阅读说明：本技术 一种水力发电机组的碳粉回收装置 (Carbon powder recovery device of hydroelectric generator set ) 是由 华红 张治忠 刘小兵 曾永忠 余志顺 卢加兴 于 2021-07-26 设计创作，主要内容包括：本发明提供了一种水力发电机组的碳粉回收装置,包括一对碳刷,吹粉装置,以及吸粉装置；一碳刷与一集电环滑动连接；一对碳刷靠近集电环的一侧均设有集粉槽；吹粉装置包括一对其中一侧开口的吹粉盒,以及与吹粉盒内部导通的吹风机；一对吹粉盒分别设于一对碳刷相互远离的一侧,吹粉盒的开口侧与碳刷抵接；集粉槽沿主轴的长度方向分布且贯穿碳刷；吸粉装置包括设于一对碳刷之间的吸粉盒,以及与吸粉盒内部导通的抽风机；吸粉盒靠近碳刷的相对的两侧壁均为开口侧。本发明的水力发电机组的碳粉回收装置,能够有效地收集从碳刷上掉落的碳粉,避免发电机转子绝缘性降低,产生短路等。(The invention provides a carbon powder recovery device of a hydroelectric generating set, which comprises a pair of carbon brushes, a powder blowing device and a powder sucking device, wherein the carbon brushes are arranged in a pair; a carbon brush is connected with a collecting ring in a sliding way; powder collecting grooves are formed in one sides, close to the collecting rings, of the carbon brushes; the powder blowing device comprises a pair of powder blowing boxes with openings on one side and a blower communicated with the insides of the powder blowing boxes; the pair of powder blowing boxes are respectively arranged on one sides of the pair of carbon brushes, which are far away from each other, and the opening side of the powder blowing box is abutted against the carbon brushes; the powder collecting grooves are distributed along the length direction of the main shaft and penetrate through the carbon brush; the powder suction device comprises a powder suction box arranged between the pair of carbon brushes and an exhaust fan communicated with the inside of the powder suction box; the two opposite side walls of the powder suction box close to the carbon brush are both opening sides. The carbon powder recovery device of the hydroelectric generating set can effectively collect the carbon powder falling from the carbon brush, and avoid the reduction of the insulativity of the generator rotor, the generation of short circuit and the like.)

1. The utility model provides a hydroelectric set's carbon dust recovery unit which characterized in that: comprises a pair of carbon brushes, a powder blowing device and a powder sucking device; the carbon brush is connected with a collecting ring in a sliding manner; powder collecting grooves are formed in one sides, close to the collecting rings, of the carbon brushes; the powder blowing device comprises a pair of powder blowing boxes with openings on one side and a blower communicated with the insides of the powder blowing boxes; the pair of powder blowing boxes are respectively arranged on one sides, far away from the carbon brushes, of the pair of carbon brushes, and the opening sides of the powder blowing boxes are abutted to the carbon brushes; the powder collecting grooves are distributed along the length direction of the main shaft and penetrate through the carbon brush;

the powder suction device comprises a powder suction box arranged between the pair of carbon brushes and an exhaust fan communicated with the interior of the powder suction box; the two opposite side walls of the powder suction box close to the carbon brush are both opening sides.

2. The carbon powder recovery device of the hydroelectric generating set according to claim 1, wherein: and one carbon brush is provided with a plurality of powder collecting grooves which are uniformly distributed along the direction vertical to the main shaft.

3. The carbon powder recovery device of the hydroelectric generating set according to claim 1, wherein: the two side faces of the powder suction box, which are vertical to the main shaft, are arc-shaped faces; the width of the powder suction box far away from one side of the collecting ring is smaller than that of the other side of the collecting ring.

4. The carbon powder recovery device of the hydroelectric generating set according to claim 1, wherein: also comprises a pair of supporting plates; the supporting plate is arranged on one side, away from the collecting ring, of the stacked carbon brushes; the supporting plate is connected with the carbon brush through a spring; the supporting plate is provided with a yielding hole for the conducting wire to pass through;

the support plate is fixedly arranged on the carbon brush holder; the carbon brush holder is used for supporting the carbon brush.

5. The carbon powder recovery device of the hydroelectric generating set according to claim 4, wherein: and a plurality of springs are arranged between the supporting plate and the carbon brush and are distributed along the length direction of the supporting plate.

