Online polishing tool for collecting ring of hydraulic generator

Abstract

The utility model discloses an online polishing tool for a collecting ring of a hydro-generator, and belongs to the technical field of electric power system maintenance. The online polishing tool for the collecting ring of the hydro-generator comprises a brush box and further comprises a base, the base is located below the brush box, a limiting groove is formed in the base, and a limiting block is arranged at one end of the base. In order to solve the problems that time and labor are wasted when a collecting ring is dismounted from equipment, manual grinding efficiency is low after dismounting, and personnel are prone to being injured by electric shock, a plurality of brush bases are arranged on the side face of the excitation collecting ring, a base is inserted into the single brush base during grinding, and the position of the base is fixed through an operating rod; at the moment, the grinding bodies in the brush boxes on the base grind the excitation slip ring, the brush bases and the base can be separated by rotating the operating rod after grinding operation is finished, the base is sequentially inserted into the multiple brush bases, and therefore the excitation slip ring can be ground in multiple different directions, and the grinding effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of power system overhauling, in particular to a water turbine generator ring online polishing tool. BACKGROUND

[0002] In the power system, the generator ring system is affected by factors such as foreign matter entering, carbon brush quality, generator long-time shutdown ring system damp, temperature change, uneven wear, carbon deposition, electric arc, etc. during use. The excitation slip ring surface may have burrs, sharp corners, flash, pits, rust marks and other uneven abnormal conditions. The smoothness of the excitation slip ring surface does not meet the safety operation requirements. After cleaning the generator ring system, the generator may still have a serious sparking phenomenon during operation, which may cause the generator excitation slip ring and carbon brush to overheat, affecting the safe operation of the unit. The ring sparking phenomenon can only be completely solved after grinding.

[0003] The existing ring grinding method mainly has three types: 1. The ring system is removed from the device, the excitation slip ring is transported to a professional processing plant for turning and polishing; 2. The ring system is removed from the device, the excitation slip ring is hoisted to the maintenance station and manually ground with sand, oilstone or an angle grinder; 3. When the generator is running, the excitation slip ring is manually wiped with a cotton cloth under rotation.

[0004] However, the first and second methods require the removal of a large number of adjacent components before the ring system can be removed and transported to the processing plant, which is time-consuming and labor-intensive. During the process of disassembly, assembly and hoisting of the ring system, the excitation slip ring surface may be damaged, affecting the equivalent available coefficient of the generator. At the same time, disassembling and assembling the ring system is time-consuming and labor-intensive, and the manual grinding smoothness is not high, the efficiency is low, and the risk of damaging the ring surface with electric tools during the grinding process is high. The third method can only clean the local ring surface contamination and surface rust due to space limitations, and the treatment effect is not ideal. At the same time, the maintenance personnel are close to the rotating live equipment, which may cause mechanical injury and electric shock injury, and the risk of personal injury is extremely high. The ring grinding from the device is time-consuming and labor-intensive, the manual polishing efficiency is low, and the personnel are prone to electric shock injury. Therefore, it does not meet the existing needs, and a water turbine generator ring online polishing tool is proposed. UTILITY MODEL CONTENTS

[0005] The utility model discloses a water -turbine generator collecting ring on -line polishing frock, through setting up a plurality of brush holder at the side of excitation collecting ring, the base is inserted into the inside of single brush holder when grinding, and the position of base is fixed through operating lever, the grinding body in the inside of brush box on the base is ground excitation slip ring at this moment, and the brush holder and base can be separated after rotating operating lever after grinding operation ends, and the base is inserted into the inside of a plurality of brush holder in turn, so that the excitation slip ring is ground in a plurality of different directions, improve the grinding effect, can solve the problem in prior art.

[0006] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a water -turbine generator collecting ring on -line polishing frock, including brush box, still including base, the base is located below brush box, the inside of base is provided with limit groove, one end of base is provided with limit block, the inside of limit groove is provided with brake lever, the inside of limit block is provided with sleeve, the outside of limit block is provided with brush holder, the inside of sleeve is provided with operating lever, the inside of brush box is provided with grinding body, the top of brush box is provided with socket, the inside of socket is provided with plugboard, the lower surface of plugboard is provided with constant force spring, the top of plugboard is provided with fixed pin.

[0007] Preferably, the grinding body is of oil stone material, the side of the grinding body is provided with a fastening sleeve, the fastening sleeve is formed by winding and fixing an insulating sheet on the side of the grinding body through insulating tape, the front end of the grinding body is in contact with the polishing surface, the rear end of the grinding body is in contact with the circumferential surface of the constant force spring, the constant force spring and the fixed pin are connected with the plugboard, and the fixed pin extends to the outside of the socket.

[0008] Preferably, the brake lever comprises a combination plate and a pressing plate, the combination plate is connected with the base shaft, the combination plate is connected with the pressing plate, one end of the combination plate is provided with a first brake protrusion, the lower surface of the pressing plate is provided with a second brake protrusion, the upper surface of the pressing plate is provided with a spring, the inside of the spring is provided with a positioning block, the positioning block is connected with the pressing plate, the side of the sleeve is provided with a through groove, and the second brake protrusion is located in the inside of the through groove.

[0009] Preferably, the operating lever comprises a short shaft and a long shaft, the junction of the short shaft and the long shaft is provided with a cam, the cam is of an elliptical structure, the short shaft, the long shaft and the cam are located in the inside of the sleeve, the long shaft is connected with the sleeve bearing, and the cam is located directly below the through groove.

[0010] Preferably, one end of the short shaft is provided with a locking pin, the middle part of the long shaft is provided with a baffle, one end of the long shaft is provided with a handle, the brush holder is of a hollow cuboid structure with the upper end and the rear end in an open state, the front end surface of the brush holder is provided with a locking hole and a long slot, and the short shaft and the locking pin extend to the outside of the brush holder from the inside of the brush holder through the locking hole and the long slot respectively.

[0011] Preferably, the brush holder is mounted on the excitation slip ring by bolts, the inside of the excitation slip ring is provided with an excitation slip ring, the inside of the excitation slip ring is provided with a generator main shaft, a plurality of brush holders are annularly distributed on the excitation slip ring with the generator main shaft as the center, and the circumferential surface of the excitation slip ring is a polishing surface.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1、 the utility model discloses a plurality of brush holders are set up on the side of the excitation slip ring, the inside of the excitation slip ring is provided with an excitation slip ring, when polishing, personnel inserts the base into the inside of single brush holder, at this time, the long half shaft end of the cam is in the vertical direction, the grinding body is locked by the first brake lug, the locking pin is in the horizontal direction, personnel rotates the operating lever to the locking pin in the vertical direction, so that the position of the base is fixed, at this time, the long half shaft end of the cam is in the horizontal direction, the grinding body is unlocked, one end of the constant force spring abuts against the grinding body, the other end of the grinding body polishes the excitation slip ring, after the polishing work is finished, the operating lever is rotated to the locking pin in the horizontal direction, the brush holder and the base can be separated, personnel inserts the base into the inside of a plurality of brush holders in turn, thereby realizing the grinding of the excitation slip ring in a plurality of different directions, and the grinding effect is improved.

[0014] 2、 the utility model discloses a plurality of brush holders are annularly distributed on the side of the excitation slip ring, after the base is inserted into the inside of single brush holder, the short shaft and the locking pin extend to the outside of the brush holder from the locking hole and the long slot in the inside of the brush holder respectively, at this time, the locking pin is in the horizontal state and is located at one end of the brush holder, the baffle is located at the other end of the brush holder, personnel rotates the operating lever to the locking pin in the vertical state, so that the position of the operating lever is fixed, and then the base is fixed in the inside of the brush holder, meanwhile, the grinding body automatically polishes the excitation slip ring, compared with the mode that personnel stands on one side of the excitation slip ring for a long time and uses cotton cloth to lightly touch and wipe the excitation slip ring, the possibility that personnel is electrically injured is reduced, and personal safety is guaranteed. ACCURACY OF DRAWINGS

[0015] Figure 1 It is the overall front view of the utility model;

[0016] Figure 2 It is the brush box partial structure schematic view of the utility model;

[0017] Figure 3 It is the base partial structure schematic view of the utility model;

[0018] Figure 4 It is the brake lever partial structure schematic view of the utility model;

[0019] Figure 5 It is the operating lever partial structure schematic view of the utility model;

[0020] Figure 6The partial structure diagram of the brush holder of the utility model shows that

