EP3953588B1 - Pompe à jet - Google Patents

Pompe à jet Download PDF

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Publication number
EP3953588B1
EP3953588B1 EP20719576.9A EP20719576A EP3953588B1 EP 3953588 B1 EP3953588 B1 EP 3953588B1 EP 20719576 A EP20719576 A EP 20719576A EP 3953588 B1 EP3953588 B1 EP 3953588B1
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EP
European Patent Office
Prior art keywords
propellant
wall
medium
speed
jet pump
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.)
Active
Application number
EP20719576.9A
Other languages
German (de)
English (en)
Other versions
EP3953588A1 (fr
Inventor
Daniel Kintea
Lukasz Gabrys
Christian Kahl
Gerrit Von Breitenbach
Michal Sajdak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Norma Germany GmbH
Original Assignee
Norma Germany GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Norma Germany GmbH filed Critical Norma Germany GmbH
Publication of EP3953588A1 publication Critical patent/EP3953588A1/fr
Application granted granted Critical
Publication of EP3953588B1 publication Critical patent/EP3953588B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04F5/465—Arrangements of nozzles with supersonic flow
    • 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
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • 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
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
    • 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
    • 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
    • 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
    • F04F5/464—Arrangements of nozzles with inversion of the direction of flow
    • 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
    • F04F5/54—Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type

Definitions

  • the invention relates to a jet pump comprising a driving nozzle for accelerating a driving medium, the driving nozzle having a converging inlet part and an outlet part connected to the converging inlet part, the outlet part, according to the preamble of claim 1, having an interior space enclosed by an inner wall and diverging at an opening angle includes.
  • Jet pumps use a jet of fluid from a propellant medium to suck in and accelerate a suction medium.
  • the suction effect is caused by the propellant medium flowing past the suction medium, the suction medium being carried along by the propellant medium when the flow speed of the propellant medium is sufficiently high.
  • To accelerate a propellant medium it is passed under pressure through a nozzle that accelerates the propellant medium. If the suction pressure and the driving pressure have a subcritical pressure ratio have, a convergent nozzle is used to accelerate the propellant in the jet pump.
  • a convergent-divergent nozzle a so-called Laval nozzle
  • Laval nozzle results in a deceleration of flow velocity for propellant media flowing at subsonic speeds because the divergent section of the Laval nozzle acts as a diffuser for the propellant.
  • the object of the invention is to provide an improved jet pump that allows operation at subcritical and supercritical pressure conditions.
  • the invention relates to a jet pump comprising a driving nozzle for accelerating a
  • Propellant medium wherein the propellant nozzle has a converging inlet part and an outlet part connected to the converging inlet part, the outlet part comprising an interior enclosed by an inner wall that diverges at an opening angle, the inner wall defining the opening angle directly according to a narrowest cross section at an inlet opening of the interior
  • the opening angle is designed such that a propellant medium flowing through the outlet part at subsonic speed is separated from the inner wall, the outlet part (26) not acting as a diffuser for the propellant medium flowing at subsonic speed, and a propellant medium flowing through the outlet part at supersonic speed flowing propellant medium is guided by the inner wall, with the opening angle being more than 7° and a maximum of 45°.
  • the invention provides a jet pump with a driving nozzle, the convergent inlet part of which accelerates a propellant medium flowing through the convergent inlet part, the propellant medium flowing at subsonic speed before flowing through the inlet part. If the propellant medium continues to have subsonic speed after flowing through the inlet part and accelerating therein, it also flows through the outlet part at subsonic speed.
  • the outlet part of the driving nozzle has a divergent inner wall, that is, the cross section of the outlet part increases starting from the convergent inlet part.
  • the driving nozzle can be a specially designed Laval nozzle be. The opening angle of the divergent inner wall is so large that a propellant medium flowing through the outlet part at subsonic speed separates from the inner wall of the outlet part.
  • the outlet part of the propulsion nozzle works at subsonic speeds flowing propellant medium does not act as a diffuser, so that no delay in the speed of the propellant medium is caused when it flows through the outlet part. Rather, only the convergent inlet part of the propellant nozzle acts on the propellant medium flowing at subsonic speeds.
  • the propulsion nozzle acts as a convergent nozzle on the propellant medium, which flows at subsonic speeds. If the propellant medium is accelerated to the speed of sound by the convergent inlet part, it is further accelerated by the diverging interior of the outlet part. The propellant medium is guided through the divergent inner wall of the outlet part, since in this case it is not separated from the inner wall.
  • the outlet part acts as a nozzle for the propellant flowing at supersonic speed and further accelerates the propellant. This means that the propellant nozzle acts as a Laval nozzle for propellant medium flowing at supersonic speeds.
  • the invention thus provides a jet pump that can be used both at subcritical pressure conditions, i.e. H. when the propellant medium causes the suction effect at subsonic speeds, as well as at supercritical pressure conditions, i.e. H. if the propellant medium causes the suction effect at supersonic speed, it is operated with a single propellant nozzle.
  • the effect of the outlet part on the flowing propellant medium is automatically adjusted by the opening angle of the inner wall.
  • the invention thus provides an automatic, cost-effective and simple switchover of the jet pump to different pressure conditions.
  • the inner wall of the outlet part can be designed such that the propellant flowing through the outlet part detaches from the inner wall during a transition from supersonic speed to subsonic speed.
  • the inner wall of the outlet part can be designed such that the propellant flowing through the outlet part detaches from the inner wall during a transition from a supercritical pressure ratio to a subcritical pressure ratio.
  • the inner wall of the outlet part can be designed in such a way that the propellant medium flowing through the outlet part contacts the inner wall during a transition from subsonic speed to supersonic speed and is guided by the inner wall.
  • the inner wall of the outlet part can be designed such that the propellant medium flowing through the outlet part contacts the inner wall during a transition from the subcritical pressure ratio to the supercritical pressure ratio and is guided by the inner wall.
  • a pressure ratio of a driving pressure of the driving medium to a suction pressure at the outlet part can be between 1.05 and 5, preferably between 1.1 and 2.5.
  • jet pump can be operated in a wide pressure range, whereby the pressure conditions can be subcritical or supercritical in relation to a desired suction pressure.
  • This provides sufficient suction pressure for the operation of the jet pump both at a low pressure ratio, at which the propellant flows at subsonic speed, and at a high pressure ratio, at which the propellant flows at supersonic speed.
  • the jet pump therefore has a subcritical and a supercritical operating range in which it can be operated. This means that the jet pump can be operated in a wide range of applications.
  • the opening angle is more than 7°.
  • FIG. 1 A jet pump is shown in a schematic sectional view, the jet pump being designated in its entirety with the reference number 10.
  • the jet pump 10 has a propellant medium tank 12, a propellant nozzle 14, a suction medium tank 18, a mixing chamber 20 and a diffuser 22.
  • the propellant medium is provided in the propellant medium tank 12.
  • the driving medium can be a compressible driving medium.
  • the propellant can be pressurized in the propellant tank 12 or stored under pressure in the propellant tank 12.
  • the pressure ratio can e.g. B. between 1.05 and 5, preferably between 1.1 and 2.5. Under this driving pressure, the driving medium flows from the driving medium tank 12 to the driving nozzle 14 during operation of the jet pump 10. This is represented by the arrow 30.
  • the driving nozzle 14 has a convergent inlet part 28 and an outlet part 26 with a divergent interior 40.
  • the exit part 26 and the convergent entry part 28 are connected to one another.
  • the connection point of the convergent entry part 28 with the exit part 26 has the smallest cross section of the propulsion nozzle 14.
  • the convergent entry part 28 has a tapering cross section.
  • the propellant medium initially flows into an area of the convergent inlet part 28 with a large cross section.
  • the propellant medium flowing through the convergent inlet part 28 is accelerated.
  • the driving medium is accelerated to a subsonic speed or a speed of sound by means of the convergent entry part 28 when the driving medium flows through the convergent entry part 28.
  • the exit part 26 adjoins the tapered end of the convergent entry part 28.
  • the exit part 26 includes an inner wall 38 which laterally encloses the interior 40.
  • the inner wall 38 can enclose the interior 40 in the form of a conical lateral surface, as in Figure 3a shown.
  • the inner wall 38 can enclose the interior 40 in the form of a lateral surface of a bell shape, as in Fig. 3b shown.
  • the interior 40 has an inlet opening which is connected to the outlet opening of the convergent inlet part 28. Furthermore, the interior 40 has an outlet opening that is larger than the inlet opening of the interior 40.
  • the inner wall 38 extends between the inlet opening and the outlet opening of the interior 40. The interior 40 is therefore designed to be divergent and diverges at an opening angle 16.
  • the inner wall 38 defines the opening angle 16 directly after the narrowest cross section at the inlet opening of the interior 40. The opening angle 16 of the inner wall 38 can change as the distance from the inlet opening increases.
  • the opening angle 16 is chosen so that a propellant medium flowing through the outlet part 26 at subsonic speed is released from the inner wall 38 and a propellant medium flowing through the outlet part 26 at supersonic speed is guided by the inner wall 38. i.e. the inner wall 38 does not influence a propellant medium flowing through the outlet part 26 at subsonic speed. Rather, the propellant medium flowing at subsonic speed is detached from the inner wall 38 and flows as a jet from the outlet opening of the convergent inlet part 28 through the outlet part 26 and out of the propellant nozzle 14.
  • the opening angle 16 is further selected such that a propellant medium flowing through the outlet part 26 at supersonic speed is guided by the inner wall 38.
  • An expansion of the propellant medium flowing through the outlet part 26 that occurs perpendicular to the flow direction is limited by the inner wall 38.
  • An outer area of the flow of the propellant therefore flows along the inner wall 38.
  • the opening angle 16 is at least 7°.
  • An upper limit of the opening angle 16 is between 8° and 45°.
  • the propellant medium Due to the expansion occurring perpendicular to the direction of flow and limited by the inner wall 38, the propellant medium is further accelerated and flows out of the outlet part 26 at an increased supersonic speed.
  • the propellant After exiting the outlet part 26, the propellant flows past an opening of the suction medium tank 18 and thereby causes a suction pressure.
  • the suction medium is entrained and accelerated with the propellant medium flowing past the suction medium tank 18.
  • the driving medium and the suction medium enter the mixing chamber 20. While the driving medium and the suction medium flow through the mixing chamber 20, the driving medium and the suction medium mix.
  • a diffuser 22 adjoins the mixing chamber 20, in which the propellant medium and the suction medium mixed with it are delayed.
  • the diffuser 22 includes an outlet opening 24. The propellant medium and the sauté medium can flow out of the jet pump 10 through the outlet opening 24.
  • FIGS. 2a and 2b show schematically a cross section through the driving nozzle 14, the flow of the driving medium through the driving nozzle 14 being indicated by means of streamlines 32, 34.
  • the propellant medium is in Figure 2a accelerated to the speed of sound by means of the convergent entry part 28. In the convergent entry part 28, this is indicated by the converging streamlines 32.
  • the propellant medium accelerated to the speed of sound flows from the convergent inlet part 28 into the outlet part 26.
  • the streamlines 32 diverge in the outlet part 26.
  • the outer streamlines 32 run along the inner wall 38, which indicates that the propellant medium is guided along the inner wall 38 through the interior 40.
  • the propellant medium is expanded and the speed is further increased to supersonic speed.
  • the propellant medium therefore flows out of the convergent inlet part 28 at subsonic speed.
  • the streamlines 34 condense in the convergent entry part 28.
  • the opening angle 16 of the diverging inner wall 38 is selected such that a propellant medium flowing at subsonic speed is separated from the diverging inner wall 38, the propellant is not expanded in the outlet part 26, but flows as a free jet through the outlet part 26. This is due to the Streamlines 34 are shown in the exit part 26, which run essentially parallel to one another. The free jet has an almost constant width 36 in the exit part 26.
  • the width 36 of the subsonic flow of the propellant in the outlet part 26 is therefore smaller than a clear width of the interior space 40 laterally delimited by the inner wall 38, the clear width increasing due to the diverging inner wall 38.
  • the pressure of the propellant medium in the convergent entry portion 28 may be increased or decreased during operation.
  • the inner wall 38 of the outlet part 26 is designed such that the propellant medium flowing through the outlet part 26 detaches from the inner wall 38 during a transition from the supercritical pressure ratio to the subcritical pressure ratio. Conversely, the propellant flowing through the outlet part 26 will contact the inner wall 38 during a transition from a subcritical pressure ratio to a supercritical pressure ratio and be guided by the inner wall 38.
  • the jet pump 10 can therefore be operated with both a supercritical pressure ratio and a subcritical pressure ratio.
  • a subcritical pressure ratio can be set, in which the propellant flows through the outlet part 26 at subsonic speed, the flowing propellant being detached from the inner wall 38.
  • a supercritical pressure ratio can be set in which the propellant flows through the outlet part 26 at supersonic speed, with the flowing propellant being guided through the inner wall 38.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)

Claims (4)

  1. Pompe à jet, comprenant une tuyère de propulsion (14) pour accélérer un fluide de propulsion, dans laquelle la tuyère de propulsion (14) présente une partie d'entrée convergente (28) et une partie de sortie (26) reliée à la partie d'entrée convergente (28), dans laquelle la partie de sortie (26) comprend un espace intérieur (40) entouré d'une paroi intérieure (38) et divergent selon un angle d'ouverture (16), dans laquelle la paroi intérieure (38) définit l'angle d'ouverture (16) directement selon une section transversale la plus serrée au niveau d'une ouverture d'entrée de l'espace intérieur (40),
    caractérisée en ce que l'angle d'ouverture (16) est réalisé de telle sorte qu'un fluide de propulsion s'écoulant à travers la partie de sortie (26) à une vitesse subsonique se détache de la paroi intérieure (38), dans laquelle la partie de sortie (26) n'agit pas comme un diffuseur pour le fluide de propulsion s'écoulant à une vitesse subsonique, et un fluide de propulsion s'écoulant à travers la partie de sortie (26) à une vitesse supersonique est guidé par la paroi intérieure (38), l'angle d'ouverture (16) étant supérieur à 7° et au maximum égal à 45°.
  2. Pompe à jet selon la revendication 1, caractérisée en ce que la paroi intérieure (38) de la partie de sortie (26) est réalisée de telle sorte que le fluide de propulsion s'écoulant à travers la partie de sortie (26) se détache de la paroi intérieure (38) lors d'un passage d'une vitesse supersonique à une vitesse subsonique.
  3. Pompe à jet selon la revendication 1 ou 2, caractérisée en ce que la paroi intérieure (38) de la partie de sortie (26) est réalisée de telle sorte que le fluide de propulsion s'écoulant à travers la partie de sortie (26) s'applique contre la paroi intérieure (38) lors d'un passage d'une vitesse subsonique à une vitesse supersonique et est guidé par la paroi intérieure (38).
  4. Pompe à jet selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'un rapport de pression entre une pression de propulsion du fluide de propulsion et une pression d'aspiration après la partie de sortie (26) est compris entre 1,05 et 5, de préférence entre 1,1 et 2,5.
EP20719576.9A 2019-04-08 2020-03-30 Pompe à jet Active EP3953588B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019109195.0A DE102019109195A1 (de) 2019-04-08 2019-04-08 Strahlpumpe
PCT/EP2020/058994 WO2020207847A1 (fr) 2019-04-08 2020-03-30 Pompe à jet

Publications (2)

Publication Number Publication Date
EP3953588A1 EP3953588A1 (fr) 2022-02-16
EP3953588B1 true EP3953588B1 (fr) 2023-12-06

Family

ID=70292939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20719576.9A Active EP3953588B1 (fr) 2019-04-08 2020-03-30 Pompe à jet

Country Status (8)

Country Link
US (1) US11905978B2 (fr)
EP (1) EP3953588B1 (fr)
JP (1) JP7472165B2 (fr)
KR (1) KR102649754B1 (fr)
CN (1) CN113614386B (fr)
DE (1) DE102019109195A1 (fr)
MX (1) MX2021011742A (fr)
WO (1) WO2020207847A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021005770A1 (de) 2021-11-22 2023-05-25 Serge Olivier Menkuimb Neuartiges und regeneratives Energieerzeugungskühlsystem
KR20230171701A (ko) * 2022-06-14 2023-12-21 주식회사 엘지에너지솔루션 가스 벤팅 장치, 이를 포함하는 배터리 모듈 및 배터리 팩

Citations (1)

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FR1322879A (fr) * 1962-02-10 1963-04-05 Bertin & Cie Perfectionnements aux trompes

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Publication number Priority date Publication date Assignee Title
FR1322879A (fr) * 1962-02-10 1963-04-05 Bertin & Cie Perfectionnements aux trompes

Also Published As

Publication number Publication date
CN113614386B (zh) 2024-01-23
KR102649754B1 (ko) 2024-03-20
CN113614386A (zh) 2021-11-05
JP2022526627A (ja) 2022-05-25
KR20210139453A (ko) 2021-11-22
EP3953588A1 (fr) 2022-02-16
JP7472165B2 (ja) 2024-04-22
US11905978B2 (en) 2024-02-20
WO2020207847A1 (fr) 2020-10-15
MX2021011742A (es) 2021-10-22
DE102019109195A1 (de) 2020-10-08
US20220213904A1 (en) 2022-07-07

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