6. The carbon powder recovery device of the hydroelectric generating set according to claim 4, wherein: a detection rod is fixedly arranged on one side of the carbon brush, which is close to the powder blowing box; a pair of oppositely arranged pressure sensors is arranged on the side wall of the supporting plate; one end, far away from the carbon brush, of the detection rod is arranged between the pair of pressure sensors.

7. The carbon powder recovery device of the hydroelectric generating set according to claim 1, wherein: the powder blowing box is made of high-temperature-resistant insulating ceramic materials.

8. The carbon powder recovery device of the hydroelectric generating set according to claim 1, wherein: the powder absorption box is made of high-temperature-resistant insulating ceramic materials.

9. The carbon powder recovery device of the hydroelectric generating set according to claim 4, wherein: the supporting plate is made of high-temperature-resistant ceramic materials.

Technical Field

The invention relates to the technical field of generators, in particular to a carbon powder recovery device of a hydroelectric generating set.

Background

Carbon brushes (Carbon brushes), also called brushes, are widely used as sliding contacts in many electrical devices. The carbon brush mainly comprises graphite, impregnated graphite and metal (copper and silver) graphite in product application. Carbon brushes are devices that transmit power or signals between a stationary and a rotating part of an electric motor or generator or other rotating machinery. In a hydroelectric generating set, a large-scale rotor continuously rotates, the end part of a main shaft of the large-scale rotor is respectively connected with two carbon brushes in a sliding manner through two collecting rings, so that the electric conduction function is realized, due to the characteristic that the carbon brushes are not wear-resistant, the surfaces of the collecting rings are smooth in time, and the carbon brushes can also generate serious abrasion in the continuous high-speed rotation process, so that the contact surfaces of the carbon brushes and the collecting rings generate a large amount of carbon powder, if the carbon powder is not clear in time, the high-conductivity carbon powder can seriously influence the insulativity of the generator rotor, and even the risk of short circuit is caused.

In conclusion, the device capable of effectively collecting and removing the carbon powder is designed to protect the generator set to a certain extent.

Disclosure of Invention

The invention aims to provide a carbon powder recovery device of a hydroelectric generating set, which can effectively collect carbon powder falling from a carbon brush and avoid the reduction of the insulativity of a generator rotor, the generation of short circuit and the like.

The embodiment of the invention is realized by the following technical scheme: the carbon powder recovery device of the hydroelectric generating set comprises a pair of carbon brushes, a powder blowing device and a powder sucking device; the carbon brush is connected with a collecting ring in a sliding manner; powder collecting grooves are formed in one sides, close to the collecting rings, of the carbon brushes; the powder blowing device comprises a pair of powder blowing boxes with openings on one side and a blower communicated with the insides of the powder blowing boxes; the pair of powder blowing boxes are respectively arranged on one sides, far away from the carbon brushes, of the pair of carbon brushes, and the opening sides of the powder blowing boxes are abutted to the carbon brushes; the powder collecting grooves are distributed along the length direction of the main shaft and penetrate through the carbon brush; the powder suction device comprises a powder suction box arranged between the pair of carbon brushes and an exhaust fan communicated with the interior of the powder suction box; the two opposite side walls of the powder suction box close to the carbon brush are both opening sides.

Furthermore, one carbon brush is provided with a plurality of powder collecting grooves, and the plurality of powder collecting grooves are uniformly distributed in the direction perpendicular to the main shaft.

Furthermore, two side faces of the powder suction box, which are vertical to the main shaft, are arc-shaped faces; the width of the powder suction box far away from one side of the collecting ring is smaller than that of the other side of the collecting ring.

Further, the device also comprises a pair of supporting plates; the supporting plate is arranged on one side, away from the collecting ring, of the stacked carbon brushes; the supporting plate is connected with the carbon brush through a spring; the supporting plate is provided with a yielding hole for the conducting wire to pass through; the support plate is fixedly arranged on the carbon brush holder; the carbon brush holder is used for supporting the carbon brush.

Furthermore, a plurality of springs are arranged between one support plate and one carbon brush and distributed along the length direction of the support plate.

Furthermore, a detection rod is fixedly arranged on one side of the carbon brush, which is close to the powder blowing box; a pair of oppositely arranged pressure sensors is arranged on the side wall of the supporting plate; one end, far away from the carbon brush, of the detection rod is arranged between the pair of pressure sensors.

Further, the powder blowing box is made of high-temperature-resistant insulating ceramic materials.

Further, the powder absorption box is made of high-temperature-resistant insulating ceramic materials.

Further, the support plate is made of high-temperature-resistant ceramic materials.

The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects: according to the carbon powder recovery device of the hydroelectric generating set, the side edge of the carbon brush, which is contacted with the collecting ring, is provided with the powder collecting groove, so that the heat dissipation of the carbon brush can be effectively promoted, carbon powder falling from the carbon brush can enter the powder collecting groove, the carbon powder in the powder collecting groove in the pair of carbon brushes is blown to the powder suction box in the middle of the pair of carbon brushes through the pair of powder blowing devices, and the carbon powder in the powder suction box is sucked away through the exhaust fan, so that the situations that the carbon powder is blown to other places to cause the insulation reduction of a generator rotor, even the short circuit and the like can be effectively avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a view angle of a carbon powder recovery device of a hydroelectric generating set according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a carbon powder recovery device of a hydroelectric generating set according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of the interior of a carbon powder recovery device of a hydroelectric generating set according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a carbon brush part of a carbon powder recovery device of a hydroelectric generating set according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a powder suction box of a carbon powder recovery device of a hydroelectric generating set according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a powder blowing box of a carbon powder recovery device of a hydroelectric generating set according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of the interior of a powder suction box of a carbon powder recovery device of a hydroelectric generating set according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of the interior of a powder blowing box of a carbon powder recovery device of a hydroelectric generating set according to an embodiment of the present invention.

Icon: 10-main shaft, 11-collecting ring, 20-carbon brush, 21-powder collecting groove, 22-spring, 23-supporting plate, 24-conducting wire, 25-detecting rod, 26-pressure sensor, 31-powder blowing box, 32-air pipe and 33-powder sucking box.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of this application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

As shown in fig. 1 to 8, the carbon powder recycling device of the hydroelectric generating set in the embodiment includes a pair of carbon brushes 20, a powder blowing device, and a powder sucking device; a carbon brush 20 is connected with a collecting ring 11 in a sliding way; one side of each carbon brush 20 close to the collecting ring 11 is provided with a powder collecting groove 21; the powder blowing device comprises a pair of powder blowing boxes 31 with one side opened and a blower communicated with the interior of the powder blowing boxes 31; the pair of powder blowing boxes 31 are respectively arranged at one sides of the pair of carbon brushes 20, which are far away from each other, and the opening sides of the powder blowing boxes 31 are abutted to the carbon brushes 20; the powder collecting grooves 21 are distributed along the length direction of the main shaft 10 and penetrate through the carbon brush 20; the powder suction device comprises a powder suction box 33 arranged between the pair of carbon brushes 20 and an exhaust fan communicated with the interior of the powder suction box 33; opposite side walls of the dust suction box 33 near the carbon brush 20 are both open sides. Specifically, the powder collecting groove 21 is formed in the side edge, in contact with the collecting ring 11, of the carbon brush 20, heat dissipation of the carbon brush 20 can be effectively promoted, carbon powder falling from the carbon brush 20 can enter the powder collecting groove 21, then the carbon powder in the powder collecting groove 21 of the pair of carbon brushes 20 is blown to the powder sucking box 33 in the middle of the pair of carbon brushes 20 through the pair of powder blowing devices, and the carbon powder in the powder sucking box 33 is sucked away through the exhaust fan, so that the situation that the carbon powder is blown to other places, the insulativity of a generator rotor is reduced, even short circuit and the like can be effectively avoided. Wherein the air outlet of the blower is communicated with the interior of the blower box through the air pipe 32.

A carbon brush 20 in the embodiment is provided with a plurality of powder collecting grooves 21, and the plurality of powder collecting grooves 21 are uniformly distributed in a direction perpendicular to the main shaft 10. Specifically, the plurality of powder collecting grooves 21 not only can remarkably improve the heat dissipation efficiency, but also can sufficiently enable carbon powder to enter the powder collecting grooves 21.

