CN110735761A - axial flow type water turbine water distribution device and water turbine energy-saving design method - Google Patents
axial flow type water turbine water distribution device and water turbine energy-saving design method Download PDFInfo
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- CN110735761A CN110735761A CN201910984830.5A CN201910984830A CN110735761A CN 110735761 A CN110735761 A CN 110735761A CN 201910984830 A CN201910984830 A CN 201910984830A CN 110735761 A CN110735761 A CN 110735761A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 167
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000013461 design Methods 0.000 title claims abstract description 11
- 238000012360 testing method Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006757 chemical reactions by type Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
- F03B15/02—Controlling by varying liquid flow
- F03B15/04—Controlling by varying liquid flow of turbines
- F03B15/06—Regulating, i.e. acting automatically
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention discloses axial flow water turbine water distribution device and a water turbine energy-saving design method, which belong to the field of hydroelectric generating set energy-saving design and comprise an axial flow water turbine, wherein the axial flow water turbine is arranged below a water turbine water distribution device, the tail part of the axial flow water turbine is provided with a tail water drain pipe, a multistage impeller of the water turbine is arranged in the axial flow water turbine and is used for improving the efficiency of the axial flow water turbine, the water turbine water distribution device comprises a plurality of water distribution movable blades, the water distribution movable blades are annularly arranged on the outer side of a main shaft of the water turbine, the water turbine water distribution device is connected with a speed regulator, the speed regulator is connected with a control cabinet, a gate is arranged between the upper part of the water turbine water distribution device and an upper reservoir, and when the hydroelectric generating.
Description
Technical Field
The invention relates to an axial flow type water turbine water distribution device and a water turbine energy-saving design method, and belongs to the field of hydroelectric generating set energy-saving design.
Background
The hydropower is clean energy, is renewable, pollution-free, low in operating cost, convenient for carrying out power peak regulation, and beneficial to improving the resource utilization rate and the comprehensive benefits of the economy and the society. Under the condition that the traditional energy of the earth is increasingly tense, all countries in the world generally preferentially develop hydropower and vigorously utilize the hydropower resources.
The hydraulic turbine is a power machine for converting the energy of water flow into rotary mechanical energy, and belongs to the turbine machinery in fluid machinery. In a hydropower station, water in an upstream reservoir is guided to a water turbine through a water guide pipe to push a water turbine runner to rotate so as to drive a generator to generate electricity. The water after doing work is discharged to the downstream through the tail water pipeline. The higher the water head and the larger the flow, the larger the output power of the water turbine is.
Water turbines can be divided into impulse turbines and reaction turbines according to the working principle. The runner of the impulse turbine rotates under the impact of water flow, the pressure of the water flow is unchanged in the working process, and the conversion of kinetic energy is mainly carried out; the runner of the reaction type water turbine rotates under the reaction force of water flow in water, and the pressure energy and the kinetic energy of the water flow are changed in the working process, but the pressure energy is mainly converted.
The mixed-flow water turbine is the most -generation water turbines used in the world, and the applicable water head range of the mixed-flow water turbine is very wide and is 5-700 meters, but the maximum water head range is 40-300 meters.
The hydroelectric generating set is huge in equipment and complex in structure, water needs to change direction and throttle for many times when entering the water turbine, enters the volute to prolong a flowing path, increases throttling loss and causes energy waste, so that an axial-flow water turbine water distribution device and a water turbine energy-saving design method are urgently needed to improve the energy utilization rate of the hydroelectric generating set and reduce the energy waste.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an axial flow water turbine water distribution device and a water turbine energy-saving design method.
The technical scheme adopted for solving the problems is that the axial flow water turbine water distribution device comprises an axial flow water turbine and is characterized in that the axial flow water turbine is mounted below a water turbine water distribution device, a tail water drain pipe is mounted at the tail part of the axial flow water turbine, a multi-stage impeller of the water turbine is arranged in the axial flow water turbine and used for improving the efficiency of the axial flow water turbine, the water turbine water distribution device comprises a plurality of water distribution movable blades which are annularly arranged on the outer side of a main shaft of the water turbine, the water turbine water distribution device is connected with a speed regulator, the speed regulator is connected with a control cabinet, and a gate is arranged between the upper part of the water turbine water distribution device and an upper reservoir.
, the water distribution blades are of a fan-shaped structure and are provided with 4 water distribution blades.
And , connecting the control cabinet with the test device.
energy-saving design method of water turbine is characterized in that the axial flow water turbine water distribution device is adopted, the process is that the control cabinet is operated, the speed regulator is used for controlling the water turbine water distribution device to be gradually opened, water enters the axial flow water turbine and flows through the multistage impellers of the water turbine, then the tail water drainage pipe is subjected to water meeting and the pressure is normal, the control cabinet is operated to control the speed regulator to gradually open the water turbine water distribution device, the axial flow water turbine is accelerated, the axial flow water turbine is connected to the grid, the load is carried to the rated value, the pressure of the tail water drainage pipe and the temperature and pressure of each auxiliary system of the axial flow water turbine are detected, and whether the performance of the axial flow water turbine.
Compared with the prior art, the invention has the advantages and effects of strong practicability, suitability for the hydropower industry, scientificity, capability of meeting the energy-saving requirement of a hydropower unit, universal applicability, capability of improving the energy utilization rate and economic benefit level of a hydropower station.
Drawings
Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a water distribution device of a water turbine according to an embodiment of the invention.
In the figure, an axial flow type water turbine 1, a tail water drain pipe 2, a water turbine multi-stage impeller 3, a water turbine water distribution device 4, a speed regulator 5, a control cabinet 6, a test device 7, a gate 8, an upper reservoir 9, a water distribution blade 10 and a water turbine main shaft 11.
Detailed Description
The present invention will now be described in further detail in by way of example with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limited by the following examples.
Referring to fig. 1 to 2, a axial flow turbine water distribution device in this embodiment includes an axial flow turbine 1, and is characterized in that the axial flow turbine 1 is installed below a turbine water distribution device 4, a tail water drain pipe 2 is installed at a tail portion of the axial flow turbine 1, a turbine multi-stage impeller 3 is arranged inside the axial flow turbine 1, the turbine multi-stage impeller 3 is used for improving efficiency of the axial flow turbine 1, the turbine water distribution device 4 includes a plurality of water distribution movable blades 10, the water distribution movable blades 10 are annularly arranged on an outer side of a turbine main shaft 11, the turbine water distribution device 4 is connected with a speed regulator 5, the speed regulator 5 is connected with a control cabinet 6, and a gate 8 is arranged between an upper portion of the turbine water distribution device 4 and.
In this embodiment, the water distribution blades 10 have a fan-shaped structure, and 4 water distribution blades 10 are provided.
In this embodiment, the control cabinet 6 is connected to the testing device 7, and both the control cabinet 6 and the testing device 7 are existing products.
The energy-saving design method of the water turbine comprises the following steps: the control cabinet 6 is operated, the water distribution device 4 of the water turbine is controlled to be gradually opened through the speed regulator 5, water enters the axial flow type water turbine 1 and flows through the multistage impeller 3 of the water turbine, and then the tail water drain pipe 2 meets water and has normal pressure; operating the control cabinet 6 to control the speed regulator 5 to gradually open the water distribution device 4 of the water turbine, accelerating the axial flow water turbine 1, connecting the axial flow water turbine 1 to the grid, carrying a load to a rated value, detecting the pressure of the tail water drain pipe 2 and the temperature and pressure of each auxiliary system of the axial flow water turbine 1; the performance of the axial flow water turbine water distribution device is tested by the test device 7 whether the axial flow water turbine water distribution device is in a good standby state.
Because of local head loss:
wherein: ζ is the local drag coefficient.
The more turns, the more reducing, and the more head loss.
Loss of on-way head:
the longer L, the greater the head loss along the way.
The higher the water head and the larger the flow, the larger the output power of the water turbine is. The more the local head loss is, the more the head loss along the way is, the lower the power of the unit is, and the lower the efficiency is.
In the embodiment, water enters from the upper part of the water distribution device 4 of the water turbine, the turning is minimum, the diameter change is minimum, and the path is shortest, so the head loss is minimum.
The test procedure was as follows:
before the test, a test switch is turned to a test position, a test entering function key is pressed, a confirmation key is pressed to enter the test, a tested valve is selected, a start button is pressed, a valve is closed to and then restored to the original opening, other valves are selected to carry out the test, and after the test, the test switch is turned to a normal position to complete the test.
And will be apparent to those skilled in the art from the foregoing description.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (4)
- The utility model provides a axial flow turbine water distribution device, including axial flow turbine (1), characterized by, install in the below of turbine water distribution device (4) axial flow turbine (1), tail water drain pipe (2) are installed to the afterbody of axial flow turbine (1), the inside of axial flow turbine (1) has arranged multistage impeller of hydraulic turbine (3), multistage impeller of hydraulic turbine (3) are used for improving the efficiency of axial flow turbine (1), turbine water distribution device (4) include a plurality of water distribution movable blades (10), water distribution movable blade (10) annular sets up the outside at hydraulic turbine main shaft (11), turbine water distribution device (4) are connected with speed regulator (5), speed regulator (5) are connected with switch board (6), be provided with floodgate (8) between the top of turbine device (4) and last reservoir (9).
- 2. Water distribution device for axial flow water turbines according to claim 1, characterized in that the distribution blades (10) are of a fan-shaped configuration and 4 distribution blades (10) are provided.
- 3. Water distribution installation for an axial flow water turbine according to claim 1, characterised in that the control cabinet (6) is connected to a test device (7).
- 4, water turbine energy-saving design method, characterized by using the axial flow water turbine water distribution device of any of claims 1-3, the process is that the control cabinet (6) is operated, the speed regulator (5) controls the water turbine water distribution device (4) to be gradually opened, water enters the axial flow water turbine (1) and flows through the multi-stage impeller (3) of the water turbine, then the tail water drain pipe (2) is in water-meeting and normal pressure, the control cabinet (6) is operated to control the speed regulator (5) to gradually open the large water turbine water distribution device (4), the axial flow water turbine (1) is accelerated, the axial flow water turbine (1) is connected to the grid and is loaded to the rated value, the pressure of the tail water drain pipe (2) and the temperature and pressure of each auxiliary system of the axial flow water turbine (1) are detected, and whether the performance of the axial flow water turbine water distribution device is in a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910984830.5A CN110735761A (en) | 2019-10-16 | 2019-10-16 | axial flow type water turbine water distribution device and water turbine energy-saving design method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910984830.5A CN110735761A (en) | 2019-10-16 | 2019-10-16 | axial flow type water turbine water distribution device and water turbine energy-saving design method |
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| CN110735761A true CN110735761A (en) | 2020-01-31 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2611623Y (en) * | 2002-05-20 | 2004-04-14 | 四川工业学院 | Shaft extension oblique flowing water-turbine |
| CN101915196A (en) * | 2010-05-24 | 2010-12-15 | 李延频 | Double-runner ultra-low specific speed axial flow hydraulic turbine for driving cooling tower fan |
| CN203548040U (en) * | 2013-10-30 | 2014-04-16 | 四川省内江蜀源水轮机有限公司 | Novel axial-flow turbine |
| CN105888914A (en) * | 2016-04-01 | 2016-08-24 | 镇江能远水力科技有限公司 | Small household vertical pipeline axial flow type water turbine |
| CN208950760U (en) * | 2018-09-20 | 2019-06-07 | 福州方圆电机有限公司 | A kind of double runner packaged axial flow formula hydraulic turbine |
| CN211474322U (en) * | 2019-10-16 | 2020-09-11 | 华电电力科学研究院有限公司 | Water distribution device of axial flow water turbine |
-
2019
- 2019-10-16 CN CN201910984830.5A patent/CN110735761A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2611623Y (en) * | 2002-05-20 | 2004-04-14 | 四川工业学院 | Shaft extension oblique flowing water-turbine |
| CN101915196A (en) * | 2010-05-24 | 2010-12-15 | 李延频 | Double-runner ultra-low specific speed axial flow hydraulic turbine for driving cooling tower fan |
| CN203548040U (en) * | 2013-10-30 | 2014-04-16 | 四川省内江蜀源水轮机有限公司 | Novel axial-flow turbine |
| CN105888914A (en) * | 2016-04-01 | 2016-08-24 | 镇江能远水力科技有限公司 | Small household vertical pipeline axial flow type water turbine |
| CN208950760U (en) * | 2018-09-20 | 2019-06-07 | 福州方圆电机有限公司 | A kind of double runner packaged axial flow formula hydraulic turbine |
| CN211474322U (en) * | 2019-10-16 | 2020-09-11 | 华电电力科学研究院有限公司 | Water distribution device of axial flow water turbine |
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