EP4469675A1 - Pumpe für ein wasserkraftwerk - Google Patents
Pumpe für ein wasserkraftwerkInfo
- Publication number
- EP4469675A1 EP4469675A1 EP22821554.7A EP22821554A EP4469675A1 EP 4469675 A1 EP4469675 A1 EP 4469675A1 EP 22821554 A EP22821554 A EP 22821554A EP 4469675 A1 EP4469675 A1 EP 4469675A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connecting line
- pressure
- pump
- suction pipe
- water
- 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.)
- Granted
Links
Classifications
-
- 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
- F03B15/00—Controlling
- F03B15/005—Starting, also of pump-turbines
-
- 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
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/002—Injecting air or other fluid
-
- 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
- F03B3/02—Machines or engines of reaction type; Parts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
-
- 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
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
- F03B3/186—Spiral or volute casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/10—Stators
- F05B2240/13—Stators to collect or cause flow towards or away from turbines
- F05B2240/132—Stators to collect or cause flow towards or away from turbines creating a vortex or tornado effect
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/96—Preventing, counteracting or reducing vibration or noise
Definitions
- the invention relates to a pump for a hydroelectric power station.
- the pump can also be a pump turbine.
- Such a pump includes an impeller, a volute casing and a suction pipe.
- DE 10 2010 050 001 A1 discloses such a pump or pump turbine.
- This includes a counter-swirl generator, which can be activated during start-up in the pumping direction.
- the counter-swirl generator comprises a plurality of guide elements or swirl-generating nozzles. They are located at the outlet portion of the draft tube and around the axis of rotation of the impeller.
- JPS5 181974 A discloses such a connection line.
- the connecting line disclosed in the cited document serves to drain the spiral housing.
- the object of the invention is to specify an arrangement which is able to generate a counter-twist and which is of simpler design than the arrangement known from the prior art.
- FIG. 1 shows a pump according to the invention in a greatly simplified representation.
- the pump comprises a high-pressure side waterway, a low-pressure side waterway and an impeller, denoted by 1 .
- the high-pressure side waterway comprises a volute, which is indicated at 2, and a penstock, which is indicated at 4.
- the pressure pipeline 4 connects to the volute casing 2 .
- the low-pressure side waterway includes a suction pipe, which is denoted by 3 .
- the axis of rotation of the impeller 1 is indicated in FIG. 1 by the vertical dashed line.
- the impeller is a Francis impeller.
- the impeller can just as well be designed differently, for example as a Kaplan impeller or as a propeller impeller.
- the pump includes a closure member, indicated at 8, capable of shutting off the flow of water through the pump.
- the closure member 8 is arranged in the high-pressure waterway.
- the closure element is a diffuser with closable guide vanes. However, it could just as well be a ball valve or some other type of valve in the pressure pipeline 4 .
- a closure element 8 designed in this way is referred to in the English language as a “main inlet valve”.
- the closure member 8 is closed before the pump is started and only opened when the pump has run up to the working speed.
- Pumps according to the invention can also comprise more than one obturator 8, e.g. In this case, the diffuser is usually closed when the pump is started.
- the pump is a pump-turbine, it typically includes a nozzle with moveable vanes.
- the pump further comprises a connection line, which is denoted by 5 and connects the high-pressure-side waterway with the low-pressure-side waterway.
- This is a bypass line, since water can pass through it from the pressure pipe 4 into the suction pipe 3 without the water passing through the impeller 1 .
- the connecting line 5 can branch off from the pressure pipeline 4, as shown in FIG. 1, or from the volute casing 2, the Connecting line 5 in any case branches off behind the closure element 8 in the pump flow direction. If the pump comprises more than one closure element 8, then the connecting line 5 branches off in the pump flow direction behind that closure element 8 which is closed before the pump is started up.
- valve 6 which is denoted by 6 and which can regulate the flow of water through the connecting line 5 .
- a twister is arranged, which is denoted by 7 .
- the twister 7 is designed in such a way that water that passes through the twister 7 in the connecting line 5 is provided with a twist as it passes through it.
- Swirl means that the water, which moves in the connecting line in the direction of the connecting line, rotates around the center line of the connecting line in addition to this movement. In other words, any sub-volume of water off the center line of the connecting pipe after the swirler follows a helical trajectory.
- the twist of the water jet causes a rotating flow to form in the suction pipe.
- the swirl of the water jet entering the suction pipe causes the water in the suction pipe to rotate.
- a counter-rotation can be generated in the water on the inlet side of the impeller, which makes it easier to start the pump and reduces vibrations when starting.
- the connecting line 5 opens into the suction pipe 3 in the region in which the axis of rotation of the impeller intersects the wall of the suction pipe 3 .
- the connecting line 5 opens into the suction pipe 3 in such a way that the connecting line 5 is aligned at the point of opening in such a way that it points in the direction of the impeller 1 . In this way, a rotating in the intake manifold 3 form water cone, which is indicated in Figure 1 by the inclined dashed lines.
- the connecting line 5 opens into the suction pipe 3 in such a way that a rotating water cone can form in the suction pipe 3, which extends in the suction pipe 3 between the opening of the connecting line 5 and the impeller 1 when water flows through the Connecting line 5 flows into the intake manifold 3.
- FIG. 1 A particularly advantageous arrangement is shown in FIG.
- the connecting line 5 is aligned exactly coaxially to the axis of rotation at the mouth. Slight deviations from this arrangement result in only a negligible impairment of the favorable effect described.
- the twister is arranged as close as possible to the mouth of the connecting line 5 in the suction pipe 3.
- the connecting line 5 is designed as a nozzle at the mouth, ie if the cross section of the connecting line 5 narrows in front of the mouth. This increases the speed at which the swirling water flows out of the connecting line 5 into the intake manifold 3 . This can increase the effective range of the resulting rotating water cone in the draft tube.
- FIG. 2 shows a possible embodiment of a twister 7 with a fixed arrangement of the twisting elements.
- the figure shows a view along the axis of the connecting line 5, with the shading only intended to clarify the representation. This means that the hatched areas are not cut surfaces.
- the twister 7 arranged in the connecting line 5 comprises four twisting elements, one of which is denoted by 7.1.
- the twisting elements 7.1 include an outside with which they are fastened to the wall of the connecting line 5.
- the twist-imparting elements can be fastened to one another or to a hub on the inside.
- the twisting elements 7.1 are fastened to a small hub, which is denoted by 7.2.
- twist-giving elements 7.1 can fulfill their purpose, they must have a corresponding inclination, above all on the outside. In addition, they can also have a curvature.
- the number of twisting elements 7.1 is arbitrary. In principle, a metal sheet bent like a screw and attached to the inner wall of the connecting line (i.e. similar to an Archimedean screw) is sufficient. In the embodiments with immovable twisting elements 7.1, the range of the generated rotating water cone in the suction pipe 3 can be adjusted by the amount of water flowing through the connecting pipe 5, i.e. with the help of the valve 6.
- FIG. 3 shows an embodiment of a twister 7 with movable twisting elements 7.1.
- the twisting elements 7.1 comprise axes which are guided through the wall of the connecting line 5 in a rotatably mounted manner.
- the number of the same should be at least two.
- the twist imparted to the water flowing through the connecting line 5 can be adjusted by rotating the elements 7.1 about their axes.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022101640.4A DE102022101640B3 (de) | 2022-01-25 | 2022-01-25 | Pumpe für ein Wasserkraftwerk |
| PCT/EP2022/084941 WO2023143795A1 (de) | 2022-01-25 | 2022-12-08 | Pumpe für ein wasserkraftwerk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4469675A1 true EP4469675A1 (de) | 2024-12-04 |
| EP4469675B1 EP4469675B1 (de) | 2025-05-28 |
Family
ID=84462763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22821554.7A Active EP4469675B1 (de) | 2022-01-25 | 2022-12-08 | Pumpe für ein wasserkraftwerk |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4469675B1 (de) |
| DE (1) | DE102022101640B3 (de) |
| WO (1) | WO2023143795A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH400043A (de) * | 1963-01-18 | 1965-09-30 | Escher Wyss Ag | Verfahren und Einrichtung zur Begrenzung der Drehzahl der Anwurfturbine einer Pumpenturbine oder Speicherpumpe |
| JPS57181974A (en) | 1981-04-30 | 1982-11-09 | Toshiba Corp | Idle running device of water turbine or pump-turbine |
| JPS6388278A (ja) * | 1986-10-02 | 1988-04-19 | Mitsubishi Heavy Ind Ltd | 水柱分離抑制方法 |
| FR2923553A1 (fr) * | 2007-11-14 | 2009-05-15 | Alstom Power Hydraulique Sa | Installation hydraulique de conversion d'energie et procede de commande d'une telle installation |
| AT508900B1 (de) * | 2010-01-19 | 2011-05-15 | Univ Wien Tech | Vorrichtung und verfahren zum entfernen von schwebstoffteilchen |
| DE102010050001A1 (de) | 2010-11-02 | 2012-05-03 | Voith Patent Gmbh | Pumpe in Francis-Bauweise für ein Wasserkraftwerk |
-
2022
- 2022-01-25 DE DE102022101640.4A patent/DE102022101640B3/de active Active
- 2022-12-08 EP EP22821554.7A patent/EP4469675B1/de active Active
- 2022-12-08 WO PCT/EP2022/084941 patent/WO2023143795A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022101640B3 (de) | 2023-01-19 |
| WO2023143795A1 (de) | 2023-08-03 |
| EP4469675B1 (de) | 2025-05-28 |
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