AT21977B - Impeller for centrifugal pumps, fans and steam turbines. - Google Patents
Impeller for centrifugal pumps, fans and steam turbines.Info
- Publication number
- AT21977B AT21977B AT21977DA AT21977B AT 21977 B AT21977 B AT 21977B AT 21977D A AT21977D A AT 21977DA AT 21977 B AT21977 B AT 21977B
- Authority
- AT
- Austria
- Prior art keywords
- fans
- impeller
- steam turbines
- centrifugal pumps
- outlet
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/288—Part of the wheel having an ejecting effect, e.g. being bladeless diffuser
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
<Desc/Clms Page number 1>
Laufrad für Schleuderpumpen, Ventllatoren und Dampfturbinen.
Durch die Erfindung soll eine stosslose Umsetzung hoher Anstrittsgoschwindigkoiton von Flüssigkeiten, Gasen oder Dämpfen aus einzelnen oder mehrfach gekuppelten Laufrädern in Druck erzielt werden.
Die absoiute Austrittsgeschwindigkeit e (Fig. 2) schliesst mit der Tangonte an den äusseren Schaufelkreis bei A einen Winkel a ein. Bei Vergrösserung der Seitenwände über
EMI1.1
Die allmähliche Erweiterung des Austrittsquerschnittes wirkt also ähnlich, als wenn zwischen A und B feststehende Leitschaufeln eingebaut wären ; die absolute Austritts-
EMI1.2
Rades zueinander parallel oder divergierend verlaufen, so würde die Geschwindigkeitsabnahme im ersten Moment beim Verlassen der Schaufeln bei A bedeutend rascher als später gegen B zu erfolgen, so dass bei hohen Geschwindigkeiten eine stosslose Umsetzung nicht stattfinden könnto.
Um diesen Nachteil zu vermeiden, werden die Ränder der Seitenwände des Rades derart ausgebildet, dass sie den Austrittsquerschnitt zunächst unmittelbar an den äusseren Schaufelenden bei d beträchtlich verengen, um ihn erst gegen den Austrittsrand bei D auf das nötige Mass divergierend zu erweitern (Fig. 1), wodurch sich die absolute Austrittsgeschwindigkeit zwischen A und B vollkommen gleichmässig verzögert.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Impeller for centrifugal pumps, fans and steam turbines.
The invention is intended to achieve a smooth conversion of high inflow speed of liquids, gases or vapors from individual or multiple coupled impellers into pressure.
The absolute exit speed e (FIG. 2) forms an angle a with the tangent to the outer blade circle at A. When enlarging the side walls over
EMI1.1
The gradual widening of the exit cross-section has a similar effect as if fixed guide vanes were installed between A and B; the absolute exit
EMI1.2
If the wheels run parallel or diverging to one another, the decrease in speed would occur significantly faster at the first moment when leaving the blades at A than later at B, so that a smooth conversion cannot take place at high speeds.
In order to avoid this disadvantage, the edges of the side walls of the wheel are designed in such a way that they initially constrict the outlet cross-section considerably, immediately at the outer blade ends at d, in order to widen it to the necessary extent only towards the outlet edge at D (Fig. 1 ), whereby the absolute exit speed between A and B is completely evenly delayed.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT21977T | 1904-06-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT21977B true AT21977B (en) | 1905-11-10 |
Family
ID=3529793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT21977D AT21977B (en) | 1904-06-19 | 1904-06-19 | Impeller for centrifugal pumps, fans and steam turbines. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT21977B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1042384B (en) * | 1955-12-22 | 1958-10-30 | Eta Corp G M B H | Impeller for centrifugal pumps or fans |
DE1145927B (en) * | 1956-10-25 | 1963-03-21 | Eta Corp G M B H | Centrifugal wheel for pumps, blowers or the like with side blade limits narrowed to a nozzle in the meridional section |
DE2101628A1 (en) * | 1970-01-14 | 1972-06-22 | Cit Alcatel | Supersonic centrifugal compressor with high compression ratio |
WO2012123080A1 (en) * | 2011-03-11 | 2012-09-20 | Ziehl-Abegg Ag | Fan impeller |
-
1904
- 1904-06-19 AT AT21977D patent/AT21977B/en active
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1042384B (en) * | 1955-12-22 | 1958-10-30 | Eta Corp G M B H | Impeller for centrifugal pumps or fans |
DE1145927B (en) * | 1956-10-25 | 1963-03-21 | Eta Corp G M B H | Centrifugal wheel for pumps, blowers or the like with side blade limits narrowed to a nozzle in the meridional section |
DE2101628A1 (en) * | 1970-01-14 | 1972-06-22 | Cit Alcatel | Supersonic centrifugal compressor with high compression ratio |
WO2012123080A1 (en) * | 2011-03-11 | 2012-09-20 | Ziehl-Abegg Ag | Fan impeller |
DE102011013677B4 (en) * | 2011-03-11 | 2016-08-18 | Ziehl-Abegg Se | fan |
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