CN218180312U - Model test bed for simulating water supply object of hydropower station - Google Patents
Model test bed for simulating water supply object of hydropower station Download PDFInfo
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- CN218180312U CN218180312U CN202222644070.3U CN202222644070U CN218180312U CN 218180312 U CN218180312 U CN 218180312U CN 202222644070 U CN202222644070 U CN 202222644070U CN 218180312 U CN218180312 U CN 218180312U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The utility model provides a carry out model test platform of emulation to power station water supply object, including water supply tank, motor, experiment subassembly and the drain box that connects gradually, the experiment subassembly includes that the owner between parallel connection motor and the drain box becomes the load, leads on and thrust bearing cooler, air cooler, leads bearing cooler, water down and leads bearing cooler and main shaft seal. The utility model discloses a carry out full emulation to each working condition of supplying water in the pumped storage power station different seasons, reachs the optimal water supply control strategy to process of the test and experimental data analysis, improves the efficiency of unit.
Description
Technical Field
The utility model relates to a in hydraulic and hydroelectric engineering technical field, specifically be a carry out model test platform of emulation to power station water supply object.
Background
The water supply of the hydropower station comprises technical water supply, fire water supply and domestic water supply. The technical water supply is also called production water supply, and the water supply objects are various electromechanical operation equipment of a hydropower station, such as cooling and lubricating of a guide bearing of a water turbine, an air cooler of a generator, a water-cooled air compressor, a thrust bearing and a guide bearing of the generator, a water-cooled transformer cooler and the like. Technical water supply is an effective guarantee for providing cooling water for the units, and the importance of the technical water supply is conceivable. The technical water supply system is unstable or the water supply control strategy is inaccurate, so that serious loss is brought to the unit, the efficiency of the unit is reduced, and even danger is brought to the safe and stable operation of the power station. Therefore, there is a great need for an experimental device for simulating the water supply condition of a hydropower station.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve prior art's problem, provide a carry out the model test platform of emulation to power station water supply object, carry out full emulation through each working condition of supplying water to pumped storage power station different seasons, reachs the optimal water supply control strategy to test process and experimental data analysis, improve the efficiency of unit.
The utility model discloses a feed water tank, motor, water pump, experiment subassembly and the drain box that connects gradually, the experiment subassembly includes that parallelly connected main change between access water pump and the drain box becomes the load, goes up to lead and thrust bearing cooler, air cooler, leads bearing cooler, water and leads bearing cooler and main shaft seal down.
In a further improvement, each component in the experiment component is connected with a water filter and a matched gate.
Further improve, the test bench still includes converter and sensor, and the converter setting is between water pump and experiment subassembly. The frequency converter is a PID regulator, and the PID regulator can be connected with a controller (PLC). The sensor is arranged at the position 5-8 times of the pipe diameter away from the outlet of the water pump. The water flow is relatively stable, the pressure reading is relatively stable, the reading is relatively easy, and the measurement result is relatively accurate.
The test bed is further improved and further comprises a measurement control system, and the measurement control system is respectively connected with the frequency converter, the sensor and the experiment assembly. And processing the actually measured pressure and flow data under different loads to serve as input conditions.
The water supply tank, the water pump, the experiment assembly and the drainage tank are connected through pipelines, and the pipelines are connected through flanges. The pipeline is formed by mixing a steel pipe and a machine glass pipe.
The utility model has the advantages that:
1. the pipe network can be physically simulated according to the actual water supply object.
2. The flow of a technical water supply system under two configurations of a fixed-frequency pump, an electric valve, a variable-frequency pump, an electric valve and the like is adjusted, and the influence of parameters such as valve opening, water pump rotating speed and the like on the pressure and flow of the technical water supply system under different working conditions is researched.
3. The technical water supply system of the pumped storage power station can be tested and fully simulated according to similar theories, the water supply working conditions of the pumped storage power station in different seasons are fully simulated, and the optimal water supply control strategy is obtained through the analysis of the test process and test data.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention.
In the figure, 1-water supply tank, 2-motor, 3-main transformer load, 4-upper guide and thrust bearing cooler, 5-air cooler, 6-lower guide bearing cooler, 7-water guide bearing cooler, 8-main shaft seal and 9-water drainage tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The utility model discloses the structure is as shown in the figure, including water supply tank 1, motor 2, water pump, experiment subassembly and the drain box 9 that connects gradually, the experiment subassembly includes that parallelly connected main change load 3 between water pump and the drain box is gone up to lead and thrust bearing cooler 4, air cooler 5, lead bearing cooler 6, water down and lead bearing cooler 7 and main shaft seal 8.
The main transformer load: the main transformer is key equipment for ensuring safe and stable operation of the traction power supply system.
The upper guide, the lower guide, the water guide and the thrust bearing cooler are as follows: the guide bearing mainly bears the mechanical unbalance force of the rotor and the unilateral magnetic pull force caused by the eccentricity of the rotor, and the main function of the guide bearing is to prevent the shaft from swinging. The main function of the thrust bearing is to bear the entire weight of the generator and turbine rotors and the entire axial thrust generated by the water flow.
The air cooler is characterized in that: the air cooler is used for cooling air with higher temperature from the generator by using cooling water and then sending the air into the generator.
The main shaft is sealed: the main shaft seal is a seal device at the rotating main shaft and the fixed top cover of the water turbine and is arranged for reducing the sealing water leakage when the unit operates.
Further improved, each component in the experiment component is connected with a water filter and a matched gate.
Further improve, the test bench still includes converter and sensor, and the converter setting is between motor and experiment subassembly. The frequency converter is a PID regulator, and the PID regulator can be connected with a controller (PLC).
The controller (PLC) employs: the Siemens s7-200 series realize precise control.
