GB1492390A - Pitch change means for the fan blades of a bypass ducted fan propulsion engine - Google Patents

Pitch change means for the fan blades of a bypass ducted fan propulsion engine

Info

Publication number
GB1492390A
GB1492390A GB53400/74A GB5340074A GB1492390A GB 1492390 A GB1492390 A GB 1492390A GB 53400/74 A GB53400/74 A GB 53400/74A GB 5340074 A GB5340074 A GB 5340074A GB 1492390 A GB1492390 A GB 1492390A
Authority
GB
United Kingdom
Prior art keywords
blades
propulsion engine
pitch
change means
pitch change
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
GB53400/74A
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.)
Raytheon Technologies Corp
Original Assignee
United Aircraft Corp
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 United Aircraft Corp filed Critical United Aircraft Corp
Publication of GB1492390A publication Critical patent/GB1492390A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • 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
    • F01D7/00—Rotors with blades adjustable in operation; Control thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
    • F04D29/322—Blade mountings
    • F04D29/323—Blade mountings adjustable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/36—Application in turbines specially adapted for the fan of turbofan engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05D2260/74—Adjusting of angle of incidence or attack of rotating blades by turning around an axis perpendicular the rotor centre line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05D2260/76—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism using auxiliary power sources

Abstract

1492390 Variable pitch blades; jet propulsion engines UNITED AIRCRAFT CORP 10 Dec 1974 [8 April 1974] 53400/74 Headings F1C F1J and F1T Impeller blades 12 of a ducted fan for a jet propulsion engine are varied in pitch by a ring gear 20 the surface 22 of which is wave-like, which engages non-circular gears 18 such that adjacent blades rotate at different rates. As reversal of pitch from that in Fig. 2A to that in Fig. 2C is effected by rotating gear 20, the blades will pass through the intermediate position, Fig. 2B, at different times so that even if they overlap, adjacent blades will not interfere with each other.
GB53400/74A 1974-04-08 1974-12-10 Pitch change means for the fan blades of a bypass ducted fan propulsion engine Expired GB1492390A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US459244A US3876334A (en) 1974-04-08 1974-04-08 Variable pitch rate means

Publications (1)

Publication Number Publication Date
GB1492390A true GB1492390A (en) 1977-11-16

Family

ID=23823992

Family Applications (1)

Application Number Title Priority Date Filing Date
GB53400/74A Expired GB1492390A (en) 1974-04-08 1974-12-10 Pitch change means for the fan blades of a bypass ducted fan propulsion engine

Country Status (4)

Country Link
US (1) US3876334A (en)
DE (1) DE2458061A1 (en)
FR (1) FR2266630B3 (en)
GB (1) GB1492390A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2237072A (en) * 1989-09-06 1991-04-24 Rolls Royce Plc A variable pitch arrangement for a gas turbine engine
GB2301868A (en) * 1995-06-05 1996-12-18 Rolls Royce Plc Actuator mechanism with emergency drive for variable angle vane arrays
US5630701A (en) * 1995-06-05 1997-05-20 Rolls-Royce Plc Variable angle vane arrays

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5931637A (en) * 1996-01-22 1999-08-03 Something Else Limited Liability Company Propeller with variable rate of pitch change
US5865599A (en) * 1997-03-11 1999-02-02 United Technologies Corporation System and process for direct blade angle measurement in propulsion systems
DE102004035631B4 (en) * 2004-07-22 2006-04-13 Hägele GmbH Fan wheel for e.g. cooling system of internal combustion engine has bowl shaped hub and adjustable fan blades wherein slide way runs in positioning direction of the positioning piston
US7331761B2 (en) * 2005-11-10 2008-02-19 Kaydon Corporation Wind turbine pitch bearing and method
US8287238B2 (en) * 2008-02-29 2012-10-16 General Electric Company Hub pitch gear repair method
US7944067B2 (en) * 2008-04-01 2011-05-17 General Electric Company System and method for reducing rotor loads in a wind turbine upon detection of blade-pitch failure and loss of counter-torque
CN102333962A (en) * 2009-02-27 2012-01-25 斯奈克玛 Fan blades with cyclic setting
FR2956377B1 (en) * 2010-02-12 2012-09-14 Snecma DEVICE FOR CREMALLER CONTROL OF THE ANGULAR POSITION OF TURBOMACHINE SWIVELING BLADES
BRMU9100274U2 (en) * 2011-02-09 2013-05-07 Jose Roberto Alves reversible fan for cooling and radiator cleaning
CN102410252B (en) * 2011-11-16 2013-09-04 格力电器（中山）小家电制造有限公司 Dispersed wind adjusting mechanism
GB201202383D0 (en) 2012-02-13 2012-03-28 Rolls Royce Plc A unison ring gear assembly
US20140064912A1 (en) * 2012-08-29 2014-03-06 General Electric Company Systems and Methods to Control Variable Stator Vanes in Gas Turbine Engines
EP2984316B1 (en) * 2013-04-08 2020-12-16 United Technologies Corporation Geared annular airflow actuation system for variable cycle gas turbine engines
FR3005096B1 (en) * 2013-04-29 2018-01-19 Safran Aircraft Engines SYSTEM FOR CONTROLLING THE PITCH OF THE BLADES OF A TURBOMACHINE PROPELLER AND A PROPELLER TURBOMACHINE FOR AN AIRCRAFT WITH SUCH A SYSTEM
US9835037B2 (en) * 2015-06-22 2017-12-05 General Electric Company Ducted thrust producing system with asynchronous fan blade pitching
DE102016114910A1 (en) * 2015-09-08 2017-03-09 Flexxaire Inc. Shovel for a variable-displacement fan
US11391298B2 (en) * 2015-10-07 2022-07-19 General Electric Company Engine having variable pitch outlet guide vanes
US10288083B2 (en) 2015-11-16 2019-05-14 General Electric Company Pitch range for a variable pitch fan
US10288087B2 (en) 2016-03-24 2019-05-14 United Technologies Corporation Off-axis electric actuation for variable vanes
US10301962B2 (en) 2016-03-24 2019-05-28 United Technologies Corporation Harmonic drive for shaft driving multiple stages of vanes via gears
US10458271B2 (en) 2016-03-24 2019-10-29 United Technologies Corporation Cable drive system for variable vane operation
US10329946B2 (en) 2016-03-24 2019-06-25 United Technologies Corporation Sliding gear actuation for variable vanes
US10294813B2 (en) * 2016-03-24 2019-05-21 United Technologies Corporation Geared unison ring for variable vane actuation
US10443431B2 (en) * 2016-03-24 2019-10-15 United Technologies Corporation Idler gear connection for multi-stage variable vane actuation
US10190599B2 (en) 2016-03-24 2019-01-29 United Technologies Corporation Drive shaft for remote variable vane actuation
US10443430B2 (en) 2016-03-24 2019-10-15 United Technologies Corporation Variable vane actuation with rotating ring and sliding links
US10329947B2 (en) 2016-03-24 2019-06-25 United Technologies Corporation 35Geared unison ring for multi-stage variable vane actuation
US10415596B2 (en) 2016-03-24 2019-09-17 United Technologies Corporation Electric actuation for variable vanes
EP3241743B1 (en) 2016-05-02 2018-12-26 Ratier-Figeac SAS Blade pitch control

