Gate type integral water-turbine generator set

Abstract

The invention relates to the technical field of water conservancy projects, in particular to a gate type integral water-turbine generator set which comprises a gate, a water-turbine generator set body and a water-turbine generator set body. The generator set comprises a water turbine seat ring, a generator, a water turbine, a draft tube and a water guide mechanism, the generator comprises a rotating wheel rotor assembly and a generator stator, the water turbine and the generator are integrally assembled, a flow channel is formed in the water turbine, and the water guide mechanism comprises a first guide ring part, a guide vane and a speed regulator; the rectification inversion intelligent control box is used for monitoring the water head, the rotating speed and the generator power in real time; the first guide ring part comprises a first inner guide ring and a first outer guide ring, and the first inner guide ring and the first outer guide ring are fixed in a welding mode. The invention has the advantages of reasonable structural design, low technical complexity, high operation reliability, long service life, capability of keeping higher efficiency, economy, environmental protection, remarkable energy-saving effect, high energy utilization rate and wide market application prospect.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering technology, and in particular to a gate-type integrated hydro turbine generator set. Background Technology

[0002] Currently, conventional sluice gates are only used as water-retaining and water-discharging structures. A dam may have several or even dozens of sluice gates. In order to utilize more water energy, there is an urgent need for a sluice gate-type hydro-turbine generator unit that is low in construction cost, easy to install, and maintenance-free.

[0003] Hydropower turbine generator sets convert water energy into electrical energy and are the basic unit of a hydropower station. Conventional hydropower turbine generator sets usually use DC-excited synchronous generators, which can only operate at a constant speed, i.e., the rated synchronous speed. The generator speed is fixed to ensure that the frequency of the current output to the grid is the power frequency. In addition, conventional hydropower turbines are usually designed to reach near the optimal unit speed under a certain water head. Hydropower turbines have good performance and high efficiency when operating near the optimal unit speed. However, when the water head changes, the unit speed of the hydropower turbine also changes. When it deviates from the optimal unit speed, the efficiency of the hydropower turbine decreases significantly, the cavitation coefficient increases, abrasion and unit vibration increase, the operating conditions of the unit deteriorate, and the safe operation of the unit is affected. Thus, the energy utilization rate cannot be maximized, resulting in a certain amount of waste.

[0004] In typical hydropower stations, whether in the initial or formal operation phase, the head varies widely, making it impossible for the turbines to operate continuously at their optimal condition.

[0005] To address this issue, the present invention proposes a gate-type integrated hydro-turbine generator set. Summary of the Invention

[0006] The purpose of this invention is to at least address one of the aforementioned technical deficiencies.

[0007] Therefore, one object of the present invention is to provide a gate-type integrated hydro-turbine generator set to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0008] To achieve the above objectives, one embodiment of the present invention provides a gate-type integrated hydro-turbine generator set, comprising: a gate on which a generator set is mounted; the generator set includes a turbine mounting ring, a generator, a turbine, a tailrace pipe, and a water guiding mechanism; the generator includes a runner rotor assembly and a generator stator; the turbine is integrally assembled with the generator and has a flow channel thereon; the water guiding mechanism includes a first guide ring, guide vanes, and a speed governor; and a rectifier-inverter intelligent control box for real-time monitoring of head, speed, and generator power.

[0009] Preferably, in any of the above embodiments, the first guide ring portion includes a first inner guide ring and a first outer guide ring, the first inner guide ring and the first outer guide ring are fixed together by welding, and the first guide ring portion is disposed at the end of the turbine flow channel.

[0010] Preferably, in any of the above embodiments, the turbine mounting ring includes a second guide ring portion and a fixed guide vane, wherein the second guide ring portion is fixedly connected to the first guide ring portion.

[0011] Preferably, in any of the above embodiments, the second guide ring component includes a second inner guide ring and a second outer guide ring, both of which are conical surfaces, and the second inner guide ring and the second outer guide ring are fixed by welding.

[0012] Preferably, in any of the above schemes, the generator stator is detachably connected to the second inner guide ring.

[0013] Preferably, in any of the above embodiments, the impeller rotor assembly is connected to the second inner guide ring via a bearing; the impeller rotor assembly includes a main shaft, an impeller, a rotor core, and rare earth permanent magnets, the rare earth permanent magnets being placed in a magnet slot near the outer circumference of the rotor core, and the rotor core being provided with excitation magnets.

[0014] Preferably, in any of the above schemes, the main shaft is located at the center of the rotor assembly, and the main shaft is connected to the inner guide ring via a bearing.

[0015] Preferably, in any of the above embodiments, the generator stator includes a stator core, a stator winding, and a frame. The stator winding is wound on the stator core, and the stator core is fixed to the frame. The stator core and the winding are encased in stainless steel plates and form a sealed cavity with the frame. The sealed cavity is filled with a sealing coating.

[0016] Preferably, one end of the impeller is fixed to the end of the first guide ring, and the other end is fixedly connected to the tailwater pipe.

