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US2997061A - Volume governor for a flowing gaseous medium - Google Patents

Volume governor for a flowing gaseous medium Download PDF

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Publication number
US2997061A
US2997061A US731044A US73104458A US2997061A US 2997061 A US2997061 A US 2997061A US 731044 A US731044 A US 731044A US 73104458 A US73104458 A US 73104458A US 2997061 A US2997061 A US 2997061A
Authority
US
United States
Prior art keywords
governor
gaseous medium
flow
volume governor
valve
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
US731044A
Other languages
English (en)
Inventor
Allander Claes
Larkfeldt Birger
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.)
Svenska Flaktfabriken AB
Original Assignee
Svenska Flaktfabriken AB
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 Svenska Flaktfabriken AB filed Critical Svenska Flaktfabriken AB
Application granted granted Critical
Publication of US2997061A publication Critical patent/US2997061A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/34—Excess-flow valves in which the flow-energy of the flowing medium actuates the closing mechanism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/52—Means for additional adjustment of the rate of flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/75—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity for maintaining constant air flow rate or air velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/16—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of parallelly-movable plates
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/01—Control of flow without auxiliary power
    • G05D7/0106—Control of flow without auxiliary power the sensing element being a flexible member, e.g. bellows, diaphragm, capsule
    • 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
    • Y10T137/6851—With casing, support, protector or static constructional installations
    • Y10T137/7036—Jacketed
    • 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
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7869—Biased open

Definitions

  • the present invention relates to a volume governor for a flowing gaseous medium, preferably to be used in ventilating plants, said governor being constructed as a flow passage for the medium and having one of its two opposite walls movable and arranged to be actuated by the static pressure of the medium at the inlet of the governor.
  • the main object of the present invention is to'produce a regulator satisfying high requirements for noise-elimination and simultaneously having good governing properties.
  • the governor according to the invention may also be used as a shutting-off valve.
  • the pressure reducing effect of the governor has without any exceptions been based on the principle of varying the throttling of a channel which is very short with respect to its flow area.
  • a regulator functioning in accordance with said principle, the available pressure energy will be converted into an increased energy in the air in form of whirls, i.e. (hydrodynamically expressed) the pressure energy is bound to the air in form of turbulent whirl energy. Because such an energy conversion always causes a considerable quality of free sound energy, such regulators must always be used in combination with a separate sound deadening means in ventilating plants for human habitations.
  • the conversion of pressure energy into heat takes place without the occurrence of whirls. This is the case in laminar currents, where the dependence of the viscosity will guarantee the energy absorption.
  • the deciding factor for the degree of the occurrence of whirls in a flow passage for a medium is the actual Reynolds number for the flow. This number is defined as the product of the flow velocity of the medium and the hydraulic diameter of said flow passage divided by the kinetic viscosity of the flowing medium.
  • the hydraulic diameter of a duct is determined by dividing its perimeter into its cross-sectional area and multiplying by four. In a long channel a shifting from laminar to turbulent flow occurs at a value of the Reynolds number of about 2000.
  • the present invention is based on this very fact and the governor according to the invention is thus constructed with a small hydraulic diameter and further made with such a large length of the flow passage so that there is time enough for a laminar flow to arise. In this way a flow substantially free from whirls will be obtained and as the necessary absorption of the pressure energy takes place without any substantial occurrence of whirls, the arising noise in the ventilating system will be of no intensity to speak about.
  • the hydraulic diameter is of decided importance and said diameter is to be made small, the flow passage of the governor at the usual air quantities must be given a rather elongated cross section area. It has proved effective to dimension the volume governor to correspond to the width of the ventilating apparatus, in which the governor is to be used.
  • the volume governor according to the invention is mainly characterized in that the flow passage is formed in such a manner that in any position of the movable wall, the length of the flow passage as reckoned in the flow direction of the medium is considerably larger than its hydraulic diameter, and its flow area is so dimena sioned that the medium flows through the channel without the occurrence of any whirls.
  • the volume governor is preferably so constructed that the length of the flow passage exceeds five times the hydraulic diameter.
  • the flow passage should further suitably be given such a hydraulic diameter that the Reynolds number does not exceed 2000 at the maximum flow velocity of the gaseous medium.
  • the Walls of the flow passage are covered with a sound deadening material.
  • the movable Wall may be arranged to entirely shut off the flow passage area for the gaseous medium by a manual adjustment.
  • FIG. 1 shows a longitudinal cross section through an exemplifying embodiment of a volume governor according to the invention.
  • FIG. 2 shows a cross section through a volume governor along the line 2--2 in FIG. 1.
  • a volume governor 1 isconnected to a duct 2 for a gaseous medium, in which duct an opening 2a is arranged for the application of the invented volume governor.
  • the casing 3 of the governor 1 encloses a space 4 directly communioating with said duct, said space terminating into an outlet chamber 5 of smaller width.
  • the walls of the casing are covered with a sound-deadening material 3a, and adjacent said chamber 5 are formed to function as a seat for a valve means 6 movably arranged in said casing.
  • the flow passage formed between said valve means and the walls of the casing is designated 7.
  • the valve means 6 is shaped as an elongated plate having an inverted generally U-shaped cross-section, and has a covering 6a of sound-deadening material.
  • the valve element 6 is guided at both ends by an axially movable rod 8, mounted in two bushings 9 and 10.
  • a bushing 11 is fastened to said valve means and slidably engages said rod 8.
  • the valve means 6 is actuated by the static pressure prevailing in the space 4 to move against said seat, and is counteracted by a helical spring 12 surrounding said rod 8.
  • the spring 12 one end of which rests against the valve means, supports at its opopsite end a washer 15, which, in turn, rests on a stop washer 13, fixed to the rod 8.
  • a membrane 17 is arranged between the washers 13 and 15 and is fastened to supporting plates 16 fixed to the end walls of said outlet chamber 5.
  • the rod 8 is arranged to be axially movable. This movement is effected by means of a lever 20, arranged on a shaft 21, said shaft being arranged to be turned by means of an adjusting maneuvering knob or arm (not shown in the drawing).
  • the free end of the lever 20 is equipped with a stud 22, engaging a groove in a sleeve 19 fixed to the rod 8.
  • TIllemovements of the rod 8 are transmitted .to the valve means by a washer 14 fixed to the rod 8. Between said washer 14 and the bushing 11 there is'arranged a damping packing 18.
  • a volume governor for a flowing gaseous medium comprising a channel-like open-ended casing, a valve seat in said casing, an axially displace-able valve disk cooperating with said seat, guiding means for said valve disk and biasing means tending to hold said valve disk at a normal position a predetermined distance from said valve seat against the pressure of the flowing gaseous medium and operable upon increase of pressure of the medium to afford displacement of said valve disk toward said seat and to maintain said flow substantially constant, characterized in that the casing is formed'with a rectangular, very elongated cross section area and with the valve seat constituted by an inwardly projecting part of each of two opposite longitudinal walls of the casing, the longitudinal edges of said valve disk conforming with said inwardly projecting parts of said side walls to form two narrow flow passages of uniform Width dimensioned so that the length of said flow passages in the flow direction exceeds five times the hydraulic diameter of same insaid normal position of the valve disk.
  • a volume governor according to claim '1 including a sound-deadening material covering the walls of the fiow passages.
  • a volume governor according to claim 1 characterized in that the biasing means comprises springs attached to the guidingmeans for the valve disk, said guiding means being axially displaceable rods at each end of the valve disk and arranged to be manually adjustable to set the volume governor for different, predetermined values of the medium flow and to entirely shut off the how passage area for the gaseous medium.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Details Of Valves (AREA)
  • Safety Valves (AREA)
  • Air-Flow Control Members (AREA)
US731044A 1957-04-30 1958-04-25 Volume governor for a flowing gaseous medium Expired - Lifetime US2997061A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE415057 1957-04-30

Publications (1)

Publication Number Publication Date
US2997061A true US2997061A (en) 1961-08-22

Family

ID=20263633

Family Applications (1)

Application Number Title Priority Date Filing Date
US731044A Expired - Lifetime US2997061A (en) 1957-04-30 1958-04-25 Volume governor for a flowing gaseous medium

Country Status (7)

Country Link
US (1) US2997061A (es)
BE (1) BE567265A (es)
CH (1) CH365851A (es)
DK (1) DK102983C (es)
FR (1) FR1195178A (es)
GB (1) GB847438A (es)
NL (1) NL107698C (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3206944A (en) * 1962-11-05 1965-09-21 Albert M Gallo Ice cube making machine
EP1701105A2 (de) * 2005-03-04 2006-09-13 Zehnder Verkaufs- und Verwaltungs AG Vorrichtung zur Gasmengenregulierung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES264920A1 (es) * 1960-02-19 1961-07-16 Svenska Fl Ktfabriken A B Dispositivo para mantener constante la presiën estatica
CN109261228A (zh) * 2018-09-10 2019-01-25 伟奥仕（北京）科技有限公司 一种恒温恒湿的环境仓

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59725C (de) * W. STEEGER in Vohwinkel Windregler
US569943A (en) * 1896-10-20 Relief-valve
US2311381A (en) * 1941-02-24 1943-02-16 Macclatchie Mfg Company Of Cal Device for damping pressure
US2644389A (en) * 1949-10-27 1953-07-07 W B Connor Engineering Corp Diffuser for air conditioning systems
US2813474A (en) * 1953-08-04 1957-11-19 Anemostat Corp America High velocity air distribution apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59725C (de) * W. STEEGER in Vohwinkel Windregler
US569943A (en) * 1896-10-20 Relief-valve
US2311381A (en) * 1941-02-24 1943-02-16 Macclatchie Mfg Company Of Cal Device for damping pressure
US2644389A (en) * 1949-10-27 1953-07-07 W B Connor Engineering Corp Diffuser for air conditioning systems
US2813474A (en) * 1953-08-04 1957-11-19 Anemostat Corp America High velocity air distribution apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3206944A (en) * 1962-11-05 1965-09-21 Albert M Gallo Ice cube making machine
EP1701105A2 (de) * 2005-03-04 2006-09-13 Zehnder Verkaufs- und Verwaltungs AG Vorrichtung zur Gasmengenregulierung
EP1701105A3 (de) * 2005-03-04 2009-03-18 Zehnder Verkaufs- und Verwaltungs AG Vorrichtung zur Gasmengenregulierung

Also Published As

Publication number Publication date
NL107698C (es) 1964-02-18
FR1195178A (fr) 1959-11-16
CH365851A (de) 1962-11-30
GB847438A (en) 1960-09-07
BE567265A (es) 1960-08-12
DK102983C (da) 1965-11-01

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