CN1295650A - Runner for a turbo-machine, especially for water turbine - Google Patents
Runner for a turbo-machine, especially for water turbine Download PDFInfo
- Publication number
- CN1295650A CN1295650A CN99802563A CN99802563A CN1295650A CN 1295650 A CN1295650 A CN 1295650A CN 99802563 A CN99802563 A CN 99802563A CN 99802563 A CN99802563 A CN 99802563A CN 1295650 A CN1295650 A CN 1295650A
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- China
- Prior art keywords
- runner
- blades
- blade
- divided
- edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/04—Blade-carrying members, e.g. rotors for radial-flow machines or engines
- F01D5/043—Blade-carrying members, e.g. rotors for radial-flow machines or engines of the axial inlet- radial outlet, or vice versa, type
- F01D5/045—Blade-carrying members, e.g. rotors for radial-flow machines or engines of the axial inlet- radial outlet, or vice versa, type the wheel comprising two adjacent bladed wheel portions, e.g. with interengaging blades for damping vibrations
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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
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/125—Rotors for radial flow at high-pressure side and axial flow at low-pressure side, e.g. for Francis-type turbines
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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
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/14—Rotors having adjustable blades
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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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention relates to a runner for a Francis turbine, comprising a plurality of blades whereby pairs of said blades form a flow channel. The runner also comprises a base and a crown. The invention is characterised by the following features: the blades are divided into at least two partial blades along one or several partition lines; the base and the crown are divided into rings corresponding to said partial blades in order to form runners and the position of the individual runners can be adjusted in relation to said runners.
Description
The present invention relates to a kind of fluid machinery that is used for incompressible or compressible medium, especially a kind of water turbine, draw water turbo machine or water pump, this fluid machinery comprises runner, holds the housing of guide vane wheel, also is provided with on housing, drain opening.In addition, also comprise a guiding device, it has and is arranged on the blade in the passage in a large number and is installed in runner or the place ahead of another guide vane wheel or back.These for example can be referring to U.S. Pat-A-4 496 282.
Be to make it in the field higher efficient arranged as far as possible widely today to the most important requirement that this type of machinery proposed.In this course, people can improved angle carry out different trials from various, the proportion of goods damageds of the novel fluid machinery that is used for incompressible medium of modern times are reduced to below 5%, and meanwhile, the efficient of different model machine has also improved 10%.
Germany Patent document DE 197 41 992 A1 record has also been described a kind of water turbine.This water turbine is equipped with the device that a cover can be optimized machine velocity profile under the different operating state, and then the streamflow regime of draft tube is exerted an influence, and reaches the purpose that adapts to the different operating condition better.
The object of the present invention is to provide some measures,, thereby bring into play the working efficiency of this machine under the different operating condition to greatest extent with can making a machine fullest more so that utilize wide head and/or range of flow.
Purpose of the present invention realizes by the contained feature of claim 1.
The inventor has opened up a brand-new road, promptly runner is divided into two and even a plurality of minute wheel.Each blade is separated by the boundary seam of one or more of self-rotation wheels bottom to the runner edge, and these boundary seams extend substantially transversely to flow direction.Be positioned at the moving vane leading edge if boundary is stitched, then it is parallel to the leading edge extension, if the boundary seam is positioned at trailing edge, then it also is arranged essentially parallel to the trailing edge extension.
In patent application DE 42 23 965 Al, though put down in writing a kind of fluid machinery runner, this runner is equipped with a large amount of blades, and each blade is divided into two by the seam of demarcating together.But what this patent application related to is not water turbine, but a turbo machine, and its medium is gas and on-liquid.Therefore, the present invention and this documents are existing basic difference aspect the selected topic and its purpose that stresses.The blade of a Francis turbine, its structure and external form also are different from the runner that piece patent application is recorded and narrated fully.The runner main body of mentioning in that piece patent application is in the form of annular discs, and blade does not have curvature of space.
Blade can be divided into a plurality of minutes blades, such as being divided into three branch blades by two boundary seams.Each minute, blade can be equally big or different big.Like this, the demarcation of boundaries seam is divided into the less frontal lobe of area and bigger main lobe two-part to blade according to circumstances.
An essential features of the present invention is, not only runner bucket can be divided into a plurality of minutes blades, and runner bottom and runner edge all can be divided into little part.We know that generally, runner bottom and runner edge mainly are to constitute a ring respectively.The result who divides them forms different branch rings, each minute ring respectively with each minute blade fix.So just form one and comprise the branch blade, in fact an annulus runner bottom and an annulus runner edge are exactly one and independently divide runner in interior unit.
These unit can reverse relatively.For example, but front-wheel and main wheel part relativity shift certain distance, thus can influence the ride quality of water turbine targetedly.
Within the scope of the present invention many forms of implementation and modification can be arranged.
For example, can change the branch impeller.After it weares and teares, it can be pulled down, install new branch impeller.Especially can consider the branch impeller that is subjected to water impact is at first changed.
Certainly, changing that parts have more than is in order to deal with the situation when wearing and tearing occurring, also is very significant for adapting to different Operational Limitss.As everyone knows, flow and head fluctuate widely with seasonal variations, therefore just must do the design that makes new advances to the replacing of minute wheel.
Single minute wheel can be made of different materials.For example, be subjected to the minute wheel of water impact at first, can make with a kind of shock proof especially material.
In concrete the application, can more change whole minute wheel, and only change its blade or divide blade, for example by the part of water impact.
The number of blade of each minute wheel has nothing in common with each other.Radially be in the outside and, can load onto a large amount of blades, such as 21 at first by the outside minute wheel of water impact.The number of blade of median size minute wheel is taken second place, and such as 14, and the number of blade that radially is positioned at inboard minute wheel is taken second place, such as only 7.
Boundary seam trend between two minute wheels is general vertical with water (flow) direction, and extends to the runner edge from the runner bottom part board.
By accompanying drawing the present invention is described in detail below, in the accompanying drawing:
Fig. 1 is the meridian sectional view of Francis turbine;
Fig. 2 is the simple meridian sectional view of francis turbine runner;
Fig. 3 a, 3b, 3c and 3d are respectively two blades and the expansion diagrammatic sketch of wheel rim when the different operating state of an impeller that extremely simply illustrates;
In Fig. 3 a, forward and backward runner all is closed condition;
In Fig. 3 b, preceding runner is opened, and back runner cuts out;
In Fig. 3 c, preceding runner cuts out, and back runner is opened;
In Fig. 3 d, forward and backward runner all is opening state;
Fig. 4 is the part of water turbine shown in Figure 1, that is the amplification diagrammatic sketch in boundary seam district;
Fig. 5 a and 5b are the meridian cross-sectional of the various modification of Francis turbine one runner;
Fig. 6 is the meridian cross-sectional that has the Francis turbine of two minute wheels;
Fig. 7 is the axial, cross-sectional view of water turbine shown in Figure 6;
Fig. 8 is a sectional view that is divided into the blade of big or small leaflet, and an inflatable leaflet is wherein arranged;
Fig. 9 is the axial, cross-sectional view with Francis turbine of three minute wheels, and each minute wheel number of blade is successively decreased one by one by spatial order from outside to inside.
Francis turbine shown in Figure 1 mainly comprises runner 1, housing 2, guiding device 3 and an axle 4.
Runner comprises a wheel cap 1.1, one wheel rims 1.2 and many blades 1.3.Between so-called turbine lid 2.1 and wheel cap 1.1, there is a wheel side space 5, a wheel side space 6 is also arranged between wheel rim 1.2 and casing 2 simultaneously.
The boundary seam that Fig. 1 .4 shows, approximate parallel with the water inlet edge of machinery with the water outlet edge.Certainly, the bearing of trend of boundary seam also can depart from it in principle.
Boundary seam 1.4 has been divided into frontal lobe 1.3.1 and main lobe 1.3.2 to each blade 1.3.And, this boundary seam bottom annulus shown in 1.1.1 and the 1.1.2 and the runner 1.1 and runner edge 1.2 separate.Like this, frontal lobe 1.3.1 and annulus runner bottom 1.1.1 and annulus runner edge 1.2.1 have just formed a unit.
And main lobe 1.3.2 and runner bottom also constitute a units corresponding with the main body that the runner edge is left.
These two unit can reverse relatively, that is reverse relatively around mechanical axis 4.1.
The runner of a Francis turbine shown in Figure 2 also comprises above-mentioned parts, i.e. runner bottom 1.1, runner edge 1.2 and blade 1.3.As what we saw, these blades are divided into three parts by twice boundary seam 1.4.1 and 1.4.2, promptly divide blade 1.3.1,1.3.2 and 1.3.3.
From the amplification plan view of each leaflet shown in Figure 3, can find out, each minute blade can center on mechanical axis 4.1 relative deflections.In off position, each leaflet tightly is close together and forms a unit, is tantamount to a traditional runner.
We can have following discovery: when front-wheel was in closed condition shown in Fig. 3 a, its main lobe and frontal lobe part were seamlessly closed up.And trailing wheel also in this way.Among Fig. 3 b, front-wheel is in opening state, and trailing wheel is closed.Front-wheel is closed among Fig. 3 c, and trailing wheel is opened.Among Fig. 3 d then front and back wheels all be in opening state.
Known to us, can regulate the gap targetedly.When being in closed condition, each parts just like constitute an integral body.Hit if run in off position in the unfavorable current, can improve flow condition by opening.The flow condition at water inlet leading edge and water outlet trailing edge place then depends on the width of boundary seam 1.4 to a great extent and regulates.
The front is mentioned, and the objective of the invention is, and makes runner can adapt to different operating conditions." different operating conditions " are meant the variation of head and flow here.This variation is mainly caused by seasonal factor.Winter, water level usually was lower than summer.By regulating the relative position between each leaflet of forming main lobe, can make water turbine be easier to adapt to the variation of above-mentioned operating conditions.Referring to accompanying drawing 3.
As our finding, boundary seam 1.4 is very wide.That is to say, it in occupation of from frontal lobe 1.3.1 to the big segment distance the main lobe 1.3.2, thereby cause main lobe 1.3.2 to constitute simultaneously a water inlet leading edge again.Like this, the streamflow regime of water inlet leading edge can optionally be controlled by the width that the boundary seam is set.
From Fig. 4 the amplification of each parts Fig. 1 is illustrated, we can see the frontal lobe 1.3.1 that is fixed together with annulus runner bottom 1.1.1.Can also see the main lobe 1.3.2 that is fixed together with the runner bottom major component 1.1.2 that is similarly ring-type.Two annulus 1.1.1 of runner bottom and 1.1.2 by a bearing 7 axially and radial supports and can reverse along not shown mechanical axis 4.1 relatively.Usually consider to use sliding bearing as bearing.Certainly, other forms of bearing also can use.
Fig. 5 a and 5b and Fig. 2 are similar.But different with Fig. 2 is, the runner among Fig. 5 a is furnished with front-wheel, and the cross-section 1.4.1 of this front-wheel only by runner bottom and a part of blade, do not cut apart by the runner edge among Fig. 5 a.Runner among Fig. 5 b is furnished with trailing wheel, and the cross-section 1.4.2 of this trailing wheel is only by runner edge and partial blade, so runner bottom 1.1 do not separated, and connects mutually with a part that is divided into two-part runner edge 1.2 by blade 1.3.2.Also can do another kind of combination with dividing front-wheel, runner and trailing wheel and different mating face, this is feasible and significant.
Fig. 6 and 7 has also shown the possibility that other is interesting.Individual blade shown in the figure is made up of a slice main lobe 1.3.1 and a slice bluff bit 1.3.2.Major and minor two blades are bonded together by a boundary seam 1.4.A main lobe 1.3.1 and an annulus wheel bottom and an annulus wheel rim are fixed together.And accessory lobes are also fixed with the ring section of wheel bottom and wheel rim.
The accessory lobes 1.3.2 that shows among the figure is in the state behind the disengaging main lobe 1.3.1.Its position of driving into is shown in broken lines in the drawings.
Blade 1.3 shown in Figure 8 is divided into 1.3.1 again, three leaflets of 1.3.2 and 1.3.3, and two boundary seam 1.4.1 and 1.4.2 are separated from each other them.The leaflet 1.3.1 that describes with sectional view is a hollow.This hollow cavity has a pressure connection tube, and blade is inflatable thus.Form after it expands illustrates with dot and dash line in the drawings.
As shown in Figure 9, the number of blade of each leaflet is radially progressively successively decreased from outside to inside.Like this, the number of blade of the leaflet 1.3.2 that the position is placed in the middle is less than outer leaflet 1.3.1 then, the leaflet 1.3.2 in the middle of the number of blade of inboard leaflet 1.3.3 is less than again.
Claims (13)
1. runner that is used for Francis turbine, it has:
1.1 a large amount of blades (1.3), these blades form a flow channel respectively in couples mutually,
1.2 a runner bottom (1.1),
1.3 a runner edge (1.2),
It is characterized in that:
1.4 blade along one or more boundary seam (1.4) be divided at least two fans divide blades (1.3.1,1.3.2),
Runner bottom 1.5 (1.1) and runner edge (1.2) equally by different branch blades (1.3.1,1.3.2) correspondingly be divided into a plurality of rings section (1.1.1 1.1.2), takes turns thereby produce a component,
1.6 can the relative adjustment position between each minute wheel.
2. runner that is used for Francis turbine, it has:
2.1 a large amount of blades (1.3), these blades form a flow channel respectively in couples mutually,
2.2 a runner bottom (1.1),
2.3 a runner edge (1.2),
It is characterized in that:
2.4 blade along one or more boundary seam (1.4) be divided at least two fans divide blades (1.3.1,1.3.2),
2.5 extend to runner edge (1.2) each bar boundary seam (1.4) self-rotation wheel bottom (1.1),
Runner bottom 2.6 (1.1) and runner edge (1.2) equally by different branch blades (1.3.1,1.3.2) correspondingly be divided into a plurality of rings section (1.1.1 1.1.2), takes turns thereby produce a component,
2.7 can the relative adjustment position between each minute wheel.
3. runner according to claim 1 and 2 is characterized in that each minute wheel can reverse relatively.
4. according to each described runner in the claim 1 to 3, it is characterized in that each minute wheel can be parallel to rotation axis (4.1) and relatively move.
5. according to each described runner in the claim 1 to 4, it is characterized in that the part of blade can be changed (replaceable blade).
6. runner according to claim 5 is characterized in that, the field-replaceable unit of installing on or the same position in the runner differs according to different operating parameters designs and/or makes with different materials.
7. according to each described runner in the claim 1 to 6, it is characterized in that each minute wheel has the blade of varying number.
8. runner according to claim 7 is characterized in that blade successively decreases from outside to inside successively from the runner to the runner.
9. according to each described runner in the claim 1 to 8, it is characterized in that boundary seam 1.4 extends substantially transversely to flow direction and extends.
10. according to each described runner in the claim 1 to 7, it is characterized in that boundary seam 1.4 extends along flow direction basically.
11. a runner that is used for Francis turbine, it has:
11.1 a large amount of blades (1.3), these blades form a flow channel respectively in couples mutually,
11.2 a runner bottom (1.1),
11.3 a runner edge (1.1),
It is characterized in that:
11.4 blade along one or more boundary seam (1.4) be divided at least two fans divide blades (1.3.1,1.3.2),
Runner bottom 11.5 (1.1) and runner edge (1.2) equally by different branch blades (1.3.1,1.3.2) correspondingly be divided into a plurality of rings section (1.1.1 1.1.2), takes turns thereby produce a component,
11.6 can the relative adjustment position between each minute wheel,
11.7 blade is divided into primary blades (1.3.1) and back blades (1.3.2) two-part.
12. runner according to claim 11 is characterized in that, primary blades can be reversed relatively with back blades.
13. a runner that is used for Francis turbine, it has:
13.1 a large amount of blades (1.3), these blades form a flow channel respectively in couples mutually,
13.2 a runner bottom (1.1),
13.3 a runner edge (1.2),
It is characterized in that:
13.4 blade along one or more boundary seam (1.4) be divided at least two fans divide blades (1.3.1,1.3.2),
Runner bottom 13.5 (1.1) and runner edge (1.2) equally by different branch blades (1.3.1,1.3.2) correspondingly be divided into a plurality of rings section (1.1.1 1.1.2), takes turns thereby produce a component,
But 13.6 relative adjustment position between each minute wheel,
13.1 have at least indivedual blades inflatable, can change its profile.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803390A DE19803390C1 (en) | 1998-01-29 | 1998-01-29 | Rotor wheel for Francis water turbine |
| DE19803390.7 | 1998-01-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1295650A true CN1295650A (en) | 2001-05-16 |
| CN1091220C CN1091220C (en) | 2002-09-18 |
Family
ID=7856000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99802563A Expired - Fee Related CN1091220C (en) | 1998-01-29 | 1999-01-19 | Runner for a turbo-machine, especially for water turbine |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN1091220C (en) |
| AU (1) | AU2618699A (en) |
| BR (1) | BR9907713A (en) |
| DE (1) | DE19803390C1 (en) |
| WO (1) | WO1999039096A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN100439701C (en) * | 2003-03-14 | 2008-12-03 | 哈尔滨电机厂有限责任公司 | Mixed-flow hydraulic turbine frequency-variable reel |
| CN102828883A (en) * | 2011-06-17 | 2012-12-19 | 杭州诚德发电设备有限公司 | Double-wheel water turbine with adjustable turning wheels |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10213774A1 (en) * | 2002-03-27 | 2003-10-23 | Voith Siemens Hydro Power | Francis turbine or Francis pump or Francis pump turbine |
| WO2004011707A2 (en) | 2002-07-26 | 2004-02-05 | Bernd Gapp | Composite material |
| AT412496B (en) * | 2002-09-26 | 2005-03-25 | Va Tech Hydro Gmbh & Co | WHEEL OF A HYDRAULIC MACHINE |
| AT412495B (en) * | 2002-09-26 | 2005-03-25 | Va Tech Hydro Gmbh & Co | WHEEL OF A HYDRAULIC MACHINE |
| NO327520B1 (en) | 2007-12-05 | 2009-07-27 | Dynavec As | Device by impeller |
| DE102015219331A1 (en) * | 2015-10-07 | 2017-04-13 | Voith Patent Gmbh | Radial impeller |
| DE102016009112A1 (en) | 2016-07-20 | 2018-01-25 | Siegfried Sumser | Hydro turbine, in particular for a hydroelectric power plant |
| AT520226B1 (en) * | 2017-07-28 | 2021-08-15 | Andritz Hydro Gmbh | Wheel |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE367601C (en) * | 1923-01-23 | Hermann Reuter | Overpressure turbine, the impeller of which has a ring of fixed and then a ring of rotatable blades mounted on both sides | |
| CH105771A (en) * | 1923-09-04 | 1924-10-01 | Huguenin Albert | Impeller with rotating blades for water turbines, through which the propellant flows in both directions. |
| US1788307A (en) * | 1928-05-19 | 1931-01-06 | Lack Rudolf | Turbine impeller |
| GB1085390A (en) * | 1965-09-18 | 1967-09-27 | Turbowerke Meia En Veb | A rotor or stator for axial flow machines, particularly for extractors and blowers |
| US4496282A (en) | 1982-05-06 | 1985-01-29 | Allis-Chalmers Corporation | Reversible two-stage hydraulic machine |
| SE445107B (en) * | 1983-06-22 | 1986-06-02 | Volvo Penta Ab | ROTOR DEVICE |
| US4599041A (en) * | 1984-12-19 | 1986-07-08 | Stricker John G | Variable camber tandem blade bow for turbomachines |
| GB2258272B (en) * | 1991-07-27 | 1994-12-07 | Rolls Royce Plc | Rotors for turbo machines |
| US5558502A (en) * | 1993-12-24 | 1996-09-24 | Pacific Machinery & Engineering Co., Ltd. | Turbo pump and supply system with the pump |
| US5938403A (en) * | 1996-03-13 | 1999-08-17 | Hitachi, Ltd. | Runner, water wheel and method of manufacturing the same |
| DE19741992A1 (en) * | 1997-09-24 | 1999-03-25 | Voith Hydro Gmbh & Co Kg | Water turbine with running wheel |
-
1998
- 1998-01-29 DE DE19803390A patent/DE19803390C1/en not_active Expired - Fee Related
-
1999
- 1999-01-19 CN CN99802563A patent/CN1091220C/en not_active Expired - Fee Related
- 1999-01-19 WO PCT/EP1999/000277 patent/WO1999039096A1/en active Application Filing
- 1999-01-19 AU AU26186/99A patent/AU2618699A/en not_active Abandoned
- 1999-01-19 BR BR9907713-2A patent/BR9907713A/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439701C (en) * | 2003-03-14 | 2008-12-03 | 哈尔滨电机厂有限责任公司 | Mixed-flow hydraulic turbine frequency-variable reel |
| 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 |
| CN102828883A (en) * | 2011-06-17 | 2012-12-19 | 杭州诚德发电设备有限公司 | Double-wheel water turbine with adjustable turning wheels |
Also Published As
| Publication number | Publication date |
|---|---|
| BR9907713A (en) | 2000-11-14 |
| WO1999039096A1 (en) | 1999-08-05 |
| CN1091220C (en) | 2002-09-18 |
| AU2618699A (en) | 1999-08-16 |
| DE19803390C1 (en) | 1999-02-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020918 Termination date: 20110119 |