The two side surfaces of the powder absorbing box 33 in the embodiment, which are vertical to the main shaft 10, are arc-shaped surfaces; the width of the compact 33 away from the slip ring 11 is smaller on one side than on the other side. Specifically, as shown in fig. 5 and 7, the arc-shaped and horn-like powder suction box 33 can sufficiently suck the carbon powder out of the powder suction box 33, so as to prevent the carbon powder from staying at a corner of the powder suction box 33 and being incapable of being sufficiently sucked away.

In an embodiment, a pair of support plates 23; a supporting plate 23 is arranged on one side of a stacked carbon brush 20 far away from the collecting ring 11; the support plate 23 is connected with the carbon brush 20 through the spring 22; the supporting plate 23 is provided with a yielding hole for the conducting wire 24 to pass through; the support plate 23 is fixedly arranged on the carbon brush 20 frame; the carbon brush 20 holder supports the carbon brush 20. A plurality of springs 22 are disposed between a support plate 23 and a carbon brush 20, and the plurality of springs 22 are distributed along the length direction of the support plate 23. Specifically, the carbon brush 20 holder is used to support the carbon brush 20 and facilitate subsequent replacement of the carbon brush 20. The carbon brush 20 is connected with the supporting plate 23 through the spring 22, so that the spring 22 can sufficiently attach the carbon brush 20 to the collecting ring 11, the carbon brush 20 is in closer contact with the collecting ring 11, and the conductive effect is better. In addition, when the carbon brush 20 is unevenly worn, part of the carbon brush 20 is in contact with the collecting ring 11 at the moment, and part of the carbon brush is in poor contact due to abrasion, so that the fire risk is increased at the moment, the carbon brush 20 is simultaneously extruded at different parts by using the plurality of springs 22, even if the carbon brush 20 is partially worn due to uneven stress, the worn part can be fully attached to the collecting ring 11 under the extrusion of the springs 22, the size of a gap between the carbon brush 20 and the collecting ring 11 is reduced, and carbon powder is prevented from falling from the gap and floating to other places of the generator rotor.

In the embodiment, a detection rod 25 is fixedly arranged on one side of the carbon brush 20 close to the powder blowing box 31; a pair of oppositely arranged pressure sensors 26 are arranged on the side wall of the supporting plate 23; an end of the detection rod 25 remote from the carbon brush 20 is provided between a pair of pressure sensors 26. Specifically, when the carbon brush 20 takes place partial wear, at this moment the carbon brush 20 can produce certain displacement gradually under the effect of spring 22, just can drive detection stick 25 and remove this moment, make detection stick 25 keep away from the one end of carbon brush 20 and produce bigger displacement, and the one end that detection stick 25 kept away from carbon brush 20 is in between a pair of pressure sensor 26, detection stick 25 will extrude one of them side pressure sensor 26 this moment, and the displacement degree is different, pressure sensor 26's signal is also different, consequently can learn the wearing and tearing condition and the degree of wear of carbon brush 20 this moment through cell-phone pressure sensor 26's signal.

The powder blowing box 31 in the embodiment is made of a high temperature resistant insulating ceramic material. The powder absorbing box 33 is made of high-temperature-resistant insulating ceramic material. The support plate 23 is made of a high temperature resistant ceramic material. Specifically, since the blow box 31, the suction box 33, and the support plate 23 are directly or indirectly in contact with the carbon brush 20, the use of the high-temperature-resistant insulating ceramic material can significantly improve safety and durability in use.

In summary, in the carbon powder recovery device of the hydroelectric generating set of the embodiment, the powder collecting groove 21 is formed in the side edge of the carbon brush 20 contacting the collecting ring 11, so that heat dissipation of the carbon brush 20 can be effectively promoted, carbon powder falling from the carbon brush 20 can enter the powder collecting groove 21, then the carbon powder in the powder collecting groove 21 of the pair of carbon brushes 20 is blown to the powder suction box 33 in the middle of the pair of carbon brushes 20 through the pair of powder blowing devices, and then the carbon powder in the powder suction box 33 is sucked away through the exhaust fan, so that the condition that the insulation of the generator rotor is reduced and even short circuit is caused due to the fact that the carbon powder is blown to other places can be effectively avoided.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.