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EP0740081B1 - Mini pompe à jet - Google Patents

Mini pompe à jet Download PDF

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Publication number
EP0740081B1
EP0740081B1 EP96101626A EP96101626A EP0740081B1 EP 0740081 B1 EP0740081 B1 EP 0740081B1 EP 96101626 A EP96101626 A EP 96101626A EP 96101626 A EP96101626 A EP 96101626A EP 0740081 B1 EP0740081 B1 EP 0740081B1
Authority
EP
European Patent Office
Prior art keywords
jet pump
housing
seat
guide part
wall
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
Application number
EP96101626A
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German (de)
English (en)
Other versions
EP0740081A1 (fr
Inventor
Manfred Gärtner
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.)
Helmut Baelz GmbH
Original Assignee
Helmut Baelz 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 Helmut Baelz GmbH filed Critical Helmut Baelz GmbH
Publication of EP0740081A1 publication Critical patent/EP0740081A1/fr
Application granted granted Critical
Publication of EP0740081B1 publication Critical patent/EP0740081B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04F5/461—Adjustable nozzles

Definitions

  • the jet pumps are cooled down via their suction connection Heating medium supplied with the as a blowing agent serving heat carrier mixes and so the heating medium for the lead with the right pressure and the right one Temperature.
  • the jet pumps are for coordinated with the respective application, i.e. on the print of the heating medium to be processed and on the energy requirement of the connected heat consumers precisely set.
  • the jet pumps are dimensioned accordingly, which, conversely, means that these are for smaller ones Heat consumers, for example, only 15 kW heat output lose weight, cannot be used.
  • the jet pumps would only use a fraction of the throughput work for which they are dimensioned, so that if they work at all, they are safe to operate cannot be reached.
  • Jet pumps must, however, if they are reliable and should work with low noise, precisely dimensioned and be manufactured. Even minor inaccuracies can cause unpleasant noises during operation, which undesirable especially for heating systems in the living area is. Despite the resulting high precision requirements and the variety of applications with different Working conditions must be the price of the jet pumps be acceptable.
  • Jet pump From DE-A-3618601 is a jet pump according to the preamble of claim 1 known.
  • the previously known Jet pump has a pump housing with a partition in which a threaded opening for receiving a propellant nozzle is trained.
  • a diffuser On the downstream side of the A nozzle is held in the pump housing, a diffuser. A suction connection leads to this from the side.
  • the pump housing On the upstream side of the nozzle the pump housing has a further threaded opening leading to the outside on in which a head piece or guide piece sits. This serves to guide a valve spindle, the conical end cooperates with the propellant nozzle opening, to adjust the propellant flow.
  • the pump housing be opened from the diffuser side and the The propellant nozzle can then be unscrewed.
  • CH-A-135022 is also a water jet air pump with a pump housing known by a Partition into an inflow space and an inlet and outlet side Space is divided.
  • the partition wall knows an opening on which a nozzle insert is held.
  • the nozzle insert is provided with a nozzle opening, in which is a throttle body adjustable. For actuation serves a handwheel, the spindle of which passes through the pump housing is led to the outside.
  • the entire housing of the jet pump i.e. both of them
  • the outer wall and its partition can be used in this Be designed as a simple casting. This includes both the blowing agent connection arranged in the outer wall and the suction connection, as well as the outlet.
  • Such a housing simple and inexpensive for example Sand casting process. As materials come for that brass or bronze in question. Other materials can also be used.
  • a mixing tube and diffuser Pipe piece provided, which is preferably detachable with the outlet is connected so that it can be replaced if necessary is.
  • the jet pump can be operated simply Swap the pipe sections, but especially by swapping of use, to different applications and stress cases be adjusted.
  • the jet pump does not need from connected pipes to be separated. Therefore, subsequent adjustment work e.g. by changing inserts or pipe sections, very easy.
  • the structure of the jet pump is overall simple.
  • the Insert that defines a propellant nozzle with its valve opening, is between the guide part that acts as a head piece is held at the first seat opening, and the partition clamped. This means that both when assembling the jet pump as well as when switching to other maximum outputs by simply changing the insert only the closure or guide part removed and the insert must be replaced. This is without further Fasteners held in the housing so that it after removing the guide part without the aid tools can be removed from the housing. Conversely, when it is assembled, it is simply inserted into the housing inserted without special measures for its attachment or sealing would have to be taken.
  • the locking member slidably mounted on the guide part interacts with the valve opening and enables it to adapt both the jet pump to partial load cases as well as to shut it down completely.
  • the second seat opening arranged coaxially to the outlet.
  • the seat can in principle be of any design. However, it is advantageous if he concentric of one the second seat opening surrounding plane surface is formed. This is too with a very thin-walled partition wall in a simple way producible, the corresponding tool used for this inserted into the housing through the first seat opening can be.
  • the second seat opening is then simple Cylinder bore formed, which fixes the insert laterally.
  • the insert is designed so that it has a Has fluid passages provided wall, the compressive forces from the guide part to a corresponding one on the Seat adjacent bulkhead can transfer the valve opening having.
  • the use for example, also cage-like can be trained in his at small and medium Series of the most favorable design in terms of production technology hollow cylinder open on one side, in the front wall of which Nozzle opening is provided and the wall of the inlet bores having.
  • the number of inflow bores and their Cross section is dimensioned so that it is the flow don't throttle.
  • the lateral fixation of the insert the dividing wall is served by an annular shoulder facing the dividing wall, which is dimensioned according to the seat.
  • An on the ring shoulder arranged O-ring prevents shunts to the valve opening. This O-ring is pressed on to the seat by placing the guide part with a flat surface against an annular, flat pressure surface presses, whereby the use against the Seat is pressed.
  • the guide part is preferably at the first seat opening held by a threaded connection, which means an O-ring is sealed.
  • the valve closure member is a in the simplest case Adjustment cone or with smaller diameters of the valve opening a nozzle needle that is longitudinally displaceable in the guide part is led. It has proven to be beneficial proved to provide the guide part with a spring means, the closure member towards its open position preloaded. To regulate or stop the jet pump then only pressure on the end of the guide part protruding shaft can be exercised. The initiation of Tensile forces are not required, so that appropriate Actuators can be connected particularly easily. These only need one end on the Shaft pressing element.
  • Jet pump in case of failure of the heating medium actuator lets through so that in the event of a fault the heating effect of the Systems is ensured. In this way, for example. Frost damage can be excluded. But it is also possible the nozzle needle on its shaft as a threaded spindle form with a provided on the guide part Thread is engaged and with a rotary drive connected is.
  • the capture nozzle and the diffuser can be done by one formed the outlet on the housing pipe section be with its first end towards the partition extends and with its second end from the outlet of the housing protrudes.
  • a diffuser taken on its own can be manufactured precisely, represents the right one and quiet operation of the jet pump safely while lower accuracy requirements are imposed on the housing have to be manufactured as a casting can be. It is also possible to have different Provide diffuser lengths or diameters.
  • the jet pump becomes particularly cost-effective if as the housing, the standard housing of a three-way valve or other tap is used.
  • Essential is that the housing has three connectors, a partition and has an access opening.
  • Such housings are As a standard part from mass production inexpensively available. This makes the jet pump particularly suitable for heat consumers with customer groups of, for example, only 5 kW. They are e.g. connected to a district heating network Detached houses where the jet pumps are an unmanageable Number of otherwise constantly and often uselessly running electrical circulation pumps can replace.
  • the standard ones Cast housings are with just a few processing steps simply by attaching the mentioned seat and the installation of the insert and the diffuser in connection with a corresponding guide part or head piece rebuilt a jet pump.
  • a jet pump for mixing heating media Heat consumers with lower heat requirements will be below Receive use of a commercially available valve housing, by a seat on the partition in the housing is incorporated for use.
  • the stake will via a larger, internally threaded bore in the Housing inserted and one screwed into this opening Head part pressed against the seat and thereby held.
  • the insert has a serving as a driving nozzle Valve opening on which is a nozzle cone held on the head assigned.
  • a tube serves as a catch nozzle a flange and a union nut on one the housing existing outlet is held.
  • a jet pump 1 is shown
  • the Housing 3 is a cast metal housing of a commercially available three-way valve.
  • the housing 3 encloses an interior 5, which is separated by a partition 7 into a first section 9 and a second section 11 is divided.
  • the interior 5 is delimited by an outer wall 13, which is formed in one piece with the partition 7.
  • the first section 9 of the interior 5 carries a propellant connection 15, of a short, from the housing 3 projecting pipe section 17 is formed.
  • the pipe section 17 is on the outside with an external thread 18 provided to connect additional flanges, pipes or to enable similar parts, for example by means of union nuts.
  • a suction port 21 is provided, the also from a short, protruding from the housing 3 Pipe section 23 is formed, the circumference with an external thread 24 is provided.
  • the suction port 21 opens into the second section 11 of the interior 5 and is thus from the propellant port 15 through the Partition 7 separated.
  • the housing 3 is provided with an internal thread 35
  • Seat opening 37 provided in the first section 9 leads the interior 5 and through a closure piece or guide part 39 closed and by means of an O-ring 41 is sealed.
  • the guide part 39 has a partition 7 facing Flat surface 43 on which one in detail Fig. 3 shown, between the partition 7 and the Guide part 39 held insert 45 with its annular plan pressure surface 47 is present. With his other, the insert sits on the side parallel to the printing surface 47 45 in a second seat opening 49 which is in the partition 7 provided and arranged coaxially to the longitudinal central axis 26 is.
  • the seat opening 49 is of a seat for the Insert 45 serving annular flat surface 51, which are approximately one to a few millimeters into the Partition 7 is embedded.
  • the flat surface 51 is there parallel to the flat surface 43 of the guide part 39.
  • the insert 45 shown separately in FIG. 3 has on its side facing the partition 7 one of a Ring shoulder 53 surrounding end wall 55, in one conical, located in the second section 11 of the interior 5 tapering nozzle opening 57 is arranged.
  • the Ring shoulder 53 defines a cylindrical on the end wall 55 Section 59, its diameter is dimensioned that he with play in the seat opening 49th can be used.
  • the height is such that the end wall 55 in the second section 11 of the interior 5 is essentially smooth with the partition 7.
  • the partition 7 faces Side of the ring shoulder 53 provided with an annular groove 61, in which an O-ring can be inserted.
  • a longitudinally displaceable shaft 65 is held, performed by the guide member 39 sealed is. Its end protruding out of the guide part 39 67 is used to adjust the jet pump 1 and thus the Adaptation to different load cases.
  • the other in the Interior 5 protruding end of the shaft 65 carries a nozzle needle 69, which serves as an adjusting member and is dimensioned so that it can completely close the nozzle opening 57.
  • the nozzle needle 69 has a narrow annular area with a larger cone angle, to which there is an area 71 after the shaft 65 smaller diameter connects. This can be done with the Nozzle opening 57 cooperate sealingly so that the Jet pump 1 can be stopped completely.
  • a coil spring Inside the guide member 39 is a coil spring arranged, which biases the shaft 65 outwards, so that the adjusting cone 69 to its open position is too preloaded.
  • a not shown, external drive or actuating device sets the operating point the jet pump 1 a by the shaft 65 more or less far into the guide member 39.
  • a pipe section 73 Opposite and with the nozzle opening 57 delimiting an annular gap, a pipe section 73 is arranged, that acts as a catch nozzle, mixing tube and diffuser and which is held at the outlet 27.
  • the diameter of the Pipe piece 73 is considerably less than that of Pipe section 29.
  • the length of the pipe section 73 exceeds however, the length of the pipe section 29 clearly.
  • the pipe section 73 For fastening the pipe section 73 to the outlet 27 is the pipe section 73 with a disk-shaped flange 75 provided with the interposition of seals by means of a union nut 77 held on the pipe section 29 is.
  • the union nut 77 holds a connecting pipe 79, which protrudes from the housing 3 part of the pipe piece 73 surrounds and that for connection with other parts is provided with an external thread 81.
  • the jet pump 1 described so far is on simple way using a conventional valve body made by already working with everyone External threads 18, 24, 31 provided cast body as a seat serving flat surface 51 on the partition 7, for example Milling trained and the seat opening 49 to the required Dimension is drilled.
  • the one with in the annular groove 61 insert 45 provided with an O-ring is replaced by the first Seat opening 37 placed on the partition 7, so that be Section 59 sits in the seat opening 49.
  • the insert 45 is held and closed the housing 3.
  • To complete the Jet pump is only the pipe section 73 in the Insert outlet 27 and 77 by means of the union nut to back up.
  • the pipe section 73 and the insert 45 can be used without the help of more complicated or special tools change. Changes to the case are not mandatory. E.g. is only from a stock of inserts 45, the valve openings 57 with different Have diameters for the specific Use case just selected suitable insert and in the housing 3 used. The same applies to the pipe section 73, which in different versions, i.e. With different diameters and lengths can be.
  • the jet pump can be used to change the pipe section 1 remain installed in a pipe network, only one pipe connected to the connecting pipe 79 is to be loosened. On in this way a simple modular system is created, with the jet pumps in a simple and inexpensive way for the intended purpose using Standard parts or a few additional parts put together can be.

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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)
  • Percussion Or Vibration Massage (AREA)

Claims (21)

  1. Pompe à jet (1)
    avec un corps (3) monobloc dont la paroi extérieure (13) délimite une chambre intérieure (5) qui est divisée en un premier tronçon (9) et un second tronçon (11) par une paroi de séparation (7) liée d'une pièce au corps (3),
    avec un raccord à fluide moteur (15) qui est disposé dans la paroi extérieure, est en communication sur le plan de l'écoulement avec le premier tronçon (9) de la chambre intérieure (5) et est réalisé d'une pièce avec le corps (3),
    avec un raccord d'aspiration (21) qui est disposé dans la paroi extérieure (13), est en communication sur le plan de l'écoulement avec le second tronçon (11) de la chambre intérieure (5) et est réalisé d'une pièce avec le corps (3),
    avec une sortie (27) qui est disposée dans la paroi extérieure (13), est en communication sur le plan de l'écoulement avec le second tronçon (11) de la chambre intérieure (5) et est réalisée d'une pièce avec le corps (3),
    avec un diffuseur (73) qui est disposé dans la sortie (27), est lié de manière séparable à celle-ci et présente une tuyère d'écoulement tournée vers la paroi de séparation (7),
    avec une première ouverture de siège (37) qui mène au premier tronçon (9) de la chambre intérieure (5) à travers la paroi extérieure (13),
    avec une seconde ouverture de siège (49) qui traverse la paroi de séparation (7), est entourée d'un siège (51) et est située à distance de la première ouverture de siège (37),
    avec un insert (45) disposé de manière séparable sur le siège (51), qui comporte un orifice de tuyère (57), par lequel le premier tronçon (9) de la chambre intérieure (5) communique sur le plan de l'écoulement avec le second tronçon (11),
    avec un élément de guidage (39) fixé de manière séparable dans la première ouverture de siège (37), qui guide un organe de réglage (69) avec possibilité de coulissement dans la direction longitudinale,
    caractérisée par le fait que
    l'insert (45) peut être pressé par l'élément de guidage (39) contre le siège (51) qui lui est associé.
  2. Pompe à jet selon la revendication 1, caractérisée par le fait que le raccord d'aspiration (21) est disposé en vis-à-vis du raccord de fluide moteur (15) et est disposé coaxialement avec celui-ci.
  3. Pompe à jet selon la revendication 1, caractérisée par le fait que la première ouverture de siège (37) est disposée du côté du corps (3) opposé à la sortie (27) et est disposée coaxialement avec la sortie (27).
  4. Pompe à jet selon la revendication 1, caractérisée par le fait que la seconde ouverture de siège (49) est disposée coaxialement avec la sortie (27).
  5. Pompe à jet selon la revendication 1, caractérisée par le fait que le siège (51) est une surface plane (51) qui entoure de manière concentrique la seconde ouverture de siège (49).
  6. Pompe à jet selon la revendication 1, caractérisée par le fait que la seconde ouverture de siège (49) est un trou cylindrique.
  7. Pompe à jet selon la revendication 1, caractérisée par le fait que l'insert (45) a la forme d'un cylindre creux ouvert d'un côté qui, à une extrémité, est pourvu d'une paroi frontale (55) pourvue d'un trou formant l'ouverture de tuyère (57), dans la paroi de laquelle sont prévus des trous d'entrée (63).
  8. Pompe à jet selon la revendication 7, caractérisée par le fait que la paroi frontale (55) de l'insert, sur sa face tournée vers la paroi de séparation (7), comporte un épaulement annulaire (53) qui définit un tronçon cylindrique (59) inséré avec jeu dans l'ouverture de siège (49).
  9. Pompe à jet selon la revendication 8, caractérisée par le fait qu'une gorge annualire (61) est prévue dans l'épaulement annulaire (53) pour recevoir un joint torique qui coopère avec le siège (51) pour assurer l'étanchéité.
  10. Pompe à jet selon la revendication 1, caractérisée par le fait que l'insert (45), sur sa face tournée vers l'élément de guidage (39) présente une surface de pression (47) annulaire plane, à laquelle est associée une surface plane (43) prévue sur l'élément de guidage (39).
  11. Pompe à jet selon la revendication 1, caractérisée par le fait que la première ouverture de siège (37) est pourvue d'un filetage intérieur qui peut être amené en prise avec un filetage extérieur prévu sur l'élément de guidage (39).
  12. Pompe à jet selon la revendication 1, caractérisée par le fait qu'un joint torique (47) qui coopère avec l'ouverture de siège (37) est prévu sur l'élément de guidage (39), pour réaliser l'étanchéité entre l'élément de guidage (39) et le corps (3).
  13. Pompe à jet selon la revendication 1, caractérisée par le fait que l'organe de réglage (69) comprend un tige cylindrique (65) qui s'étend à travers l'élément de guidage (39), est guidée coulissante dans la direction longitudinale, avec étanchéité, dans l'élément de guidage (39) et porte un cône de réglage qui coopère avec l'ouverture de soupape (57) conique.
  14. Pompe à jet selon la revendication 1, caractérisée par le fait que l'élément de guidage (39) comporte un moyen élastique qui précontraint l'organe de réglage (69) dans sa position ouverte, c'est-à-dire éloignée de la paroi de séparation (7).
  15. Pompe à jet selon la revendication 1, caractérisée par le fait que la tuyère d'écoulement et le diffuseur sont formés par un tronçon de tube (73) fixé au corps (3) au niveau de la sortie (27), qui s'étend en direction de la paroi de séparation (7) avec sa première extrémité et fait saillie à travers la sortie (27) du corps (3) avec sa seconde extrémité.
  16. Pompe à jet selon la revendication 15, caractérisée par le fait que le tronçon de tube (73) comporte une bride (75) en forme de disque qui est fixée à l'aide d'un écrou à un filetage (31) prévu sur le corps (3) au niveau de la sortie (27).
  17. Pompe à jet selon la revendication 16, caractérisée par le fait que l'écrou (77) tient un tube de liaison (79) entourant le tronçon de tube (73), qui peut être connecté à un tube d'entrée.
  18. Pompe à jet selon la revendication 1, caractérisée par le fait que le corps (3) est un corps à trois voies du commerce.
  19. Pompe à jet selon la revendication 18, caractérisée par le fait que la paroi intermédiaire formant siège de soupape du corps à trois voies, dans laquelle le siège (51) pour l'insert (45) est aménagé après coup, forme la paroi de séparation (7) de la pompe à jet (1).
  20. Utilisation de la pompe à jet (1) selon une des revendications précédentes pour réaliser un système de blocs de montage pour des pompes à jet qui présentent des dimensions extérieures unifiées et peuvent être utilisées dans différentes situations d'utilisation qui, notamment, diffèrent sur le plan de la consommation de chaleur, selon laquelle, pour adapter la pompe à jet (1) à la situation d'utilisation concernée on sélectionne l'insert (45) avec l'ouverture de soupape (57) adaptée parmi un ensemble d'inserts avec des ouvertures de soupape différentes et on le monte dans la pompe à jet (1) qui correspond à un spectre de puissance échelonné.
  21. Utilisation de la pompe à jet (1) selon une des revendications précédentes, pour réaliser un système à blocs de montage pour des pompes à jet qui présentent des dimensions extérieures unifiées et peuvent être utilisées dans différentes situations d'utilisation qui, notamment, diffèrent sur le plan de la consommation de chaleur, selon laquelle, pour adapter la pompe à jet (1) à la situation d'utilisation concernée on sélectionne le diffuseur (73) parmi un ensemble de diffuseurs de différentes dimensions et on le monte dans la pompe à jet (1) qui correspond à un spectre de puissance échelonné.
EP96101626A 1995-02-18 1996-02-06 Mini pompe à jet Expired - Lifetime EP0740081B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19505538 1995-02-18
DE19505538A DE19505538C2 (de) 1995-02-18 1995-02-18 Kleinstrahlpumpe

Publications (2)

Publication Number Publication Date
EP0740081A1 EP0740081A1 (fr) 1996-10-30
EP0740081B1 true EP0740081B1 (fr) 2000-05-17

Family

ID=7754342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96101626A Expired - Lifetime EP0740081B1 (fr) 1995-02-18 1996-02-06 Mini pompe à jet

Country Status (3)

Country Link
EP (1) EP0740081B1 (fr)
AT (1) ATE193099T1 (fr)
DE (2) DE19505538C2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008007298B4 (de) * 2008-02-02 2009-12-31 Helmut Bälz GmbH Strahlpumpe mit Standardfittinggehäuse
DE102022209707A1 (de) * 2022-09-15 2024-03-21 Volkswagen Aktiengesellschaft Düsenanordnung mit integrierter Führung der Düsennadel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7330925U (de) * 1974-10-10 Baelz H Gmbh Regeibare Strahlpumpe, insbesondere für Warmwasserheizungs- oder -bereitungsanlagen
CH135022A (de) * 1928-05-25 1929-08-31 Escher Wyss Maschf Ag Rückschlagventil an Wasserstrahl-Luftpumpen.
DE3341104A1 (de) * 1983-11-12 1985-05-23 Turmag Turbo-Maschinen-AG Nüsse & Gräfer, 4322 Sprockhövel Anordnung zum abfuehren des leckstromes bei hydraulikeinrichtungen
DE3618601A1 (de) * 1986-06-03 1987-12-10 Samson Ag Strahlpumpe
US5167046A (en) * 1990-04-09 1992-12-01 Benson Ronald C Induction vacuum

Also Published As

Publication number Publication date
DE19505538C2 (de) 1997-03-27
DE59605219D1 (de) 2000-06-21
DE19505538A1 (de) 1996-08-22
EP0740081A1 (fr) 1996-10-30
ATE193099T1 (de) 2000-06-15

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