EP0169526B1 - Gasstrahlpumpe - Google Patents

Gasstrahlpumpe Download PDF

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Publication number
EP0169526B1
EP0169526B1 EP85109131A EP85109131A EP0169526B1 EP 0169526 B1 EP0169526 B1 EP 0169526B1 EP 85109131 A EP85109131 A EP 85109131A EP 85109131 A EP85109131 A EP 85109131A EP 0169526 B1 EP0169526 B1 EP 0169526B1
Authority
EP
European Patent Office
Prior art keywords
mixing nozzle
housing
jet pump
gas jet
flange
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
Application number
EP85109131A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0169526A1 (de
Inventor
Udo Dipl.-Ing. Segebrecht
Siegfried Dipl.-Ing. Auschrat
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.)
Sihi GmbH and Co KG
Original Assignee
Sihi GmbH and Co KG
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 Sihi GmbH and Co KG filed Critical Sihi GmbH and Co KG
Publication of EP0169526A1 publication Critical patent/EP0169526A1/de
Application granted granted Critical
Publication of EP0169526B1 publication Critical patent/EP0169526B1/de
Expired 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

Definitions

  • the invention relates to a gas jet pump with a housing, a mixing nozzle holder, a flange connection between the housing and the mixing nozzle holder and a mixing nozzle.
  • the housing is to be understood as the part that includes the propellant nozzle and the channels for supplying the propellant gas and the medium to be compressed.
  • the mixing nozzle must be connected coaxially and tightly to this housing. It is known (US Pat. No. 3,064,878, FIG. 6) to do this by means of a mixing nozzle holder connected to the housing via a flange connection, the housing and the mixing nozzle holder forming a clamping groove in the parting plane of their flanges with which they join Clamp protruding ring projection from the circumference of the mixing nozzle.
  • the disadvantage of this embodiment is that the diameter of the annular projection defines the outer diameter of the starting material for the manufacture of the mixing nozzle, the outer diameter in the entire remaining mixing nozzle area outside the annular projection having to be reduced accordingly by machining. This is expensive.
  • the invention has for its object to provide a less expensive mounting of the mixing nozzle in the housing and the mixing nozzle holder in a gas jet pump of the type mentioned.
  • the solution according to the invention consists in that the holder for the mixing nozzle comprises an annular groove in the circumference of the mixing nozzle and an inserted ring in the annular groove made of elastic material, which is enclosed under tension in the annular space formed by the annular groove and the clamping groove.
  • annular projection can be dispensed with, starting material can be used for the mixing nozzle, the outer diameter of which is only slightly above the finished outer diameter of the mixing nozzle.
  • This design also has the advantage that a single ring made of elastic material causes both the fixation of the mixing nozzle in the axial direction and the sealing of the suction and pressure chamber of the gas jet pump against each other and the inside of the pump to the outside.
  • a particularly useful because particularly simple embodiment of the invention is that the ring made of elastic material is a simple round cord ring (0-ring).
  • a ring-like recess instead of chamfering the inner edges of the flanges of the housing or the mixing nozzle holder, one can arrange a ring-like recess on one of the flanges on the inner edge and clamp the ring in it by the other flange.
  • the observance of tolerances and the measurement of a ring-like recess is often easier than the dimensional and tolerance compliance with bevelling on the housing edges.
  • a shoulder can be arranged in the housing, against which the mixing nozzle abuts when the housing and the mixing nozzle holder are pulled together.
  • the dimensions and the tolerance of the annular groove on the mixing nozzle and the corresponding processing or elaborations of the inner edges of the abutting flanges of the mixing nozzle holder and housing can be coordinated so that a contact of the mixing nozzle on the shoulder in the housing is always guaranteed.
  • the outer diameter of the mixing nozzle part between the annular groove and the end of the mixing nozzle facing the driving nozzle somewhat smaller than in the subsequent part. This facilitates the insertion of elastic rings in the annular groove on the mixing nozzle, especially if this is a less elastic material, such as. B. Teflon.
  • the axial fixation of the mixing nozzle is not adversely affected because the pressure difference between the space behind and the space in front of the mixing nozzle means that the axial thrust acting on the mixing nozzle always points in the direction of the driving nozzle.
  • the housing 1 contains the driving nozzle 2 and the medium channels, namely a channel leading from the flange connection 9 to the driving nozzle surrounding space for the medium to be compressed and a channel leading from the connecting piece 11 to the driving nozzle for the driving medium.
  • the housing has a flange 6 for connecting the mixing nozzle 3 or Mixing nozzle holder 4.
  • the mixing nozzle holder 4 has a flange 7 for connection to the flange 6 of the housing by means of screws 5. It completely surrounds the mixing nozzle, which is not necessary in all cases, but has the advantage that the forces resulting from the fastening and the pressure differences do not result from the mixing nozzle need to be picked up.
  • This design therefore allows the use of all materials suitable for their chemical and physical stress, regardless of their strength, for the mixing nozzle.
  • the mixing nozzle can be made of corrosion-resistant plastic or, with little material, from high-quality material.
  • the mixing nozzle holder on the other hand, can be made of lower-quality material, since it does not come into contact with the pumped or driving medium.
  • a bore 8 is formed within the flanges 6, 7, in which the mixing nozzle 3 with an appropriately tolerated outer surface is inserted, whereby the mixing nozzle is aligned coaxially with the housing 1.
  • the drawing shows the bore 8 both in the housing 1 and in the mixing nozzle holder 4; however, the formation of this hole in the housing 1 may be sufficient.
  • the outer diameter of the mixing nozzle 3 is approximately uniformly cylindrical over its entire length. In the area of the parting plane of the flanges 6, 7, an annular groove 14 is pierced into the peripheral surface of the mixing nozzle, into which an elastic sealing ring 15 is inserted. This protrudes significantly beyond the outer diameter of the mixing nozzle 3.
  • the inner edges 16 and 17 of the flanges 6 and 7 of the housing and the mixing nozzle holder are chamfered to form a clamping groove which is triangular in cross section.
  • the cross section of the annular space, which is enclosed by the annular groove 14 and the inclined surfaces 16, 17 when the flanges 6, 7 are in direct contact with one another, is dimensioned such that it is expediently somewhat larger than the cross section of the 0-ring 15 inserted therein this is deformed so that the required sealing pressure is guaranteed.
  • the position of the 0-ring fixes the axial position of the mixing nozzle with respect to the housing and seals the inside of the pump and the pump suction side from the pump pressure side, both in the annular groove 14 on the mixing nozzle side and in the clamping groove on the housing side, which is formed by the inclined surfaces 16, 17 .
  • Fig. 1 indicates different design options on the right and left.
  • an additional ring flange 12 is arranged on the pressure flange of the mixing nozzle holder, which holds an elastic sealing ring 13 for sealing the pressure-side end of the mixing nozzle 3, while in the construction shown on the left in the drawing, such a seal is dispensed with.
  • the medium to be pumped flows into the pump through the nozzle 9, while the propellant gas enters through the bore 11. Both of them leave the pump through the pressure port 10 after the pumping action has been brought about in a known manner.
  • FIG. 2 shows an alternative embodiment of the area marked with a dash-dotted circle in FIG. 1.
  • the clamping groove is formed by a bevel 17 provided on one side on the flange 6 of the housing and the end face of the flange 7 of the mixing nozzle holder which has just been executed.
  • a shoulder 18 is provided in the bore 8 of the housing flange 6, through which the mixing nozzle 3 is axially fixed.
  • the arrangement of the annular groove 14 and the bevel 17 is chosen so that the mixing nozzle 3 rests on the shoulder 18 after assembly.
  • the shoulder 18 supports the mixing nozzle against the forces which result from the pressure difference between the suction and pressure sides.
  • FIG. 3 Another variant is shown in FIG. 3. While the annular groove 14 in the outer surface of the mixing nozzle is rectangularly limited as in the other examples, the clamping groove is formed by a rectangularly limited recess 19 of the flange 7 of the mixing nozzle holder 4 on the one hand and the end face of the flange 6 of the housing which has just been executed on the other.
  • a profile ring 20 is used as an elastic sealing ring.
  • a housing shoulder 18 is provided for axially fixing the mixing nozzle.
  • the bores of the housing flange and the correspondingly interacting peripheral surface of the mixing nozzle are made with a slightly smaller diameter than in area 22 of the bore formed in flange 7 and the associated peripheral part of the mixing nozzle. Thanks to the smaller diameter in the region 21, the sealing ring 19 can be introduced more easily into the annular groove 14.

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)
  • Nozzles (AREA)
  • Fuel-Injection Apparatus (AREA)
EP85109131A 1984-07-26 1985-07-22 Gasstrahlpumpe Expired EP0169526B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843427645 DE3427645A1 (de) 1984-07-26 1984-07-26 Gasstrahlpumpe
DE3427645 1984-07-26

Publications (2)

Publication Number Publication Date
EP0169526A1 EP0169526A1 (de) 1986-01-29
EP0169526B1 true EP0169526B1 (de) 1988-06-08

Family

ID=6241681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85109131A Expired EP0169526B1 (de) 1984-07-26 1985-07-22 Gasstrahlpumpe

Country Status (4)

Country Link
US (1) US4632649A (enrdf_load_stackoverflow)
EP (1) EP0169526B1 (enrdf_load_stackoverflow)
JP (1) JPS6146500A (enrdf_load_stackoverflow)
DE (2) DE3427645A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512700A1 (de) * 1995-04-07 1996-10-10 Teves Gmbh Alfred Strahlpumpe

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD294265S (en) 1985-06-24 1988-02-16 Corken International Corporation Fluid ejector pump
US4931225A (en) * 1987-12-30 1990-06-05 Union Carbide Industrial Gases Technology Corporation Method and apparatus for dispersing a gas into a liquid
US4880357A (en) * 1988-06-27 1989-11-14 Mathers Terrence L Method and apparatus for producing high vacuum
US4963073A (en) * 1988-11-25 1990-10-16 George Tash Water pressure operated water pump
GB2227285B (en) * 1988-12-01 1992-11-25 Wardtec Ltd Accelerator device in a central heating system.
US5167046A (en) * 1990-04-09 1992-12-01 Benson Ronald C Induction vacuum
US5954481A (en) * 1996-03-14 1999-09-21 Itt Manufacturing Enterprises Inc. Jet pump
DE29719975U1 (de) 1997-11-11 1998-01-08 Richter, Siegfried, Dipl.-Ing. (FH), 88605 Sauldorf Mit Druckluft betriebene Saugdüse
RU2143596C1 (ru) * 1998-09-08 1999-12-27 Попов Сергей Анатольевич Жидкостно-газовый эжектор
AU762601B2 (en) * 1999-09-14 2003-06-26 Zoltans Pool Products Pty Ltd Fluid flow pump
AU714337B3 (en) * 1999-09-14 1999-12-23 Zoltans Pool Products Pty Ltd Fluid flow pump
KR200201414Y1 (ko) * 2000-04-17 2000-11-01 주식회사태백종합환경기술단 액체를 원동체로 하는 조립식 인젝터
RU2228463C2 (ru) * 2001-03-27 2004-05-10 Владимир Николаевич Рыжков Струйный аппарат
DE10149779A1 (de) * 2001-10-09 2003-04-10 Bayer Ag Verfahren zur Rückführung von Prozessgas in elektrochemischen Prozessen
RU2232304C2 (ru) * 2002-02-06 2004-07-10 Козлов Михаил Тимофеевич Струйная насосная установка
US20130000348A1 (en) * 2010-03-31 2013-01-03 Mitsubishi Electric Corporation Ejector, motive fluid foaming method, and refrigeration cycle apparatus
US9039385B2 (en) 2011-11-28 2015-05-26 Ford Global Technologies, Llc Jet pump assembly
JP6883339B2 (ja) * 2018-09-10 2021-06-09 国立研究開発法人宇宙航空研究開発機構 エジェクタ
DE102019202540A1 (de) * 2019-02-25 2020-08-27 Deutsches Institut Für Lebensmitteltechnik E.V. Vorrichtung zur Erzeugung von Unterdruck

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2183623A (en) * 1939-12-19 Steam ejector
FR511051A (fr) * 1920-03-03 1920-12-16 Delas Condenseurs Perfectionnements aux éjecteurs à vapeur à diffuseur refroidi
GB300811A (en) * 1927-12-15 1928-11-22 Hilton St John Smith An improved hydraulic injector device
US2085361A (en) * 1935-10-05 1937-06-29 Schutte & Koerting Company Steam jet exhauster
US2146100A (en) * 1938-04-25 1939-02-07 Manning Maxwell & Moore Inc Jet pump
US2178898A (en) * 1938-07-01 1939-11-07 Akron Brass Mfg Company Inc Siphon pump construction
US2231090A (en) * 1939-04-14 1941-02-11 Worthington Pump & Mach Corp Ejector
US3064878A (en) * 1958-01-03 1962-11-20 Nash Engineering Co Method and apparatus for high performance evacuation system
DE1503706C3 (de) * 1965-06-19 1971-09-02 Siemens Ag Einer vakuumpumpe vorschaltbare strahlsaugeraggregate
JPS5369908A (en) * 1976-12-02 1978-06-21 Takuo Mochizuki High pressure spraying body
US4183722A (en) * 1977-06-06 1980-01-15 Roeder George K Downhole jet pumps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512700A1 (de) * 1995-04-07 1996-10-10 Teves Gmbh Alfred Strahlpumpe

Also Published As

Publication number Publication date
DE3427645A1 (de) 1986-01-30
EP0169526A1 (de) 1986-01-29
JPH0553960B2 (enrdf_load_stackoverflow) 1993-08-11
JPS6146500A (ja) 1986-03-06
US4632649A (en) 1986-12-30
DE3563243D1 (en) 1988-07-14

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