[0017] Preferably, in any of the above schemes, the gate is fixed to the turbine base ring.

[0018] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows: With a reasonable structural design, low technical complexity, high operational reliability, long service life, and high efficiency, it has significant economic, environmental, and energy-saving effects, high energy utilization rate, and broad market application prospects.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an overall schematic diagram according to an embodiment of the present invention; Figure 2 This is a partial schematic diagram according to an embodiment of the present invention; Figure 3 This is a partial cross-sectional schematic diagram according to an embodiment of the present invention.

[0021] In the diagram: 1. Gate, 2. Generator set, 21. Turbine seat ring, 2101. Second guide ring, 22. Generator, 2201. Rotor assembly, 2202. Generator stator, 2203. Main shaft, 23. Turbine, 24. Tailstream pipe, 25. Water guiding mechanism, 2501. First guide ring, 3. Rectifier-inverter intelligent control box. Detailed Implementation

[0022] like Figures 1 to 3 As shown, a gate-type integrated hydro-turbine generator set includes a gate 1, a generator set 2, and a rectifier-inverter intelligent control box 3.

[0023] Furthermore, the generator set 2 is mounted on the valve and includes a turbine base ring 21, a generator 22, a turbine 23, a tailrace pipe 24, and a water guiding mechanism 25.

[0024] Specifically, the generator 22 includes a rotor assembly 2201 and a generator stator 2202; The generator stator 2202 and the inner ring of the turbine base ring 21 are assembled together by flange connection, serving as the fixed part of the unit. Together with the internal rotatable runner rotor assembly 2201, they form a cross-flow integrated hydro-generator unit 2. The generator stator 2202 and the internal runner rotor assembly 2201 are indispensable stator and rotor structures of the generator 22. Both are waterproof and can operate safely underwater at 220m, making the entire unit a gate 1 type integrated hydro-generator unit 2. The water turbine 23 is integrally assembled with the generator 22 and has a flow channel on it; The water guiding mechanism 25 includes a first guide ring 2501, guide vanes, and a speed regulator; The water guiding mechanism 25 and the speed regulator are arranged underwater. The guide vanes can be adjusted in opening. When the guide vanes are fully closed, all water flow is cut off. When the gate 1 is opened, power generation begins. The first guide ring portion 2501 includes a first inner guide ring and a first outer guide ring, which are fixed together by welding. The first guide ring portion 2501 is disposed at the end of the flow channel of the turbine 23. The turbine mounting ring 21 includes a second guide ring portion 2101 and a fixed guide vane, wherein the second guide ring portion 2101 is fixedly connected to the first guide ring portion 2501; The fixed guide vane is fixed to the second guide ring 2101 by welding, thereby transferring the weight of the entire unit to the outer ring of the seat ring to protect the unit from overload damage. One end of the fixed guide vane is fixed to the second outer guide ring, and the other end is fixed to the first inner guide ring. The second guide ring part 2101 includes a second inner guide ring and a second outer guide ring. Both the second inner guide ring and the second outer guide ring are conical surfaces. The second inner guide ring and the second outer guide ring are fixed by welding. The generator stator 2202 is detachably connected to the second inner guide ring; The runner rotor assembly 2201 is connected to the second inner guide ring by a bearing. The turbine base ring 21 bears various underwater loads such as the self-weight of the runner rotor assembly 2201, axial water thrust, and rotational centrifugal force. Two mechanical seals are provided between the rolling bearing and the water to prevent the bearing from being corroded by water flow. The rotor assembly 2201 includes a main shaft 2203, a rotor, a rotor core, and rare earth permanent magnets. The rare earth permanent magnets are placed in a magnet slot near the outer circle of the rotor core, and the rotor core is provided with magnets for excitation. The rotor assembly 2201 does not contain traditional magnetic pole windings, thus enabling it to operate safely in water for extended periods. The main shaft 2203 is located at the center of the rotor assembly 2201, and the main shaft 2203 is connected to the inner guide ring by a bearing. The generator stator 2202 is detachably mounted on the inner guide ring; The generator stator 2202 includes a stator core, a stator winding, and a frame. The stator winding is wound on the stator core and the stator core is fixed on the frame. The stator core and the winding are encased in stainless steel plates and form a sealed cavity with the frame. The sealed cavity is filled with a sealing coating, which is epoxy resin, forming a generator stator 2202 structure that can operate safely underwater for a long time. One end of the impeller is fixed to the end of the first guide ring 2501, and the other end is fixedly connected to the tailwater pipe 24. After the water flows through the gate 1, the turbine base ring 21, and the water guiding mechanism 25, it drives the rotor assembly 2201 to rotate, converting the potential energy of the water flow into mechanical energy and then into electrical energy, which is output to the rectifier-inverter intelligent control system. The rectifier-inverter then converts the electrical energy into power frequency AC power and transmits it to the power grid.

