CN203962464U - The mixed flow pump turbine runner of decline slant height flanging - Google Patents
The mixed flow pump turbine runner of decline slant height flanging Download PDFInfo
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- CN203962464U CN203962464U CN201420293965.XU CN201420293965U CN203962464U CN 203962464 U CN203962464 U CN 203962464U CN 201420293965 U CN201420293965 U CN 201420293965U CN 203962464 U CN203962464 U CN 203962464U
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- 230000007423 decrease Effects 0.000 title claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000010349 pulsation Effects 0.000 abstract description 12
- 238000013461 design Methods 0.000 abstract description 10
- 230000002441 reversible effect Effects 0.000 description 5
- 230000008676 import Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001672694 Citrus reticulata Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009798 acute exacerbation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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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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Abstract
The utility model belongs to hydro-electric power generating equipment field, relates in particular to the mixed flow pump turbine runner of a kind of decline slant height flanging, and runner is made up of crown, lower ring and 7 or 9 blades.The hot side of blade is positioned at a cylndrical surface, and the cornerite of blade hot side from lower ring to crown is θ, and the inclination angle after blade hot side launches in cylndrical surface is β, gets β angle for negative, tilts to water turbine sense of rotation, and its value can reach 30-60 °.There is the runner of optimal design under the condition of large negative incidence in runner hot side, meeting under water turbine and pump operating condition under hydraulic efficiency and cavitation Practical Project requirement prerequisite, can significantly reduce the pressure pulsation of unit, especially the pressure pulsation of Wu Ye district and outlet of rotary wheel draft tube inlet between stator and runner when water turbine operating mode sub load, and fluctuation pressure in pump operating condition Xia Wuye district and draft tube; Improve " S " characteristic of pump turbine operating mode simultaneously.
Description
Technical field
The utility model belongs to hydro-electric power generating equipment field, relates in particular to the mixed flow pump turbine runner of a kind of decline slant height flanging.
Background technique
Pumped storage power station owing to thering is good peak regulation, fill out paddy, the function such as frequency modulation, phase modulation, emergency duty and black startup, be the inevitable choice of electric power industry development.The heart of pumped storage power station is the pump turbine of pumped storage unit, and this pump turbine runner needs reversible operation conventionally, and operating conditions is changeable, internal flow characteristics is complicated.Along with improving constantly of pumped storage technology, Reversible Pump-Turbine is just tending to high head, large capacity and speed up development.
China's electric structure is difficult within one quite long period taking coal electricity as main general layout change, and electric power resource has mal-distribution form on the whole.In order to distribute resource, the promotion energy-saving and emission-reduction of electric power system, the economic benefit of performance pumped storage power station rationally.High head, the jumbo pumped storage power station developing direction that is inevitable.High head, jumbo pump turbine runner diameter is large, flow velocity is high, specific speed is low.Owing to there is larger disc friction losses, the hydraulic efficiency of unit under water turbine and two operating modes of water pump all can reduce.Because water flow inside flow velocity is high, especially, under the operating conditions of water turbine sub load, runner import there will be strong sound to interfere, and draft tube import current exist rotation, and this can cause strong pressure pulsation in Wu Ye district and draft tube.In addition, unit cavitation performance can acute exacerbation.
At present, China is at the middle high head (250-500m) of building He will put into operation, in the pumped storage power station of large capacity (200-350MW), the head luffing in a lot of power stations is larger.Therefore, under water turbine operating mode, runner will operate under different head sections, inevitably departs from optimum operating condition, and the pressure pulsation in Zhe Huishiwu leaf district and draft tube is more violent, worsens the cavitation performance of runner simultaneously.More seriously, because head luffing is large, the range of operation of requirement broadens, and may enter in district of irregular operation district " S ", and unit operation can be more unstable, and brings great difficulty can to unit grid-connected.
Reversible Pump-Turbine will be taken into account two kinds of operating modes of pump turbine, make it be issued to high efficiency at two kinds of different operating conditionss.What is more important will ensure that it is wanting stable operation in efficient operation in broad range of operation, Wu Ye district between stator and runner, and pressure pulsation in draft tube meets certain standard.
Model utility content
For hydraulic efficiency and cavitation in range of operation under water turbine and pump operating condition all meet under Practical Project requirement prerequisite, significantly reduce the pressure pulsation of unit, especially the pressure pulsation of Wu Ye district and outlet of rotary wheel draft tube inlet between stator and runner when water turbine operating mode sub load, improve " S " characteristic of pump turbine operating mode simultaneously, the mixed flow pump turbine runner of a kind of decline slant height flanging the utility model proposes, is mainly made up of from top to bottom successively 1,7 of crowns or 9 blades 3 and lower ring 2;
Wherein, blade hot side 4 is positioned at a cylndrical surface, and the cornerite of definition blade hot side 4 from lower ring 2 to crown 1 is θ, the inclination angle after blade hot side 4 launches in cylndrical surface
when blade hot side 4 is tilted to water pump sense of rotation, β angle is for just, and while inclination to water turbine sense of rotation, β angle is for negative, and choosing β is negative incidence; Get cornerite γ=15-30 °, choose hot side diameter D
dafter hot side height B, can be calculated negative incidence β, its value can reach 60 °, meets the application of head section H=100-500 rice pumped storage unit, and applicable specific speed scope is
Wherein D
dfor hot side diameter, B is hot side height, and Ds is step-down side diameter, and θ is that under hot side, ring is to the cornerite of crown, and β is the inclination angle of blade hot side while launching on cylndrical surface, n
sfor specific speed, unit is m, m
3/ s, Q is the flow under pump design conditions, H is the lift under pump design conditions.
The beneficial effects of the utility model are that the existence of the large negative incidence of runner bucket hot side place, has expanded distance between movable guide vane and runner.Under water turbine operating mode, reduce the impact loss of current, improve the flowing state in Wu Ye district, reduce pressure pulsation.Under pump operating condition, hot side is flowed and broaden simultaneously, flow unobstructed, go out stream evenly, improve the efficiency of runner.
Brief description of the drawings
Fig. 1 is the figure of runner radially projecting;
Fig. 2 is runner axial section;
Fig. 3 is runner hot side blade negative incidence schematic diagram;
Fig. 4 is blade axial plane schematic diagram, has wherein drawn the signal shape of aerofoil profile on meridian streamline;
Wherein: 1-crown, under 2-, encircle, 3-blade, the hot side of 4-blade, 5-blade step-down side, 6-blade crown aerofoil profile, encircles aerofoil profile under 7-blade, aerofoil profile in the middle of 8-blade.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is further described.
As depicted in figs. 1 and 2, a kind of mixed flow pump turbine runner, comprises crown 1, lower ring 2 and multiple blade 3.Blade 3 is generally 7, can be 9 when ultrahigh-water head.Runner bucket hot side 4 is positioned at a cylndrical surface, is defined as θ=15-30 ° from lower ring 2 to the wrap angle of crown 1.As shown in Figure 3, after blade hot side 4 launches, on cylndrical surface, be a straight line, so hot side inclination angle can be by the diameter D of blade height B and hot side
dcalculate.Inclination angle after blade hot side 4 launches in cylndrical surface
hot side is to tilting to water turbine sense of rotation, and β angle is for negative.S is the length after blade hot side launches on cylndrical surface.In Fig. 1, the invisible part of partial blade dots.
In the Hydraulic Design of the runner of mixed flow pump turbine, first provide according to the design parameter in power station and statistics two key dimensions that represent runner feature: hot side and step-down side diameter, D
dand Ds.Then determine axial plane shape, make the Flow area on axial plane form a dull smoothed curve by step-down side to hot side.But what really reflect runner bucket runner intensity of variation is the Spatial Variation of blade passage.Therefore, the reverse caster shape with wide-angle is made in hot side, note optimizing low pressure and become opening and inclination angle, makes pump operating mode have good Cavitation Characteristics, make water turbine operating mode have enough discharge capacity simultaneously, ensure that efficiency and the cavitation performance under water turbine and pump operating condition reaches designing requirement.
According to the axial plane shape of the outstanding mixed flow pump turbine runner of the performance of moving in the design parameter in power station and Practical Project, can determine the flow channel of axial plane shown in Fig. 3, and provide runner hot side diameter D
dwith step-down side diameter D
s, and hot side exit width B.Determine after the shape of runner hot side blade, utilize Cavilalion factor design, calculate flowing dynamics (CFD) numerical simulation and multi-objective genetic algorithm (MOGA) is optimized design to the blade of mixed flow pump turbine shown in Fig. 3, can obtain all excellent mixed flow Reversible Pump-Turbine runners as shown in Figure 1 of the two-way operating mode efficiency of water turbine and water pump.
The utility model working principle is as follows:
The hot side of pump-turbine runner is the import of water turbine, and water delivery side of pump is generally positioned at cylndrical surface.The high limb of traditional mixed flow pump turbine runner is made vertical sometimes, sometimes make and have certain negative incidence, but negative incidence is defined as 15-25 °.Therefore, gap between traditional mixed flow pump turbine runner outer rim and stator is very little, from stator flow impact out to runner bucket, or or runner flow impact out to the pressure oscillation forming on stator, be the main source of water turbine operating mode and pump operating condition pressure pulsation.
Blade hot side is made to the shock that large tilted shape can dispersing water flow, and pulsation eases off the pressure.In addition, in the time of water turbine operating mode, there is range of instability during in zone of high pressure, adopt the blade with back rake angle to contribute to eliminate this unstability.Under pump operating condition, large negative incidence broadens hot side runner, has effectively ensured the unobstructed of runner channel.By optimal design, runner is more reasonable in the leaf distortion of step-down side, make pump become a mandarin and water turbine go out stream more even, also can reduce loss coefficient, guaranteed efficiency.