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1812814A (en) * 1929-06-18 1931-06-30 Willem P Van Lammeren Propeller
US2460559A (en) * 1943-10-09 1949-02-01 Wildhaber Ernest Blade pitch adjustment
US2491260A (en) * 1945-07-06 1949-12-13 Albert A Green Pitch control mechanism for helicopters
GB1400718A (en) * 1971-12-11 1975-07-23 Lucas Industries Ltd Control vane arrangement for a turbine
US3820916A (en) * 1972-05-12 1974-06-28 I Brusilovsky Axial flow reversible fan

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2237072A (en) * 1989-09-06 1991-04-24 Rolls Royce Plc A variable pitch arrangement for a gas turbine engine
GB2237072B (en) * 1989-09-06 1993-12-01 Rolls Royce Plc A variable pitch arrangement for a gas turbine engine
GB2301868A (en) * 1995-06-05 1996-12-18 Rolls Royce Plc Actuator mechanism with emergency drive for variable angle vane arrays
US5620301A (en) * 1995-06-05 1997-04-15 Rolls-Royce Plc Actuator mechanism for variable angle vane arrays
US5630701A (en) * 1995-06-05 1997-05-20 Rolls-Royce Plc Variable angle vane arrays
GB2301868B (en) * 1995-06-05 1999-08-11 Rolls Royce Plc Improved actuator mechanism for variable angle vane arrays

Also Published As

Publication number Publication date
FR2266630A1 (en) 1975-10-31
US3876334A (en) 1975-04-08
FR2266630B3 (en) 1977-09-23
DE2458061A1 (en) 1975-10-09

Similar Documents

Publication Publication Date Title
GB1492390A (en) Pitch change means for the fan blades of a bypass ducted fan propulsion engine
GB1507167A (en) Control system for variable pitch fan propulsor with reverse pitch
GB1233718A (en)
GB1521510A (en) Pitch change actuator for a rotor blade
GB1521544A (en) Pitch-change apparatus for a ducted thrust fan
GB1400718A (en) Control vane arrangement for a turbine
GB1071095A (en) Noise abatement method and apparatus
GB1454233A (en) Variable pitch ducted fan propulsion assembly
GB1119382A (en) Axial-flow compressors with two contra-rotatable rotors
GB1296061A (en)
AU466679B2 (en) Gas turbine engine blades
GB1533133A (en) Propeller with foldable blades
GB1274226A (en) Variable-pitch bladed rotors
GB1145237A (en) Hydraulic jet propulsion apparatus
GB1004953A (en) Improvements in and relating to gas turbine plants
FR2286952A1 (en) Windmill with multiple co-axial rotors - extracts energy from wind over whole of cross section of flow
GB1410481A (en) Control vane arrangement for a turbine
GB1064089A (en) Improvements in and relating to gas turbines
GB1516364A (en) Pitch change signal means with differential gearing
US2182285A (en) Adjusting mechanism for propeller blades and the like
GB189751A (en) Improvements relating to paddle-wheel propellers
FR2277993A1 (en) Fluid flow powered generator - has planetary vanes partially rotating to reduce drag
GB1140563A (en) Air-cushion vehicles and rotary compressors therefor
IT1052002B (en) Sailing boat auxiliary drive propeller feathering mechanism - has bevel gears permitting partial blade rotation on engine start up
GB984955A (en) Nozzle for a jet engine

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee