CN102418646A - Method for improving rotating wheel of low-water-head hydropower station axial flow fixed propeller type set - Google Patents
Method for improving rotating wheel of low-water-head hydropower station axial flow fixed propeller type set Download PDFInfo
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- CN102418646A CN102418646A CN2012100001895A CN201210000189A CN102418646A CN 102418646 A CN102418646 A CN 102418646A CN 2012100001895 A CN2012100001895 A CN 2012100001895A CN 201210000189 A CN201210000189 A CN 201210000189A CN 102418646 A CN102418646 A CN 102418646A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 238000004088 simulation Methods 0.000 claims abstract description 8
- 238000003754 machining Methods 0.000 claims abstract description 6
- 238000013461 design Methods 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000007634 remodeling Methods 0.000 claims description 8
- 230000010349 pulsation Effects 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 4
- 230000000052 comparative effect Effects 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000004575 stone Substances 0.000 description 12
- 239000004744 fabric Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005206 flow analysis Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention relates to a method for improving a rotating wheel of a low-water-head hydropower station axial flow fixed propeller type set. The method comprises the following steps of: (1) designing and machining a full-simulation model device for an original power station hydraulic turbine; (2) designing and machining an original rotating wheel model and designing more than one novel model rotating wheels; (3) performing comparison tests on the original rotating wheel model and the novel rotating wheel models on the full-simulation model device of the original power station by using a high-water-head hydropower mechanical model testbed, and summing data of the efficiency and the stability of the novel rotating wheels; and (4) testing the novel model rotating wheels in a full-simulation channel, and checking and accepting the rotating wheels so as to determine to produce real rotating wheels of the hydraulic turbine through the novel model rotating wheels. Rational and advanced technical parameters of the novel rotating wheels are determined by designing the original rotating wheel model and the novel designed model rotating wheels through the test in the full-simulation channel; the efficiency and the stability of the novel rotating wheels are improved remarkably; the technical parameters are used as basis for manufacturing a real turbine, so that equipment is reformed, the property of the original equipment is improved, and the service life of the original equipment is prolonged.
Description
Technical field
The present invention relates to a kind of equipment for hydroelectric station remodeling method, promptly the low head hydropower station axial flow is decided oar formula unit runner remodeling method.
Background technique
In the prior art; Red stone power station, Jilin unit is that the 50MW axial flow that Harbin Electric Machine Co., Ltd. produces is decided oar formula unit; Be that the maximum axial flow of China is decided oar formula unit, model is: ZDA190-LH-600 (new runner model DA944-LH-600), unit put into operation nearly so far 20 years.Ended by 2005, crack problem has appearred in 4 units in various degree.Initial analysis is thought, owing to the restriction of design and manufacture level at that time, adds the reasons such as vibration of unit, and runner bucket is to the life-span, and it is imperative that blade is transformed, and needs to change runner.
Summary of the invention
The objective of the invention is provides a kind of correctional effect good to above-mentioned deficiency, and the feasible low head hydropower station axial flow of method is decided oar formula unit runner remodeling method.
Technical solution of the present invention is: the step that the low head hydropower station axial flow is decided oar formula unit runner remodeling method is following:
(1) the full simulation model device of the original power station of Design and Machining water turbine;
(2) above model runner of former rotary wheel model of Design and Machining and new design;
(3) utilize high head hydraulic machinery rig for model test, on the model equipment of the full simulation in former power station, carry out former rotary wheel model and new rotary wheel model comparative trial respectively; Sum up new runner efficiency, stable aspect data;
(4) runner that newly designs a model is tested under full analog channel, and carried out an acceptance inspection, confirm to produce water turbine prototype runner with the runner that newly designs a model.
The prototype rotary wheel model drunk the runner that newly designs a model all carries out efficient, tests such as characteristic, cavitation, pressure pulsation fly to escape.
Use Tascflow software the former rotary wheel model and the runner that newly designs a model are carried out the CFD analysis, constantly be optimized design.
Rotary wheel of water turbine transformation total principle in red stone power station is: on the basis that guarantees set steady property and reliability, consider to improve the efficient and the power of unit.The basic orientation of transforming is: under the constant situation of runner, only change runner, whether fixed guide vane comes to have the part to repair necessity of type surely according to the result of spiral case flow analysis.
Advantage of the present invention is: through designing former rotary wheel model and the runner that newly designs a model; Under full analog channel, make an experiment, confirm the technical parameter that new runner is reasonable, advanced, no matter efficient still is stable aspect to new runner all improves significantly; Make foundation as the turbine prototype; Not only can satisfy Plant reconstruction plant modernization, but also improve the existing equipment performance, prolong working life.
To combine embodiment that mode of execution of the present invention is described in further detail below.
Embodiment
The report of Test Example 1-runner optimized Selection model test
Unit is accomplished in test: Harbin Electric Machine Co., Ltd.
1, test objective: breathe out electricity and reset the model equipment that meter has been processed and simulate entirely in red stone power station; Carried out the comprehensive comparative trial of prototype model runner with the runner that newly designs a model; Through comprehensive model test and with the contrast of prototype model runner; No matter efficient still is stable aspect to the runner that newly designs a model all improves significantly, and meets the requirements.
2, content of the test: the model preliminary test is carried out at Harbin Electric Machine Co., Ltd.'s Research Institute of Large Electrical Machinery water turbine research laboratory high head test II platform, and prototype runner and new design runner have all carried out efficient, tests such as characteristic, cavitation, pressure pulsation fly to escape.
3, model test apparatus major parameter:
Runner model: the prototype model runner and the runner that newly designs a model
Runner nominal diameter: D1=400mm
Runner bucket number: 5
Fixed guide vane number: 16
Movable guide vane number: 32
Movable guide vane height: b0=0.4D1
High pressure side pressure measurement cross-sectional area: A1=0.52747m2
Low voltage side pressure measurement cross-sectional area: A2=0.437116m2
4, model test result:
A, efficiency test: test head is 8m.Efficiency test is with the combined characteristic of rating model water turbine; Comprise in the whole operating head polishing scopes of prototype water turbine; Guide vane opening is from the isoefficiency curve of the pairing specific discharge of 16mm to 40mm (guide vane opening is differential to be 2mm), unit speed, and the acquisition time of each operating point is 60s.The unit speed scope of efficiency test is from 100r/min to 200r/min, and test is to be to carry out under the condition of constant waiting opening and head.Test result; The prototype model runner: optimum operating condition point is: the n11=131r/minQ11=1.320m3/s η=88.2% runner optimum operating condition point that newly designs a model is: n11=128r/minQ11=1.298m3/s η=90.04%.Can find out from comparative result: new runner efficiency surpasses the prototype model runner comprehensively, and optimum efficiency reaches 90.04%, has improved 1.84% than A190 optimum efficiency.
B, runaway speed characteristic test: according to prototype range of operation decision operating condition of test point; Data acquisition time is that 30s. runaway speed characteristic test is under the power measurer rotating speed is the condition of constant (1200r/min), to carry out; Make the power measurer output torque be approximately zero through regulating test head; Gather several points, confirm then the guide vane opening in the test result, runaway speed and the discharge relation that flies to escape to be drawn on the curve runaway speed value.Fly the characteristic of escaping in the hope of water turbine, in order to the runaway speed guarantee value of check prototype water turbine.Test will cover the operation stator full gate scope of prototype.Test result: according to the runner test result that newly designs a model; Aperture when the maximum head nominal output is 28mm; Through converting when maximum head HP=25.6m; The maximum runaway speed value of prototype is 191.4r/min, and is suitable with the prototype model runner, satisfies the requirement that is not more than 220r/min of transforming regulation.
C, cavitation test: test head is 8m.Data acquisition time is 30s.Cavitation test is under the speed conditions of order position; The method that changes cavitation coefficient, cavitation factor, Toma coefficient through the pressure that changes tail tank is carried out; Promptly tail tank is progressively changed degree of vacuum; Make runner generation cavitation (perhaps reaching till the limit of vacuum equipment), the relation with cavitation coefficient, cavitation factor, Toma coefficient and efficient, moment, specific discharge is drawn on same the curve then, and the critical cavitation coefficient characteristic curve such as draws.Measure the given corresponding critical cavitation coefficient of each operating conditions.Test result: the runner water turbine rated head nominal output that newly designs a model operating mode critical cavitation coefficient is 0.32; Cavitation safety coefficient 1.74; (prototype model runner nominal output operating mode critical cavitation coefficient is 0.34 to be superior to the prototype model runner; What cavitation safety coefficient 1.64), satisfy to transform require is not less than 1.4 index.
D, pressure pulsation test: test head is 8m.Test is in the whole operating head polishings of water turbine and the scope of exerting oneself; Unloaded, fly under ease, each head different load and the tailwater level under the plant cavitation coefficient condition of range of operation power station; Pressure pulsation amplitude and frequency that mensuration is relevant with flow instability or draft tube, measuring point spiral case inlet, the Taper Pipe upper reaches, Taper Pipe downstream, Taper Pipe-X partially-Y locates for 20 °.Amplitude of pressure fluctuation adopts 97% confidence coefficient to follow the example of.Test result: the runner amplitude of pressure fluctuation that newly designs a model is 23.65% at the maximum value width of cloth of hydraulic turbine operation scope endosiphuncular tube downstream part; Obviously reduce (prototype model runner amplitude of pressure fluctuation is 35.66% at the maximum value width of cloth of hydraulic turbine operation scope endosiphuncular tube downstream part) than prototype model runner, satisfied transformation is no more than 30% requirement.
E, blade separation of flow observation experiment: to prototype model runner prototype model runner, newly the runner that designs a model has carried out the observation of the blade separation of flow at typical condition; Imaging observation is the result show; The runner that newly designs a model is compared with prototype model runner runner; Vacuum side of blade separation of flow degree under corresponding working condition obviously alleviates, and vibration and noise reduce significantly.
F, dimensional gaughing: model channel size and shape have been carried out the inspection affirmation, and the deviation of testing result and design load satisfies standard-required.
Conclusion:
(1) optimum efficiency of new runner reaches 90.04%, has improved 1.84% than former runner optimum efficiency.
(2) according to new runner runaway speed test result, the maximum runaway speed that is converted into prototype is 191.4r/min, and is suitable with former runner, the requirement that is not more than 220r/min that meets the demands.
(3) new runner water turbine rated head nominal output operating mode critical cavitation coefficient is 0.32; Cavitation safety coefficient 1.74; Be superior to former runner (former runner nominal output operating mode critical cavitation coefficient is 0.34, cavitation safety coefficient 1.64), satisfy 1.4 the index of being not less than of red stone transformation requirement.
(4) new runner amplitude of pressure fluctuation is 23.65% at the maximum value width of cloth of hydraulic turbine operation scope endosiphuncular tube downstream part; Obviously reduce (former runner amplitude of pressure fluctuation is 35.66% at the maximum value width of cloth of hydraulic turbine operation scope endosiphuncular tube downstream part) than former runner, that satisfies that red stone transforms that agreement mentions is no more than 30% requirement.
(5) the imaging observation result shows: new runner is compared with former runner runner, and the vacuum side of blade separation of flow degree under corresponding working condition obviously alleviates, and vibration and noise reduce significantly.
Think and to produce red stone water turbine prototype runner by new rotary wheel model runner.
The red stone of Test Example 2-power station runner CFD analysis report
This time the new runner finally designed of red stone Research for reconstruction is analyzed from CFD, its runner bucket just, the backside pressure more even distribution, velocity distribution in the runner channel, streamline distribution are more reasonable, numerical value efficient improves comprehensively.From test result, requirement, particularly stability indicator that new runner each item performance index meet red stone power plant retrofit are fully compared with the former runner of red stone has had bigger improvement, has reached the main target of red stone power plant retrofit.New runner can be applied in the red stone power plant retrofit fully, and will aspect waterpower, the raising to whole set steady property lay a good foundation.
