CN107503874A - Tubular turbine Parameter Calculation method - Google Patents
Tubular turbine Parameter Calculation method Download PDFInfo
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- CN107503874A CN107503874A CN201710724349.3A CN201710724349A CN107503874A CN 107503874 A CN107503874 A CN 107503874A CN 201710724349 A CN201710724349 A CN 201710724349A CN 107503874 A CN107503874 A CN 107503874A
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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)
- Control Of Water Turbines (AREA)
- Hydraulic Turbines (AREA)
Abstract
The present invention relates to the power station hydraulic turbine, discloses a kind of tubular turbine Parameter Calculation method, realizes and tubular turbine basic parameter is calculated.The calculative tubular turbine basic parameter of the present invention includes specific speed ns, unit speed n11With specific discharge Q11, method of the invention is：The rated head of tubular turbine to be calculated is determined, the rated head is designated as Hr；The maximum application head of tubular turbine to be calculated is determined, the maximum application head is designated as Hmax, and judge HmaxResiding scope；According to HmaxThe calculation formula of corresponding scope calculates basic parameter, and formula is：Work as HmaxDuring≤20m,, Q11=2.4072Ln (ns)‑13.617；Work as HmaxDuring ＞ 20m,, Q11=2.6621Ln (ns)‑15.396.The present invention is applied to tubular turbine.
Description
Technical field
The present invention relates to the power station hydraulic turbine, more particularly to tubular turbine Parameter Calculation method.
Background technology
The hydraulic turbine refers to the mechanical energy that the mechanical energy of current is changed into runner in power station, runner and main shaft is overcome respectively
The machine planted resistance and continuously run, is referred to as " heart " in power station, the reasonable selection of its parameter is to hydroelectric project
Initial investment and after putting into operation the performance of economy of power plant benefit there is very important effect, be hydroelectric project design it is important in
Hold.
Hydraulic turbine specific speed nsIt is to weigh hydraulic turbine energy response, Cavitation Characteristics, operation stability and economy and elder generation
The composite target for the property entered.Improve specific speed and have to improving hydraulic turbine energy response, reduction unit cost and factory building construction investment
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, how specific speed n is reasonably determinedsIt is very important content in hydroelectric project design.By calculation formulaKnow, because the excursion of efficiency eta is limited, the η of tubular turbine is generally 88%~93%, only
Have and work as unit speed n11With specific discharge Q11During 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 try to achieve hydraulic turbine basic parameter -- ratio
Rotating speed ns, unit speed n11With specific discharge Q11, generally there is two kinds of evaluation methods.Method one：If in the hydroelectric project of design, water
The parameters such as turbine head, output are identical or close with the turbine parameter manufactured and designed, then utilize existing model runner parameter
Hydraulic turbine basic parameter is estimated with combined characteristic.Because the evaluation method is to be based on a certain existing model runner data,
Limited by technical conditions at that time, general is difficult that comprehensive, deep experimental study, thus the water wheels estimated are done to runner characteristic
Machine specific speed ns, unit speed n11With specific discharge Q11It is general to be difficult to meet new hydroelectric project requirement；It is particularly medium-sized or have
The hydroelectric project of particular/special requirement, actual conditions and service requirement according to engineering are usually required that, is ground 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 to estimate hydraulic turbine basic parameter by statistical formula in the evaluation method, current this statistical formula is more, because each statistics is public
The turbine parameter sample data of formula institute foundation be the 1970s and 1980s in last century before it is a certain head section or a certain
Specific speed nsScope, have some limitations, the result that same hydroelectric project is estimated with different statistical formulas is different, has
It is a little even to differ larger, can not correctly it choose.Therefore method one, two can not meet 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 Q11Typically
Also it is difficult to meet new hydroelectric project requirement.
The present invention collect, arrange home and abroad in the past 30 years substantial amounts 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 substantial amounts of turbine parameter, regression calculation obtains new water
Turbine Parameter Calculation formula, draw rational hydraulic turbine specific speed ns, unit speed n11With specific discharge Q11Calculated value, with
Meet new hydroelectric project requirement.
The content of the invention
The technical problem to be solved in 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：Tubular turbine Parameter Calculation method, bag
Include following steps：
A. the rated head of tubular turbine to be calculated is determined, the rated head is designated as Hr；
B. the maximum application head of tubular turbine to be calculated is determined, the maximum application head is designated as Hmax, and judge
HmaxResiding scope；H in the present inventionmaxScope residing for possible shares Hmax≤20m、HmaxTwo groups of ＞ 20m；
C. according to HmaxThe specific speed calculation formula of corresponding scope calculates specific speed, and the specific speed is designated as ns, specific speed meter
Calculating formula is：
Work as HmaxDuring≤20m,
Work as HmaxDuring ＞ 20m,
Further, present invention additionally comprises step d. according to HmaxThe unit speed calculation formula of corresponding scope and step c institutes
The n obtainedsUnit of account rotating speed, the unit speed are designated as n11, unit speed calculation formula is：
Work as HmaxDuring≤20m,
Work as HmaxDuring ＞ 20m,
Further, present invention additionally comprises step e. according to HmaxThe specific discharge calculation formula of corresponding scope and step c institutes
The n obtainedsUnit of account flow, the specific discharge are designated as Q11, specific discharge calculation formula is：
Work as HmaxDuring≤20m, Q11=2.4072Ln (ns)-13.617 (3)；
Work as HmaxDuring ＞ 20m, Q11=2.6621Ln (ns)-15.396 (6)。
It should be noted that：In unit of account rotating speed and specific discharge, the n of the hydraulic turbinesValue and calculation formula (1),
(4) value solved can have some difference sometimes, because nsValue is typically to take to be advantageous to calculate the follow-up other specification of unit
Numerical value such as generator synchronous rotational speed etc., such as the generator synchronous rotational speed calculated by the calculated value of calculation formula is 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 be as needed
Voluntarily select.
The beneficial effects of the invention are as follows：The present invention is by collecting, arranging passing through for nearly 30 years substantial amounts 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 corresponding different head scope tubular turbine.Using least square method, with substantial amounts of water
Turbine parameter does sample data, and regression calculation obtains basic parameter of the tubular turbine in the two head sections -- specific speed ns
(mkW), unit speed n11And specific discharge Q (r/min)11(m3/ s) calculation formula, a large amount of calculating, derivation have been done in early stage
It is preferably full for the more rational Parameter Calculation method that sums up of tubular turbine creativeness after work
The hydroelectric project requirement of foot newly, for follow-up home and abroad construction of hydropower plant provides strong technical support.Also, no matter
Same or similar hydraulic turbine model is whether there is, the present invention is all suitable for.
Embodiment
Below by examples of implementation, the present invention will be further described.
The tubular turbine basic parameter statistical estimation formula generally used at present, mainly has
②ns=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 conventional statistical estimation formula are 1.~is 6. applied to sample
In notebook data, each formula result of calculation and the error of actual value are obtained, 1~table of table 3 is wherein several groups of sample datas and its calculating
The contrast of error.
The group of table more than 1 sample data (hydraulic turbine actual parameter)
The present invention of table 2 and the statistical estimation formula error contrast (H generally used at presentmax≤20m)
The present invention of table 3 and the statistical estimation formula error contrast (H generally used at presentmax＞ 20m)
The result of calculation of 2~table of table 3 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 general principle of the present invention and main feature are the foregoing described, the description of specification simply illustrates the original of the present invention
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
It all fall within the protetion scope of the claimed invention.
Claims (3)
1. tubular turbine Parameter Calculation method, it is characterised in that comprise the following steps：
A. the rated head of tubular turbine to be calculated is determined, the rated head is designated as Hr；
B. the maximum application head of tubular turbine to be calculated is determined, the maximum application head is designated as Hmax, and judge Hmax
Residing scope；
C. according to HmaxThe specific speed calculation formula of corresponding scope calculates specific speed, and the specific speed is designated as ns, specific speed calculates public
Formula is：
Work as HmaxDuring≤20m,
Work as HmaxDuring ＞ 20m,
2. tubular turbine Parameter Calculation method according to claim 1, it is characterised in that also including step d.
According to HmaxN obtained by the unit speed calculation formula and step c of corresponding scopesUnit of account rotating speed, the unit speed are designated as
n11, unit speed calculation formula is：
Work as HmaxDuring≤20m,
Work as HmaxDuring ＞ 20m,
3. tubular turbine Parameter Calculation method according to claim 1 or 2, it is characterised in that also include step
Rapid e. is according to HmaxN obtained by the specific discharge calculation formula and step c of corresponding scopesUnit of account flow, the specific discharge
It is designated as Q11, specific discharge calculation formula is：
Work as HmaxDuring≤20m, Q11=2.4072Ln (ns)-13.617；
Work as HmaxDuring ＞ 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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| CN201710724349.3A CN107503874B (en) | 2017-08-22 | 2017-08-22 | Tubular turbine Parameter Calculation method |
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| CN107503874B CN107503874B (en) | 2019-02-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108416527A (en) * | 2018-03-15 | 2018-08-17 | 中国电建集团成都勘测设计研究院有限公司 | Vertical shaft movable propeller turbine plant cavitation coefficient computational methods |
| 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 |
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| CN1888991A (en) * | 2006-07-17 | 2007-01-03 | 四川东风电机厂有限公司 | Through-flow type guide blade body mating surface working process parameter calculating method |
| 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 |
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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 | Through-flow type guide blade body mating surface working process parameter calculating method |
| 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 |
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| 游赞培: "飞来峡水电站水轮机模型验收试验与参数选择", 《水力发电》 * |
| 蒋登云: "金沙江溪洛渡水电站水轮机主要参数选择分析", 《四川水力发电》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108416527A (en) * | 2018-03-15 | 2018-08-17 | 中国电建集团成都勘测设计研究院有限公司 | Vertical shaft movable propeller turbine plant cavitation coefficient computational methods |
| 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 |
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