US3568700A - Fluid amplifier - Google Patents

Fluid amplifier Download PDF

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Publication number
US3568700A
US3568700A US781891A US3568700DA US3568700A US 3568700 A US3568700 A US 3568700A US 781891 A US781891 A US 781891A US 3568700D A US3568700D A US 3568700DA US 3568700 A US3568700 A US 3568700A
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United States
Prior art keywords
jet
cavity
amplifier
fluid
recirculation
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Expired - Lifetime
Application number
US781891A
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English (en)
Inventor
Henk A M Verhelst
Cornelis J Van Gorp
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
    • F15C1/00—Circuit elements having no moving parts
    • F15C1/18—Turbulence devices, i.e. devices in which a controlling stream will cause a laminar flow to become turbulent ; Diffusion amplifiers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
    • Y10T137/2229—Device including passages having V over T configuration
    • Y10T137/2234—And feedback passage[s] or path[s]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
    • Y10T137/2229—Device including passages having V over T configuration
    • Y10T137/2262—And vent passage[s]

Definitions

  • SHEET 1 F 2 FLUID AMPLIFIER The invention relates to an amplifier based on fluid jet effects, in which for the operation of the amplifier necessary addition of fluid, to be entrained by the jet, takes place.
  • the purpose of the invention is to remove these drawbacks and is characterized in that the addition takes place exclusively by recirculation from a downstream area in an upward direction, the recirculation being separated from the nearest stream area of the main jet by one or more whether or not adjustable stream conductors in the jet cavity, forming one or more paths of recirculation and the jet cavity being exclusively connected with the vicinity by one or more blow openings.
  • the blow openings rise from these damping rooms.
  • variable constriction(s) in one or more path(s) of recirculation and/or blow opening(s).
  • the invention wil] further be elucidated by means of a drawing with amplifiers according to the prior art and to their improved version according to the invention.
  • FIG. 1 shows a wall effect amplifer without closing plate according to the prior art.
  • F IG. 2 shows a wall effect amplifer without closing plate modified according to the invention.
  • FIG. 3 shows a momentum amplifer without closing plate according to the prior art.
  • FIG. 4 shows a momentum amplifier without closihg plate modified according to the invention.
  • FIG. 5 shows a turbulence amplifer according to the prior art.
  • FIG. 6 shows a turbulence amplifer without closing plate according to the invention.
  • FIG. 7 shows a cross section according to the VII, VII of the complete amplifier according to FIG. 6.
  • the wall effect amplifier with OR/NOR function shown in FIG. 1 is provided with a supply 1 for primary fluid, control inputs 2, 2, a suction opening 3 for suctioning from the vicinity secondary fluid to be entrained, a jet cavity 4, two ventilation openings 5 and 6 and two outlets 7 and 8.
  • a suction opening 3 for suctioning from the vicinity secondary fluid to be entrained
  • a jet cavity 4 two ventilation openings 5 and 6 and two outlets 7 and 8.
  • Jet 11 wil try to entrain fluid from the vicinity, as long as control at the inlets 2 and 2 is absent and jet 11 attains this by suctioning fluid through opening 3 and through openings 5 and 6, if possible.
  • By choosing a suitable pressure level in the jet cavity 4 it can be arranged that blowing off exclusively takes place through openings 5 and 6, in order to obtain the logical function, however, it is necessary that suctioning is done through opening 3. This causes dust particles to be entrained from the vicinity, which particles may lead to an inter ference of the operation of an amplifer system.
  • the invention solves the dust problem by embedding the jet cavity as completely as possible and by avoiding suction openings as connections of the jet cavity with the vicinity and by constructing blow openings to the vicinity instead.
  • An amplifier of the type just described is shown in F IG. 2, improved according to indications according to the invention.
  • Wall 12 of stream conductor 14 takes over the function of wall 10 of FIG. 1. Opening 6 is connected to recirculation path 13.
  • the proportional momentum amplifer shown in FIG. 3 is very sensitive to interferences from the vicinity because of its open construction and moreover has the same drawbacks as regards fouling as the wall effect amplifier described above. Application of the invention to this amplifier results in the embodiment shown in FIG. 4.
  • Jet cavity 4 is embedded; by fitting stream conductors 17, 18 recirculation paths 24, 25 have been constructed, which are connected with the vicinity via outlet openings 19, 20. To avoid wall efiects short circuits 21, 22 have been fixed in stream conductors 17, 18.
  • the turbulence amplifer shown in F IG. 5 has the drawback of an unplanned recirculation. To reduce interference of the main stream by freely recirculating fluid, resulting in reduced stability and bad switching qualities, the embedding must be carried out loosely. Application of the invention to this turbulence amplifier offers the opportunity to meet the modern demand of miniaturization.
  • jet cavity 4 is provided with stream conductors 17, 18 with short circuits 21, 22 and blow openings 19, 20 connected with recirculation paths 24, 25, which came into existence through these stream conductors 17, 18.
  • screw-shaped adjustable constrictions can be fitted, in order to enable the optimalization of the conduct of the amplifer in a certain application.
  • the amplifier shown in FIGS. 6 and 7 is drawn to a scale of 5:1.
  • a fluid amplifier wherein a main jet is directed into an enclosed jet cavity for selective discharge through either of a pair of angularly related outlets, comprising a stream conductor defining one sidewall of the cavity, said fluid amplifier being formed to define a recirculation path distinct from said outlets extending on the remote side of said stream conductor from the jet cavity, said path being separated from the cavity solely by said stream conductor and communicating with said cavity at upstream and downstream locations, respectively, of
  • a fluid amplifier as defined claim l including a blow opening communicating with the recirculation path at said downstream location.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Amplifiers (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Jet Pumps And Other Pumps (AREA)
US781891A 1967-12-20 1968-12-06 Fluid amplifier Expired - Lifetime US3568700A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL676717363A NL148383B (nl) 1967-12-20 1967-12-20 Fluidumversterker.

