US3881508A - Throttle valve arrangement - Google Patents

Throttle valve arrangement Download PDF

Info

Publication number
US3881508A
US3881508A US403006A US40300673A US3881508A US 3881508 A US3881508 A US 3881508A US 403006 A US403006 A US 403006A US 40300673 A US40300673 A US 40300673A US 3881508 A US3881508 A US 3881508A
Authority
US
United States
Prior art keywords
throttle valve
control member
orifice
fixed orifice
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.)
Expired - Lifetime
Application number
US403006A
Other languages
English (en)
Inventor
Trevor Stanley Smith
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.)
Northrop Grumman Properties Ltd
Original Assignee
Lucas Aerospace 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 Lucas Aerospace Ltd filed Critical Lucas Aerospace Ltd
Application granted granted Critical
Publication of US3881508A publication Critical patent/US3881508A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
    • F02C9/26—Control of fuel supply
    • F02C9/32—Control of fuel supply characterised by throttling of fuel
    • 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
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7784—Responsive to change in rate of fluid flow
    • Y10T137/7787—Expansible chamber subject to differential pressures
    • Y10T137/7788—Pressures across fixed choke
    • 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
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7784—Responsive to change in rate of fluid flow
    • Y10T137/7787—Expansible chamber subject to differential pressures
    • Y10T137/7791—Pressures across flow line valve

Definitions

  • a throttle valve arrangement includes a fixed orifice in series with a variable orifice constituted by a throttle valve member coacting with ports.
  • the throttle valve member is spring loaded to a fully open position and has an area at one end subjected to the pressure downstream of the fixed orifice to urge the throttle valve member in the same direction as the spring load ing. A smaller area at the opposite end is subjected to the pressure upstream of the fixed restrictor. A step in the valve member is subjected to pressure downstream of the variable restrictor.
  • a throttle valve arrangement in accordance with the invention comprises a fixed orifice and a variable orifice in series, the variable orifice being in the form of a throttle valve member movable in a valve-closing direction against spring loading by fluid pressure, said valve member having a first portion subjected to the pressure upstream of the fixed orifice to urge the valve member towards its closed position, a second portion larger than said first portion subjected to the pressure downstream of the fixed orifice to urge the valve member towards its open position and a third portion subjected to the pressure downstream of the valve arrangement to urge the valve member towards its closed position.
  • the throttle valve arrangement shown includes a body in which a sleeve ll is fitted.
  • the sleeve ll has an array of ports 12 which form, in combination with a throttle valve member 13, a variable orifice.
  • the valve member 13 has gear teeth which are engaged, in use, by another gear to rotate the member l3 relative to the sleeve 11.
  • the member 13 is itself in the general form of a sleeve, having a cylindrical outer surface and a stepped cylindrical interior surface.
  • the end of the member 13 having the larger internal diameter is rotatably received by a bearing 15 and is disposed in an inlet chamber 16.
  • a spigot member I7 is mounted on the body 10 and extends into this end of the member 13 and has at its free end a head l9 of stepped cylindrical form engaging the interior surface of the member 13 on opposite sides of the step 18 thereon.
  • the spigot member 17 is tubular and is formed with a hole 20 in its wall and a series of further holes 21 which, in combination form a fixed flow restrictor through which fluid passing from the inlet chamber 16 to the ports 12 must pass.
  • the body 10 has an internal groove 22 surrounding the ports 12 and this groove is connected by drillings 23, 24 in the sleeve 11 and bearing 25 therein to an external groove 26 in the member 13. Drillings in the member l3 connect the groove 26 to an annular chamber 9 defined between the head 19 and the interior of the member 13.
  • the throttle valve arrangement is used in combination with a gear pump 27 which is driven by the engine 28 and a centrifugal type boost pump 29 ganged with the gear pump.
  • the outlet of the pump 27 is connected to the chamber 16 and the outlet of the pump 29 is connected both to the inlet of the pump 27 and to a chamber 30 surrounding the gear 14.
  • the groove 22 is connected via a fuel metering system 3], which receives various input signals from the engine 28 and a manual control 32, to the burners of the engine 28.
  • the end of the sleeve ll communicates with a spill valve 33 which is subjected to a pressure signal from the downstream side of the metering system so that the amount of fuel spilled depends on the total pressure drop through the throttle valve (ll, 12, 13) and the metering system 31.
  • a pressure relief valve 34 is connected between the end of the sleeve ll and the chamber 30 but this only opens when the valve 33 is unable to spill sufficient fuel to reduce the pressure at the end of sleeve 11 below the pressure at which valve 34 opens, e.g., when a shut-off cock 37, downstream of the system 31 and the connection therefrom to the valve 33, is shut.
  • an electrically actuated restrictor 35 controlled by one or more signals derived from the engine, is connected between the chamber 16 and the end of the sleeve 11.
  • the member 13 is urged by a spring 36 to a wideopen position as shown.
  • a pressure drop is created by the fixed orifice 20, 21.
  • This pressure drop is sensed by the member 13, and a valve-closing force is applied thereto.
  • the valve is wide open the pressure in the chamber 9 is substantially equal to the pressure downstream of the fixed orifice.
  • the valveclosing force is sufficient to overcome the spring loading the valve commences to close. thereby reducing the pressure acting in the chamber 9.
  • the provision of the chamber 9 has the result of effectively increasing the rate of spring 36 and also has the effect of stabilising the valve against low frequency pressure fluctuations.
  • valve 33 ensures that the total pressure drop through the valve ll, 13 and the metering system is substantially constant so that the rate of fuel flow to the engine is properly controlled in accordance with both the engine parameters controlling the metering system 31 and the engine speed which is the sole factor determining the rate offuel flow through the fixed orifice 20, 2i, when the valve 35 is closed.
  • the valve 35 provides a trim for the system by by-passing some of the fuel pumped by the gear pump 27 so that the fixed orifice serves a reduced flow.
  • a throttle valve arrangement for use in a gas turbine engine comprising an inlet, an outlet, a fixed orifice and a variable orifice in series between said inlet and outlet, said variable orifice being on a side of said fixed orifice remote from said inlet and said variable orifice having a piston control member, a spring biasing said control member in a direction to open said variable orifice, said control member comprising a sleeve having first, second and third areas respectively responsive to the pressures on the inlet side of said fixed orifice, on the side of said fixed orifice remote from said inlet side and on the outlet side of said variable orifice, an increase in the pressure on said first and third areas urging the control member towards its closed position and an increase in the pressure on said second area urging the control member towards its open position, said sleeve having a stepped cylindrical internal surface, a tubular member extending into the interior of the control member and having a head of stepped cylindrical form engaging the interior of the control member on opposite sides of the

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Valves (AREA)
  • Control Of Turbines (AREA)
US403006A 1972-10-03 1973-10-03 Throttle valve arrangement Expired - Lifetime US3881508A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4545872A GB1438112A (en) 1972-10-03 1972-10-03 Throttle valve arrangement

Publications (1)

Publication Number Publication Date
US3881508A true US3881508A (en) 1975-05-06

Family

ID=10437278

Family Applications (1)

Application Number Title Priority Date Filing Date
US403006A Expired - Lifetime US3881508A (en) 1972-10-03 1973-10-03 Throttle valve arrangement

Country Status (6)

Country Link
US (1) US3881508A (de)
JP (1) JPS5939631B2 (de)
DE (1) DE2349368C3 (de)
FR (1) FR2201403B1 (de)
GB (1) GB1438112A (de)
IT (1) IT996224B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5904177A (en) * 1997-03-17 1999-05-18 Marotta Scientific Controls, Inc. Fluid flow control device
KR100375176B1 (ko) * 2000-07-06 2003-03-15 (주) 한창게이지산업 고압수 제어용 버티컬 타입 스프레이 밸브
US20080196774A1 (en) * 2007-02-21 2008-08-21 Victaulic Company Constant flow rate valve
CN102865109A (zh) * 2012-09-26 2013-01-09 中国神华能源股份有限公司 汽轮机的高压主汽门装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0127717B1 (de) * 1983-06-02 1987-10-14 Societe Nationale D'etude Et De Construction De Moteurs D'aviation, "S.N.E.C.M.A." Durchflussregler mit integriertem Druckabfalldetektor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1050763A (en) * 1912-02-21 1913-01-14 George W Kimball Fluid-delivery and pressure-governing device.
US1065973A (en) * 1911-11-07 1913-07-01 Samuel C Shaffner Gas-regulator.
US2583296A (en) * 1945-06-18 1952-01-22 Vickers Inc Flow regulating valve
US2865397A (en) * 1954-10-06 1958-12-23 United States Steel Corp Hydraulic governor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1299943B (de) * 1960-11-23 1969-07-24 Plessey Co Ltd Brennstoffregeleinrichtung
DE1807755A1 (de) * 1968-11-08 1970-05-27 Daimler Benz Ag Rotationskolben-Einspritzbrennkraftmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1065973A (en) * 1911-11-07 1913-07-01 Samuel C Shaffner Gas-regulator.
US1050763A (en) * 1912-02-21 1913-01-14 George W Kimball Fluid-delivery and pressure-governing device.
US2583296A (en) * 1945-06-18 1952-01-22 Vickers Inc Flow regulating valve
US2865397A (en) * 1954-10-06 1958-12-23 United States Steel Corp Hydraulic governor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5904177A (en) * 1997-03-17 1999-05-18 Marotta Scientific Controls, Inc. Fluid flow control device
KR100375176B1 (ko) * 2000-07-06 2003-03-15 (주) 한창게이지산업 고압수 제어용 버티컬 타입 스프레이 밸브
US20080196774A1 (en) * 2007-02-21 2008-08-21 Victaulic Company Constant flow rate valve
US7647942B2 (en) 2007-02-21 2010-01-19 Victaulic Company Constant flow rate valve
CN102865109A (zh) * 2012-09-26 2013-01-09 中国神华能源股份有限公司 汽轮机的高压主汽门装置
CN102865109B (zh) * 2012-09-26 2015-03-25 中国神华能源股份有限公司 汽轮机的高压主汽门装置

Also Published As

Publication number Publication date
DE2349368C3 (de) 1981-04-30
IT996224B (it) 1975-12-10
GB1438112A (en) 1976-06-03
JPS4972720A (de) 1974-07-13
DE2349368A1 (de) 1974-04-11
FR2201403A1 (de) 1974-04-26
FR2201403B1 (de) 1976-06-18
JPS5939631B2 (ja) 1984-09-25
DE2349368B2 (de) 1980-06-26

Similar Documents

Publication Publication Date Title
US2905191A (en) Valve
US3808801A (en) Fuel control system for gas turbine engine
US3434395A (en) Pressure responsive mechanism
US4531706A (en) Pressure operated control installation
US2594689A (en) Fluid operated speed governor
US4458713A (en) Bypass-type differential pressure regulator
US4549566A (en) Flow volume control device for power steering system
US4649700A (en) Fuel control system
US3881508A (en) Throttle valve arrangement
US3566901A (en) Fuel regulating valve
US3309995A (en) Liquid pumping apparatus
US3991569A (en) Fuel control system for gas turbine engine
US5192196A (en) Flow control orifice for parallel flow fluid supply to power steering gear
US2649107A (en) Hydraulic valve system
US3113583A (en) Relief valve
GB1236681A (en) Control system for motor vehicle type gas turbine engine
US4394811A (en) Fuel control for gas turbine with continuous pilot flame
US4040599A (en) Flow control valves for liquids
US3784329A (en) Fuel supply arrangements for gas turbine engines
US3374800A (en) Gas turbine engine control having by-pass valve means
US3808798A (en) Fuel control system for gas turbine engine
US4776560A (en) Fuel flow control valve
GB1235846A (en) Liquid supply apparatus
US3958414A (en) Control valve arrangement for gas turbine engine fuel supply system
US2876756A (en) Fuel injection system