EP0889244A2 - Saugstrahlpumpe - Google Patents

Saugstrahlpumpe Download PDF

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Publication number
EP0889244A2
EP0889244A2 EP98305146A EP98305146A EP0889244A2 EP 0889244 A2 EP0889244 A2 EP 0889244A2 EP 98305146 A EP98305146 A EP 98305146A EP 98305146 A EP98305146 A EP 98305146A EP 0889244 A2 EP0889244 A2 EP 0889244A2
Authority
EP
European Patent Office
Prior art keywords
nozzle
ejector
fluid
throat
inlet
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.)
Withdrawn
Application number
EP98305146A
Other languages
English (en)
French (fr)
Other versions
EP0889244A3 (de
Inventor
Errol Michael Stolberg
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.)
USF Ltd
Original Assignee
USF Ltd
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 USF Ltd filed Critical USF Ltd
Publication of EP0889244A2 publication Critical patent/EP0889244A2/de
Publication of EP0889244A3 publication Critical patent/EP0889244A3/de
Withdrawn legal-status Critical Current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
    • F04F5/02—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
    • F04F5/44—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 present invention relates to an ejector for mixing and ejecting two or more fluids. In many circumstances, it is desired to mix and eject fluids against a back pressure.
  • One example of a system in which such an ejector is required is for the supply of regenerant chemicals for the regeneration of ion exchange resins in an ion exchange column.
  • the ejector disclosed in this application includes an ejector nozzle having a generally conical outer surface which is coaxially arranged with respect to an inlet to an ejector throat, the inlet having a generally conical inner surface which surrounds the nozzle.
  • One of the fluids to be mixed is supplied, under pressure, to the nozzle.
  • the fluid is jetted into the ejector throat at a high velocity.
  • the other fluid is supplied to a chamber in communication with the ejector throat.
  • the high velocity, jet of fluid through the nozzle causes a reduced pressure around the outside of the ejector throat which draws the other fluid into the throat.
  • the fluids flow through the ejector throat, and enter a diffusion portion where the fluids are mixed and from which they are ejected.
  • the relative position of the nozzle and the inlet to the ejector throat are adjustable. By adjusting the spacing between the nozzle and the inlet, the quantity of the other fluid drawn into the throat by the jetted fluid is controllable.
  • an ejector comprises:
  • the flow rate of the jetted fluid through the nozzle can be controlled by varying the cross-sectional area of the opening of the nozzle using the throttle without reducing the velocity of the jet of the first fluid. Accordingly, the volume of the jetted fluid which is mixed and ejected with the second fluid is controllable, without reducing the velocity of the first fluid. By maintaining the high velocity jet, enough suction is generated so that the second fluid is drawn into the ejector throat.
  • the position of the nozzle relative to the ejector throat is controllable.
  • This allows control of the flow rate of the second fluid which may depend on the spacing between the outer surface of the nozzle and the inner surface of the ejector throat.
  • the outer surface of the nozzle may form a seal with the second fluid inlet so that as the nozzle is moved it opens and closes the inlet.
  • the inlet is preferably shaped as a slot or as a triangular aperture to achieve the correct proportioning between the movement of the nozzle and the flow rate of the second fluid through the inlet. This give control of the volumes of both the first and second fluids.
  • the nozzle may be provided on a hollow nozzle body.
  • the nozzle body may include apertures in its side wall through which fluid from the first fluid inlet is supplied to the nozzle.
  • the nozzle body is preferably provided in a generally cylindrical ejector housing.
  • the position of the outer surface of the nozzle may be controlled by use of an externally threaded portion on the nozzle body and a corresponding internally threaded portion on the ejector housing so that relative rotational movement of the nozzle body with respect to the ejector housing moves the nozzle.
  • Either the outer surface of the nozzle or the interior surface of the ejector throat is preferably convexly curved. This gives an accurate and sharp line of contact between the nozzle and the ejector throat which allows for the complete shut-off of the second fluid.
  • the interior surface of the nozzle body preferably tapers towards the nozzle, thereby reducing the cross-sectional area of the nozzle body towards the nozzle. This increases the velocity of the fluid as it passes towards the nozzle.
  • the first fluid inlet is provided generally perpendicular to the axial direction of the nozzle body as the increase in velocity ensures a substantially smooth flow of the fluid through the nozzle despite the flow not being initially coaxial to the nozzle.
  • the throttle can be axially provided in the body.
  • the throttle is a needle having a generally conical outer surface which is relatively movable in an axial direction with respect to the nozzle.
  • the needle may include an externally threaded shank which corresponds to an internally threaded portion provided on the nozzle body, so that relative rotational movement of the needle with respect to the nozzle body causes relative axial movement between the nozzle and needle.
  • annular plug may be provided which fits in the opening of the nozzle to reduce the diameter of the opening.
  • O-rings are provided between the nozzle body and the ejector body to give a sliding seal between the nozzle body and the ejector body.
  • the ejector comprises a generally cylindrical ejector housing 1 that includes a nozzle body 2 and an ejector outlet 3.
  • the nozzle body 2 is a hollow body having a generally cylindrical outer surface, and a nozzle 4 at one end.
  • the nozzle 4 has a frusto-conical outer nozzle surface.
  • the interior surface of the nozzle body 2 tapers towards the nozzle end of the body.
  • the nozzle body 2 includes an externally threaded portion (not shown), and the ejector housing 1 includes a corresponding internally threaded portion (not shown).
  • the ejector body 1 includes a first fluid inlet 5.
  • the side walls of the nozzle body 2 include holes 6 through which fluid entering into the ejector housing 1 through the first fluid inlet 5 enters the interior of the nozzle body 2.
  • O-ring seals 7 are provided on the outer surface of the nozzle body 2 on either side of the holes 6 to provide a fluid tight sliding seal between the ejector housing 1 and the nozzle body 2.
  • a generally conical needle 8 is provided within the nozzle body 2, the tip of the needle 8 extending towards the nozzle 4.
  • the needle 8 includes a generally cylindrical shank with an externally threaded portion (not shown) which corresponds to an internally threaded portion (not shown) on the interior surface of the nozzle body 2. Relative rotation of the needle 8 with respect to the nozzle body 2 causes relative axial movement of the needle 8 with respect to the nozzle 2, allowing the needle 8 to extend through and beyond the nozzle 2.
  • the nozzle 2 opens into an inlet 9 to an ejector throat in the ejector housing 1.
  • the ejector housing 1 includes a second fluid inlet 10 which opens into the inlet 9 to the ejector throat.
  • the ejector outlet 3 is provided downstream of the ejector throat.
  • the inlet 9 has a generally conical interior surface. The inlet 9 leads into the ejector throat, which itself leads into the coaxial diffuser portion of the outlet 3.
  • the diameter of the ejector throat is slightly greater than the diameter of the opening of the nozzle 4.
  • a first fluid enters the first inlet 5 in the ejector housing 1 under pressure, and passes into the interior of the nozzle body through the holes 6 in the side wall.
  • the fluid passes through the nozzle body 2, and is jetted through the nozzle 4 into the inlet 9 to the ejector throat.
  • the second fluid inlet 10 is connected to a source of a second fluid.
  • the jet of fluid from the nozzle 4 into the ejector throat causes a partial vacuum around the edge of the ejector throat. This partial vacuum draws the second fluid from the source and into the ejector throat.
  • the jet of the first fluid together with the second fluid drawn into the ejector throat passes through the coaxial diffuser portion of the outlet 3 where the two fluids are mixed, and are ejected from the ejector.
  • the amount of the second fluid which is drawn into the ejector throat is determined by the gap between the interior surface of the inlet 9 to the ejector throat, and the outer surface of the nozzle 4.
  • the nozzle 4 is moved relative to the ejector throat, thereby adjusting the spacing between the interior surface of the inlet 9 and the exterior surface of the nozzle 4.
  • a stepwise adjustment may alternatively or additionally be provided. Such a stepwise adjustment may be provided by a releasable clamp or a ratchet mechanism.
  • stepwise adjustment it is advantageous to use the stepwise adjustment for course positioning of the nozzle with respect to the ejector throat, and fine adjustment by use of the screw thread.
  • the supply of the second fluid can be substantially stopped.
  • either the outer frusto-conical surface of the nozzle 4 or the interior conical surface of the inlet 9 are convexly curved to give an accurate line contact between the surfaces.
  • the cross-sectional area of the opening of the nozzle 4 is adjustable.
  • the cross-sectional area of the nozzle 4 is reduced, the flow rate of the first fluid through the nozzle 4 is reduced, but the velocity of the jet of the first fluid through the nozzle 4 remains constant. Accordingly, the vacuum generated around the outer periphery of the ejector throat remains substantially constant, and continues to draw the second fluid into the ejector outlet. Accordingly, adjustment of the relative position of the needle 8 and the nozzle 4 varies the volume of the first fluid jetting into the ejector outlet, but does not effect the amount of the second fluid drawn into the ejector outlet.
  • the ejector allows complete control of the quantities of the first and second fluid ejected from the ejector.
  • the second example is generally similar to the first except for the formation of the second fluid inlet 10a and how it co-operates with the outer surface of nozzle 2.
  • the outside of the nozzle 2 contacts the inner wall of the ejector housing 1 and so forms an effective seal with the inlet 10a when the nozzle is in its forwards position, to the left as shown in Figures 1 and 2.
  • the inlet 10a preferably has the form of a slot, as shown in Figure 3 or a triangular form as shown in Figure 4. More than one second fluid may be introduced if more than one inlet 10a is provided and these may be proportioned inter se by proportioning the areas of their inlets 10a.
  • An ejector according to the present invention has been produced having a 5cm water inlet supplied at a pressure of 525 kPa.
  • the maximum nozzle opening is 3.14 cm 2 and adjustment of the needle was made to give a flow rate of between 9.30m 3 /hour and 30.90m 3 /hour. Throughout this range, and with a back pressure of 170 kPa, the vacuum produced by the jet was able to draw in a second fluid at a rate of around 10m 3 /hour.

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)
EP98305146A 1997-06-30 1998-06-29 Saugstrahlpumpe Withdrawn EP0889244A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9713822 1997-06-30
GBGB9713822.6A GB9713822D0 (en) 1997-06-30 1997-06-30 Ejector

Publications (2)

Publication Number Publication Date
EP0889244A2 true EP0889244A2 (de) 1999-01-07
EP0889244A3 EP0889244A3 (de) 1999-08-25

Family

ID=10815169

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98305146A Withdrawn EP0889244A3 (de) 1997-06-30 1998-06-29 Saugstrahlpumpe

Country Status (2)

Country Link
EP (1) EP0889244A3 (de)
GB (1) GB9713822D0 (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7111975B2 (en) * 2002-10-11 2006-09-26 Pursuit Dynamics Plc Apparatus and methods for moving a working fluid by contact with a transport fluid
US7334427B2 (en) 2003-03-05 2008-02-26 Nippon Soken, Inc. Ejector with tapered nozzle and tapered needle
US7416326B2 (en) * 2002-05-10 2008-08-26 Family-Life Co., Ltd. Apparatus for producing sterilized water
US20100020631A1 (en) * 2008-07-25 2010-01-28 Erich William Gansmuller Apparatus and method for mixing by producing shear and/or cavitation, and components for apparatus
EP1998053A3 (de) * 2007-05-31 2012-03-21 Valeo Klimasysteme GmbH Ejektorpumpe
US8193395B2 (en) 2007-05-02 2012-06-05 Pursuit Dynamics Plc Biomass treatment process and system
US8419378B2 (en) 2004-07-29 2013-04-16 Pursuit Dynamics Plc Jet pump
WO2013185164A1 (en) * 2012-06-12 2013-12-19 Endless Solar Corporation Ltd An ejector
US8789769B2 (en) 2006-09-15 2014-07-29 Tyco Fire & Security Gmbh Mist generating apparatus and method
WO2014173075A1 (zh) * 2013-04-27 2014-10-30 广州海鸥卫浴用品股份有限公司 可调射流淋浴设备
US9004375B2 (en) 2004-02-26 2015-04-14 Tyco Fire & Security Gmbh Method and apparatus for generating a mist
US9010663B2 (en) 2004-02-26 2015-04-21 Tyco Fire & Security Gmbh Method and apparatus for generating a mist
CN105855084A (zh) * 2016-05-16 2016-08-17 浙江大学 可调式喷射器
NL2019951B1 (en) * 2017-11-21 2019-05-27 Bort De Graaf Koel En Klimaattechniek B V Adjustable mixing chamber diameter for ejector
WO2019103608A1 (en) * 2017-11-21 2019-05-31 Bort De Graaf Koel - En Klimaattechniek B.V. Ejector
US10507480B2 (en) 2004-02-26 2019-12-17 Tyco Fire Products Lp Method and apparatus for generating a mist
US10704813B2 (en) 2014-01-30 2020-07-07 Carrier Corporation Ejectors and methods of manufacture

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE51229C (de) * R. G. BROOKE in Crumpsal], Manchester, Lancaster, England Stellvorrichtung für Dampfdüsen bei Injektoren
DE465952C (de) * 1925-03-01 1928-09-28 Johann Stumpf Dr Ing Injektor
EP0541925A2 (de) * 1991-09-13 1993-05-19 Kabushiki Kaisha Toshiba Dampfinjektor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE51229C (de) * R. G. BROOKE in Crumpsal], Manchester, Lancaster, England Stellvorrichtung für Dampfdüsen bei Injektoren
DE465952C (de) * 1925-03-01 1928-09-28 Johann Stumpf Dr Ing Injektor
EP0541925A2 (de) * 1991-09-13 1993-05-19 Kabushiki Kaisha Toshiba Dampfinjektor

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7416326B2 (en) * 2002-05-10 2008-08-26 Family-Life Co., Ltd. Apparatus for producing sterilized water
US7111975B2 (en) * 2002-10-11 2006-09-26 Pursuit Dynamics Plc Apparatus and methods for moving a working fluid by contact with a transport fluid
US7334427B2 (en) 2003-03-05 2008-02-26 Nippon Soken, Inc. Ejector with tapered nozzle and tapered needle
US10507480B2 (en) 2004-02-26 2019-12-17 Tyco Fire Products Lp Method and apparatus for generating a mist
US9010663B2 (en) 2004-02-26 2015-04-21 Tyco Fire & Security Gmbh Method and apparatus for generating a mist
US9004375B2 (en) 2004-02-26 2015-04-14 Tyco Fire & Security Gmbh Method and apparatus for generating a mist
US9239063B2 (en) 2004-07-29 2016-01-19 Pursuit Marine Drive Limited Jet pump
US8419378B2 (en) 2004-07-29 2013-04-16 Pursuit Dynamics Plc Jet pump
US8789769B2 (en) 2006-09-15 2014-07-29 Tyco Fire & Security Gmbh Mist generating apparatus and method
US9931648B2 (en) 2006-09-15 2018-04-03 Tyco Fire & Security Gmbh Mist generating apparatus and method
US8193395B2 (en) 2007-05-02 2012-06-05 Pursuit Dynamics Plc Biomass treatment process and system
US8513004B2 (en) 2007-05-02 2013-08-20 Pursuit Dynamics Plc Biomass treatment process
EP1998053A3 (de) * 2007-05-31 2012-03-21 Valeo Klimasysteme GmbH Ejektorpumpe
US20130010569A1 (en) * 2008-07-25 2013-01-10 Erich William Gansmuller Apparatus and Method for Mixing by Producing Shear and/or Cavitation and Components for Apparatus
US8322910B2 (en) * 2008-07-25 2012-12-04 The Procter & Gamble Company Apparatus and method for mixing by producing shear and/or cavitation, and components for apparatus
US20100020631A1 (en) * 2008-07-25 2010-01-28 Erich William Gansmuller Apparatus and method for mixing by producing shear and/or cavitation, and components for apparatus
WO2013185164A1 (en) * 2012-06-12 2013-12-19 Endless Solar Corporation Ltd An ejector
WO2014173075A1 (zh) * 2013-04-27 2014-10-30 广州海鸥卫浴用品股份有限公司 可调射流淋浴设备
US10704813B2 (en) 2014-01-30 2020-07-07 Carrier Corporation Ejectors and methods of manufacture
CN105855084A (zh) * 2016-05-16 2016-08-17 浙江大学 可调式喷射器
CN105855084B (zh) * 2016-05-16 2018-05-15 浙江大学 可调式喷射器
NL2019951B1 (en) * 2017-11-21 2019-05-27 Bort De Graaf Koel En Klimaattechniek B V Adjustable mixing chamber diameter for ejector
WO2019103608A1 (en) * 2017-11-21 2019-05-31 Bort De Graaf Koel - En Klimaattechniek B.V. Ejector

Also Published As

Publication number Publication date
EP0889244A3 (de) 1999-08-25
GB9713822D0 (en) 1997-09-03

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