[0021] Figure 7 The schematic diagram of the grinding body polishing the excitation slip ring of the utility model shows that

[0022] In the figure: 1, brush box; 101, socket; 102, plugboard; 103, constant force spring; 104, fixed pin; 2, grinding body; 201, fastening sleeve; 3, base; 301, limiting block; 302, limiting groove; 4, brake lever; 401, first brake lug; 402, combination plate; 403, pressing plate; 404, spring; 405, second brake lug; 5, brush holder; 501, locking hole; 502, long slot; 503, bolt; 6, operating lever; 601, short shaft; 6011, locking pin; 602, cam; 603, long shaft; 604, baffle; 605, handle; 7, sleeve; 701, through groove; 8, excitation slip ring; 801, generator main shaft; 802, polishing surface; 803, excitation slip ring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] In order to solve the problems that it is time-consuming and laborious to remove the slip ring from the equipment during the grinding of the slip ring, the efficiency of manual polishing is low after removal, and personnel are easily injured by electric shock, please refer to Figures 1-7 The utility model provides an embodiment: a water turbine generator slip ring on-line polishing tool, including brush box 1, still including base 3, base 3 is located below brush box 1, the inside of base 3 is provided with limiting groove 302, one end of base 3 is provided with limiting block 301, the inside of limiting groove 302 is provided with brake lever 4, the inside of limiting block 301 is provided with sleeve 7, the outside of limiting block 301 is provided with brush holder 5, the inside of sleeve 7 is provided with operating lever 6, the inside of brush box 1 is provided with grinding body 2, the top of brush box 1 is provided with socket 101, the inside of socket 101 is provided with plugboard 102, the bottom of plugboard 102 is provided with constant force spring 103, the top of plugboard 102 is provided with fixed pin 104.

[0025] The grinding body 2 is made of oil stone, the side surface of the grinding body 2 is provided with a fastening sleeve 201, the front end of the grinding body 2 is in contact with the polishing surface 802, the rear end of the grinding body 2 is in contact with the circumferential surface of the constant force spring 103, the constant force spring 103 and the fixed pin 104 are connected with the plug plate 102, and the fixed pin 104 extends to the outside of the socket 101.

[0026] Specifically, the grinding body 2 is cut from a whole oil stone, the length of the grinding body 2 is 6 cm, the coarse sand surface of the oil stone is selected to be 1000 meshes or more, and the fine sand surface of the oil stone is selected to be 3000 meshes or more. In order to prevent the grinding body 2 from shaking during online grinding due to the smooth surface of the grinding body 2 and the deviation of the internal size of the brush box 1, an insulating sheet is installed on the surface of the grinding body 2, and the insulating sheet is fixed on the surface of the grinding body 2 by winding with insulating tape to form the fastening sleeve 201, so that a certain friction force is generated between the grinding body 2 and the inside of the brush box 1, and the stability of the grinding body 2 during polishing work is improved.

[0027] The operating rod 6 includes a short shaft 601 and a long shaft 603, a cam 602 is arranged at the connection position of the short shaft 601 and the long shaft 603, the cam 602 is in an elliptical structure, the short shaft 601, the long shaft 603 and the cam 602 are located inside the sleeve 7, the long shaft 603 is in bearing connection with the sleeve 7, the cam 602 is located directly below the through slot 701, one end of the short shaft 601 is provided with a locking pin 6011, the middle part of the long shaft 603 is provided with a baffle 604, one end of the long shaft 603 is provided with a handle 605, the brake lever 4 includes a combination plate 402 and a pressing plate 403, the combination plate 402 is in shaft connection with the base 3, the combination plate 402 is connected with the pressing plate 403, one end of the combination plate 402 is provided with a first brake protrusion 401, the lower surface of the pressing plate 403 is provided with a second brake protrusion 405, the upper surface of the pressing plate 403 is provided with a spring 404, the inside of the spring 404 is provided with a positioning block, the positioning block is connected with the pressing plate 403, the side surface of the sleeve 7 is provided with a through slot 701, and the second brake protrusion 405 is located inside the through slot 701.