Publications (1)

Publication Number Publication Date
US3568700A true US3568700A (en) 1971-03-09

Family

ID=19802041

Family Applications (1)

Application Number Title Priority Date Filing Date
US781891A Expired - Lifetime US3568700A (en) 1967-12-20 1968-12-06 Fluid amplifier

Country Status (6)

Country Link
US (1) US3568700A (US07816562-20101019-C00012.png)
JP (1) JPS4824583B1 (US07816562-20101019-C00012.png)
FR (1) FR1596803A (US07816562-20101019-C00012.png)
GB (1) GB1257649A (US07816562-20101019-C00012.png)
NL (1) NL148383B (US07816562-20101019-C00012.png)
SE (1) SE341893B (US07816562-20101019-C00012.png)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720218A (en) * 1971-12-07 1973-03-13 Us Army High speed decoupled fluidic switching device
US3754576A (en) * 1970-12-03 1973-08-28 Volvo Flygmotor Ab Flap-equipped power fluid amplifier
US3783904A (en) * 1972-08-01 1974-01-08 Matsushita Electric Ind Co Ltd Fluid amplifier
EP0251627A1 (en) * 1986-06-27 1988-01-07 THORN EMI Flow Measurement Limited Improvements in or relating to flowmeters
US7080664B1 (en) 2005-05-20 2006-07-25 Crystal Fountains Inc. Fluid amplifier with media isolation control valve

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3107850A (en) * 1961-03-17 1963-10-22 Raymond Wilbur Warren Fluid logic components
US3240219A (en) * 1962-11-26 1966-03-15 Bowles Eng Corp Fluid logic components
US3326227A (en) * 1964-01-07 1967-06-20 Ibm Pulse powered fluid device with flow asymmetry control
US3362421A (en) * 1963-05-28 1968-01-09 Ibm Bounded free jet fluid amplifier with turbulent attachment
US3402727A (en) * 1964-09-23 1968-09-24 Gen Electric Fluid amplifier function generator
US3420253A (en) * 1965-06-09 1969-01-07 Nasa Fluid jet amplifier
US3425432A (en) * 1965-04-29 1969-02-04 Corning Glass Works Bistable fluid amplifier
US3438384A (en) * 1960-07-15 1969-04-15 Hyman Hurvitz Electro-fluid systems
US3461777A (en) * 1966-11-18 1969-08-19 Gen Electric Fluid amplifier control

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3438384A (en) * 1960-07-15 1969-04-15 Hyman Hurvitz Electro-fluid systems
US3107850A (en) * 1961-03-17 1963-10-22 Raymond Wilbur Warren Fluid logic components
US3240219A (en) * 1962-11-26 1966-03-15 Bowles Eng Corp Fluid logic components
US3362421A (en) * 1963-05-28 1968-01-09 Ibm Bounded free jet fluid amplifier with turbulent attachment
US3326227A (en) * 1964-01-07 1967-06-20 Ibm Pulse powered fluid device with flow asymmetry control
US3402727A (en) * 1964-09-23 1968-09-24 Gen Electric Fluid amplifier function generator
US3425432A (en) * 1965-04-29 1969-02-04 Corning Glass Works Bistable fluid amplifier
US3420253A (en) * 1965-06-09 1969-01-07 Nasa Fluid jet amplifier
US3461777A (en) * 1966-11-18 1969-08-19 Gen Electric Fluid amplifier control

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Fluid Oscillator , A. E. Mitchell, I.B.M. Tech. Disclosure Bull. Vol. 5, No. 6, Nov., 1962. p. 25. (Copy in Scien. Lib. & Gp. 348, 137-81.5) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754576A (en) * 1970-12-03 1973-08-28 Volvo Flygmotor Ab Flap-equipped power fluid amplifier
US3720218A (en) * 1971-12-07 1973-03-13 Us Army High speed decoupled fluidic switching device
US3783904A (en) * 1972-08-01 1974-01-08 Matsushita Electric Ind Co Ltd Fluid amplifier
EP0251627A1 (en) * 1986-06-27 1988-01-07 THORN EMI Flow Measurement Limited Improvements in or relating to flowmeters
US7080664B1 (en) 2005-05-20 2006-07-25 Crystal Fountains Inc. Fluid amplifier with media isolation control valve

Also Published As

Publication number Publication date
DE1811668A1 (de) 1969-07-10
FR1596803A (US07816562-20101019-C00012.png) 1970-06-22
SE341893B (US07816562-20101019-C00012.png) 1972-01-17
JPS4824583B1 (US07816562-20101019-C00012.png) 1973-07-23
NL6717363A (US07816562-20101019-C00012.png) 1969-06-24
NL148383B (nl) 1976-01-15
GB1257649A (US07816562-20101019-C00012.png) 1971-12-22
DE1811668B2 (de) 1975-12-18

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