EP0793780B1 - Überschallvorrichtung - Google Patents
Überschallvorrichtung Download PDFInfo
- Publication number
- EP0793780B1 EP0793780B1 EP95929721A EP95929721A EP0793780B1 EP 0793780 B1 EP0793780 B1 EP 0793780B1 EP 95929721 A EP95929721 A EP 95929721A EP 95929721 A EP95929721 A EP 95929721A EP 0793780 B1 EP0793780 B1 EP 0793780B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive nozzle
- supersonic device
- mixer
- supersonic
- nozzle
- 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.)
- Expired - Lifetime
Links
Images
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
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
- F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
- F04F5/22—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating of multi-stage type
Definitions
- the invention relates to a supersonic device with an elongate tubular Mixer and diffuser housing, in which a first axially and in series with one Displacement body provided second propelling nozzle is arranged, with both propelling nozzles in each are arranged in a cylindrical region of the mixer and diffuser housing.
- a supersonic device of this type is known from GB-A-3025525
- De 30 25 525 Al is an ejector device known, made of at least two of a corresponding number axially one on the other following ejectors of increasing size formed within a common elongated housing known, which according to the modular system of several in Sections adjoining one another in the longitudinal direction and combinable with one another as desired consists of at most one transverse wall.
- This known from Scripture Ejector device is used, for example, to generate overpressure and underpressure during mechanical movement of sheets of paper used in print shops, so only for production of very low pressures, i.e. very small pressure ratios, and very small ones Flows.
- the conversion of pressure into kninetic energy taking place in the nozzles is small and not comparable to high-performance supersonic nozzles, the big one Can generate pressure conditions.
- a classic supersonic device with two driving nozzles is from the dissertation H.R. Solver the Technical University of Darmstadt, November 8, 1965.
- the one from this writing resulting supersonic device has the design of a conventional two stage supersonic, which consists of two individual stages with central primary nozzles and cylindrical mixing chambers. Connects to the mixing chamber of the second stage the usual subsonic cone diffuser.
- the delay from the first stage emerging flow of the two-stage supersonic ejector is in a subsonic double-cone diffuser made of the constructive connection of the individual stages represents.
- the two-stage supersonic ejector is still burdened with the disadvantage that in first supersonic diffuser delayed lossy first and then in the subsequent part is accelerated again.
- the invention has for its object to provide a supersonic device in which constructively simple means a significant increase in performance in relation to driving medium to be used is achieved.
- Both are in the supersonic device according to the invention
- Driving nozzles each in a cylindrical area of the mixer and diffuser housing arranged.
- the second propellant is one conical displacement body in the form of a supersonic cone or wedge connected upstream, the tip or cutting edge in the conically tapered first mixing zone of the diffuser protrudes so far that it still part of the Core jet of the first propellant nozzle reached.
- tandem emitter With the integrated form of the tandem emitter according to the invention with supersonic cone or Turkey diffuser works considerably less loss than the classic mixer with impact diffuser tube. Furthermore, the overall length of the integrated tandem radiator smaller than the known ones, including the two-stage Systems. They also achieve conical DC mixing chambers significantly better efficiencies than the known cylindrical ones Mixing chambers for high-performance jet pumps.
- the dimensions are at least 0.8 times smaller second driving nozzle is in the first transonic area of the Arranged in tandem.
- This cylindrical part extends extends beyond the nozzle end of the second drive nozzle, So far that the second mixing zone just does not touch becomes.
- This cylindrical part of the diffuser housing closes then the conically tapering part of the mixing zone 2 followed by the second transorsal area finally the subsonic diffuser connects.
- the second propellant nozzle is by at least three, preferably for securely fixing the spotlight with a total of six struts attached to the housing.
- One of the struts is as Steam supply line trained.
- the housing 20 has a first cylindrical part 21 for load current supply, on it subsequent second cylindrical part 22 in the area of trans-mixing zone, followed by a second Mixer part 24, a shock diffuser 25 and finally one Subsonic diffuser 26 follows.
- the first driving nozzle 11 is in the first cylindrical part 21 arranged.
- the supersonic device also has an in Series connected and inside the second cylindrical Part 22 arranged second drive nozzle 12.
- the blowing nozzle 12 is on struts 15, 16 on the cylindrical part 21 of the housing 20 attached.