[0028] Specifically, when the long half shaft end of the cam 602 is in a vertical direction, the second brake protrusion 405 is lifted by the cam, the spring 404 is contracted, the first brake protrusion 401 is separated from the grinding body 2, and the grinding body 2 performs polishing work on the excitation slip ring 8. When the long half shaft end of the cam 602 is in a horizontal direction, the spring 404 expands to press the first brake protrusion 401 into the inside of the through slot 701, at this time, the first brake protrusion 401 is in contact with the grinding body 2, and the grinding body 2 is locked by the first brake protrusion 401.

[0029] The brush holder 5 is a hollow cuboid structure with open upper end and rear end, and the front end face of the brush holder 5 is provided with a locking hole 501 and a long hole 502, and the short shaft 601 and the locking pin 6011 extend to the outside of the brush holder 5 from the inside of the brush holder 5 through the locking hole 501 and the long hole 502 respectively, and the brush holder 5 is installed on the excitation slip ring 803 through a bolt 503, the inside of the excitation slip ring 803 is provided with an excitation slip ring 8, the inside of the excitation slip ring 8 is provided with a generator main shaft 801, and a plurality of brush holders 5 are distributed in a ring shape around the generator main shaft 801 on the excitation slip ring 803, and the circumferential surface of the excitation slip ring 8 is a polishing surface 802.

[0030] Specifically, the axis of the abrasive body 2 is perpendicular to the tangent of the outer ring surface of the excitation slip ring 8, the brush box 1 is 2-3mm away from the excitation slip ring 8, the abrasive body 2 is unlocked, the constant force spring 103 continuously provides a pressure of 15N-25N to the abrasive body 2, and the abrasive body 2 continuously contacts the polishing surface 802 of the excitation slip ring 8 under the pressure of the constant force spring 103, thereby further improving the polishing effect.

[0031] When polishing is performed, the person inserts the base 3 into the inside of a single brush holder 5, at this time the long half shaft end of the cam 602 is in the vertical direction, the abrasive body 2 is locked by the first brake lug 401, and the locking pin 6011 is in the horizontal direction, the person rotates the operating rod 6 to make the locking pin 6011 in the vertical direction, so that the position of the base 3 is fixed, at this time the long half shaft end of the cam 602 is in the horizontal direction, the abrasive body 2 is unlocked, the constant force spring 103 abuts against one end of the abrasive body 2, and the other end of the abrasive body 2 polishes the excitation slip ring 8, after the polishing work is completed, the operating rod 6 is rotated to make the locking pin 6011 in the horizontal direction, so that the brush holder 5 and the base 3 can be separated, and the person inserts the base 3 into the inside of a plurality of brush holders 5 in turn, thereby realizing polishing of the excitation slip ring 8 in multiple different directions, improving the polishing effect, and further improving the polishing efficiency.

[0032] In order to ensure that the excitation slip ring 8 achieves uniform and smooth polishing effect, the brush holder 5 needs to be installed at multiple points for polishing, and the polishing time of each point needs to be controlled within one minute, and the polishing is performed in the mode of removing one carbon brush holder and polishing one point, after one point is completed, the original carbon brush holder is reinstalled, and the next point is polished, after the polishing is completed, the polishing effect is observed, and it is checked that there is no sparking phenomenon between the excitation slip ring 8 and the carbon brush, which indicates that the polishing effect has been achieved, and the polishing can be stopped.

[0033] After the base 3 is inserted into the interior of the single brush holder 5, the short shaft 601 and the locking pin 6011 extend to the outside of the brush holder 5 from the locking hole 501 and the long slot 502 of the brush holder 5 respectively, at this time, the locking pin 6011 is in a horizontal state at one end of the brush holder 5, and the baffle 604 is at the other end of the brush holder 5, the personnel rotates the operating rod 6 until the locking pin 6011 is in a vertical state, so as to fix the position of the operating rod 6, and then fix the base 3 in the brush holder 5, at the same time, the abrasive body 2 automatically grinds the excitation slip ring 8, compared with the way that the personnel stands on one side of the excitation slip ring 803 for a long time and uses cotton cloth to lightly touch and wipe the excitation slip ring 8, the possibility of electric shock injury of the personnel is reduced, and the personal safety is further ensured.

