Bulb tubular hydroelectric generating set rotor collector ring conductive structure

Abstract

The utility model relates to the technical field of hydroelectric generation, and provides a bulb tubular hydroelectric generating set rotor collector ring conductive structure which comprises a rotor body. Parts fastened through the first bolt, the second bolt and the third bolt can be locked through the existence of the thread locking glue, a worker can make the copper bar make contact with the collecting ring plane to conduct electricity, and the first rotor lead, the second rotor lead and the third rotor lead are fixed through the screws. The collector ring is replaced with a forged steel material, so that the wear resistance of the collector ring is enhanced, and the collector ring is of a split structure, so that the collector ring can be hoisted through a vertical shaft, the collector ring is convenient to overhaul and maintain, and the potential safety hazards that the collector ring is heated and burnt out and the rotor is grounded due to looseness of a conductive screw rod are inconvenient to eliminate are solved; daily maintenance and consumption of maintainers are inconvenient, safety, stability and reliability of equipment operation are inconvenient to improve, and safe and stable operation of a power station is inconvenient to guarantee.

Description

Technical Field

[0001] The utility model relates to the technical field of hydropower generation, in particular to a conductive structure of a rotor collector ring of a bulb-type tubular hydro-generator set. Background Art

[0002] Water turbines are an essential component of the hydropower industry. They can fully utilize clean and renewable energy to achieve energy conservation, emission reduction, and environmental pollution reduction. my country currently has a large number of installed water turbines, with the most common types being Francis, axial, and tubular. The bulb tubular turbine unit is a generator set suitable for low-head operation. The generator is sealed in a bulb-shaped metal casing on the upstream side of the turbine. The generator is installed horizontally, with the main shaft of the generator directly connected to the turbine runner, and both are mounted on a steel bulb casing. The generator is inside the bulb casing, and the runner is at the end of the bulb. The generator bearing is fixed to the bulb casing via a bearing support ring, and the runner end bearing is fixed to the bulb end casing. The steel bulb casing is fixed to the concrete foundation via upper and lower struts.

[0003] The patent specification with announcement number CN206495745U discloses an installation structure of a small-scale integrated rotating propeller bulb cross-flow hydro-turbine generator set, including an integrated rotating propeller bulb cross-flow hydro-turbine generator set arranged in the waterway foundation of a hydropower station, a shell mounting seat is provided in the generator set and is fixedly connected to the foundation base in the waterway foundation of the hydropower station, the water inlet end and the water outlet end of the integrated rotating propeller bulb cross-flow hydro-turbine generator set are respectively sealed with the water inlet pipe and the water outlet pipe in the waterway foundation of the hydropower station, an integral lifting hook is provided on the top of the integrated rotating propeller bulb cross-flow hydro-turbine generator set, a lifting platform and a crane installation support column are provided above the waterway foundation of the hydropower station, and a lifting crane is provided on the crane installation support column; as long as a smaller lifting platform and lifting crane are provided, the small-scale integrated rotating propeller bulb cross-flow hydro-turbine generator set can be installed quickly and conveniently, the foundation construction project of the hydropower station is small, and the installation and use are convenient, which can reduce the operating cost and improve the economic benefit.

[0004] However, in the implementation of relevant technologies, it was found that the above technical solution has the following problems: during the use of the above device, the connection between the collector ring and the conductive screw and the base bracket becomes loose during long-term operation, and there is a phenomenon of reduced insulation wear, which poses a risk of rotor grounding. The structural design of the collector ring conductive screw is unreasonable. The collector ring conductive nut is prone to loosening under the action of vibration, oscillation, etc. during operation, and then deformed, resulting in local overheating of the collector ring, and there is a safety hazard of collector ring burning. The collector ring conductive screw nut is installed inside the generator wind tunnel, which is not conducive to daily maintenance and inspection. Pits appear on the surface of the collector ring slip ring during long-term operation, and the smoothness decreases. Sparks and discharges often occur, and there are safety risks in long-term operation. The overall size of the collector ring is large. After a fault occurs, it cannot be lifted out from the generator bubble head shaft. The generator bubble head and shaft must be removed before lifting. The maintenance is difficult, the cycle is long, and the cost is high. Therefore, further improvement is needed. Utility Model Content

