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GB2260821B - Pitch change system - Google Patents

Pitch change system

Info

Publication number
GB2260821B
GB2260821B GB9222011A GB9222011A GB2260821B GB 2260821 B GB2260821 B GB 2260821B GB 9222011 A GB9222011 A GB 9222011A GB 9222011 A GB9222011 A GB 9222011A GB 2260821 B GB2260821 B GB 2260821B
Authority
GB
United Kingdom
Prior art keywords
change system
pitch change
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 - Fee Related
Application number
GB9222011A
Other versions
GB9222011D0 (en
GB2260821A (en
Inventor
William J Bagge
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.)
RTX Corp
Original Assignee
United Technologies 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 Technologies Corp filed Critical United Technologies Corp
Publication of GB9222011D0 publication Critical patent/GB9222011D0/en
Publication of GB2260821A publication Critical patent/GB2260821A/en
Application granted granted Critical
Publication of GB2260821B publication Critical patent/GB2260821B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B64C11/30—Blade pitch-changing mechanisms
    • B64C11/301—Blade pitch-changing mechanisms characterised by blade position indicating means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/22—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/2208—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils
    • G01D5/2216—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils by a movable ferromagnetic element, e.g. a core
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/22—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/2291—Linear or rotary variable differential transformers (LVDTs/RVDTs) having a single primary coil and two secondary coils

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Servomotors (AREA)
  • Control Of Turbines (AREA)
GB9222011A 1991-10-25 1992-10-20 Pitch change system Expired - Fee Related GB2260821B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78329691A 1991-10-25 1991-10-25

Publications (3)

Publication Number Publication Date
GB9222011D0 GB9222011D0 (en) 1992-12-02
GB2260821A GB2260821A (en) 1993-04-28
GB2260821B true GB2260821B (en) 1995-01-04

Family

ID=25128786

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9222011A Expired - Fee Related GB2260821B (en) 1991-10-25 1992-10-20 Pitch change system

Country Status (2)

Country Link
FR (1) FR2689853B1 (en)
GB (1) GB2260821B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5925951A (en) 1998-06-19 1999-07-20 Sundstrand Fluid Handling Corporation Electromagnetic shield for an electric motor

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2099242C1 (en) * 1996-10-17 1997-12-20 Йелстаун Корпорейшн Н.В. Variable-pitch propeller and method of measurement of angular position of its blades
RU2101212C1 (en) * 1996-10-17 1998-01-10 Йелстаун Корпорейшн Н.В. Coaxial reversible screw fan control system
US6059528A (en) * 1996-11-22 2000-05-09 United Technologies Corporation Electronic propeller control system
US5955880A (en) * 1996-12-05 1999-09-21 Beam; Palmer H. Sealless pump rotor position and bearing monitor
US6422816B1 (en) * 2001-05-21 2002-07-23 Hamilton Sundstrand Corporation Variable pitch propeller control system
US9086076B2 (en) 2009-12-18 2015-07-21 Flexxaire Inc. Variable pitch fan having a pitch sensor
GB201007564D0 (en) 2010-05-06 2010-06-23 Rolls Royce Plc Back-up featherer
GB201007567D0 (en) 2010-05-06 2010-06-23 Rolls Royce Plc BAck-up featherer
GB201007565D0 (en) 2010-05-06 2010-06-23 Rolls Royce Plc Pitch control mechanism
GB201007569D0 (en) 2010-05-06 2010-06-23 Rolls Royce Plc Pitch control mechanism
EP2715152B1 (en) * 2011-06-01 2016-11-30 Schaeffler Technologies AG & Co. KG Piston-cylinder arrangement with a travel-measuring sensor
FR2995359B1 (en) * 2012-09-10 2017-12-08 Snecma TURBOMACHINE, SUCH AS A TURBOJET OR AIRCRAFT TURBOPROPULSER
ES2723796T3 (en) * 2013-03-13 2019-09-02 Howden Axial Fans Aps Rotating hydraulic joint with displacement probe mounted on the central line, system for measuring the displacement of the variable pitch axial fan regulation system and its method
WO2015052459A1 (en) * 2013-10-07 2015-04-16 Ge Aviation Systems Limited Pitch control assembly
FR3028835B1 (en) * 2014-11-25 2016-11-25 Snecma INSTRUMENT ACTUATING DEVICE FOR AN AIRCRAFT TURBOMACHINE
CN104748661B (en) * 2015-04-17 2018-02-23 兰州理工大学 Differential transformer displacement transducer
CN105423889B (en) * 2015-12-24 2018-12-07 珠海格力电器股份有限公司 Axial displacement detection method and device of rotating shaft and magnetic suspension bearing system
GB2548085B (en) 2016-02-29 2019-12-25 Ge Aviation Systems Llc A system and method for coordinating a propeller with an electronic engine control
EP3354562A1 (en) * 2017-01-30 2018-08-01 Ge Avio S.r.l. Transfer bearing collapsing device
US10577078B2 (en) 2017-04-24 2020-03-03 General Electric Company Systems and methods for electronic measurement of propeller blade angle
US10998116B2 (en) * 2018-02-23 2021-05-04 Hamilton Sundstrand Corporation VDT with high permeability shield
US10864980B2 (en) * 2018-07-10 2020-12-15 Pratt & Whitney Canada Corp. System and method for feathering an aircraft propeller
US12018768B2 (en) 2021-12-17 2024-06-25 Hamilton Sundstrand Corporation Dual range position sensing configurations for variable differential transformers
EP4617169A1 (en) * 2024-03-13 2025-09-17 Ratier-Figeac SAS Electronically piloted low pitch stop protection
EP4628403A1 (en) * 2024-04-04 2025-10-08 Ratier-Figeac SAS Sensing system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413245A (en) * 1979-04-07 1983-11-01 Mannesmann Rexroth Gmbh Inductive measuring transducer for a fluidic adjusting member
GB2123150A (en) * 1979-07-30 1984-01-25 Goodyear Aerospace Corp Electromagnetic tyre pressure communicating devices
US4510474A (en) * 1981-07-11 1985-04-09 Robert Bosch Gmbh Inductive pickup for fluid control element
US4543732A (en) * 1984-01-20 1985-10-01 Acer Automation Company Automatic nulling LVDT probe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2370167A (en) * 1942-01-16 1945-02-27 Engineering & Res Corp Indicator for variable pitch propellers
IT7829915A0 (en) * 1977-12-29 1978-11-17 Metacon Ag APPARATUS FOR THE CONTROL OF HYDRAULIC CYLINDER AND PISTON ACTUATOR SYSTEMS.
FR2619904B1 (en) * 1987-08-28 1989-12-01 Merlin Gerin POSITION SENSOR WITHOUT MECHANICAL CONTACT
US4948337A (en) * 1989-05-01 1990-08-14 United Technologies Corporation Aircraft engine propulsor blade pitch sensing
GB9108313D0 (en) * 1991-04-18 1991-06-05 Dowty Aerospace Gloucester A variable pitch propeller assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413245A (en) * 1979-04-07 1983-11-01 Mannesmann Rexroth Gmbh Inductive measuring transducer for a fluidic adjusting member
GB2123150A (en) * 1979-07-30 1984-01-25 Goodyear Aerospace Corp Electromagnetic tyre pressure communicating devices
US4510474A (en) * 1981-07-11 1985-04-09 Robert Bosch Gmbh Inductive pickup for fluid control element
US4543732A (en) * 1984-01-20 1985-10-01 Acer Automation Company Automatic nulling LVDT probe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5925951A (en) 1998-06-19 1999-07-20 Sundstrand Fluid Handling Corporation Electromagnetic shield for an electric motor

Also Published As

Publication number Publication date
FR2689853A1 (en) 1993-10-15
GB9222011D0 (en) 1992-12-02
FR2689853B1 (en) 1994-08-26
GB2260821A (en) 1993-04-28

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Legal Events

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

Effective date: 19961020