CN107503874B - Tubular turbine Parameter Calculation method - Google Patents
Tubular turbine Parameter Calculation method Download PDFInfo
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- CN107503874B CN107503874B CN201710724349.3A CN201710724349A CN107503874B CN 107503874 B CN107503874 B CN 107503874B CN 201710724349 A CN201710724349 A CN 201710724349A CN 107503874 B CN107503874 B CN 107503874B
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- 238000004364 calculation method Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
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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
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/04—Machines or engines of reaction type; Parts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines
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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)
- Control Of Water Turbines (AREA)
Abstract
The present invention relates to the power station hydraulic turbines, disclose a kind of tubular turbine Parameter Calculation method, and realization calculates tubular turbine basic parameter.The calculative tubular turbine basic parameter of the present invention includes specific speed ns, unit speed n11With specific discharge Q11, the method comprise the steps that determining the rated head of tubular turbine to be calculated, the rated head is denoted as Hr；Determine that the maximum application head of tubular turbine to be calculated, the maximum application head are denoted as Hmax, and judge HmaxLocating range；According to HmaxThe calculation formula of corresponding range calculates basic parameter, formula are as follows: work as HmaxWhen≤20m,Q11=2.4072Ln (ns)-13.617；Work as HmaxWhen > 20m,Q11=2.6621Ln (ns)-15.396.The present invention is suitable for tubular turbine.
Description
Technical field
The present invention relates to the power station hydraulic turbines, in particular to tubular turbine Parameter Calculation method.
Background technique
The hydraulic turbine refers to the mechanical energy that the mechanical energy of water flow is converted to runner in power station, overcomes runner and main shaft respectively
The machine planting resistance and continuously running, referred to as " heart " in power station, the reasonable selection of parameter is to hydroelectric project
Initial investment and after putting into operation the performance of economy of power plant benefit have very important effect, be hydroelectric project design it is important in
Hold.
Hydraulic turbine specific speed nsIt is to measure hydraulic turbine energy response, Cavitation Characteristics, operation stability and economy and elder generation
Into the composite target of property.It improves specific speed and has to hydraulic turbine energy response, reduction unit cost and workshop construction investment is improved
It is significant；But the raising of specific speed is again by factors such as hydraulic turbine intensity, cavitation performance, sand erosion and operation stabilities
Restriction.Therefore, specific speed n how is reasonably determinedsIt is very important content in hydroelectric project design.By calculation formulaKnow, since the variation range of efficiency eta is limited, the η of tubular turbine is generally 88%~93%, only
Have as unit speed n11With specific discharge Q11When Proper Match, most suitable specific speed n can be just obtainedsValue and the hydraulic turbine are comprehensive
Energy.
It is with the immediate implementation that solves the above problems of the present invention at present: in order to acquire hydraulic turbine basic parameter -- ratio
Revolving speed ns, unit speed n11With specific discharge Q11, usually there are two types of evaluation methods.Method one: if in the hydroelectric project of design, water
The parameters such as turbine head, power output are identical or close as the turbine parameter manufactured and designed, then utilize existing model runner parameter
Hydraulic turbine basic parameter is estimated with combined characteristic.Since the evaluation method is to be based on a certain existing model runner data,
It is limited by technical conditions at that time, is generally difficult to do runner characteristic comprehensive, deep experimental study, thus the water wheels estimated
Machine specific speed ns, unit speed n11With specific discharge Q11It is generally difficult to meet new hydroelectric project requirement；It is especially medium-sized or have
The hydroelectric project of particular/special requirement usually requires that actual conditions and service requirement according to engineering, grinds with new technology developments such as CFD
Make new runner.Method two: when not suitable model runner data, then hydraulic turbine basic parameter is estimated by statistical formula.By
It is that hydraulic turbine basic parameter is estimated by statistical formula in the evaluation method, current this statistical formula is more, since each statistics is public
It is a certain head section before turbine parameter sample data is the 1970s and 1980s in last century based on formula or a certain
Specific speed nsRange, it has some limitations, same hydroelectric project is different with the result that different statistical formulas is estimated, has
It is a little even to differ larger, it can not correctly choose.Because the method one, two is unable to satisfy hydroelectric project to new technology, new material, new
The requirement of the continuous developments such as technique, new construction, the hydraulic turbine specific speed n estimateds, unit speed n11With specific discharge Q11Generally
Also it is difficult to meet new hydroelectric project requirement.
The present invention collect, arrange home and abroad in the past 30 years a large amount of operational excellence bulb-type hydraulic generating set money
On the basis of material, using principle of least square method, sample data is done with a large amount of turbine parameter, regression calculation obtains new water
Turbine Parameter Calculation formula obtains reasonable hydraulic turbine specific speed ns, unit speed n11With specific discharge Q11Calculated value, with
Meet new hydroelectric project requirement.
Summary of the invention
The technical problem to be solved by the present invention is a kind of tubular turbine Parameter Calculation method is provided, to through-flow
Formula hydraulic turbine basic parameter is calculated.
To solve the above problems, the technical solution adopted by the present invention is that: tubular turbine Parameter Calculation method, packet
Include following steps:
A. determine that the rated head of tubular turbine to be calculated, the rated head are denoted as Hr；
B. determine that the maximum application head of tubular turbine to be calculated, the maximum application head are denoted as Hmax, and judge
HmaxLocating range；H in the present inventionmaxRange locating for possible shares Hmax≤20m、HmaxTwo groups of > 20m；
C. according to HmaxThe specific speed calculation formula of corresponding range calculates specific speed, and the specific speed is denoted as ns, specific speed meter
Calculate formula are as follows:
Work as HmaxWhen≤20m,
Work as HmaxWhen > 20m,
Further, the invention also includes step d. according to HmaxThe unit speed calculation formula of corresponding range and step c institute
The n obtainedsUnit of account revolving speed, the unit speed are denoted as n11, unit speed calculation formula are as follows:
Work as HmaxWhen≤20m,
Work as HmaxWhen > 20m,
Further, the invention also includes step e. according to HmaxThe specific discharge calculation formula of corresponding range and step c institute
The n obtainedsUnit of account flow, the specific discharge are denoted as Q11, specific discharge calculation formula are as follows:
Work as HmaxWhen≤20m, Q11=2.4072Ln (ns)-13.617 (3)；
Work as HmaxWhen > 20m, Q11=2.6621Ln (ns)-15.396 (6)。
It should be understood that in unit of account revolving speed and specific discharge, the n of the hydraulic turbinesValue and calculation formula (1),
(4) value solved can have some difference sometimes, because of nsValue is usually to take to be conducive to calculate the subsequent other parameters of unit
Numerical value such as generator synchronous rotational speed etc., for example, by calculation formula calculated value calculate generator synchronous rotational speed be 99r/min, then
Generator synchronous rotational speed must be taken as the 100r/min of generator standard recommendation, nsValue then needs to do corresponding amendment；Certainly, have
When as needed, nsThe value that value i.e. calculation formula (1), (4) solve, therefore those skilled in the art can according to need
Voluntarily select.
The beneficial effects of the present invention are: the present invention is by collecting, arranging passing through for nearly 30 years a large amount of operational excellences in home and abroad
Streaming turbine-generator units data, by hydraulic turbine maximum application head Hmax, data is divided into Hmax≤20m、HmaxTwo groups of > 20m,
The different performance characteristics having with the different head range tubular turbine of correspondence.Using least square method, with a large amount of water
Turbine parameter does sample data, and regression calculation obtains tubular turbine in the basic parameter of the two head sections -- specific speed ns
(mkW), unit speed n11(r/min) and specific discharge Q11(m3/ s) calculation formula, done a large amount of calculating, derivation in early period
It is preferably full for the more reasonable Parameter Calculation method that sums up of tubular turbine creativeness after work
The hydroelectric project requirement of foot newly, for subsequent home and abroad construction of hydropower plant provides strong technical support.Also, regardless of
Whether there is or not same or similar hydraulic turbine model, the present invention is all suitable for.
Specific embodiment
Below by examples of implementation, the present invention will be further described.
The tubular turbine basic parameter statistical estimation formula generallyd use at present, mainly has②ns=21000/ (Hr+ 17)+35,④n11=0.1ns+ 92,⑥Q11=2.82 × 10-3ns+ 0.19, below by formula of the present invention (1)~(6) and commonly
Statistical estimation formula 1.~be 6. applied in sample data, obtain the error of each formula calculated result and true value, 1~table of table 3
For the comparison of wherein several groups of sample datas and its calculating error.
More than 1 group sample data of table (hydraulic turbine actual parameter)
2 present invention of table and the statistical estimation formula error comparison (H generallyd use at presentmax≤20m)
3 present invention of table and the statistical estimation formula error comparison (H generallyd use at presentmax> 20m)
2~table of table, 3 calculated result shows that the quadratic sum for the error that formula (1)~(6) obtain is most in each head section
It is small, it is as optimal, the calculating selection of new hydroelectric project tubular turbine basic parameter can be preferably applied for.
The foregoing describe basic principle of the invention and main feature, the description of specification only illustrates original of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.
Claims (3)
1. tubular turbine Parameter Calculation method, which comprises the following steps:
A. determine that the rated head of tubular turbine to be calculated, the rated head are denoted as Hr, the unit of rated head is m；
B. determine that the maximum application head of tubular turbine to be calculated, the maximum application head are denoted as Hmax, and judge Hmax
Locating range；
C. according to HmaxThe specific speed calculation formula of corresponding range calculates specific speed, and the specific speed is denoted as ns, the unit of specific speed
For mkW, specific speed calculation formula are as follows:
Work as HmaxWhen≤20m,
Work as HmaxWhen > 20m,
2. tubular turbine Parameter Calculation method according to claim 1, which is characterized in that further include step d.
According to HmaxThe unit speed calculation formula and the resulting n of step c of corresponding rangesUnit of account revolving speed, the unit speed are denoted as
n11, the unit of unit speed is r/min, unit speed calculation formula are as follows:
Work as HmaxWhen≤20m,
Work as HmaxWhen > 20m,
3. tubular turbine Parameter Calculation method according to claim 1 or 2, which is characterized in that further include step
Rapid e. is according to HmaxThe specific discharge calculation formula and the resulting n of step c of corresponding rangesUnit of account flow, the specific discharge
It is denoted as Q11, the unit of specific discharge is m3/ s, specific discharge calculation formula are as follows:
Work as HmaxWhen≤20m, Q11=2.4072Ln (ns)-13.617；
Work as HmaxWhen > 20m, Q11=2.6621Ln (ns)-15.396。
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| CN201710724349.3A CN107503874B (en) | 2017-08-22 | 2017-08-22 | Tubular turbine Parameter Calculation method |
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| CN108416527B (en) * | 2018-03-15 | 2021-08-10 | 中国电建集团成都勘测设计研究院有限公司 | Method for calculating power station cavitation coefficient of vertical shaft axial flow Kaplan turbine |
| CN108763745A (en) * | 2018-05-28 | 2018-11-06 | 中国电建集团成都勘测设计研究院有限公司 | Tubular turbine plant cavitation coefficient computational methods |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888991A (en) * | 2006-07-17 | 2007-01-03 | 四川东风电机厂有限公司 | Calculation Method of Machining Process Parameters of Meshing Surface of Through-flow Guide Vane |
| CN102054099A (en) * | 2010-12-16 | 2011-05-11 | 清华大学 | Method and device for designing three-dimensional closed guide blade with tubular type conical space |
-
2017
- 2017-08-22 CN CN201710724349.3A patent/CN107503874B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888991A (en) * | 2006-07-17 | 2007-01-03 | 四川东风电机厂有限公司 | Calculation Method of Machining Process Parameters of Meshing Surface of Through-flow Guide Vane |
| CN102054099A (en) * | 2010-12-16 | 2011-05-11 | 清华大学 | Method and device for designing three-dimensional closed guide blade with tubular type conical space |
Non-Patent Citations (2)
| Title |
|---|
| 金沙江溪洛渡水电站水轮机主要参数选择分析;蒋登云;《四川水力发电》;20050830;第24卷(第4期);34-40 |
| 飞来峡水电站水轮机模型验收试验与参数选择;游赞培;《水力发电》;20010421;57-60 |
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