[0005] The utility model proposes a conductive structure for the rotor collector ring of a bulb-type cross-flow hydro-turbine generator set, which solves the problems in related technologies such as the difficulty in eliminating the potential safety hazards of the collector ring heating and burning and the rotor grounding caused by the loosening of the conductive screw, the inconvenience in daily maintenance by maintenance personnel, the inconvenience in improving the safety, stability and reliability of equipment operation, and the inconvenience in ensuring the safe and stable operation of the power station.

[0006] The technical solution of the utility model is as follows:

[0007] A bulb-type cross-flow turbine generator rotor collector ring conductive structure, comprising a rotor body, wherein a first rotor lead, a second rotor lead and a third rotor lead are provided on the outer surface of the rotor body, a first pad is fixedly connected to the lower end of the rotor body, a third insulating block is fixedly connected to the lower end of the first pad, a fourth insulating block is fixedly connected to the lower end of the third insulating block, a second pad is provided at the lower end of the fourth insulating block, a single-ear stop washer is provided at the lower end of the second pad, a second bolt is provided at the lower end of the single-ear stop washer, an auxiliary stop washer is provided at the upper end of the combination of the third rotor lead, the first rotor lead and the second rotor lead, a third bolt is provided at the upper end of the auxiliary stop washer, the third rotor lead is fixedly connected to the first rotor lead and the second rotor lead A nut is provided at the lower end of the sub-lead assembly, and the upper end of the turning point of the third rotor lead is fixedly connected to the first insulating block, and the upper end of the first insulating block is provided with a single-ear stop washer, and the upper end of the single-ear stop washer is provided with a first bolt. The upper end of the turning point of the third rotor lead is fixedly connected to the second insulating block, and the lower end of the second insulating block is fixedly connected to the first plate, and a welding rod is welded between the first plate and the ground. The upper end of the first plate is fixedly connected to the second insulating block, and the upper end of the second insulating block is also fixedly connected to the first insulating block. A second plate is also fixedly connected to the ground, and the upper end of the second plate is also fixedly connected to the second insulating block. Thread locking glue is provided on the outer surfaces of the first bolt, the second bolt and the third bolt.

[0008] Preferably, the lower end of the third insulating block passes through the first rotor lead.

[0009] Preferably, the first rotor lead is located between the third insulating block and the fourth insulating block.

[0010] Preferably, the second bolt passes through the single-ear stop washer and the interior of the second backing plate and is threadedly connected to the fourth insulating block.

[0011] Preferably, the third bolt passes through the auxiliary stop washer, the third rotor lead, the first rotor lead and the second rotor lead assembly and is threadedly connected to the nut.

[0012] Preferably, the first bolt passes through the interior of the single-ear stop washer and is threadedly connected to the first insulating block.

[0013] Preferably, the ground and the second plate are welded by welding rods.

[0014] Preferably, the outer surfaces of the first rotor lead, the second rotor lead and the third rotor lead are brushed with alkali-free glass fiber tape, Tongma epoxy glass powder mica tape, epoxy ester sun-dried red enamel and two-component solvent-free room temperature curing glue.

