Single-cavity self-circulation generator braking dust removal unit assembly

Abstract

The invention discloses a brake dust removal unit assembly of a single-cavity self-circulation generator, belongs to the technical field of hydro-generators, and aims to solve the problems of an existing large-scale hydro-generator set. Comprising a brake unit and a dedusting unit. The brake unit comprises a brake telescopic cylinder, a brake seat plate is arranged at the output end of the brake telescopic cylinder, a brake block is arranged on the brake seat plate, a sealing wool top is arranged on the edge of the brake seat plate, a dust collection gap is formed between the brake block and the sealing wool top, a dust collection box is arranged on the rear side of the brake seat plate, and an inlet of the dust collection box penetrates through the sealing wool top and is communicated with the dust collection gap. The bottom of the dust collection box is connected with the interface bottom pipe; the dust removal unit comprises a sealing box body, a dust remover is arranged in the sealing box body, and the connector bottom pipe is connected with an air inlet of the sealing box body through a brake dust collection connector, a metal flame-retardant hose and an air duct pipe hoop connector in sequence. The brake unit, the buttress and the dust collector are integrated, the structural strength is high, a lengthy dust collection pipeline is avoided, and the dust collection effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of hydro-generators, and in particular relates to a single-chamber self-circulating generator braking dust removal unit assembly. Background Art

[0002] According to standards, hydroelectric generators must be equipped with a mechanical brake during design and manufacturing. During unit shutdown, when the speed drops to 30% to 40% of the rated speed, the mechanical brake kicks in, applying continuous braking until the unit comes to a complete stop. Currently, the vast majority of hydroelectric generators use mechanical braking, which relies on friction between the brake pads and the brake ring below the yoke to achieve shutdown.

[0003] The rotating parts of large hydro-turbine generators have enormous inertia. Braking generates significant mechanical stress and heat between the brake pads and the brake rings, which can easily lead to pad wear. Brake rings can also wear, deform, or even crack, compromising braking effectiveness and making replacement and maintenance difficult. Furthermore, thrust bearings can burn out due to oil film rupture at low speeds. Dust, iron filings, and oil mist generated by braking can adhere to the stator coils and core, blocking ventilation grooves, severely reducing the motor's heat dissipation capacity and damaging the insulation of the wire rods.

[0004] Therefore, equipping the mechanical brake and jacking device with a brake dust collection device is an effective measure to mitigate these defects. However, the dust collection devices of the vast majority of hydro-turbine generator sets currently in operation or even under construction are typically connected to high-power dust collection cabinets placed near the lower frame or foundation pit via lengthy pipes, which must pass through pre-buried pipelines. This design has numerous drawbacks: Pipeline hazards are difficult to identify, and leaks in the lengthy dust collection pipes are difficult to detect and repair, directly affecting dust collection effectiveness; Suction force is unevenly distributed. As generator capacity and speed increase, the number of required brakes increases, and traditional dust collection devices often handle dust collection for multiple brakes simultaneously, resulting in poor dust collection effectiveness for brakes further away from the dust collection pipes; Status monitoring is difficult, making it difficult for maintenance personnel to effectively monitor the operating status of both the brakes and the dust collection device simultaneously; The excessive space occupied by the increased number and size of dust collection cabinets squeezes the already valuable maintenance space within the hydro-turbine generator. Therefore, the development of a novel brake dust collection device structure to address these issues is urgently needed. Summary of the Invention

[0005] The purpose of the present invention is to provide a single-chamber self-circulating generator brake dust removal unit assembly to solve the problems existing in existing large-scale hydro-generator sets. The technical solutions adopted by the present invention are as follows:

[0006] A single-chamber self-circulating generator brake dust removal unit assembly includes a brake unit and a dust removal unit; the brake unit includes a brake telescopic cylinder, the output end of the brake telescopic cylinder is provided with a brake seat plate, the brake seat plate is provided with a brake block, the edge of the brake seat plate is provided with a sealing wool strip, a dust collecting gap is formed between the brake block and the sealing wool strip, the rear side of the brake seat plate is provided with a dust collecting box, the inlet of the dust collecting box passes through the sealing wool strip and is connected to the dust collecting gap, and the bottom of the dust collecting box is connected to the interface bottom pipe; the dust removal unit includes a sealed box body, a dust collector is provided in the sealed box body, and the interface bottom pipe is connected to the air inlet of the sealed box body through a brake dust suction joint, a metal flame retardant hose and an air duct pipe clamp joint in sequence.

[0007] Furthermore, the dust collector includes a shell, a drive motor and a dust suction fan are arranged in the shell, the drive motor drives the dust suction fan to rotate, the suction end of the dust suction fan is connected to the air outlet of the adsorption filter cartridge, the exhaust end of the dust suction fan extends outside the sealed box, and the air inlet of the adsorption filter cartridge is in the sealed box.

[0008] Furthermore, the inner wall of the shell is provided with sound-absorbing cotton.

[0009] Furthermore, the inner wall of the sealed box is provided with sound-absorbing cotton.

[0010] Furthermore, the sealed box body includes a top plate, a bottom plate and four vertical plates. The four vertical plates form a rectangular cylinder with upper and lower openings. The top plate and the bottom plate correspond to the upper and lower openings formed by the four vertical plates. An inspection port is provided on the vertical plate on the rear side, and an inspection door closes the inspection port.

[0011] Furthermore, the inspection door is hinged to the sealing box body by a sealing hinge, and the inspection door seals the inspection port by a sealing strip.

[0012] Furthermore, a rib plate is provided between the top plate and the vertical plate, and a rib plate is provided between the bottom plate and the vertical plate.

[0013] Furthermore, the lower plate of the brake unit is provided with a plurality of first through holes, the top plate is provided with a plurality of threaded holes, a plurality of first bolts pass through the plurality of first through holes in a one-to-one correspondence and are connected to the plurality of threaded holes in a one-to-one correspondence, and the first bolts are stopped by first single-ear stop washers;

[0014] A plurality of second through holes are opened on the bottom plate, and a plurality of second bolts pass through the plurality of second through holes in a one-to-one correspondence and are threadedly connected to the auxiliary force-bearing support structure of the upper frame or the base plate, and the second bolts are stopped by a second single-ear stop washer.

[0015] Furthermore, a wind pressure gauge and an air volume gauge are provided on the sealed box.

[0016] Furthermore, an adjustment gasket is provided between the brake telescopic cylinder and the sealing box.

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

[0018] 1. The dust removal unit of this invention serves as a brake support, with its upper end connected to the brake unit and its lower end fixed to the lower frame. This structural strength allows it to receive and transmit the braking force to the lower frame. This stable structure facilitates the maintenance of braking force and improves the stability of the unit's operation.

[0019] 2. A vacuum cleaner is placed in the inner cavity of the dust removal unit of the present invention, and the dust collection pipeline is directly connected to the brake unit, thereby avoiding lengthy dust collection pipelines, improving the dust collection effect, and extending the unit overhaul and maintenance cycle.

[0020] 3. The present invention intensively integrates the brake and dust removal device, optimizes the internal space structure of the hydro-generator set, and creates space for the installation of other equipment of the hydro-generator set and maintenance channels.

[0021] 4. The present invention integrates the brake unit, pier and vacuum cleaner into one. The brake pier, together with the brake unit and vacuum pipeline fixed thereon, serves as a subsystem that can operate independently or establish connections with each other. Power station operation and maintenance personnel can simultaneously observe the status data of the brake and vacuum device, and simultaneously perform various maintenance tasks such as cleaning the brake consumables, vacuum pipelines, and vacuum boxes.

[0022] 5. This invention is applicable to large hydro-turbine generator sets of various structures and sizes. It can remove smoke and odor generated by the frequent braking of pumped-storage generator sets during startup and shutdown. This improves dust collection and extends the maintenance cycle of the generator sets. By intensively integrating the brake and brake dust removal device, this invention has a flexible structure and broad engineering application and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a single-chamber self-circulating generator and the layout diagram of the present invention;

[0024] Figure 2 It is a structural diagram of the brake unit;

[0025] Figure 3 Schematic diagram of the dust removal unit structure;

[0026] Figure 4 Schematic diagram of the opening of the dust removal unit;

[0027] Figure 5 yes Figure 2 Top view of .

[0028] In the figure, 1-brake unit; 2-dust removal unit; 3-air duct clamp joint; 4-metal flame retardant hose; 5-brake dust suction joint; 6-first bolt; 7-first single-ear stop washer; 8-adjusting gasket; 9-second bolt; 10-second single-ear stop washer; 11-dust collection box; 12-interface bottom pipe; 13-brake telescopic cylinder; 14-brake seat plate; 15-sealing box; 16-first through hole; 17-drive motor; 18-silent sound-absorbing cotton; 19-dust suction fan; 20-adsorption filter cartridge; 21-air pressure gauge; 22-air volume gauge; 23-junction box; 24-top plate; 25-vertical plate; 26-rib plate; 27-inspection door; 28-bottom plate; 29-threaded hole; 30-sealing hinge; 31-sealing strip; 32-second through hole; 33-brake block; 34-sealing wool strip; 35-dust collection gap. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0030] The connections mentioned in the present invention are divided into fixed connections and detachable connections. The fixed connection refers to a non-detachable connection, including but not limited to conventional fixed connection methods such as hem connection, rivet connection, adhesive connection, and welding connection. The detachable connection refers to but not limited to conventional detachable connection methods such as bolt connection, snap connection, pin connection, and hinge connection. When the specific connection method is not clearly specified, it is assumed that at least one connection method can be found among the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example, a welded connection is selected for a fixed connection, and a bolted connection is selected for a detachable connection.

[0031] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are provided to explain the present invention, but the present invention is not limited to the following embodiments.

[0032] Example: Figures 1 to 5As shown, a single-chamber self-circulating generator brake dust removal unit assembly includes a brake unit 1 and a dust removal unit 2; the brake unit 1 includes a brake telescopic cylinder 13, the output end of the brake telescopic cylinder 13 is provided with a brake seat plate 14, the brake seat plate 14 is provided with a brake block 33, the edge of the brake seat plate 14 is provided with a sealing wool strip 34, a dust collecting gap 35 is formed between the brake block 33 and the sealing wool strip 34, the rear side of the brake seat plate 14 is provided with a dust collecting box 11, the inlet of the dust collecting box 11 passes through the sealing wool strip 34 and is connected to the dust collecting gap 35, and the bottom of the dust collecting box 11 is connected to the interface bottom pipe 12; the dust removal unit 2 includes a sealed box body 15, a dust collector is provided in the sealed box body 15, and the interface bottom pipe 12 is connected to the air inlet of the sealed box body 15 through a brake dust suction joint 5, a metal flame retardant hose 4 and an air duct pipe clamp joint 3 in sequence.

[0033] The dust collector includes a shell, a drive motor 17 and a dust suction fan 19 are arranged in the shell, the drive motor 17 drives the dust suction fan 19 to rotate, the suction end of the dust suction fan 19 is connected to the air outlet of the adsorption filter cartridge 20, the exhaust end of the dust suction fan 19 extends outside the sealed box 15, and the air inlet of the adsorption filter cartridge 20 is inside the sealed box 15.

[0034] Due to the limitation of space size, a high-power drive motor 17 is used to drive a high-speed suction fan 19 to make up for the suction gap of the rated air flow rate of the traditional large-sized dust collection box. By increasing the total number of dust collection devices, the redundancy of the dust collection system is increased, the fault tolerance of the brake dust collection system is improved, and the maintenance and maintenance cycle of the dust collection device is extended.

[0035] The impurity filter cartridge 20 increases the filter barrel area, extends the effective area of ​​the filter screen, reduces the impact of impurities on the dust collection system, and extends the replacement and maintenance cycle of the brake dust removal device.

[0036] The inner wall of the shell is provided with a sound-absorbing cotton 18 .

[0037] The inner wall of the sealed box 15 is provided with a sound-absorbing cotton 18 to form a multi-media noise reduction wall.

[0038] The silent sound-absorbing cotton 18 is composed of a variety of composite materials to form a multi-media noise reduction wall, which can effectively suppress the wind noise and other working noises generated by the brake unit 1 and improve the operation and maintenance environment of the unit.

[0039] The sealed box body 15 includes a top plate 24, a bottom plate 28 and four vertical plates 25. The four vertical plates 25 form a rectangular cylinder with upper and lower openings. The top plate 24 and the bottom plate 28 correspondingly close the upper and lower openings formed by the four vertical plates 25. An inspection port is provided on the rear vertical plate 25, and an inspection door 27 closes the inspection port.

[0040] The inspection door 27 is hinged to the sealing box 15 by a sealing hinge 30 , and the inspection door 27 seals the inspection opening by a sealing strip 31 .

[0041] Ribs 26 are provided between the top plate 24 and the vertical plates 25, and between the bottom plate 28 and the vertical plates 25. The various components of the dust removal unit 2 are welded from high-strength steel plates in a staggered pattern. They are the primary structure for supporting the generator's braking force. Because the inner cavity occupies support space for the high-power vacuum cleaner, the welded ribs 26 improve and strengthen the mechanical strength of the pier.

