Power station demonstration model for large-scale mixed-flow water-turbine generator set

Abstract

The utility model provides a large-scale mixed-flow type water turbine generator set power station demonstration model, comprising a water inlet pipe embedded in a dam body close to the bottom, one end of the water inlet pipe close to the downstream of the dam body is communicated with a water inlet square pipe, the downstream of the dam body close to the pipe orifice of the water inlet square pipe is fixedly provided with a fixed station, the middle of the fixed station is provided with a hexagonal hole, and the hexagonal hole is communicated with the water inlet square pipe. A hexagonal hole is formed in the upper surface of the fixing table, a hexagonal sleeve is welded and fixed in the hexagonal hole, a vertical rotating wheel barrel is inserted in the middle of the hexagonal sleeve, a pipe opening in the top end of the hexagonal sleeve is flush with the upper surface of the fixing table, a turbine shell is fixed to the position, located above the hexagonal sleeve, of the upper surface of the fixing table, and a sealing bearing is embedded in the top end of the turbine shell; according to the utility model, the turbine fan blades can be driven to rotate normally only by vortex generated by the turbine shell in a wet season at ordinary times, and once the water level is reduced and the impact pressure of water is reduced, the impact force formed by the vortex can be increased by sequentially opening the three flow regulating valves, so that the continuous and stable output of the turbine fan blades can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of generator set models, in particular to a large-scale Francis turbine generator set power station demonstration model. Background Art

[0002] The existing water turbine is a power machine that converts the energy of water flow into rotational mechanical energy. It belongs to the turbine machine among fluid machinery. Most modern water turbines are installed in hydropower stations to drive generators to generate electricity. In the hydropower station, water from the upstream reservoir is led to the water turbine through a water diversion pipe, which drives the turbine runner to rotate and drives the generator to generate electricity. The water that has completed the work is discharged to the downstream through the tailwater pipe. The higher the water head and the greater the flow rate, the greater the output power of the water turbine.

[0003] However, before implementing large-scale operations, a small-scale model drill will be conducted first. During the drill on the model platform, since the water pressure is low and the flow rate cannot be that large, it is difficult to ensure stable power generation during the dry and flood seasons. Therefore, we propose a model that can solve the problem of insufficient water and ensure stable power generation of the generator. A new demonstration model Utility Model Content

[0004] In view of this, the embodiment of the utility model hopes to provide a large-scale mixed flow turbine generator power station demonstration model to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0005] The technical solution of the embodiment of the utility model is implemented as follows: it includes a water inlet pipe embedded in the dam body near the bottom, one end of the water inlet pipe near the downstream of the dam body is connected with a water inlet square pipe, a fixing platform is fixed at the pipe mouth of the water inlet square pipe near the downstream of the dam body, a hexagonal hole is opened in the middle of the fixing platform, and a hexagonal sleeve is welded and fixed in the hexagonal hole, a vertical runner barrel is inserted in the middle of the hexagonal sleeve, the top pipe mouth of the hexagonal sleeve is flush with the upper surface of the fixing platform, and the upper surface of the fixing platform is located above the hexagonal sleeve and fixed with a turbine The turbine shell is provided with a sealed bearing at the top thereof, and the sealed bearing is coaxial with the runner barrel, and a transmission shaft is rotatably connected in the sealed bearing, and a generator set and a turbine blade are respectively fixed at the upper and lower ends of the transmission shaft; a main pipeline is plugged into the side of the water inlet square pipe, and three flow regulating tubes are separated from the end of the main pipeline away from the water inlet square pipe, and the ends of the three flow regulating tubes close to the hexagonal sleeve are obliquely inserted into the interior of the hexagonal sleeve to form a vortex water flow in the same direction as the vortex direction of the turbine shell; and a flow regulating valve is arranged on each of the flow regulating tubes.

[0006] Preferably: a water outlet elbow is fixed to the bottom end of the rotary barrel, and the bottom end opening of the water outlet elbow is horizontally facing the end away from the dam body; the right-angled water outlet elbow can reduce the impact of the high-pressure water column after power generation on the bottom of the dam body, and can also play a role in sand regulation.

[0007] Preferably: a plug hole is opened on the side of the water inlet square pipe, and the aperture of the plug hole is adapted to the diameter of the main pipe. The main pipe is inserted into the water inlet square pipe and bent toward one side of the turbine shell. By setting a section of curved pipe protruding from the inner wall of the main pipe, debris can be prevented from directly entering the main pipe when water is entering.

[0008] Preferably: an adjusting sleeve is sleeved at the inlet of the water inlet pipe, and three centrally symmetrical extension rods are reserved on the side of the adjusting sleeve away from the water inlet pipe, each extension rod is provided with a centripetal T-shaped slide groove, each T-shaped slide groove is slidably connected with a T-shaped slider, a fan-shaped gate is fixed on the side of the T-shaped slider away from the bottom of the groove, the three fan-shaped gates just block the pipe mouth of the water inlet pipe when combined, and a spring stopper is fixed at one end of the bottom of the T-shaped slide groove away from the water inlet pipe, a return spring is arranged between each spring stopper and the corresponding T-shaped slider, rope fixing blocks are fixed on the surfaces of the three fan-shaped gates, and a steel wire rope is fixed on each rope fixing block, fixed pulleys are arranged at the bottom ends of the two extension rods near the bottom, and the two steel wire ropes near the bottom bypass the two corresponding fixed pulleys and extend to the top of the dam.

[0009] Preferably: ridges are reserved on both sides of the oblique lower side of the sector gate near the top, and slots matching the ridges are reserved on the sides of the other two sector gates; by setting the slots and ridges, the bite force between the sector gates can be improved in a fully closed state, thereby ensuring that the sealing portion will not be sunken.

[0010] Preferably: an L-shaped motor frame is fixed near the middle of the upper surface of the fixing platform, and the generator set is fixed on the top of the motor frame to ensure that the generator set will not be affected by the discharged water.

[0011] Preferably: a spoke rod extending toward the middle is fixed to the circumferential outer wall of the rotor barrel near the bottom end, a bearing seat is fixed in the middle of the spoke rod, and the central axis of the turbine blade extends toward the bearing seat at the bottom.

[0012] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0013] 1. A demonstration model of a large-scale mixed-flow turbine generator power station. By setting three flow regulating tubes obliquely inserted into the outer wall of the hexagonal casing, during the normal flood season, the vortex generated by the turbine shell can drive the turbine blades to rotate normally. Once the water level drops and the impact pressure of the water becomes smaller, the three flow regulating valves can be opened in sequence to increase the impact force of the vortex formation, thereby ensuring the continuous and stable output of the turbine blades.

[0014] 2. A demonstration model of a large-scale mixed-flow hydro-turbine generator power station. By setting up three steel ropes and fan-shaped gates, when maintenance is needed, only the three steel ropes need to be lowered at the same time. At this time, the mouth of the water inlet pipe can be closed under the action of the reset spring, reducing the water flow entering the water inlet pipe; if it is necessary to reduce the flow entering the water inlet pipe, it can also be done by lowering the extended length of the three steel ropes.

[0015] 3. A large-scale mixed-flow turbine generator power station demonstration model, which can ensure the stable rotation of the turbine blades under the impact of high-pressure water through the setting of the bearing seat, and avoid the uneven force on the bottom of the transmission rod causing the turbine blades to hit the side wall of the runner barrel.

[0016] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is the overall structural diagram of the utility model after removing the dam body;

[0019] Figure 2 This is a bottom-up three-dimensional structural diagram of the utility model;

[0020] Figure 3 It is a top view of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the water inlet in the reservoir of the utility model;

[0022] Figure 5 It is a cross-sectional view of the utility model.

[0023] Reference numerals:

[0024] 1. Fixed platform; 2. Sealed bearing; 3. Water outlet elbow; 4. Rotor barrel; 5. Flow regulating pipe; 6. Main pipeline; 7. T-shaped slide; 8. Fixed pulley; 9. Adjusting pipe sleeve; 10. Wire rope; 11. Water inlet pipe; 12. Generator set; 13. Turbine shell; 14. Hexagonal sleeve; 15. Flow regulating valve; 16. Water inlet square pipe; 17. Fan-shaped gate; 1701, slot; 18. Reset spring; 19. Rope fixing block; 20. Motor frame; 21. Turbine blades. DETAILED DESCRIPTION

[0025] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0028] In this embodiment: Figure 1-5As shown, a demonstration model of a large-scale mixed-flow turbine generator power station comprises an inlet pipe 11 embedded in the bottom of the dam body, one end of the inlet pipe 11 close to the downstream of the dam body is connected with an inlet square pipe 16, a fixed platform 1 is fixed at the pipe mouth of the downstream of the dam body close to the inlet square pipe 16, a hexagonal hole is opened in the middle of the fixed platform 1, and a hexagonal sleeve 14 is welded and fixed in the hexagonal hole, a vertical runner barrel 4 is inserted in the middle of the hexagonal sleeve 14, the top pipe mouth of the hexagonal sleeve 14 is flush with the upper surface of the fixed platform 1, and a turbine shell 13 is fixed on the upper surface of the fixed platform 1 above the hexagonal sleeve 14, a sealed bearing 2 is embedded in the top of the turbine shell 13, and the sealed bearing 2 is coaxial with the runner barrel 4, a transmission shaft is rotatably connected in the sealed bearing 2, and the upper and lower ends of the transmission shaft are respectively fixed with generator shells. The motor group 12 and the turbine blades 21; the main pipe 6 is inserted into the side of the water inlet square pipe 16, and three flow regulating pipes 5 are separated from the end of the main pipe 6 away from the water inlet square pipe 16. The three flow regulating pipes 5 are obliquely inserted into the interior of the hexagonal sleeve 14 at one end close to the hexagonal sleeve 14 to form a vortex water flow in the same direction as the vortex direction of the turbine shell 13; each flow regulating pipe 5 is provided with a flow regulating valve 15; through the three flow regulating pipes 5 obliquely inserted into the outer wall of the hexagonal sleeve 14, during the normal flood season, only the vortex generated by the turbine shell 13 can drive the turbine blades 21 to rotate normally. Once the water level drops and the impact pressure of the water becomes smaller, the three flow regulating valves 15 are opened in sequence to increase the impact force of the vortex formation, thereby ensuring the continuous and stable output of the turbine blades 21.

[0029] In this embodiment, a water outlet bend pipe 3 is fixed to the bottom end of the rotary barrel 4, and the bottom end opening of the water outlet bend pipe 3 is horizontally facing the end away from the dam body; the right-angled water outlet bend pipe 3 can reduce the impact of the high-pressure water column after power generation on the bottom of the dam body, and can also play a role in sand regulation.

[0030] Among them: a plug hole is opened on the side of the water inlet square tube 16, and the aperture of the plug hole is adapted to the diameter of the main pipe 6. The main pipe 6 is inserted into the water inlet square tube 16 and bends toward one side of the turbine shell 13; by setting a section of curved pipe protruding from the inner wall of the main pipe 6, it can prevent debris from directly entering the main pipe 6 when water is entering.

[0031] Among them: the inlet of the water inlet pipe 11 is sleeved with an adjusting sleeve 9, and the side of the adjusting sleeve 9 away from the water inlet pipe 11 is reserved with three centrally symmetrical extension rods, each of which is provided with a centripetal T-shaped slide 7, each T-shaped slide 7 is slidably connected with a T-shaped slider, and a fan-shaped gate 17 is fixed on the side of the T-shaped slider away from the bottom of the groove. After the three fan-shaped gates 17 are combined, the pipe mouth of the water inlet pipe 11 is just blocked, and a spring block is fixed at one end of the bottom of the T-shaped slide 7 away from the water inlet pipe 11, and a reset spring 18 is arranged between each spring block and the corresponding T-shaped slider, and ropes are fixed on the surface of the three fan-shaped gates 17. A fixed block 19 is provided, and a steel wire rope 10 is fixed on each rope fixing block 19. The bottom ends of the two extension rods near the bottom are provided with fixed pulleys 8, and the two steel wire ropes 10 near the bottom are extended to the top of the dam by bypassing the two corresponding fixed pulleys 8; through the three steel wire ropes 10 and the fan-shaped gate 17, when maintenance is required, only the three steel wire ropes 10 need to be lowered at the same time. At this time, the mouth of the water inlet pipe 11 can be closed under the action of the reset spring 18, reducing the water flow entering the water inlet pipe 11; if it is necessary to reduce the flow entering the water inlet pipe 11, it can also be done by lowering the extended length of the three steel wire ropes 10.

[0032] Among them: the two sides of the fan-shaped gate 17 near the top are reserved with ridges at the lower angle, and the edges of the other two fan-shaped gates 17 are reserved with slots 1701 that are compatible with the ridges; through the set slots 1701 and ridges, the bite force between the fan-shaped gates 17 can be improved in a fully closed state, thereby ensuring that the sealing part will not be sunken.

[0033] Wherein: an L-shaped motor frame 20 is fixed near the middle of the upper surface of the fixing platform 1, and the generator set 12 is fixed on the top of the motor frame 20, ensuring that the generator set 12 will not be affected by the discharged water.

[0034] Among them: a spoke rod extending toward the middle is fixed near the bottom end of the circumferential outer wall of the rotor barrel 4, and a bearing seat is fixed in the middle of the spoke rod, and the central axis of the turbine blade 21 extends to the bearing seat at the bottom. Through the setting of the bearing seat, it can be ensured that the turbine blade 21 rotates stably under the impact of high-pressure water, avoiding uneven force on the bottom of the transmission rod causing the turbine blade 21 to hit the side wall of the rotor barrel 4.