[0025] Furthermore, the gate 1 is fixed to the turbine base ring 21, and when the gate 1 is opened, the gate 1 hole; Furthermore, the rectifier-inverter intelligent control box 3 is used to monitor the head, speed, and generator 22 power in real time and automatically calculate the actual speed of the turbine 23 corresponding to the optimal unit speed, thereby adjusting this speed signal to maximize the energy conversion efficiency of the turbine 23.

[0026] During installation, the gate 1, the inner and outer cones of the turbine base ring 21, the water guiding mechanism 25, the runner of the rotor assembly 2201, and the tailrace pipe 24 are assembled into a single unit on the ground. Then, the unit is lifted and lowered. Once the gate 1 reaches the bottom, a complete turbine 23 flow channel is formed. Pressurized water flows through the turbine base ring 21 flow channel, driving the rotor assembly 2201 to rotate and generate electricity. The electricity is then discharged downstream through the tailrace pipe 24, which recovers energy. All loads on the unit, including water pressure, axial water thrust, and the unit's own weight, are reliably transmitted to the foundation through the gate 1 under the influence of gravity and axial water thrust. The unit can be lifted up and installed and lowered for maintenance and disassembly through the guide groove of gate 1, thereby achieving overall disassembly and assembly on the ground, which provides good conditions for maintenance and simplifies the maintenance process; The unit adopts an underwater structure layout, with the outer wall of the generator 22 frame directly immersed in water, which can effectively remove the heat from the generator stator 2202, keeping the temperature rise of the generator 22 within a certain range and ensuring the reliability of the generator 22. This device is mainly used in channels or rivers with a water head of 0.5 to 10m and a large range. It only needs to be equipped with a water gate, a trash rack and a rectifier-inverter intelligent control system arranged on the bank to achieve network access and daily maintenance. The alternating current output by generator 22 has a frequency range of 220 to 75 Hz. The alternating current is rectified into direct current by a rectifier, and the direct current is converted into power frequency alternating current by a converter and sent to the power grid. It can be widely used in hydropower stations with low head and large amplitude variation, as well as power stations in remote areas without operators. It can effectively improve the operating efficiency of the unit, reduce unit vibration and turbine blade cavitation wear, make full use of water power as a renewable and clean energy source, reduce human resources and investment construction costs, and improve the economic benefits of the power station.

Claims

1. A gate-type integrated hydro-turbine generator set, characterized in that: include: A sluice gate, on which a generator set is installed; The generator set includes a turbine housing ring, a generator, a turbine, a tailrace pipe, and a water guiding mechanism. The generator includes a runner rotor assembly and a generator stator. The turbine is integrally assembled with the generator and has a flow channel. The water guiding mechanism includes a first guide ring, guide vanes, and a speed governor. The rectifier-inverter intelligent control box is used to monitor water head, speed, and generator power in real time.

2. The gate-type integrated hydro-turbine generator set according to claim 1, characterized in that: The first guide ring portion includes a first inner guide ring and a first outer guide ring, which are fixed together by welding. The first guide ring portion is located at the end of the turbine flow channel.

3. A gate-type integrated hydro-turbine generator set according to claim 2, characterized in that: The turbine mounting ring includes a second guide ring and a fixed guide vane, wherein the second guide ring is fixedly connected to the first guide ring.

4. A gate-type integrated hydro-turbine generator set according to claim 3, characterized in that: The second guide ring component includes a second inner guide ring and a second outer guide ring. Both the second inner guide ring and the second outer guide ring are conical surfaces, and the second inner guide ring and the second outer guide ring are fixed by welding.

5. A gate-type integrated hydro-turbine generator set according to claim 4, characterized in that: The generator stator is detachably connected to the second inner guide ring.

6. A gate-type integrated hydro-turbine generator set according to claim 4, characterized in that: The rotor assembly of the impeller is connected to the second inner guide ring via a bearing; The rotor assembly includes a main shaft, a rotor, a rotor core, and rare earth permanent magnets. The rare earth permanent magnets are placed in a magnet slot near the outer circumference of the rotor core, and the rotor core is provided with magnets for excitation.

7. A gate-type integrated hydro-turbine generator set according to claim 6, characterized in that: The main shaft is located at the center of the rotor assembly, and the main shaft is connected to the inner guide ring by a bearing.

8. A gate-type integrated hydro-turbine generator set according to claim 5, characterized in that: The generator stator includes a stator core, stator windings, and a frame. The stator windings are wound on the stator core, and the stator core is fixed to the frame. The stator core and windings are encased in stainless steel plates and form a sealed cavity with the frame. The sealed cavity is filled with a sealing coating.

9. A gate-type integrated hydro-turbine generator set according to claim 1, characterized in that: One end of the impeller is fixed to the end of the first guide ring, and the other end is fixedly connected to the tailwater pipe.

10. A gate-type integrated hydro-turbine generator set according to claim 1, characterized in that: The gate is fixed to the turbine base ring.

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