- struts 15 arranged at the head and foot end of the driving nozzle 12, one of which is designed as a propellant supply strut 16, which is connected to the tubular propellant supply 13.
- the second drive nozzle 12 has the drive nozzle 11 on it inclined end face a conical or wedge-shaped Displacement body 14 with a half angle ⁇ and Total length 1 on.
- the letter A is the distance between the mouth the second drive nozzle 12 to the outlet mouth of the second Mixing part 24 denotes.
- Fig. 2 shows in detail the attachment of the second Driving nozzle 12 in the cylindrical part 22 of the mixer and Diffuser housing.
- the head and foot end of the propellant nozzle 12 struts 15 are arranged, of the one is designed as a propellant supply strut 16 which the tubular propellant supply 13 is connected.
- the struts at a strut angle ⁇ arranged at right angles in the lower part of the picture.
- Section A-A shows the cross-sectional area of a strut 15, which is designed and arranged in such a way that the flowing medium as little resistance as possible is opposed.
- the cross-sectional area spatially formed, in the lower part the areas inclined to the flow are larger and with a more acute angles to each other than the other two Surfaces.
- the section B-B shows that the circumference of the driving nozzle as a whole three struts are distributed, namely two struts 15 and one Propellant supply strut 16 within the second cylindrical Part 22.
- FIG. 3 shows the structure of the mixer and diffuser housing 20 as in Fig. 1 in a perspective view.
- Housing 20 is in the area of the first cylindrical part 21 a propellant nozzle 11 arranged which is rectangular Has outlet cross-section. It is also connected in series a second driving nozzle 12, which is also a rectangular one Has outlet cross-section and has a housing size, which on the narrow sides directly up to the housing wall of the second cylindrical part 22 protrudes.
- a displacement body 14 On the front side of this rectangular second drive nozzle 12 is a displacement body 14 arranged in the form of a wedge 18 with an angle ⁇ is less than 5 °. The cutting edge of the wedge 18 is there perpendicular to the rectangular outlet cross section of the driving nozzle 11 arranged.
- the propellant supply 13 is directly through the wall of the housing 20 and the drive nozzle 12 out.
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)
- Percussion Or Vibration Massage (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Nozzles (AREA)
Description
Die Unteransprüche sind vorteilhafte Weiterbildungen der Überschallvorrichtung. Bei der erfindungsgemäßen Strahlpumpe ragt die Spitze des Verdrängungskörpers der zweiten in Reihe geschalteten Treibdüse in die Kem- und Mischzone der ersten Treibdüse hinein. Durch diese Anordnung der mit dem Verdrängungskörper versehenen zweiten Treibdüse werden Verluste durch Abbau der senkrechten Verdichtungsstöße vermieden. Durch diesen Abbau der senkrechten Verdichtungsstöße wird eine erhebliche Drucksteigerung dieser in Form eines Tandems aufgebauten Strahlpumpe erreicht. Während bisherige Hochleistungs-Strahlpumpen überlicherweise ein Druckverhältnis von maximal π = 12 aufweisen, lassen sich beim Tandemstrahler bei gleichem Treibdampfverbrauch Druckverhältnisse von π = 20 - 30 erzielen. Darüber hinaus benötigt der Tandemstrahler ausgelegt beispielsweise für ein Druckverhältnis von π = 12, nur etwa die halbe Dampfmenge des konventionellen Strahlers, was bei einer Anlage mit zwei Stufen bereits eine Gesamtdampfersparnis von etwa 70% bedeutet.
Claims (14)
- Überschallvorrichtung mit einem langgestreckten rohrförmigen Mischer- und Diffusorgehäuse (20), in dem axial eine erste (11) und zu dieser in Reihe eine mit einem Verdrängungskörper (14) versehene zweite Treibdüse (12) angeordnet ist, wobei beide Treibdüsen (11, 12) in je einem zylindrischen Bereich (21, 22) des Mischer- und Diffusorgehäuses (20) angeordnet sind, dadurch gekennzeichnet,
daß sich an dem die erste Treibdüse (11) einhüllenden Gehäuseteil (21) ein konisch sich verjüngender, eine erste Mischzone (32) umhüllender Gehäuseteil (23) anschließt, und daß in diesen konischen Gehäuseteil (23) der mit der zweiten Treibdüse (12) verbundene Verdrängungskörper (14) hineinragt. - Überschallvorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß der Verdrängungskörper (14) eine Länge (L) aufweist, die dem 0,4 - 0,5fachen der Länge (L) des ersten Mischerteils (23) entspricht. - Überschallvorrichtung nach Anspruch 2,
dadurch gekennzeichnet.
daß der Verdrängungskörper (14) als Konus ausgebildet ist und einen Halbwinkel von α kleiner 5° aufweist. - Überschallvorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß der Verdrängungskörper (14) als Keil (18) ausgebildet ist und einen Halbwinkel α von kleiner 5° aufweist. - Überschallvorrichtung nach Anspruch 4,
dadurch gekennzeichnet,
daß der Keil (18) eine Breite (B) besitzt, die dem Durchmesser (D) des ersten Mischerteils (23) des Mischer- und Diffusorgehäuses (20) entspricht. - Überschallvorrichtung nach Anspruch 5,
dadurch gekennzeichnet,
daß eine Treibmittelzufuhr (13) vorgesehen ist, die unmittelbar an die zweite Treibdüse (12) anschließbar ist. - Überschallvorrichtung nach einem der vorgenannten Ansprüche,
dadurch gekennzeichnet,d
aß die erste Treibdüse (11) einen rechteckigen Austrittsquerschnitt besitzt und dabei in der Weise angeordnet ist, daß die lange Kante senkrecht zur Schneide des Keils (18) steht. - Überschallvorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß der zylindrische zweite Gehäuseteil (22) im Bereich der zweiten Treibdüse (12) in Strömungsrichtung sich über das Düsenende hinaus bis 0,4 - 0,6 des Abstandes (A) der zweiten Treibdüse (12) zum an den zweiten Mischerteil (24) anschließenden Stoßdiffusorbereich (25) erstreckt. - Überschallvorrichtung nach Anspruch 3,
dadurch gekennzeichnet,
daß die zweite Treibdüse (12) durch mindestens drei am Umfang verteilte Streben (15) am zweiten zylindrischen Teil (22) befestigt ist, wobei eine Strebe (15) als Treibmittelzufuhrstrebe (16) ausgebildet ist. - Überschallvorrichtung nach Anspruch 9,
dadurch gekennzeichnet,
daß die Streben (15, 16) ein die Strömung minimal behinderndes Profil aufweisen. - Überschallvorricntung nach Anspruch 10,
dadurch gekennzeichnet.
daß die Streben (15, 16) im Querschnitt rhombusförmit ausgestaltet sind. - Überschallvorrichtung nach Anspruch 11,
dadurch gekennzeichnet,
daß die strömungszugeneigten Flächen des rhombischen Querschnitts der Streben (15, 16) einen kleineren Winkel zueinander aufweisen, als die der Strömung abgeneigten Flächen. - Überschallvorrichtung nach Anspruch 10,
dadurch gekennzeichnet,
daß die Streben (15, 16) an der zweiten Treibdüse (12) in Strömungsrichtung unter einem Winkel β von kleiner 70° angeordnet sind. - Überschallvorrichtung nach Anspruch 1.
dadurch gekennzeichnet,
daß die zweite Treibdüse (12) im Querschnitt mindestens um den Faktor 0,8 kleiner ist als die erste Treibdüse (11).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4430574A DE4430574C2 (de) | 1994-08-18 | 1994-08-18 | Strahlpumpe mit zwei Überschalldüsen |
DE4430574 | 1994-08-18 | ||
PCT/DE1995/001160 WO1996006285A1 (de) | 1994-08-18 | 1995-08-18 | Überschallvorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0793780A1 EP0793780A1 (de) | 1997-09-10 |
EP0793780B1 true EP0793780B1 (de) | 1999-10-20 |
Family
ID=6526790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95929721A Expired - Lifetime EP0793780B1 (de) | 1994-08-18 | 1995-08-18 | Überschallvorrichtung |
Country Status (7)
Country | Link |
---|---|
US (1) | US5839884A (de) |
EP (1) | EP0793780B1 (de) |
JP (1) | JP3137986B2 (de) |
AT (1) | ATE185880T1 (de) |
AU (1) | AU3339895A (de) |
DE (2) | DE4430574C2 (de) |
WO (1) | WO1996006285A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10050697A1 (de) * | 2000-10-13 | 2002-04-18 | Alstom Switzerland Ltd | Verfahren und Vorrichtung zur isothermen Kompression eines gasförmigen Mediums |
KR100801658B1 (ko) | 2006-09-19 | 2008-02-05 | 한국에너지기술연구원 | 연료전지용 양방향 가변노즐 이젝터 |
CA2560814C (en) * | 2006-09-25 | 2014-08-26 | Transcanada Pipelines Limited | Tandem supersonic ejectors |
WO2009008776A1 (ru) * | 2007-07-06 | 2009-01-15 | Obschestvo S Ogranichennoi Otvetstvennostju 'akva-Piro-Alyans' | Ствол для получения струй аэрозольного распыла |
RU2348871C1 (ru) * | 2007-08-22 | 2009-03-10 | Вадим Иванович Алферов | Устройство для сжижения и сепарации газов |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE313020C (de) * | ||||
DE322838C (de) * | 1918-05-31 | 1920-07-09 | Aeg | Strahlpumpe |
DE662250C (de) * | 1936-01-21 | 1938-07-09 | Gerhard Fehst Dipl Ing | Strahlverdichter, bei welchem dem anzusaugenden Mittel vor dem Zusammentreffen mit dem Treibmittel eine gewisse Geschwindigkeit erteilt ist |
US2111266A (en) * | 1936-12-28 | 1938-03-15 | Thomas S Hopkins | Draft inducer |
US2424722A (en) * | 1944-09-16 | 1947-07-29 | Youngstown Welding & Engineeri | Jet for tanks and the like |
US2602398A (en) * | 1947-10-17 | 1952-07-08 | Alfred E Nittka | Jet booster pump |
DE1081182B (de) * | 1959-02-14 | 1960-05-05 | Siemens Ag | Aus Dampf- und Wasserstrahlsauger bestehendes Strahleraggregat |
DE1268307B (de) * | 1961-07-01 | 1968-05-16 | Koerting Ag | Strahlpumpe |
US3371618A (en) * | 1966-02-18 | 1968-03-05 | Chambers John | Pump |
DE3025525A1 (de) * | 1980-07-05 | 1982-01-28 | Jürgen 4477 Welver Volkmann | Ejektorvorrichtung |
US4379679A (en) * | 1980-12-01 | 1983-04-12 | United Technologies Corporation | Supersonic/supersonic fluid ejector |
GB2100351A (en) * | 1981-06-17 | 1982-12-22 | British Nuclear Fuels Ltd | Steam ejector pumping system |
US4487553A (en) * | 1983-01-03 | 1984-12-11 | Fumio Nagata | Jet pump |
DE4400958C1 (de) * | 1994-01-14 | 1995-04-06 | Bayerische Motoren Werke Ag | Saugstrahlpumpe |
-
1994
- 1994-08-18 DE DE4430574A patent/DE4430574C2/de not_active Expired - Fee Related
-
1995
- 1995-08-18 AU AU33398/95A patent/AU3339895A/en not_active Abandoned
- 1995-08-18 WO PCT/DE1995/001160 patent/WO1996006285A1/de active IP Right Grant
- 1995-08-18 EP EP95929721A patent/EP0793780B1/de not_active Expired - Lifetime
- 1995-08-18 JP JP08507707A patent/JP3137986B2/ja not_active Expired - Fee Related
- 1995-08-18 US US08/776,988 patent/US5839884A/en not_active Expired - Fee Related
- 1995-08-18 AT AT95929721T patent/ATE185880T1/de active
- 1995-08-18 DE DE59507105T patent/DE59507105D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0793780A1 (de) | 1997-09-10 |
ATE185880T1 (de) | 1999-11-15 |
JP3137986B2 (ja) | 2001-02-26 |
JPH10504368A (ja) | 1998-04-28 |
WO1996006285A1 (de) | 1996-02-29 |
US5839884A (en) | 1998-11-24 |
AU3339895A (en) | 1996-03-14 |
DE4430574C2 (de) | 1996-07-18 |
DE59507105D1 (de) | 1999-11-25 |
DE4430574A1 (de) | 1996-02-22 |
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