[0035] When demonstrating the device, three flow regulating tubes 5 are set up and obliquely inserted into the outer wall of the hexagonal sleeve 14. During the normal flood season, only the vortex generated by the turbine shell 13 can drive the turbine blades 21 to rotate normally. Once the water level drops and the impact pressure of the water becomes smaller, the three flow regulating valves 15 are opened in sequence to increase the impact force of the vortex formation and ensure the continuous and stable output of the turbine blades 21. If the water level reaches the top of the dam, by controlling the three steel wire ropes 10 and the fan-shaped gate 17, when maintenance is required, only the three steel wire ropes 10 need to be lowered at the same time. At this time, the mouth of the water inlet pipe 11 can be closed under the action of the reset spring 18 to reduce the water flow entering the water inlet pipe 11. If it is necessary to reduce the flow entering the water inlet pipe 11, it can also be done by lowering the extended length of the three steel wire ropes 10.

[0036] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A large-scale mixed flow turbine generator power station demonstration model, comprising a water inlet pipe (11) embedded in a dam body near the bottom, and an end of the water inlet pipe (11) near the downstream of the dam body is connected to a water inlet square pipe (16), characterized in that: A fixed platform (1) is fixed at the downstream of the dam body near the pipe mouth of the water inlet square pipe (16), a hexagonal hole is opened in the middle of the fixed platform (1), and a hexagonal sleeve (14) is welded and fixed in the hexagonal hole, a vertical rotor barrel (4) is inserted in the middle of the hexagonal sleeve (14), the top pipe mouth of the hexagonal sleeve (14) is flush with the upper surface of the fixed platform (1), and a turbine shell (13) is fixed on the upper surface of the fixed platform (1) above the hexagonal sleeve (14), a sealed bearing (2) is embedded at the top of the turbine shell (13), and the sealed bearing (2) is coaxial with the rotor barrel (4). The water inlet square pipe (16) is provided with a main pipe (6) inserted into the side of the water inlet square pipe (16), and three flow regulating pipes (5) are branched from the end of the main pipe (6) away from the water inlet square pipe (16). The ends of the three flow regulating pipes (5) close to the hexagonal sleeve (14) are obliquely inserted into the interior of the hexagonal sleeve (14) to form a vortex water flow in the same direction as the vortex direction of the turbine shell (13); and each of the flow regulating pipes (5) is provided with a flow regulating valve (15).

2. A large-scale Francis turbine generator power station demonstration model according to claim 1, characterized in that: A water outlet elbow (3) is fixed to the bottom end of the rotary barrel (4), and the bottom end opening of the water outlet elbow (3) is horizontally oriented toward an end away from the dam body.

3. A large-scale Francis turbine generator power station demonstration model according to claim 1, characterized in that: The side of the water inlet square pipe (16) is provided with an insertion hole, and the diameter of the insertion hole is matched with the diameter of the main pipe (6). The main pipe (6) is inserted into the water inlet square pipe (16) and bends toward one side of the turbine shell (13).

4. A large-scale Francis turbine generator power station demonstration model according to claim 1, characterized in that: The inlet of the water inlet pipe (11) is sleeved with an adjusting sleeve (9), and three centrally symmetrical extension rods are reserved on the side of the adjusting sleeve (9) away from the water inlet pipe (11), each extension rod is provided with a centripetal T-shaped slide groove (7), each T-shaped slide groove (7) is slidably connected with a T-shaped slider, and a fan-shaped gate (17) is fixed on the side of the T-shaped slider away from the bottom of the groove, and the three fan-shaped gates (17) are combined to exactly block the pipe opening of the water inlet pipe (11), and the T-shaped slide groove (7) is provided with a T-shaped slider. A spring stopper is fixed at one end of the bottom of the groove away from the water inlet pipe (11), a return spring (18) is arranged between each spring stopper and the corresponding T-shaped slider, a rope fixing block (19) is fixed on the surface of the three fan-shaped gates (17), and a steel wire rope (10) is fixed on each rope fixing block (19), and a fixed pulley (8) is arranged at the bottom end of the two extension rods near the bottom, and the two steel wire ropes (10) near the bottom bypass the two corresponding fixed pulleys (8) and extend to the top of the dam.

5. A large-scale Francis turbine generator power station demonstration model according to claim 4, characterized in that: The two side edges of the oblique lower side of the sector-shaped gate (17) near the top are both reserved with ridges, and the edges of the other two sector-shaped gates (17) are both reserved with slots (1701) that match the ridges.

6. A large-scale Francis turbine generator power station demonstration model according to claim 1, characterized in that: An L-shaped motor frame (20) is fixed near the middle of the upper surface of the fixing platform (1), and the generator set (12) is fixed on the top of the motor frame (20).

7. A large-scale Francis turbine generator power station demonstration model according to claim 1, characterized in that: A spoke rod extending toward the middle is fixed near the bottom end of the circumferential outer wall of the rotor barrel (4), a bearing seat is fixed in the middle of the spoke rod, and the central axis of the turbine blade (21) extends toward the bearing seat at the bottom.

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