Claims (3)
1. a low head hydropower station axial flow is decided oar formula unit runner remodeling method, it is characterized in that step is following:
(1) the full simulation model device of the original power station of Design and Machining water turbine;
(2) the former rotary wheel model of Design and Machining and the runner that newly designs a model;
(3) utilize high head hydraulic machinery rig for model test, on the model equipment of the full simulation in former power station, carry out former rotary wheel model and new rotary wheel model comparative trial respectively; Sum up new runner efficiency, stable aspect data;
(4) the runner test that newly designs a model is carried out an acceptance inspection, confirm to produce water turbine prototype runner with the runner that newly designs a model.
2. decide oar formula unit runner remodeling method according to the described low head hydropower station axial flow of claim 1, it is characterized in that to the prototype rotary wheel model drink that the runner that newly designs a model all carries out efficient, the characteristic that flies to escape, cavitation, pressure pulsation test.
3. decide oar formula unit runner remodeling method according to claim 1 or 2 described low head hydropower station axial flows, it is characterized in that using Tascflow software the former rotary wheel model and the runner that newly designs a model are carried out the CFD analysis, constantly be optimized design.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100001895A CN102418646A (en) | 2012-01-01 | 2012-01-01 | Method for improving rotating wheel of low-water-head hydropower station axial flow fixed propeller type set |
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| CN2012100001895A CN102418646A (en) | 2012-01-01 | 2012-01-01 | Method for improving rotating wheel of low-water-head hydropower station axial flow fixed propeller type set |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220702A (en) * | 2019-10-28 | 2020-06-02 | 大唐水电科学技术研究院有限公司 | Cavitation erosion monitoring and evaluating method for water turbine |
| CN112792521A (en) * | 2021-01-04 | 2021-05-14 | 刘建波 | Hydraulic turbine set rotor transformation method |
Citations (2)
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|---|---|---|---|---|
| JP2004076637A (en) * | 2002-08-14 | 2004-03-11 | Hashimoto Sangyo Kk | Water supply and discharge generator and water supply and discharge generation system |
| CN201891547U (en) * | 2010-12-06 | 2011-07-06 | 中国海洋大学 | Axial flow paddle type water turbine |
-
2012
- 2012-01-01 CN CN2012100001895A patent/CN102418646A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004076637A (en) * | 2002-08-14 | 2004-03-11 | Hashimoto Sangyo Kk | Water supply and discharge generator and water supply and discharge generation system |
| CN201891547U (en) * | 2010-12-06 | 2011-07-06 | 中国海洋大学 | Axial flow paddle type water turbine |
Non-Patent Citations (4)
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| 敏政等: "小型轴流定桨式水轮机的技术改造", 《甘肃科学学报》 * |
| 李鹏吉等: "白山发电厂机组转轮改造研究", 《电网与清洁能源》 * |
| 杨咸虎、高连伟: "红石电站水轮机转轮裂纹问题的分析与处理", 《水轮发电机组稳定性技术研讨会论文集》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220702A (en) * | 2019-10-28 | 2020-06-02 | 大唐水电科学技术研究院有限公司 | Cavitation erosion monitoring and evaluating method for water turbine |
| CN111220702B (en) * | 2019-10-28 | 2023-01-13 | 大唐水电科学技术研究院有限公司 | Cavitation erosion monitoring and evaluating method for water turbine |
| CN112792521A (en) * | 2021-01-04 | 2021-05-14 | 刘建波 | Hydraulic turbine set rotor transformation method |
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| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. STATE GRID XINYUAN WATER Effective date: 20121105 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20121105 Address after: 132400, No. 274, Huadian Avenue, Huadian, Jilin, Jilin Applicant after: Baishan Power Plant Applicant after: State Grid Corporation of China Applicant after: State Grid Xinyuan Hydropower Co., Ltd. Address before: 132400, No. 274, Huadian Avenue, Huadian, Jilin, Jilin Applicant before: Baishan Power Plant |
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| C12 | Rejection of a patent application after its publication | ||
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Application publication date: 20120418 |