US3720482A - Device for generating an air system by means of an ejector - Google Patents

Device for generating an air system by means of an ejector Download PDF

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Publication number
US3720482A
US3720482A US00133583A US3720482DA US3720482A US 3720482 A US3720482 A US 3720482A US 00133583 A US00133583 A US 00133583A US 3720482D A US3720482D A US 3720482DA US 3720482 A US3720482 A US 3720482A
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US
United States
Prior art keywords
tube
venturi tube
channels
sleeve
extra
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
US00133583A
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English (en)
Inventor
P Tell
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Piab AB
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Piab AB
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Publication date
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Publication of US3720482A publication Critical patent/US3720482A/en
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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
    • F04F5/466—Arrangements of nozzles with a plurality of nozzles arranged in parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31241—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the circumferential area of the venturi, creating an aspiration in the central part of the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit

Definitions

  • ABSTRACT Foreign Application Priority Data A device for generating an air stream through the ven- May 14, 1970 Sweden ..66l5/7O turi tube of an j in which there are a number of 52 us. (:1.
  • the ejector nozzle is an annular air gap between a conical inner wall part of said venturi tube and one end of an inner tube which is displaceable inside the venturi tube and which can be brought nearer to or farther from said conical wall part.
  • the object of the present invention is to eliminate said drawback.
  • the invention relates to a device for generating an air stream through a venturi tube by means of an ejector which is formed by a number of channels for air under pressure, the orifices of said channels being distributed along a circular line around the inner circumference of said venturi tube, in which the cross section areas of said channels can be varied by means of displacing an inner tube belonging to said venturi tube and which is concentric with the venturi tube and slidably fitted in the latter, wherein the inner wall surface of said venturi tube has a cylindrical part where said circular line is located and the end portion of said inner tube being tightly slidable on the inner wall surface of said cylindrical part and to be displaceable from a position, where the orifices of the channels are substantially open to a position where said orifices are substantially closed.
  • FIG. 1 is an axial section through the device constructed according to the invention.
  • FIG. 2 is a similar axial section of the device constructed according to a more complete embodiment.
  • FIG. 3 is an axial section on a greater scale through the insertable sleeve of the invention.
  • the device according to the invention comprises three main parts viz. a venturi tube 1, an outer sleeve 2 and a displaceable, inner tube 3.
  • the channel through the venturi tube 1 comprises a nozzle part 4 which is conical and the cross sectional area of which increases outwards.
  • This nozzle part is a so called lava] nozzle.
  • Said channel further comprises a cylindrical part 5, a
  • the outer sleeve 2 is mounted on the venturi tube so as to be rotatable but not axially displaceable, 1 and to that effect two screws 10 reach with their ends into an annular groove 1 l on the outer side of the venturi tube.
  • the adjustable, inner tube 3 has a portion 15 which is threaded into the portion 8 on the venturi tube 1.
  • the end portion 16 of said adjustable tube 3 extends into the cylindrical part 7 of the venturi tube.
  • An annular packing 17 is provided between the inner tube 3 and the inner wall of the venturitube.
  • the inner wall of the end portion 16 is conical as shown, and because the inner tube is displaceable, said wall portion can be brought to cover and close the openings of the channels 9.
  • a screw 18 inserted in a wall portion of the venturi tube 1 limits the movement of the adjustable, inner tube 3, so that it cannot be moved out from the venturi tube 1.
  • a flexible tube or the like is connectable. Such a tube can also be connected to the outer (right hand) end of the venturi tube 1.
  • the venturi tube 1 should preferably be rotatable for achieving the axial displacement of the inner tube relative to the venturi tube. The rotation of the venturi tube is not prevented by the outer sleeve 2.
  • the powerful air stream which is obtained is capable of suctioning and transporting stuffs of different kinds or can be used for control of different processes.
  • the device according to the invention has especially that advantage that it is-composed of simple parts which are easy to manufacture. Further, the control of the air stream through the channel of the venturi tube takes place directly at the openings of the channels 9 by changing the areas of said openings, so that a change of said areas brings about a corresponding change of the action of the air under pressure and a corresponding change of the air stream through the device.
  • the device shown in FIG. 2 is essentially like the device shown in FIG. 1 and corresponding parts have corresponding reference numerals.
  • the wall surface of the channel 23 through the extra sleeve 21 is shaped to form a streamlined transition zone between the sleeve and the rounded portion 6 of the venturi tube and also between the sleeve and the outlet part 4 of the venturi tube.
  • an extra tube 24 with an annular packing 25 and a channel 26 there is inserted an extra tube 24 with an annular packing 25 and a channel 26.
  • Said channel 26 has the same inner diameter as the minimum inner diameter of the extra sleeve 21.
  • the extra tube 24 and the extra sleeve 21 provide thus a reduction of the opening in the inner tube 24 and the venturi tube 1 without decreasing the outstreaming of air from the channels 9. Therefore, by means of said extra sleeve and said extra tube, a still more powerful airstream will be obtained through the device.
  • the outstreaming of air under pressure through the openings of the channels 9 is still controllable by axial displacement of the inner tube in the venturi tube as described in connection with FIG. 1.
  • the extra sleeve 21 and the extra tube 24 are easily exchangeable for other such extra devices with smaller diameter or bigger diameter.
  • FIG. 3 there is illustrated an extra sleeve 21 the minimum inner diameter of which has the greatest possible value with respect to the outer diameter of the sleeve.
  • the invention is not limited to the embodiments illustrated in the drawing because the invention may be modified in several ways within the scope of the appended claims.
  • the number of the channels 9 and their inclination in the venturi tube may be varied.
  • different means for the mutual displacement of the inner tube and the venturi tube may be provided.
  • the annular groove forming the annular channel 13 may be provided in the outer wall of the venturi tube instead of the inner wall of the outer sleeve 2.
  • a device for generating an air stream comprising, a venturi tube with an ejector formed therein, the ejector including a plurality of channels adapted to receive a pressurized air stream, each of said channels being inclined relative to the longitudinal direction of the venturi tube and having a respective orifice opening positioned along a circular line around the inner circumference of the venturi tube upon a cylindrical part thereof, an inner tube having an end portion engaged within the cylindrical part, the inner tube being displaceable from a position in the cylindrical part where the orifices are substantially open to a position where the orifices are substantially closed such that the exit cross sectional areas of the channels may be varied according to displacement of the inner tube.
  • a device as claimed in claim 1 in which said inner tube is threadedly engaged within the venturi tube upstream of said cylindrical part, and the axial displacement of the inner tube in the venturi tube is limited by a StOg) screw threadedjn the wall of said ven turi tube.
  • a device as claimed in claim 1 in which an outer sleeve is tightly mounted outside said venturi tube and an annular groove is formed between the outer sleeve and the outer wall surface of said venturi tube, the orifice openings of said channels being located in said annular groove.
  • a device as claimed in claim 4 in which said outer sleeve is rotatably mounted on said venturi tube but prevented from being axially displaced by means of one or more pins or screws in one of said tube or sleeve which cooperate with one or more annular grooves in the other of said tube or sleeve.
  • venturi tube includes a cylindrical inner part and an extra exchangeable sleeve is provided for insertion therein, an extra exchangeable tube being provided for insertion in said inner tube, the smallest inner diameters of said extra sleeve and said extra tube being substantially the same, whereby positioning of said extra sleeve and extra tube will reduce the inner area of said venturi tube and said inner tube.
  • a device as claimed in claim 6 in which there is a streamlined transition zone between said extra sleeve and the adjacent inner wall surfaces of said venturi tube at each side of said extra sleeve.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
US00133583A 1970-05-14 1971-04-13 Device for generating an air system by means of an ejector Expired - Lifetime US3720482A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE06615/70A SE339626B (enrdf_load_stackoverflow) 1970-05-14 1970-05-14

Publications (1)

Publication Number Publication Date
US3720482A true US3720482A (en) 1973-03-13

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ID=20269163

Family Applications (1)

Application Number Title Priority Date Filing Date
US00133583A Expired - Lifetime US3720482A (en) 1970-05-14 1971-04-13 Device for generating an air system by means of an ejector

Country Status (6)

Country Link
US (1) US3720482A (enrdf_load_stackoverflow)
CH (1) CH524770A (enrdf_load_stackoverflow)
DE (1) DE2123254A1 (enrdf_load_stackoverflow)
FR (1) FR2091407A5 (enrdf_load_stackoverflow)
GB (1) GB1303572A (enrdf_load_stackoverflow)
SE (1) SE339626B (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4186772A (en) * 1977-05-31 1980-02-05 Handleman Avrom Ringle Eductor-mixer system
US4765373A (en) * 1987-07-07 1988-08-23 Coppus Engineering Corporation Gas flow amplifier
US5117531A (en) * 1989-05-08 1992-06-02 Electrostar Schottle Gmbh & Co. Suction or blowing apparatus
US5137439A (en) * 1989-02-17 1992-08-11 Svenska Rotor Maskiner Ab Screw rotor machine with de laval nozzle for noise reduction
US5341991A (en) * 1987-09-07 1994-08-30 Mitab Montage & Industriteknik Ab Method and apparatus for atomizing liquids
EP0961022A3 (en) * 1998-05-23 2000-11-22 Lucas Industries Limited Venturi pump
US6402068B1 (en) 1998-08-06 2002-06-11 Avrom R. Handleman Eductor mixer system
US20110064509A1 (en) * 2009-09-17 2011-03-17 Goss International Americas, Inc. Air delivery apparatus for delivering air to a moving substrate in a printing press
CN109404350A (zh) * 2018-10-31 2019-03-01 招商局重工（江苏）有限公司 一种用于排出船体分段内积水的真空抽水泵
US11209024B2 (en) 2015-06-24 2021-12-28 Itt Manufacturing Enterprises Llc Discharge casing insert for pump performance characteristics control

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2208715C1 (ru) * 2001-11-05 2003-07-20 Открытое акционерное общество "Татнефть" им. В.Д. Шашина Устройство для установки диафрагм и струйного насоса
GB2569122A (en) * 2017-12-05 2019-06-12 Atlas Copco Ias Uk Ltd Fastener handling devices for fastener setting machines, and related methods
GB2569127A (en) 2017-12-05 2019-06-12 Atlas Copco Ias Uk Ltd Nose arrangements for fastener setting machines, and related methods
GB2569126A (en) 2017-12-05 2019-06-12 Atlas Copco Ias Uk Ltd Fastener magazines, and related supply systems and methods

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2399249A (en) * 1944-10-24 1946-04-30 Gen Tank Service Inc Apparatus for the movement of viscous materials
US3175515A (en) * 1963-03-22 1965-03-30 Burl L Cheely Jet suction device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2399249A (en) * 1944-10-24 1946-04-30 Gen Tank Service Inc Apparatus for the movement of viscous materials
US3175515A (en) * 1963-03-22 1965-03-30 Burl L Cheely Jet suction device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4186772A (en) * 1977-05-31 1980-02-05 Handleman Avrom Ringle Eductor-mixer system
US4765373A (en) * 1987-07-07 1988-08-23 Coppus Engineering Corporation Gas flow amplifier
US5341991A (en) * 1987-09-07 1994-08-30 Mitab Montage & Industriteknik Ab Method and apparatus for atomizing liquids
US5137439A (en) * 1989-02-17 1992-08-11 Svenska Rotor Maskiner Ab Screw rotor machine with de laval nozzle for noise reduction
US5117531A (en) * 1989-05-08 1992-06-02 Electrostar Schottle Gmbh & Co. Suction or blowing apparatus
EP0961022A3 (en) * 1998-05-23 2000-11-22 Lucas Industries Limited Venturi pump
US6402068B1 (en) 1998-08-06 2002-06-11 Avrom R. Handleman Eductor mixer system
US20110064509A1 (en) * 2009-09-17 2011-03-17 Goss International Americas, Inc. Air delivery apparatus for delivering air to a moving substrate in a printing press
US11209024B2 (en) 2015-06-24 2021-12-28 Itt Manufacturing Enterprises Llc Discharge casing insert for pump performance characteristics control
CN109404350A (zh) * 2018-10-31 2019-03-01 招商局重工（江苏）有限公司 一种用于排出船体分段内积水的真空抽水泵

Also Published As

Publication number Publication date
FR2091407A5 (enrdf_load_stackoverflow) 1972-01-14
SE339626B (enrdf_load_stackoverflow) 1971-10-11
GB1303572A (enrdf_load_stackoverflow) 1973-01-17
CH524770A (de) 1972-06-30
DE2123254A1 (de) 1971-11-25

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