air outlet hole is opened on the column body of the connecting column, and the air outlet hole is communicated with the inner cavity of the suction duct. Two air inlet holes are penetrated through the inner wall surface of the air outlet hole, and the two air inlet holes are respectively communicated with the corresponding protection cavities.

[0010] Preferably, an annular cavity is penetrated through the inner wall of the air outlet hole, and a plurality of through holes are penetrated through both side surfaces of the inner wall of the annular cavity.

[0011] Preferably, annular plates are fixedly mounted on the inner walls of the two protection cavities, and the inner wall surfaces of the two annular plates are inclined.

[0012] Preferably, two connecting frames are fixedly mounted on the column body of the connecting column. Sealing grooves are opened on one side of the two connecting frames, and sealing covers are slidably arranged in the two sealing grooves. The two sealing covers are respectively fixedly mounted on the rod bodies of the moving rods of the corresponding spring rods.

[0013] Preferably, air vent grooves are penetrated through one side surface of the inner walls of the two sealing covers.

[0014] Preferably, filter nets are fixedly mounted in the two air vent grooves.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] (1) By opening the suction fan, the staff enables the air flow to enter the powder collecting groove of the carbon brush from the outside, so that the flowing air flow brings the carbon powder into the protection cavity, then enters the suction duct through the air outlet hole, and finally enters the suction fan and is discharged into the recovery container through the discharge pipe of the suction fan, thereby quickly recovering the carbon powder. Moreover, under the shielding effect of the protection cavity and the connecting column, the carbon powder will not fly around during the process of being sucked into the suction fan, delaying the wear of the slip ring, prolonging the service life of the slip ring, and preventing the flying carbon powder from accumulating on other parts of the generator set, thus preventing the normal operation and maintenance of the equipment from being affected. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of a carbon powder recovery device for a hydraulic generator set of the present utility model;

[0018] Figure 2 It is a schematic top view structure diagram of a carbon powder recovery device for a hydraulic generator set of the present utility model;

[0019] Figure 3 It is for a carbon powder recovery device of a hydraulic generator set of the present utility model Figure 2 Schematic cross-sectional structure diagram at A-A;

[0020] Figure 4 It is for a carbon powder recovery device of a hydraulic generator set of the present utility model Figure 3 Enlarged schematic diagram of the structure at A;

[0021] In the figure: 1, rotating shaft; 2, mounting block; 3, spring rod; 4, carbon brush; 5, slip ring; 6, exhaust fan; 7, exhaust duct; 8, connecting column; 9, protection cavity; 10, avoidance groove; 11, air delivery hole; 12, air inlet hole; 13, annular cavity; 14, through hole; 15, annular plate; 16, connecting frame; 17, sealing groove; 18, sealing cover; 19, ventilation groove; 20, filter screen. Detailed Description of the Preferred Embodiment

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] As Figures 1 - 4 shown, a carbon powder recovery device for a hydraulic generator set includes a rotating shaft 1 and two mounting blocks 2. Spring rods 3 are arranged on the surfaces of the two mounting blocks 2, and carbon brushes 4 are fixedly installed at one ends of the moving rods of the two spring rods 3;

[0024] Two slip rings 5 are sleeved on the shaft body of the rotating shaft 1;

[0025] A common exhaust fan 6 is fixedly installed on the opposite sides of the two mounting blocks 2. An exhaust duct 7 is fixedly installed on the side of the exhaust fan 6 close to the slip ring 5. One end of the exhaust duct 7 is fixedly installed with a connecting column 8. The connecting column 8 is sleeved on the shaft body of the rotating shaft 1. Two protection cavities 9 are opened inside the connecting column 8. Avoidance grooves 10 are penetrated on the inner wall surfaces of the protection cavities 9, and the two carbon brushes 4 are respectively arranged inside the corresponding avoidance grooves 10;

[0026] The connecting column 8 has an air delivery hole 11 formed in its column body. The air delivery hole 11 is communicated with the inner cavity of the air extraction pipe 7. Two air inlet holes 12 are formed through the inner wall surface of the air delivery hole 11, and the two air inlet holes 12 are respectively communicated with the corresponding protection cavities 9.

[0027] The staff member turns on the exhaust fan 6, so that the air flow enters the powder collecting groove of the carbon brush 4 from the outside. The flowing air flow brings the carbon powder into the protection cavity 9, then enters the air extraction pipe 7 through the air delivery hole 11, and finally enters the exhaust fan 6 and is discharged into the recovery container through the discharge pipe of the exhaust fan 6, thereby quickly recovering the carbon powder. Moreover, under the shielding effect of the protection cavity 9 and the connecting column 8, the carbon powder will not fly around during the process of being sucked into the exhaust fan 6, delaying the wear of the slip ring 5, extending the service life of the slip ring 5, and preventing the flying carbon powder from accumulating on other parts of the generator set, preventing it from affecting the normal operation and maintenance of the equipment.

[0028] In another embodiment of the present invention, an annular cavity 13 is formed through the inner wall of the air delivery hole 11, and a plurality of through holes 14 are formed through both side surfaces of the inner wall of the annular cavity 13.

[0029] By providing the annular cavity 13 and the through holes 14, the air intake space for the air flow to enter the air delivery hole 11 from the protection cavity 9 is increased, thereby increasing the air intake efficiency and recovering the carbon powder more quickly.

[0030] In another embodiment of the present invention, annular plates 15 are fixedly installed on the inner walls of the two protection cavities 9, and the inner wall surfaces of the two annular plates 15 are inclined.

[0031] By providing the annular plate 15 with an inclined inner wall surface, its inclined surface can guide the air flow, reducing the noise generated during air intake. And under the guiding action of the inclined surface of the annular plate 15, the carbon powder will not adhere to the inner side wall of the protection cavity 9 when it falls from the powder collecting groove into the protection cavity 9, avoiding the situation where it cannot be sucked into the exhaust fan 6.

[0032] In another embodiment of the present invention, two connecting frames 16 are fixedly installed on the column body of the connecting column 8. Sealing grooves 17 are formed on one side of the two connecting frames 16. Sealing covers 18 are slidably arranged in the two sealing grooves 17, and the two sealing covers 18 are respectively fixedly installed on the moving rod bodies of the corresponding spring rods 3.

[0033] Under the combined action of the sealing groove 17 and the connecting frame 16, it is avoided that external dust enters the protection cavity 9 through the gap between the avoidance groove 10 and the carbon brush 4, preventing it from being adsorbed on the slip ring 5 and affecting its normal operation.

[0034] In another embodiment of the present invention, ventilation grooves 19 are formed through one side surface of the inner walls of the two sealing covers 18.

[0035] A filter net 20 is fixedly installed in each of the two ventilation slots 19.

[0036] By providing the ventilation slots 19 and the filter net 20, external gas can enter normally, and the dust in the external gas can be filtered by the filter net 20.

[0037] The working principle of the carbon powder recovery device of this kind of hydraulic generator set:

[0038] During use, the staff turns on the exhaust fan 6, so that the air flow enters the powder collecting groove of the carbon brush 4 from the outside, and the flowing air flow brings the carbon powder into the protection cavity 9. Then it enters the exhaust pipe 7 through the air delivery hole 11, and finally enters the exhaust fan 6 and is discharged into the recovery container through the discharge pipe of the exhaust fan 6, so as to quickly recover the carbon powder. Moreover, under the shielding effect of the protection cavity 9 and the connecting column 8, the carbon powder will not fly around during the process of being sucked into the exhaust fan 6, delaying the wear of the slip ring 5, prolonging the service life of the slip ring 5, and preventing the flying carbon powder from accumulating on other parts of the generator set, thus preventing the normal operation and maintenance of the equipment from being affected.

[0039] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation manners here. Any obvious changes or modifications derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A carbon powder recovery device for a hydroelectric generator set, comprising a rotating shaft (1) and two mounting blocks (2), characterized in that: The surfaces of the two mounting blocks (2) are provided with spring rods (3), and one end of the moving rods of the two spring rods (3) is fixedly provided with a carbon brush (4); The shaft (1) is sleeved with two collector rings (5); An exhaust fan (6) is fixedly installed on opposite sides of the two mounting blocks (2); an exhaust pipe (7) is fixedly installed on the side of the exhaust fan (6) close to the collector ring (5); a connecting column (8) is fixedly installed on one end of the exhaust pipe (7); the connecting column (8) is sleeved on the shaft body of the rotating shaft (1); two protective cavities (9) are provided inside the connecting column (8); an avoidance groove (10) is provided through the inner wall surface of the protective cavity (9); and the two carbon brushes (4) are respectively arranged inside the corresponding avoidance grooves (10); The connecting column (8) is provided with an air delivery hole (11) on its body, the air delivery hole (11) being connected to the inner cavity of the exhaust pipe (7), and two air inlet holes (12) being provided through the inner wall surface of the air delivery hole (11), the two air inlet holes (12) being respectively connected to the corresponding protection cavity (9).

2. The carbon powder recovery device of a hydroelectric generator set according to claim 1, characterized in that: An annular cavity (13) is formed through the inner wall of the gas delivery hole (11), and a plurality of through holes (14) are formed through the surfaces on both sides of the inner wall of the annular cavity (13).

3. The carbon powder recovery device of a hydroelectric generator set according to claim 2, characterized in that: An annular plate (15) is fixedly mounted on the inner walls of the two protection chambers (9), and the inner wall surfaces of the two annular plates (15) are arranged inclined.

4. The carbon powder recovery device of a hydroelectric generating set according to claim 3, characterized in that: The connecting column (8) is fixedly mounted with two connecting frames (16), one side of the two connecting frames (16) is provided with a sealing groove (17), and sealing covers (18) are slidably arranged in the two sealing grooves (17), and the two sealing covers (18) are respectively fixedly mounted on the movable rod shaft of the corresponding spring rod (3).

5. The carbon powder recovery device of a hydroelectric generating set according to claim 4, characterized in that: A ventilation groove (19) is formed through one side surface of the inner wall of the two sealing covers (18).

6. The carbon powder recovery device of a hydroelectric generating set according to claim 5, characterized in that: Filter screens (20) are fixedly installed in the two ventilation grooves (19).

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