GB1279101A - Bladed rotors - Google Patents

Bladed rotors

Info

Publication number
GB1279101A
GB1279101A GB3425869A GB3425869A GB1279101A GB 1279101 A GB1279101 A GB 1279101A GB 3425869 A GB3425869 A GB 3425869A GB 3425869 A GB3425869 A GB 3425869A GB 1279101 A GB1279101 A GB 1279101A
Authority
GB
United Kingdom
Prior art keywords
plate
pitch
blades
spring
angularly
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
GB3425869A
Inventor
Kenneth Raymond Boydell
Peter Farr
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 Technical Developments Ltd
Original Assignee
Dowty Technical Developments 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 Technical Developments Ltd filed Critical Dowty Technical Developments Ltd
Priority to GB3425869A priority Critical patent/GB1279101A/en
Publication of GB1279101A publication Critical patent/GB1279101A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C11/00Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/30Blade pitch-changing mechanisms
    • B64C11/38Blade pitch-changing mechanisms fluid, e.g. hydraulic
    • B64C11/40Blade pitch-changing mechanisms fluid, e.g. hydraulic automatic

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Hydraulic Motors (AREA)

Abstract

1279101 Variable pitch propellers DOWTY TECHNICAL DEVELOPMENTS Ltd 1 July 1970 [8 July 1969] 34258/69 Heading B7V [Also in Division F1] In an aircraft propeller the blades 27 mounted in a hub of a rotor are angularly adjustable for pitch, twist or camber about their longitudinal axes 35 by a fluid-pressure-operable motor having an element or plate 44 movable linearly and angularly with respect to the hub and being coupled to each blade by a respective link 67 having a pivotal connection at one end portion and a universal connection at the other end portion. The plate 44 has a cylindrical member 46 extending forwardly through an aperture, including a fluid seal 37, into a domed cylindrical casing 40, and a rearwardly extending cylindrical member 48 sealingly connected to a tube 50. Fluid under pressure is delivered under the control of a manually operated valve (not shown) through the tube 50 to cause displacement of the plate 44 to the right so that the links 67 pivotally connected thereto angularly adjust the blades 27 about their longitudinal axes 35. The movement of the plate 44 towards the right, i.e. the pitch-fining direction, is performed against a spring 56 and also against the effort of balancing weights 65 which bias the blades in the pitch-coarsening direction. The spring 56 bears at the other end against an annular flange member 52 which is free to move angularly with respect to the hub by means of a roller bearing 53. An auxiliary spring 59, stronger than the spring 56 also seats against the member 52 and encounters the plate 44 when the blades 27 move into a reverse pitch position and a sleeve 62 limits the extent of rearward movement of the member 44. The fluid motor may alternatively be double acting and may also be of the movable cylinder type.
GB3425869A 1969-07-08 1969-07-08 Bladed rotors Expired GB1279101A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3425869A GB1279101A (en) 1969-07-08 1969-07-08 Bladed rotors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3425869A GB1279101A (en) 1969-07-08 1969-07-08 Bladed rotors

Publications (1)

Publication Number Publication Date
GB1279101A true GB1279101A (en) 1972-06-28

Family

ID=10363400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3425869A Expired GB1279101A (en) 1969-07-08 1969-07-08 Bladed rotors

Country Status (1)

Country Link
GB (1) GB1279101A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2613225A1 (en) * 1976-03-27 1977-09-29 Schaffran Propeller Lehne & Co ADJUSTMENT DEVICE FOR MARINE PROPELLERS, PROPELLER PUMPS AND PROPELLER TURBINES
GB2209806A (en) * 1987-08-28 1989-05-24 Taylor Woodrow Const Ltd Blade pitch change mechanism
WO2018165882A1 (en) * 2017-03-15 2018-09-20 SZ DJI Technology Co., Ltd. Automatically and releasably coupling uav propellers to propulsion motors, and associated systems and methods

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2613225A1 (en) * 1976-03-27 1977-09-29 Schaffran Propeller Lehne & Co ADJUSTMENT DEVICE FOR MARINE PROPELLERS, PROPELLER PUMPS AND PROPELLER TURBINES
GB2209806A (en) * 1987-08-28 1989-05-24 Taylor Woodrow Const Ltd Blade pitch change mechanism
WO2018165882A1 (en) * 2017-03-15 2018-09-20 SZ DJI Technology Co., Ltd. Automatically and releasably coupling uav propellers to propulsion motors, and associated systems and methods

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed