CN1035163A - Rotary wheel of water turbine with two fulcrum blades and cantilever blade - Google Patents
Rotary wheel of water turbine with two fulcrum blades and cantilever blade Download PDFInfo
- Publication number
- CN1035163A CN1035163A CN89105860A CN89105860A CN1035163A CN 1035163 A CN1035163 A CN 1035163A CN 89105860 A CN89105860 A CN 89105860A CN 89105860 A CN89105860 A CN 89105860A CN 1035163 A CN1035163 A CN 1035163A
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- China
- Prior art keywords
- water turbine
- blades
- fulcrum
- blade
- runner
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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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- Hydraulic Turbines (AREA)
Abstract
The use head that improves certain specific speed water turbine is the direction of modern water turbine development.The potentiality of further improving the water turbine cavitation performance by traditional structure are little, thereby limited the development of water turbine.The present invention adopts to install additional between per two blades in the ring under middle and high specific speed mixed-flow type runner and encircles two kinds of structures that increase central ring and increase the number of blade in the central ring outer under additional blades or the cancellation, can both reduce the water turbine pitting coefficient significantly; The latter can also improve rotating speed, improves structural strength, makes the water wheels function of certain specific speed be applied to higher head.
Description
The present invention is a kind of new type hydraulic turbine runner with low pitting coefficient and high structural strength.Can improve the use head of certain specific speed water turbine.It is specially adapted to the large-scale and giant turbine of middle and high specific speed.
The middle and high specific speed mixed-flow type turbine runner of modern extensive use is shown in the figure worker.At its crown (1) and down between the ring (2).Along being uniform-distribution with some two fulcrum blades (3) garden week.Near the degree of vacuum of encircling the vacuum side of blade in zone down is the highest in the whole runner.The degree of vacuum of vacuum side of blade reduces gradually from encircling (2) to crown (1) down.Therefore the ratio of near the degree of vacuum of the blade of ring and working head H is maximum down.This ratio is the pitting coefficient 6a of water turbine.It is limiting the maximum draught-height Hs of water turbine, is also just limiting the highest use head of water turbine.
The present invention has adopted identical but the two kinds of schemes that structure is different of principle to reduce the water turbine pitting coefficient significantly, improves it and uses head:
First kind of structure is shown in the figure II.Near encircling (2) zone down, between per two two fulcrum blades (3), increase the additional blades (4) that width b is little at runner.The outer end of this additional blades (4) is fixed on down ring (2) internal surface, becomes the cantilever blade that following ring is a fulcrum.If the length l of this additional blades (4) equates that with the length L of two fulcrum blades (3) the degree of vacuum △ H that presses leaf grating principle, blade will reduce half, just pitting coefficient 6a value will reduce by 50%.Obviously the pitting coefficient of the water turbine of equipping with such runner is 6m and no longer be a.From figure the worker as can be known 6m much smaller than 6a.
Second kind of structure is shown in the figure III.Cancel traditional following ring (2), increased the central ring (5) shown in the figure III.The blade (3) that is connected between central ring (5) and the crown (1) is two fulcrums.The blade (4) of cantilever is being fixed in the outer of central ring.The number of blade (4) is greater than the number of blade (3).The length of blade (4) can have two kinds of situations: a kind of is that the length l and the width b thereof of all blades equates; Another kind is that wherein half length and second half length are unequal.Have only between outer of these blades (4) and the static runner envelope (6) very little, the gap delta that does not hinder the runner rotation.This structure and first kind of the same effect of playing the reduction pitting coefficient of structure.Because replaced following ring (2) in the figure II with central ring (5), the wheel disc friction loss reduces greatly, therefore can improve the rotating speed (promptly improving specific speed) of water turbine and the efficient of unlikely reduction water turbine.Also because reducing between central ring (5) and the crown (1) apart from B.Thereby the strength and stiffness of runner have all improved.All these will make this novel runner can be applied to higher head.Make the water power plant obtain big economic benefit.If be used for the generating of large hydropower station first stage of construction low water head, just can increase the machine flow, increase substantially unit output, will seem more favourable.
Realize that method of the present invention and research, design, manufacturing tradition francis turbine runner are the same substantially, there is no particular difficulty.
Claims (6)
1, a kind of rotary wheel of water turbine that has two fulcrum blades and single fulcrum cantilever blade simultaneously.It is characterized in that:
A, runner also have single fulcrum cantilever blade except that two fulcrum blades are arranged.
B, when having central ring, runner do not have down ring.
2, by claim requirement 1A, two fulcrum vanes fixed are at the crown of runner with down between the ring; Single fulcrum cantilever blade is fixed on down between the two fulcrum blades of ring inner surface.
3, by claim requirement 1B, two fulcrum vanes fixed are between the central ring and crown of runner; Single fulcrum cantilever blade is fixed on the outer of central ring.
4, by claim requirement 1 and 3, runner has central ring.
5, by claim requirement 2, the width b of cantilever blade is less than the width B of two fulcrum blades; The length l of cantilever blade is equal to or less than the length L of two fulcrum blades.
6, by claim requirement 3, the width b of all cantilever blades equates, but its length l can be unequal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89105860A CN1022702C (en) | 1989-02-14 | 1989-02-14 | Water turbine rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89105860A CN1022702C (en) | 1989-02-14 | 1989-02-14 | Water turbine rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1035163A true CN1035163A (en) | 1989-08-30 |
| CN1022702C CN1022702C (en) | 1993-11-10 |
Family
ID=4856495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89105860A Expired - Fee Related CN1022702C (en) | 1989-02-14 | 1989-02-14 | Water turbine rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1022702C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1087813C (en) * | 1996-10-17 | 2002-07-17 | 米罗斯拉夫·塞德拉切克 | rolling fluid machine |
| CN100427753C (en) * | 2005-11-18 | 2008-10-22 | 清华大学 | Mixed flow type water turbin having H-type flow path rotary wheel |
| CN100436811C (en) * | 2003-06-06 | 2008-11-26 | 沃依特·西门子水力发电两合公司 | Turning wheel used for mixed flow turbine |
| CN102364083A (en) * | 2011-07-01 | 2012-02-29 | 哈尔滨电机厂有限责任公司 | Long-short blade rotating wheel for mixed flow pump turbine |
| CN104791172A (en) * | 2015-03-12 | 2015-07-22 | 哈尔滨电机厂有限责任公司 | Method for determining bothway flow distributing mixed flow type water pump turbine blade space position |
| CN104847568A (en) * | 2015-03-19 | 2015-08-19 | 中国水利水电科学研究院 | Mixed-flow water turbine runner with double flow channels on outlet |
-
1989
- 1989-02-14 CN CN89105860A patent/CN1022702C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1087813C (en) * | 1996-10-17 | 2002-07-17 | 米罗斯拉夫·塞德拉切克 | rolling fluid machine |
| CN100436811C (en) * | 2003-06-06 | 2008-11-26 | 沃依特·西门子水力发电两合公司 | Turning wheel used for mixed flow turbine |
| CN100427753C (en) * | 2005-11-18 | 2008-10-22 | 清华大学 | Mixed flow type water turbin having H-type flow path rotary wheel |
| CN102364083A (en) * | 2011-07-01 | 2012-02-29 | 哈尔滨电机厂有限责任公司 | Long-short blade rotating wheel for mixed flow pump turbine |
| CN102364083B (en) * | 2011-07-01 | 2013-04-24 | 哈尔滨电机厂有限责任公司 | Long-short blade rotating wheel for mixed flow pump turbine |
| CN104791172A (en) * | 2015-03-12 | 2015-07-22 | 哈尔滨电机厂有限责任公司 | Method for determining bothway flow distributing mixed flow type water pump turbine blade space position |
| CN104847568A (en) * | 2015-03-19 | 2015-08-19 | 中国水利水电科学研究院 | Mixed-flow water turbine runner with double flow channels on outlet |
| CN104847568B (en) * | 2015-03-19 | 2017-10-20 | 中国水利水电科学研究院 | One kind outlet dual channel francis turbine runner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1022702C (en) | 1993-11-10 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |