GB842451A - Control of axial flow machines - Google Patents

Control of axial flow machines

Info

Publication number
GB842451A
GB842451A GB3343156A GB3343156A GB842451A GB 842451 A GB842451 A GB 842451A GB 3343156 A GB3343156 A GB 3343156A GB 3343156 A GB3343156 A GB 3343156A GB 842451 A GB842451 A GB 842451A
Authority
GB
United Kingdom
Prior art keywords
lever
guide vanes
forces
piston
movable
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
Application number
GB3343156A
Inventor
William Hammett Arscott
Frederick Henry Carey
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.)
Bristol Siddeley Engines Ltd
Dowty Fuel Systems Ltd
Original Assignee
Dowty Fuel Systems Ltd
De Havilland Engine Co 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 Dowty Fuel Systems Ltd, De Havilland Engine Co Ltd filed Critical Dowty Fuel Systems Ltd
Priority to GB3343156A priority Critical patent/GB842451A/en
Publication of GB842451A publication Critical patent/GB842451A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
    • F02K1/06—Varying effective area of jet pipe or nozzle
    • F02K1/15—Control or regulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
    • F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
    • F01D17/26—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical fluid, e.g. hydraulic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F04D27/0246—Surge control by varying geometry within the pumps, e.g. by adjusting vanes

Abstract

842,451. Axial-flow compressors; gas turbine plant. DE HAVILLAND ENGINE CO. Ltd., and DOWTY FUEL SYSTEMS Ltd. Oct. 31, 1957 [Nov. 1, 1956], No. 33431/56. Classes 110 (1) and 110 (3). [Also in Group XXIX] An apparatus for adjusting the angle of incidence of the guide vanes or stator blades of a gas turbine plant compressor comprises a control member connected to the guide vanes, a movable member subject to opposing forces which vary respectively in accordance with variations in at least two independent variable operating conditions, means operated by movement of said movable element to adjust the effective value of at least one of the forces relative to the other in a sense such as to obtain a balance between the forces and means for adjusting the control member in response to movement of the movable member. The movable member comprises a floating lever 14 subject on its left-hand side to a force applied by a differential expansion thermometer 11 exposed to air at the compressor intake. The right-hand side of the lever is subject to a force applied by a centrifugal governor 10 via linkages 12, 15 and an adjustable hinge point 16. The left-hand end of the lever 14 is connected to a pair of half-ball hydraulic relief valves 17, 18 controlling the escape of pressure fluid from one side or the other of a servo piston 23 to which fluid under pressure is supplied by a line 20. The piston 23 is connected by a link 24 to the movable fulcrum 25. Thus any movement of the lever 14 due to an out-of-balance force will cause the valves 17, 18 to allow fluid to escape from one side or the other of the piston 23 which will, in turn, cause the fulcrum to take up a position in which the forces are again balanced. The link 24 is also connected via a cam arrangement 31 to a servo-control valve 33 controlling the supply of fluid to a servo piston 35 connected by a link 37 to the guide vanes. The effect of ram pressure may also be applied as a third force to the differential lever 14. In another embodiment the temperature and speed loadings are applied to separate pivoted levers separated by a twin roller assembly constituting the movable fulcrum. In this embodiment the roller is adjusted to bring the levers into balanced condition by a cam arrangement operated by the linkage from the servo piston to the guide vanes.
GB3343156A 1956-11-01 1956-11-01 Control of axial flow machines Expired GB842451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3343156A GB842451A (en) 1956-11-01 1956-11-01 Control of axial flow machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3343156A GB842451A (en) 1956-11-01 1956-11-01 Control of axial flow machines

Publications (1)

Publication Number Publication Date
GB842451A true GB842451A (en) 1960-07-27

Family

ID=10352868

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3343156A Expired GB842451A (en) 1956-11-01 1956-11-01 Control of axial flow machines

Country Status (1)

Country Link
GB (1) GB842451A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172259A (en) * 1962-03-02 1965-03-09 Avco Corp Variable geometry control for gas turbine engines
US3377799A (en) * 1966-01-03 1968-04-16 Gen Electric Mechanical integrators and control systems employing same
FR2236106A1 (en) * 1973-07-05 1975-01-31 Lucas Aerospace Ltd
FR2687729A1 (en) * 1992-02-26 1993-08-27 Snecma Device for automatically controlling the positioning angle of variable-pitch blading of turbomachines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172259A (en) * 1962-03-02 1965-03-09 Avco Corp Variable geometry control for gas turbine engines
US3377799A (en) * 1966-01-03 1968-04-16 Gen Electric Mechanical integrators and control systems employing same
FR2236106A1 (en) * 1973-07-05 1975-01-31 Lucas Aerospace Ltd
FR2687729A1 (en) * 1992-02-26 1993-08-27 Snecma Device for automatically controlling the positioning angle of variable-pitch blading of turbomachines

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