BE384573A - - Google Patents
Info
- Publication number
- BE384573A BE384573A BE384573DA BE384573A BE 384573 A BE384573 A BE 384573A BE 384573D A BE384573D A BE 384573DA BE 384573 A BE384573 A BE 384573A
- Authority
- BE
- Belgium
- Prior art keywords
- water
- air
- acceleration nozzle
- diameter
- ejector
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 230000001133 acceleration Effects 0.000 claims description 4
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/42—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow characterised by the input flow of inducing fluid medium being radial or tangential to output flow
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Description
<Desc/Clms Page number 1>
Ejecteur d'eau.
@ La présente invention se rapporte aux éjecteurs d'eau ser - vant à l'évacuation de l'air de la chambre à vide des installa - tiens de condensation de turbines à vapeur, machines à vapeur à pistons ou évaporateurs.
L'examen de ces éjecteurs d'eau a démontré que leur effi - cacité dépend en grande partie du rapport entre le diamètre D de la partie cylindrique a du diffuseur et le diamètre d de sortie de la tuyère d'accélération b. Si la tuyère d'accéléra - tion b est équipée d'un corps c pourvu d'ailettes hélicoïdales, il faut, suivant l'invention, donner à ce rapport D une valeur dépendant de la hauteur de chute H de l'eau motrice et de la tension partielle d'air p qui se produit par le mélange de l'air et dujet d'eau.
Dans ce qui précède on désigne par hauteur de chute H de l'eau motrice, la somme de la pression d'injection w qu'indique le manomètre m comme surpression, et de la distance verticale h comprise entre ce manomètre et le niveau de l'eau d'évacuation : donc, H" w + h mesuré en m colonne d'eau. La tension partielle
<Desc/Clms Page number 2>
d'air p est la différence entre la tension dans la chambre de mélange e et la tension de vapeur du jet d'eau moteur, mesuré en kg/cm2 .
Pour obtenir l'efficacité maximum de l'éjecteur d'eau, la proportion D doit correspondre aussi exactement que possible à la formule :
EMI2.1
4 0,16(2-7-) 0 8 4 ,lue (2 - vu- ) D . 0,84 H
<Desc / Clms Page number 1>
Water ejector.
@ The present invention relates to water ejectors serving for the evacuation of air from the vacuum chamber of condensing installations of steam turbines, piston steam engines or evaporators.
Examination of these water ejectors has shown that their efficiency largely depends on the ratio between the diameter D of the cylindrical part a of the diffuser and the outlet diameter d of the acceleration nozzle b. If the acceleration nozzle b is fitted with a body c provided with helical fins, it is necessary, according to the invention, to give this ratio D a value depending on the drop height H of the driving water and of the partial air tension p which is produced by the mixture of air and the water jet.
In the above, the head water drop height H denotes the sum of the injection pressure w indicated by the manometer m as overpressure, and the vertical distance h between this manometer and the level of l evacuation water: therefore, H "w + h measured in m water column. The partial voltage
<Desc / Clms Page number 2>
of air p is the difference between the tension in the mixing chamber e and the vapor pressure of the engine water jet, measured in kg / cm2.
To obtain the maximum efficiency of the water ejector, the proportion D should correspond as exactly as possible to the formula:
EMI2.1
4 0.16 (2-7-) 0 8 4, read (2 - seen-) D. 0.84H
Claims (1)
Publications (1)
Publication Number | Publication Date |
---|---|
BE384573A true BE384573A (en) |
Family
ID=53579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE384573D BE384573A (en) |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE384573A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2390374A1 (en) * | 1977-05-13 | 1978-12-08 | Wylain Inc | LIQUID DISTRIBUTION AND VAPOR RECOVERY SYSTEM USING AN ADVANCED SUCTION KIT |
-
0
- BE BE384573D patent/BE384573A/fr unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2390374A1 (en) * | 1977-05-13 | 1978-12-08 | Wylain Inc | LIQUID DISTRIBUTION AND VAPOR RECOVERY SYSTEM USING AN ADVANCED SUCTION KIT |
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