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GB1363426A - Bladed rotors - Google Patents

Bladed rotors

Info

Publication number
GB1363426A
GB1363426A GB5255770A GB5255770A GB1363426A GB 1363426 A GB1363426 A GB 1363426A GB 5255770 A GB5255770 A GB 5255770A GB 5255770 A GB5255770 A GB 5255770A GB 1363426 A GB1363426 A GB 1363426A
Authority
GB
United Kingdom
Prior art keywords
blades
piston
rotor
pitch
bias
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
GB5255770A
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.)
Dowty Rotol Ltd
Original Assignee
Dowty Rotol 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 Rotol Ltd filed Critical Dowty Rotol Ltd
Priority to GB5255770A priority Critical patent/GB1363426A/en
Priority to US00187981A priority patent/US3792937A/en
Priority to FR7139398A priority patent/FR2112447B1/fr
Publication of GB1363426A publication Critical patent/GB1363426A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/02—Hub construction
    • B64C11/04—Blade mountings
    • B64C11/06—Blade mountings for variable-pitch blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/30—Blade pitch-changing mechanisms
    • B64C11/32—Blade pitch-changing mechanisms mechanical

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Hydraulic Motors (AREA)

Abstract

1363426 Propellers DOWTY ROTOL Ltd 11 Oct 1971 [4 Nov 1970] 52557/70 Heading B7V [Also in Division F1] The blades of a rotor are adjusted by the sliding movement of a control member in the rotor hub The hub is formed in two parts which are secured together to mount the blades and which have a space between them to allow connection of the control member to the blades. As illustrated, variable pitch aircraft propellor blades 27, 29, 30 and 32 are mounted in sockets formed by two hub parts 13 and 14 which are fastened together by bolts 15. Each blade has a pin 66 which enters a socket in an axially movable piston 64 so that movement of the piston alters the blade pitch. A spring 71 and Belville washers 72 bias the piston to its Fig. 1 position in which the blades are fully feathered. Admission of pressure fluid through a pipe 59 moves the piston against the spring bias to decrease the coarseness of the blade pitch. In the extreme position in which surfaces 81 and 82 are in contact, the blades are in their reverse pitch range. The piston 64 is of square section and is prevented from rotating about its axis by slide blocks 67 and slide buttons 69. Fly-weights 48 are attached to the blades by U-bolts 49 and act to oppose centrifugal twisting moments in the blades and to bias the blades in the pitch coarsening direction. In alternative applications, the blades may be of variable twist or variable camber, or the rotor may be a propeller for an air cushion vehicle or a ship, or may be a fan or the rotor of a ram-air turbine.
GB5255770A 1970-11-04 1970-11-04 Bladed rotors Expired GB1363426A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB5255770A GB1363426A (en) 1970-11-04 1970-11-04 Bladed rotors
US00187981A US3792937A (en) 1970-11-04 1971-10-12 Bladed rotors
FR7139398A FR2112447B1 (en) 1970-11-04 1971-11-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5255770A GB1363426A (en) 1970-11-04 1970-11-04 Bladed rotors

Publications (1)

Publication Number Publication Date
GB1363426A true GB1363426A (en) 1974-08-14

Family

ID=10464371

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5255770A Expired GB1363426A (en) 1970-11-04 1970-11-04 Bladed rotors

Country Status (3)

Country Link
US (1) US3792937A (en)
FR (1) FR2112447B1 (en)
GB (1) GB1363426A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140096A (en) * 1983-05-13 1984-11-21 Wilfred Thomas Bellew Marine propeller pitch control system

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4037986A (en) * 1975-09-04 1977-07-26 Dowty Rotol Limited Bladed rotors having control means for effecting blade pitch adjustment
US4221541A (en) * 1977-02-28 1980-09-09 Axial International Aktiengesellschaft Fan comprising a blade pitch control mechanism
US4428716A (en) 1977-06-10 1984-01-31 Maloof Ralph P Variable pitch propeller hub with fluid motor actuating means
US4362467A (en) * 1979-02-08 1982-12-07 Elliott Morris C Variable pitch propeller device
US4365937A (en) * 1979-11-26 1982-12-28 Hiebert Harold L Adjustable pitch propeller drive
JPS57140291A (en) * 1981-02-23 1982-08-30 Kawasaki Heavy Ind Ltd Variable pitch impeller
GB2140508B (en) * 1983-05-25 1987-01-07 Howden James & Co Ltd Wind turbines
US5159620A (en) * 1990-09-28 1992-10-27 Thomas Bordelon Variable pitch propeller apparatus
EP0945626B1 (en) * 1998-03-26 2004-12-08 Hägele GmbH A fan, in particular for a cooling system of combustion engines
US6439850B1 (en) 1998-07-15 2002-08-27 Flexxaire Manufacturing Inc. Variable pitch fan
DE19903550C1 (en) * 1999-01-29 2000-05-25 Muehlbauer Luftfahrttechn Gmbh Blade root for propeller and rotor blades
US7214035B2 (en) * 2005-02-18 2007-05-08 Mario Bussières Rotor for a turbomachine
US20090016896A1 (en) * 2007-05-25 2009-01-15 Hill Daryl G Conical washer system for propeller stabilization
SE533034C2 (en) * 2008-09-17 2010-06-15 Berg Propulsion Technology Propeller
US9863250B2 (en) * 2010-02-24 2018-01-09 United Technologies Corporation Fastener aperture having an elongated geometry
FR2957986B1 (en) * 2010-03-29 2012-04-20 Snecma DEVICE FOR FLAGING BLOWER BLADES OF A TURBOPROPULSEUR
CN117307330A (en) * 2022-06-17 2023-12-29 通用电气公司 Rotating airfoil with spring damping system
FR3157353A1 (en) * 2023-12-26 2025-06-27 Safran Helicopter Engines HYBRID ELECTRIC PROPELLER ASSEMBLY FOR AIRCRAFT

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL283406A (en) *
DE666385C (en) * 1936-10-14 1938-10-18 Karlstad Mekaniska Ab Hub with blades for water turbines, pumps or propellers that can be rotated during operation
US2255920A (en) * 1937-02-01 1941-09-16 Englesson John Elov Ship propeller having rotatable blades
US2612229A (en) * 1945-03-06 1952-09-30 Tornes Ferdinand Variable pitch propeller blade root construction
US3103978A (en) * 1960-09-24 1963-09-17 Slack & Parr Marine Ltd Variable pitch marine screw propellers
US3393748A (en) * 1966-07-22 1968-07-23 United Aircraft Corp Propeller with spring actuated variable pitch
SE303242B (en) * 1967-01-09 1968-08-19 Saab Scania Ab
NO120011B (en) * 1967-03-22 1970-08-10 Karlstad Mekaniska Ab
US3393749A (en) * 1967-08-25 1968-07-23 Feroy Arne Controllable pitch propellers
GB1267371A (en) * 1968-07-08 1972-03-15 Dowty Rotol Ltd Variable-pitch bladed rotors
US3645644A (en) * 1970-01-22 1972-02-29 Hydro Drive Corp Interlocking variable-pitch propeller assembly
US3676016A (en) * 1970-09-21 1972-07-11 Arne Feroy Controllable pitch propellers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140096A (en) * 1983-05-13 1984-11-21 Wilfred Thomas Bellew Marine propeller pitch control system

Also Published As

Publication number Publication date
US3792937A (en) 1974-02-19
FR2112447B1 (en) 1974-09-27
FR2112447A1 (en) 1972-06-16

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Legal Events

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