[0015] The working principle and beneficial effects of the utility model are as follows:

[0016] The utility model is to half-wound three layers of Tongma epoxy glass powder mica tape, brush two-component solvent-free room temperature curing glue while winding, and after the insulation is wrapped and fixed for 24 hours, half-wound two layers of alkali-free glass fiber tape, brush two-component solvent-free room temperature curing glue while winding, and spray epoxy ester sun-dried red enamel after it is cured. After passing the inspection, the first rotor lead, the second rotor lead and the third rotor lead are sprayed with epoxy ester sun-dried red enamel as a whole, which is used to insulate and protect the first rotor lead, the second rotor lead and the third rotor lead. The presence of the thread locking glue will lock the components fastened by the first bolt, the second bolt and the third bolt, and the staff can make the copper busbar contact the plane of the collector ring for conduction, and the first rotor lead The first rotor lead and the second rotor lead are fixed by screws, and the collector ring is replaced with forged steel material to enhance the wear resistance of the collector ring. The collector ring has a split structure, which allows the collector ring to be hoisted through the vertical shaft, so as to facilitate the inspection and maintenance of the collector ring, thereby fundamentally eliminating the safety hazards of heat generation and burning of the collector ring and rotor grounding caused by loose conductive screws, facilitating daily maintenance consumption of maintenance personnel, improving the safety stability and reliability of equipment operation, and ensuring the safe and stable operation of the power station. It solves the problem of inconvenience in eliminating the safety hazards of heat generation and burning of the collector ring and rotor grounding caused by loose conductive screws, inconvenience in daily maintenance consumption of maintenance personnel, inconvenience in improving the safety stability and reliability of equipment operation, and inconvenience in ensuring the safe and stable operation of the power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the third rotor lead structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the first plate structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the partial structure of the third rotor lead of the present utility model;

[0022] Figure 5 This is a schematic diagram of the second plate structure of the utility model;

[0023] Figure 6 For the utility model Figure 1 Enlarged view of point A in the middle;

[0024] Figure 7For the utility model Figure 1 Enlarged view of point B in the middle;

[0025] Figure 8 This is a schematic structural diagram of the third bolt and auxiliary stop washer of the present utility model;

[0026] Figure 9 This is a schematic diagram of the lead wrapping insulation structure of the first rotor lead, the second rotor lead and the third rotor lead of the present invention.

[0027] In the figure: 1. First rotor lead; 2. Second rotor lead; 3. Third rotor lead; 4. First bolt; 5. Single-ear stop washer; 6. First insulating block; 7. Second insulating block; 8. First plate; 9. Thread lock adhesive; 10. Second plate; 11. First pad; 12. Third insulating block; 13. Fourth insulating block; 14. Second pad; 15. Second bolt; 16. Third bolt; 17. Auxiliary stop washer; 18. Nut; 19. Welding rod; 20. E-glass fiber tape; 21. Tongma epoxy glass powder mica tape; 22. Epoxy ester sun-drying red enamel; 23. Two-component solvent-free room temperature curing adhesive. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] like Figures 1-9As shown, this embodiment proposes a conductive structure of a rotor collector ring of a bulb-type cross-flow hydro-generator set, including a rotor body, a first rotor lead 1, a second rotor lead 2, and a third rotor lead 3 are provided on the outer surface of the rotor body, a first pad 11 is fixedly connected to the lower end of the rotor body, a third insulating block 12 is fixedly connected to the lower end of the first pad 11, a fourth insulating block 13 is fixedly connected to the lower end of the third insulating block 12, a second pad 14 is provided at the lower end of the fourth insulating block 13, and a single-ear stopper is provided at the lower end of the second pad 14. The lower end of the single-ear stop washer 5 is provided with a second bolt 15, the upper end of the third rotor lead 3 and the first rotor lead 1, the second rotor lead 2 is provided with an auxiliary stop washer 17, the upper end of the auxiliary stop washer 17 is provided with a third bolt 16, the lower end of the third rotor lead 3 and the first rotor lead 1, the second rotor lead 2 is provided with a nut 18, the upper end of the turning part of the third rotor lead 3 is fixedly connected to the first insulating block 6, the upper end of the first insulating block 6 is provided with a single-ear stop washer 5, the single-ear stop washer 5 is provided with a first bolt 4 at the upper end, the upper end of the third rotor lead 3 is fixedly connected to the second insulating block 7, the lower end of the second insulating block 7 is fixedly connected to the first plate 8, a welding rod 19 is welded between the first plate 8 and the ground, the upper end of the first plate 8 is fixedly connected to the second insulating block 7, the upper end of the second insulating block 7 is also fixedly connected to the first insulating block 6, the ground is also fixedly connected to the second plate 10, the upper end of the second plate 10 is also fixedly connected to the second insulating block 7, the first bolt 4, the second bolt 15 and the third bolt 16 The outer surfaces of the three are all provided with thread locking glue 9, which is used to lock the connection between the fasteners. The connection points of the first rotor lead 1, the second rotor lead 2 and the third rotor lead 3 are all drilled with the end with the hole as a template. The hole size is in accordance with the template. The drilling accuracy of the first rotor lead 1, the second rotor lead 2 and the third rotor lead 3 is required. The ends of the holes required have cutting allowances, and the excess parts of the first rotor lead 1, the second rotor lead 2 and the third rotor lead 3 are cut off.

[0030] Furthermore, the lower end of the third insulating block 12 passes through the first rotor lead 1, and the first rotor lead 1 is located between the third insulating block 12 and the fourth insulating block 13. The second bolt 15 passes through the single-ear stop washer 5, the interior of the second pad 14 and is threadedly connected to the fourth insulating block 13. The third bolt 16 passes through the auxiliary stop washer 17, the third rotor lead 3, the interior of the first rotor lead 1 and the second rotor lead 2 combination and is threadedly connected to the nut 18. The first bolt 4 passes through the interior of the single-ear stop washer 5 and is threadedly connected to the first insulating block 6. The ground and the second plate 10 are welded by a welding rod 19.

[0031] Furthermore, the outer surfaces of the first rotor lead 1, the second rotor lead 2 and the third rotor lead 3 are brushed with alkali-free glass fiber tape 20, Tongma epoxy glass powder mica tape 21, epoxy ester sun-drying red enamel 22 and a two-component solvent-free room temperature curing adhesive 23. The alkali-free glass fiber tape 20, Tongma epoxy glass powder mica tape 21, epoxy ester sun-drying red enamel 22 and the two-component solvent-free room temperature curing adhesive 23 are used to enhance the insulation effect of the first rotor lead 1, the second rotor lead 2 and the third rotor lead 3. After passing the inspection, the first rotor lead 1, the second rotor lead 2 and the third rotor lead 3 will be sprayed with epoxy ester sun-drying red enamel 22 as a whole to protect the first rotor lead 1, the second rotor lead 2 and the third rotor lead 3.

