[go: up one dir, main page]

GB1408153A - Mechanism for varying the pitch of rotor blades - Google Patents

Mechanism for varying the pitch of rotor blades

Info

Publication number
GB1408153A
GB1408153A GB390372A GB390372A GB1408153A GB 1408153 A GB1408153 A GB 1408153A GB 390372 A GB390372 A GB 390372A GB 390372 A GB390372 A GB 390372A GB 1408153 A GB1408153 A GB 1408153A
Authority
GB
United Kingdom
Prior art keywords
piston
cylinder
rotor
blade
pitch
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
GB390372A
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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 Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB390372A priority Critical patent/GB1408153A/en
Publication of GB1408153A publication Critical patent/GB1408153A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

1408153 Axial-flow fans ROLLS-ROYCE (1971) Ltd 17 Jan 1973 [27 Jan 1972] 3903/72 Heading F1C A mechanism for varying the pitch of a blade of an axial-flow machine rotor is mounted to rotate with the rotor and includes a piston and cylinder which are hydraulically movable relative to one another, the piston or the cylinder being connected to means adapted to actuate a pair of cam plates having oppositely inclined cam surfaces so that movement of the piston or cylinder rotates the cam plates in opposite directions, the rotation being transmitted to means engaging the rotor blade so as to rotate the blade on its longitudinal axis, the piston and cylinder being positioned so that the piston and/or cylinder is movable under centrifugal forces to produce torque in the mechanismopposing the centrifugal twisting moment exerted on the blade during rotation of the rotor. The roots 14 of the variable-pitch fan rotor blades of a gas turbine engine are each splined to a member 15 which is journalled in the rotor disc 16 via a bearing 17 and carries a bevel pinion 18. A hydraulically actuated piston 21 within a radially extending cylinder 20 acts via rollers 32, 33, 34 and cam plates 35, 36, 37 to twin bevel gears 47, 48 in opposite directions, thereby turning the fan blades in unison via the bevel pinions 18. The centrifugal force acting on the piston 21 and tending to move it radially outwards produces a torque on each bevel pinion 18 which balances the inherent centrifugal twisting moment tending to feather the corresponding fan blade.
GB390372A 1972-01-27 1972-01-27 Mechanism for varying the pitch of rotor blades Expired GB1408153A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB390372A GB1408153A (en) 1972-01-27 1972-01-27 Mechanism for varying the pitch of rotor blades

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB390372A GB1408153A (en) 1972-01-27 1972-01-27 Mechanism for varying the pitch of rotor blades

Publications (1)

Publication Number Publication Date
GB1408153A true GB1408153A (en) 1975-10-01

Family

ID=9767044

Family Applications (1)

Application Number Title Priority Date Filing Date
GB390372A Expired GB1408153A (en) 1972-01-27 1972-01-27 Mechanism for varying the pitch of rotor blades

Country Status (1)

Country Link
GB (1) GB1408153A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4810164A (en) * 1986-12-24 1989-03-07 Rolls-Royce Plc Pitch change arrangement for a variable pitch fan

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4810164A (en) * 1986-12-24 1989-03-07 Rolls-Royce Plc Pitch change arrangement for a variable pitch fan

Similar Documents

Publication Publication Date Title
GB1259995A (en) Variable pitch propeller or rotor
GB1430596A (en) Multi-bladed fans
ES439834A1 (en) Wind turbine
GB1521545A (en) Pitch-change apparatus for a ducted thrust fan
GB1375988A (en) Pitch varying mechanism for variable pitch fan
US3367424A (en) Hydraulic machine having adjustable blade runner
GB1274226A (en) Variable-pitch bladed rotors
GB1371371A (en) Variable pitch fans or propellers particularly for gas turbine engines
GB1408153A (en) Mechanism for varying the pitch of rotor blades
GB723798A (en) Improvements in axial-flow turbines or pumps
GB1371372A (en) Variable pitch rotary blading
GB1509235A (en) Torque sensitive pitch lock for fan propulsors
GB1278825A (en) Pump, fan or turbine with variable blade rake
ES326955A1 (en) Improvements in adjustable guidelines of hydraulic turbines or pumps. (Machine-translation by Google Translate, not legally binding)
GB1406834A (en) Control valve actuating arrangements
JPS55139978A (en) Blade wheel turbine
GB1064330A (en) Vane operating mechanism for a fluid flow machine such as a gas turbine engine
ES458039A1 (en) Devices for operating variable-pitch propellers
GB1251955A (en)
GB512057A (en) Improvements in automatically controlled variable pitch air screws
GB585345A (en) Internal-combustion turbine plant
SU367283A1 (en) WORKING WHEEL OF TURNING-SPINNING HYDRAULIC MACHINE
ES204729A1 (en) Improvements in and relating to operating gear for adjustable propeller type blades in hydraulic turbines or pumps
GB1368282A (en) Bladed rotors
GB447424A (en) Improvements in or relating to variable pitch airscrews

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee