AT78433B - Guide vanes for Francis turbines. - Google Patents
Guide vanes for Francis turbines.Info
- Publication number
- AT78433B AT78433B AT78433DA AT78433B AT 78433 B AT78433 B AT 78433B AT 78433D A AT78433D A AT 78433DA AT 78433 B AT78433 B AT 78433B
- Authority
- AT
- Austria
- Prior art keywords
- guide vanes
- francis turbines
- wall
- piece
- francis
- Prior art date
Links
Landscapes
- Hydraulic Turbines (AREA)
Description
<Desc/Clms Page number 1>
Leitschaufeln für Francis-Turbinen.
Die Leitschaufeln regelbarer Francis-Turbinen werden als Gussstücke meistens mit vollem Querschnitt nach den Fig. 1 a und 1 b, seltener mit Aussparungen a nach den Fig. 2 a und 2 b in einem Stück gegossen ausgeführt. Das Gewicht solcher Schaufeln wird aber mit zunehmender Höhe selbst bei der Ausführung nach den Fig. 2 a und 2 b be- trächtlich, weil aus giessereitechniscben Gründen eine bestimmte Wandstärke 8 erforderlich wird.
Die Erfindung bezweckt durch Teilung der Schaufeln in ein Mittelstück A und eine Wandung W eine Verringerung der Wandstärke s und somit des Schaufelgewichtes. Die getrennte Herstellung der Leitschaufelwand ermöglicht nicht nur eine dünnwandige Ausführung in giessbaren Werkstoffen, sondern auch die Verwendung von gewalzten und gebogenen Werkstoffen. Die aus einem Stücke nach den Fig. 3 a und 3 b gebildete oder aus mehreren Teilen zusammengesetzte Schaufelwand, wofür die Fig. 4 a und Ob, 5a und 5b, 6 a und 6b Beispiele qind, wird an dem Mittelstück A befestigt, wobei die Stossfugen F in der Leitschaufelvand offers bleiben oder durch Schrauben, Nieten, Schweissung oder dgl. fest miteinander verbanden werden können.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Guide vanes for Francis turbines.
The guide vanes of adjustable Francis turbines are designed as cast pieces mostly with a full cross-section according to FIGS. 1 a and 1 b, more rarely with recesses a according to FIGS. 2 a and 2 b, cast in one piece. The weight of such blades, however, becomes considerable with increasing height, even in the embodiment according to FIGS. 2a and 2b, because a certain wall thickness 8 is required for reasons of foundry technology.
By dividing the blades into a center piece A and a wall W, the invention aims to reduce the wall thickness s and thus the blade weight. The separate production of the guide vane wall enables not only a thin-walled design in castable materials, but also the use of rolled and bent materials. The blade wall formed from one piece according to FIGS. 3 a and 3 b or composed of several parts, for which FIGS. 4 a and ob, 5a and 5b, 6 a and 6b examples qind, is attached to the center piece A, the Butt joints F remain in the guide vane wall or can be firmly connected to one another by screws, rivets, welding or the like.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT78433T | 1918-02-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT78433B true AT78433B (en) | 1919-10-10 |
Family
ID=3599991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT78433D AT78433B (en) | 1918-02-09 | 1918-02-09 | Guide vanes for Francis turbines. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT78433B (en) |
-
1918
- 1918-02-09 AT AT78433D patent/AT78433B/en active
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