[0032] The working principle and usage instructions of the present invention are as follows: The order of wrapping the insulation of the first rotor lead 1, the second rotor lead 2 and the third rotor lead 3 is as follows: first, half-wrap three layers of Tongma epoxy glass powder mica tape 21, and brush two-component solvent-free room temperature curing glue 23 while wrapping. After the insulation is fixed for 24 hours, half-wrap two layers of alkali-free glass fiber tape 20, and brush two-component solvent-free room temperature curing glue 23 while wrapping. After the glue is cured, spray epoxy ester sun-drying red enamel 22. After passing the inspection, the first rotor lead 1, the second rotor lead 2 and the third rotor lead 3 will be sprayed with epoxy ester sun-drying red enamel 22 as a whole to insulate and protect the first rotor lead 1, the second rotor lead 2 and the third rotor lead 3. , and the presence of the thread locking glue 9 will lock the components fastened by the first bolt 4, the second bolt 15 and the third bolt 16. The staff can make the copper busbar contact the plane of the collector ring for conductivity, and the first rotor lead 1, the second rotor lead 2 and the third rotor lead 3 are fixed by screws, and the collector ring is replaced with forged steel material to enhance the wear resistance of the collector ring. The collector ring has a split structure, so that the collector ring can be hoisted through the vertical shaft, which is convenient for the inspection and maintenance of the collector ring, thereby fundamentally eliminating the safety hazards of heat and burning of the collector ring and rotor grounding caused by loose conductive screws, facilitating daily maintenance consumption of maintenance personnel, improving the safety, stability and reliability of equipment operation, and ensuring the safe and stable operation of the power station.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bulb-type hydro-generator rotor collector ring conductive structure, comprising a rotor body, characterized in that: A first rotor lead (1), a second rotor lead (2) and a third rotor lead (3) are provided on the outer surface of the rotor body; a first pad (11) is fixedly connected to the lower end of the rotor body; a third insulating block (12) is fixedly connected to the lower end of the first pad (11); a fourth insulating block (13) is fixedly connected to the lower end of the third insulating block (12); a second pad (14) is provided at the lower end of the fourth insulating block (13); and the second pad (14) is fixedly connected to the lower end of the third insulating block (12). The lower end of the single-ear stop washer (5) is provided with a second bolt (15), the upper end of the third rotor lead (3) and the first rotor lead (1) and the second rotor lead (2) is provided with an auxiliary stop washer (17), the upper end of the auxiliary stop washer (17) is provided with a third bolt (16), the lower end of the third rotor lead (3) and the first rotor lead (1) and the second rotor lead (2) is provided with a screw. The mother (18) comprises a first insulating block (6) fixedly connected to the upper end of the turning point of the third rotor lead (3), a single-ear stop washer (5) provided on the upper end of the first insulating block (6), a first bolt (4) provided on the upper end of the single-ear stop washer (5), a second insulating block (7) fixedly connected to the upper end of the turning point of the third rotor lead (3), a first plate (8) fixedly connected to the lower end of the second insulating block (7), a welding rod (19) welded between the first plate (8) and the ground, a second insulating block (7) fixedly connected to the upper end of the second insulating block (7), and the first insulating block (6) fixedly connected to the upper end of the second insulating block (7), a second plate (10) fixedly connected to the ground, and a second insulating block (7) fixedly connected to the upper end of the second plate (10), and a thread locking glue (9) provided on the outer surfaces of the first bolt (4), the second bolt (15) and the third bolt (16).

2. The conductive structure of the rotor collector ring of a bulb-type tubular hydro-generator set according to claim 1, characterized in that: The lower end of the third insulating block (12) passes through the first rotor lead (1).

3. The conductive structure of the rotor collector ring of a bulb-type tubular hydro-generator set according to claim 1, characterized in that: The first rotor lead (1) is located between the third insulating block (12) and the fourth insulating block (13).

4. The conductive structure of the rotor collector ring of a bulb-type tubular hydro-generator set according to claim 1, characterized in that: The second bolt (15) passes through the single-ear stop washer (5) and the interior of the second pad (14) and is threadedly connected to the fourth insulating block (13).

5. The conductive structure of the rotor collector ring of a bulb-type tubular hydro-generator set according to claim 1, characterized in that: The third bolt (16) passes through the auxiliary stop washer (17), the interior of the third rotor lead (3), the first rotor lead (1) and the second rotor lead (2) combination and is threadedly connected to the nut (18).

6. The conductive structure of the rotor collector ring of a bulb-type tubular hydro-generator set according to claim 1, characterized in that: The first bolt (4) passes through the interior of the single-ear stop washer (5) and is threadedly connected to the first insulating block (6).

7. The conductive structure of the rotor collector ring of a bulb-type tubular hydro-generator set according to claim 1, characterized in that: The ground and the second plate (10) are welded via welding rods (19).

8. The conductive structure of the rotor collector ring of a bulb-type tubular hydro-generator set according to claim 1, characterized in that: The outer surfaces of the first rotor lead (1), the second rotor lead (2) and the third rotor lead (3) are brushed with alkali-free glass fiber tape (20), tungma epoxy glass powder mica tape (21), epoxy ester sun-dried red enamel paint (22) and two-component solvent-free room temperature curing glue (23).

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