[0042] The lower plate of the brake unit 1 is provided with a plurality of first through holes 16, and the top plate 24 is provided with a plurality of threaded holes 29. A plurality of first bolts 6 pass through the plurality of first through holes 16 in a one-to-one correspondence and are connected to the plurality of threaded holes 29 in a one-to-one correspondence. The first bolts 6 are stopped by first single-ear stop washers 7.

[0043] A plurality of second through holes 32 are opened on the bottom plate 28 , and a plurality of second bolts 9 pass through the plurality of second through holes 29 in a one-to-one correspondence and are threadedly connected to the auxiliary force-bearing support structure of the upper frame or the base plate. The second bolts 9 are stopped by a second single-ear stop washer 10 .

[0044] The sealed box 15 is provided with an air pressure gauge 21 and an air volume gauge 22. The air pressure gauge 21 and the air volume gauge 22 reflect the operating status of the dust removal system through real-time data of air pressure and air volume. The multi-system modular data analysis is conducive to taking corresponding operation and maintenance strategies in a targeted manner.

[0045] An adjusting gasket 8 is provided between the brake telescopic cylinder 13 and the sealing box 15 .

[0046] Drive motor 17 connects to dust suction fan 19, which draws dust and impurities from the brake surface through adsorption filter cartridge 20. An external power supply supplies power to drive motor 17 through junction box 23. Sealing strips 34 collect dust, iron filings, and oil mist generated by friction between brake pad 33 and retaining ring. Dust suction fan 19 then draws the dust, iron filings, and oil mist into sealed housing 15 via brake dust suction connector 5, metal flame-retardant hose 4, and air duct clamp 3. The dust, iron filings, and oil mist are ultimately filtered through adsorption filter cartridge 20 and collected in the dust collection chamber of adsorption filter cartridge 20.

[0047] The inspection door 27 is hinged to the rear vertical plate 25 by a sealing hinge 30 and a sealing strip 31 . The inspection door 27 and the inner cavity of the dust removal unit 2 form a closed space to enhance the suction force of the brake dust suction device.

[0048] As an extension of the auxiliary part of the bearing of the large hydro-turbine generator set, the dust removal unit 2 itself is connected to the lower frame, bearing the gravity of the brake itself, and mainly bearing the huge braking force under the braking condition of the unit.

[0049] The present invention effectively solves the problems that have always plagued the hydraulic turbine generator set brake dust suction system, such as large space occupation, long and complex dust suction pipes, poor dust suction effect, and fragmented maintenance status monitoring. The present invention has a stable structure, is conducive to maintaining braking force, and improves the stability of the unit operation; avoids lengthy dust suction pipes, improves dust suction effect, and extends the unit overhaul and maintenance cycle; intensively integrates the brake and brake dust removal device, optimizes the internal space structure of the hydraulic turbine generator set, and squeezes out space for the installation of other equipment of the hydraulic turbine generator set and maintenance channels; the brake pier, together with the brake and dust suction pipe, serves as a subsystem, which can operate independently or establish connections with each other. The power station operation and maintenance personnel can simultaneously observe the status data of the brake and dust suction device, and can simultaneously perform various maintenance tasks such as cleaning brake consumables, dust suction pipes, and dust suction boxes; it is applicable to large hydraulic turbine generator sets and pumped storage units of different structures and sizes.

[0050] The dust removal unit 2 of the present invention serves as a brake support, with its upper end connected to the brake unit 1 and its lower end fixed to the lower frame. Its inherent structural strength allows it to receive and transmit the braking force to the lower frame. This stable structure facilitates the maintenance of braking force and improves the stability of the unit's operation.

[0051] A vacuum cleaner is placed in the inner cavity of the dust removal unit 2 of the present invention, and the dust collection pipeline is directly connected to the brake unit 1, thereby avoiding a lengthy dust collection pipeline, improving the dust collection effect, and extending the unit overhaul and maintenance cycle.

[0052] The present invention intensively integrates the brake and the dust removal device, optimizes the internal space structure of the hydro-generator set, and creates space for the installation of other equipment of the hydro-generator set and maintenance channels.

[0053] The present invention integrates the brake unit 1, the pier and the dust collector into one. The brake pier, together with the brake unit 1 fixed thereon and the dust collection pipeline, serves as a subsystem, which can operate independently or establish a connection with each other. The power station operation and maintenance personnel can observe the status data of the brake and the dust collection device at the same time, and perform various maintenance tasks such as cleaning the brake consumables, the dust collection pipeline, and the dust collection box at the same time.