The sensor is arranged at the position 5-8 times of pipe diameter away from the outlet of the water pump. The water flow is relatively stable, the pressure reading is relatively stable, the reading is relatively easy, and the measurement result is relatively accurate.
The test bed is further improved, and the test bed further comprises a measurement control system, and the measurement control system is respectively connected with the frequency converter, the sensor and the experiment assembly. And processing the actually measured pressure and flow data under different loads to serve as input conditions.
The improvement is further realized, through the pipe connection between feed water tank, water pump, experiment subassembly and the drain tank, through flange joint between the pipeline. The pipeline is a mixture of a steel pipe and a machine glass pipe. And a water pump is arranged between the pipelines, and a water outlet of the water pump is provided with a pressure sensor.
And selecting a normal model according to the requirements of the test content. The local model of the diversion branch pipe of the pumped storage power station is a pressure system, is designed according to the Euler (Euler) similarity criterion, and simultaneously meets the Froude similarity relation of a general hydraulic model.
Taking a certain pumped storage power station as an example, the lift of a water supply pump is about 45m, the water supply main pipe is 35cm, the water supply branch pipe of a generator air cooler is 30cm, and the water supply branch pipe of a thrust bearing is 4cm. A model scale is selected for the test: 4. the corresponding other physical quantity scales are respectively as follows:
length scale alpha l ＝4
Flow rate scale alpha V ＝2
Flow rate scale alpha Q ＝32
Pressure scale alpha p ＝4
Rotation speed scale alpha n ＝0.5
Each unit of the power station is provided with 2 technical water supply pumps (Q =1300 m) 3 H, H =45 m), the flow Q of the water supply pump of the test model M ＝40.625m 3 H, lift H M =11.25m. The prototype and model parameters of each technical water supply object can be calculated.
The model test determines the test working condition according to the actual operation working condition of the pumped storage power station, and then the following test steps are carried out:
and (4) changing the opening of the valve under a fixed working condition, and measuring whether the pressure and flow change meet the actual requirement. Comparing the power consumption of the water pump, and searching for the optimal valve opening; and changing the rotating speed of the water pump under a fixed working condition, and measuring whether the pressure and flow change meet the actual requirement. Comparing the power consumption of the water pump, and searching for the optimal valve opening; changing pressure and flow input (corresponding to load change operation in actual power station operation), and repeating the two operations; and (4) carrying out test verification on system adjusting time and test testing on a fault early warning system.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the above description of the apparatus embodiment is only a preferred embodiment of the present invention, and since it is substantially similar to the method embodiment, it is relatively simple to describe, and reference may be made to the partial description of the method embodiment for relevant points. The above description is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, without departing from the principle of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A model test bench for simulating a hydropower station water supply object is characterized in that: including water supply tank, motor, water pump, experiment subassembly and the water drainage tank that connects gradually, the experiment subassembly includes that the parallelly connected owner who inserts between water pump and the water drainage tank becomes load, leads and thrust bearing cooler, air cooler, leads bearing cooler, water and leads bearing cooler and main shaft seal down.
2. The model test stand for simulating a hydropower plant water supply object of claim 1, characterized in that: the main transformer load ensures the safe and stable operation of the traction power supply system, and the upper guide and thrust bearing cooler, the lower guide bearing cooler and the water guide bearing cooler bear the mechanical unbalance force of the rotor and the unilateral magnetic pull force caused by the eccentricity of the rotor, so as to prevent the shaft from swinging; the thrust bearing bears power generation of 8206, water of an engine rotor of 8206, power generation of a turbine rotor of 8206, total weight of 8206and total axial direction of water flow of 8206and pushing; the air cooler cools the air with higher temperature from the generator by using cooling water and then sends the air into the generator; the main shaft seal is a sealing device at the rotating main shaft and the fixed top cover of the water turbine, and the water leakage amount of the seal is reduced when the unit operates.
3. The model test stand for simulating a hydropower plant water supply object according to claim 1 or 2, characterized in that: and each component in the experiment component is connected with a water filter and a matched gate.
4. The model test stand for simulating a hydropower plant water supply object according to claim 1 or 2, characterized in that: the test bed further comprises a frequency converter and a sensor, and the frequency converter and the sensor are arranged between the water pump and the experiment assembly.
5. The model test stand for simulating a hydropower plant water supply object according to claim 4, characterized in that: the sensor is arranged at the position 5-8 times of the pipe diameter away from the outlet of the water pump.
6. The model test stand for simulating a hydropower plant water supply object according to claim 1 or 2, characterized in that: the test bed further comprises a measurement control system, and the measurement control system is respectively connected with the frequency converter, the sensor and the experiment assembly.
7. The model test stand for simulating a hydropower plant water supply object according to claim 4, characterized in that: the frequency converter is a PID regulator.
8. The model test stand for simulating a hydropower plant water supply object according to claim 1 or 2, characterized in that: through the pipe connection between feed water tank, water pump, experiment subassembly and the drain tank, through flange joint between the pipeline.
9. The model test stand for simulating a hydropower plant water supply object according to claim 8, wherein: the pipeline is a steel pipe or a machine glass pipe.
10. The model test stand for simulating a hydropower plant water supply object according to claim 1 or 2, characterized in that: and a model scale 1 is zoomed to a model scale 4 between each component in the test bed and the hydropower station prototype, wherein the length scale alpha is as follows l =4, flow rate scale α V =2, flow rate scale alpha Q =32, pressure scale alpha p =4, rotation speed scale α n =0.5。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222644070.3U CN218180312U (en) | 2022-10-09 | 2022-10-09 | Model test bed for simulating water supply object of hydropower station |
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| CN202222644070.3U CN218180312U (en) | 2022-10-09 | 2022-10-09 | Model test bed for simulating water supply object of hydropower station |
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