[0034] Working principle: a plurality of brush holders 5 are arranged on the side of the excitation slip ring 803, the base 3 is inserted into the interior of the single brush holder 5 during grinding, and the position of the base 3 is fixed through the operating rod 6, at this time, the abrasive body 2 in the brush box 1 on the base 3 grinds the excitation slip ring 8, and the brush holder 5 and the base 3 can be separated by rotating the operating rod 6 after the grinding work is completed, and the base 3 is inserted into the interior of the plurality of brush holders 5 in turn, so that the excitation slip ring 8 is grinded in different directions, and the grinding effect is improved.

[0035] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying that there is any such actual relationship or order between these entities or actions. Moreover, the terms "comprises", "comprising" or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or apparatus including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or apparatus.

[0036] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model.

Claims

1. A water turbine generator ring collector on-line polishing tool, comprising a brush box (1), characterized in that; Also include the base (3), the base (3) is located below the brush box (1), the inside of the base (3) is provided with a limiting groove (302), one end of the base (3) is provided with a limiting block (301), the inside of the limiting groove (302) is provided with a brake lever (4), the inside of the limiting block (301) is provided with a sleeve (7), the outside of the limiting block (301) is provided with a brush holder (5), the inside of the sleeve (7) is provided with an operating lever (6), the inside of the brush box (1) is provided with an abrasive body (2), the upper surface of the brush box (1) is provided with a socket (101), the inside of the socket (101) is provided with an insertion plate (102), the lower surface of the insertion plate (102) is provided with a constant force spring (103), the upper surface of the insertion plate (102) is provided with a fixed pin (104).

2. The online polishing tooling for the hydroelectric generator slip ring according to claim 1, characterized in that: The abrasive body (2) is an oil stone material, the side of the abrasive body (2) is provided with a fastening sleeve (201), the fastening sleeve (201) is formed by winding and fixing an insulating sheet on the side of the abrasive body (2) through insulating tape, the front end of the abrasive body (2) is in contact with the polishing surface (802), the rear end of the abrasive body (2) is in contact with the circumferential surface of the constant force spring (103), the constant force spring (103) and the fixed pin (104) are connected with the insertion plate (102), and the fixed pin (104) extends to the outside of the socket (101).

3. The online polishing tooling for a hydroelectric generator slip ring of claim 1, wherein: The brake lever (4) includes a combination plate (402) and a pressing plate (403), the combination plate (402) is connected with the base (3) through a shaft, the combination plate (402) is connected with the pressing plate (403), one end of the combination plate (402) is provided with a first brake protrusion (401), the lower surface of the pressing plate (403) is provided with a second brake protrusion (405), the upper surface of the pressing plate (403) is provided with a spring (404), the inside of the spring (404) is provided with a positioning block, and the positioning block is connected with the pressing plate (403), the side of the sleeve (7) is provided with a through groove (701), and the second brake protrusion (405) is located in the inside of the through groove (701).

4. The online polishing tooling for a hydroelectric generator slip ring of claim 1, wherein: The operating lever (6) includes a short shaft (601) and a long shaft (603), a cam (602) is arranged at the connection position of the short shaft (601) and the long shaft (603), the cam (602) is in an elliptical structure, the short shaft (601), the long shaft (603) and the cam (602) are located in the inside of the sleeve (7), the long shaft (603) is connected with the sleeve (7) through a bearing, and the cam (602) is located directly below the through groove (701).

5. The online polishing tooling for a hydroelectric generator slip ring of claim 4, wherein: One end of the short shaft (601) is provided with a locking pin (6011), the middle of the long shaft (603) is provided with a baffle (604), one end of the long shaft (603) is provided with a handle (605), the brush holder (5) is in a hollow cuboid structure with the upper end and the rear end being in an open state, the front end surface of the brush holder (5) is provided with a locking hole (501) and an elongated hole (502), and the short shaft (601) and the locking pin (6011) extend to the outside of the brush holder (5) through the locking hole (501) and the elongated hole (502) respectively.

6. The online polishing tooling for a hydroelectric generator slip ring of claim 5, wherein: The brush holder (5) is installed on the excitation slip ring (803) through a bolt (503), the inside of the excitation slip ring (803) is provided with an excitation slip ring (8), the inside of the excitation slip ring (8) is provided with a generator main shaft (801), and a plurality of brush holders (5) are distributed in a ring shape around the generator main shaft (801) on the excitation slip ring (803), and the circumferential surface of the excitation slip ring (8) is a polishing surface (802).

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