[0054] This invention is applicable to large hydroelectric generator sets of various structures and sizes. It can remove smoke and odor generated by the frequent braking of pumped-storage generator sets during startup and shutdown. It improves dust collection and extends the maintenance cycle of the generator sets. By intensively integrating the brake and brake dust removal device, the invention has a flexible structure and broad engineering applications and promotional value.

[0055] The above embodiments are merely illustrative of the present invention and do not limit its scope of protection. Those skilled in the art may make partial changes thereto, which are within the scope of protection of the present invention as long as they do not exceed the spirit of the present invention.

Claims

1. A single-chamber self-circulating generator brake dust removal unit assembly, characterized by: The invention comprises a brake unit (1) and a dust removal unit (2); the brake unit (1) comprises a brake telescopic cylinder (13); the output end of the brake telescopic cylinder (13) is provided with a brake seat plate (14); the brake seat plate (14) is provided with a brake block (33); the edge of the brake seat plate (14) is provided with a sealing wool strip (34); a dust collecting gap (35) is formed between the brake block (33) and the sealing wool strip (34); a dust collecting box (11) is provided on the rear side of the brake seat plate (14); the inlet of the dust collecting box (11) passes through the sealing wool strip (34) and is communicated with the dust collecting gap (35); the bottom of the dust collecting box (11) is connected to the interface bottom pipe (12); the dust removal unit (2) comprises a sealed box body (15); a dust collector is provided in the sealed box body (15); the interface bottom pipe (12) is connected to the air inlet of the sealed box body (15) through a brake dust suction joint (5), a metal flame retardant hose (4) and an air duct pipe clamp joint (3) in sequence.

2. The single-chamber self-circulating generator brake dust removal unit assembly according to claim 1, characterized in that: The dust collector comprises a housing, a driving motor (17) and a dust collecting fan (19) are arranged in the housing, the driving motor (17) drives the dust collecting fan (19) to rotate, the air suction end of the dust collecting fan (19) is connected to the air outlet of the adsorption filter cartridge (20), the air discharge end of the dust collecting fan (19) extends outside the sealed box (15), and the air inlet of the adsorption filter cartridge (20) is located in the sealed box (15).

3. The single-chamber self-circulating generator brake dust removal unit assembly according to claim 2, characterized in that: The inner wall of the shell is provided with silent sound-absorbing cotton (18).

4. The single-chamber self-circulating generator brake dust removal unit assembly according to claim 3, characterized in that: The inner wall of the sealed box (15) is provided with silent sound-absorbing cotton (18).

5. The single-chamber self-circulating generator brake dust removal unit assembly according to claim 1, characterized in that: The sealed box body (15) includes a top plate (24), a bottom plate (28) and four vertical plates (25). The four vertical plates (25) form a rectangular cylinder with upper and lower openings. The top plate (24) and the bottom plate (28) correspondingly close the upper and lower openings formed by the four vertical plates (25). An inspection port is provided on the vertical plate (25) on the rear side, and an inspection door (27) closes the inspection port.

6. The single-chamber self-circulating generator brake dust removal unit assembly according to claim 5, characterized in that: The inspection door (27) is hinged to the sealing box (15) by a sealing hinge (30), and the inspection door (27) seals the inspection opening by a sealing strip (31).

7. The single-chamber self-circulating generator brake dust removal unit assembly according to claim 5, characterized in that: A rib plate (26) is provided between the top plate (24) and the vertical plate (25), and a rib plate (26) is provided between the bottom plate (28) and the vertical plate (25).

8. The single-chamber self-circulating generator brake dust removal unit assembly according to claim 5, characterized in that: The lower plate of the brake unit (1) is provided with a plurality of first through holes (16), the top plate (24) is provided with a plurality of threaded holes (29), a plurality of first bolts (6) pass through the plurality of first through holes (16) in a one-to-one correspondence and are connected to the plurality of threaded holes (29) in a one-to-one correspondence, and the first bolts (6) are stopped by first single-ear stop washers (7); A plurality of second through holes (32) are formed on the bottom plate (28), and a plurality of second bolts (9) pass through the plurality of second through holes (29) in a one-to-one correspondence and are threadedly connected to the auxiliary force-bearing structure of the upper frame or the base plate, and the second bolts (9) are stopped by a second single-ear stop washer (10).

9. The single-chamber self-circulating generator brake dust removal unit assembly according to claim 1, characterized in that: A wind pressure gauge (21) and an air volume gauge (22) are provided on the sealed box (15).

10. A single-chamber self-circulating generator brake dust removal unit assembly according to any one of claims 1 to 9, characterized in that: An adjusting gasket (8) is provided between the brake telescopic cylinder (13) and the sealing box (15).

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