According to design proposal, process the pump turbine model runner of 60 ° of negative incidences of hot side, it has been carried out to model test.Experiment results proved meets under technical requirements prerequisite in the index such as efficiency, cavitation, has significantly reduced pressure pulsation.In stable operation district, under pump operating condition, in draft tube and after stator, before runner, be respectively 2% and 6% without the interval pressure pulsation dulble vibration amplitude of leaf value; Under water turbine operating mode, above-mentioned numerical value is respectively 6% and 12%.
The above; it is only preferably embodiment of the utility model; but protection domain of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; the variation that can expect easily or replacement, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (2)
1. the mixed flow pump turbine runner of decline slant height flanging, is characterized in that, is mainly made up of successively from top to bottom 1,7 of crowns or 9 blades 3 and lower ring 2;
Wherein, blade hot side 4 is positioned at a cylndrical surface, and the cornerite of definition blade hot side 4 from lower ring 2 to crown 1 is θ, the inclination angle after blade hot side 4 launches in cylndrical surface
Wherein D
dfor hot side diameter, B is hot side height, and θ is that under hot side, ring is to the cornerite of crown, and β is the inclination angle of blade hot side 4 while launching on cylndrical surface.
2. the mixed flow pump turbine runner of decline slant height according to claim 1 flanging, it is characterized in that, described blade hot side 4 is positioned at a cylndrical surface, and tilts to water turbine direction, the inclination angle of definition blade hot side 4 on the cylndrical surface of launching is for negative, and its value reaches 25-60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420293965.XU CN203962464U (en) | 2014-06-04 | 2014-06-04 | The mixed flow pump turbine runner of decline slant height flanging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420293965.XU CN203962464U (en) | 2014-06-04 | 2014-06-04 | The mixed flow pump turbine runner of decline slant height flanging |
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| Publication Number | Publication Date |
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| CN203962464U true CN203962464U (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420293965.XU Expired - Lifetime CN203962464U (en) | 2014-06-04 | 2014-06-04 | The mixed flow pump turbine runner of decline slant height flanging |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143455A (en) * | 2017-05-15 | 2017-09-08 | 中国水利水电科学研究院 | It is a kind of to mitigate the method that mixed flow pump turbine endangers without the pressure fluctuation of leaf area |
| CN107917099A (en) * | 2017-12-11 | 2018-04-17 | 江苏大学 | A kind of centrifugal pump impeller waterpower variant design method |
| CN108005948A (en) * | 2017-11-06 | 2018-05-08 | 大连理工大学 | Hydraulic model and water passage for large pressurized water reactor power station core main pump |
| CN108691717A (en) * | 2017-04-11 | 2018-10-23 | 许昌义 | The Francis turbine of double runner |
| CN110439722A (en) * | 2019-07-05 | 2019-11-12 | 清华大学 | A kind of wear-resistant Francis turbine adapting to high water head, high revolving speed and high sediment concentration |
| CN113969855A (en) * | 2021-10-15 | 2022-01-25 | 清华大学 | Blade modification method for inhibiting working condition hump of water pump turbine pump |
| CN114626159A (en) * | 2022-03-24 | 2022-06-14 | 西安理工大学 | Novel load distribution-based bidirectional through-flow type runner blade anti-problem design method |
-
2014
- 2014-06-04 CN CN201420293965.XU patent/CN203962464U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691717A (en) * | 2017-04-11 | 2018-10-23 | 许昌义 | The Francis turbine of double runner |
| CN108691717B (en) * | 2017-04-11 | 2020-10-09 | 福州偌晟科技有限公司 | Mixed-flow water turbine with double rotating wheels |
| CN107143455A (en) * | 2017-05-15 | 2017-09-08 | 中国水利水电科学研究院 | It is a kind of to mitigate the method that mixed flow pump turbine endangers without the pressure fluctuation of leaf area |
| CN108005948A (en) * | 2017-11-06 | 2018-05-08 | 大连理工大学 | Hydraulic model and water passage for large pressurized water reactor power station core main pump |
| CN107917099A (en) * | 2017-12-11 | 2018-04-17 | 江苏大学 | A kind of centrifugal pump impeller waterpower variant design method |
| CN107917099B (en) * | 2017-12-11 | 2019-08-02 | 江苏大学 | A kind of centrifugal pump impeller waterpower variant design method |
| CN110439722A (en) * | 2019-07-05 | 2019-11-12 | 清华大学 | A kind of wear-resistant Francis turbine adapting to high water head, high revolving speed and high sediment concentration |
| CN110439722B (en) * | 2019-07-05 | 2020-06-23 | 清华大学 | Wear-resistant mixed-flow water turbine suitable for high water head, high rotating speed and high sand content |
| CN113969855A (en) * | 2021-10-15 | 2022-01-25 | 清华大学 | Blade modification method for inhibiting working condition hump of water pump turbine pump |
| CN113969855B (en) * | 2021-10-15 | 2022-08-02 | 清华大学 | Blade modification method for inhibiting working condition hump of water pump turbine pump |
| CN114626159A (en) * | 2022-03-24 | 2022-06-14 | 西安理工大学 | Novel load distribution-based bidirectional through-flow type runner blade anti-problem design method |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141126 |
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| CX01 | Expiry of patent term |