GB1374756A – Fluid pressure servo system
– Google Patents
GB1374756A – Fluid pressure servo system
– Google Patents
Fluid pressure servo system
Info
Publication number
GB1374756A
GB1374756A
GB3394270A
GB3394270A
GB1374756A
GB 1374756 A
GB1374756 A
GB 1374756A
GB 3394270 A
GB3394270 A
GB 3394270A
GB 3394270 A
GB3394270 A
GB 3394270A
GB 1374756 A
GB1374756 A
GB 1374756A
Authority
GB
United Kingdom
Prior art keywords
potentiometer
spool
pitch
shifts
fluid pressure
Prior art date
1971-10-13
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
GB3394270A
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.)
Hawker Siddeley Dynamics Ltd
Original Assignee
Hawker Siddeley Dynamics 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.)
1971-10-13
Filing date
1971-10-13
Publication date
1974-11-20
1971-10-13
Application filed by Hawker Siddeley Dynamics Ltd
filed
Critical
Hawker Siddeley Dynamics Ltd
1971-10-13
Priority to GB3394270A
priority
Critical
patent/GB1374756A/en
1974-11-20
Publication of GB1374756A
publication
Critical
patent/GB1374756A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
239000012530
fluid
Substances
0.000
title
1
Classifications
B—PERFORMING OPERATIONS; TRANSPORTING
B64—AIRCRAFT; AVIATION; COSMONAUTICS
B64C—AEROPLANES; HELICOPTERS
B64C27/00—Rotorcraft; Rotors peculiar thereto
B64C27/32—Rotors
B—PERFORMING OPERATIONS; TRANSPORTING
B60—VEHICLES IN GENERAL
B60V—AIR-CUSHION VEHICLES
B60V1/00—Air-cushion
B60V1/14—Propulsion; Control thereof
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
F03D—WIND MOTORS
F03D7/00—Controlling wind motors
F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
F03D7/022—Adjusting aerodynamic properties of the blades
F03D7/0224—Adjusting blade pitch
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
F05B2260/00—Function
F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
F05B2260/74—Adjusting of angle of incidence or attack of rotating blades by turning around an axis perpendicular the rotor centre line
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
Y02E10/00—Energy generation through renewable energy sources
Y02E10/70—Wind energy
Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
1374756 Variable pitch propellers HAWKER SIDDELEY DYNAMICS Ltd 13 Oct 1971 [13 July 1970] 33942/70 Heading B7V [Also in Division G3] In a propeller pitch control system, an input signal applied to potentiometer 1 varies the control pressure applied at G to pilot spool 10 whereby the latter shifts to establish a pressure differential via E, F across pitch-control piston 4 which then shifts in the same direction as potentiometer 1 until the pilot spool is returned to its null position by potentiometer 2 which accompanies the piston and adjusts the feedback pressure applied at H to the spool. Each potentiometer may consist of a plunger having helical or axial grooves intermediate supply port B, C and drain ports K, L.
GB3394270A
1971-10-13
1971-10-13
Fluid pressure servo system
Expired
GB1374756A
(en)
Priority Applications (1)
Application Number
Priority Date
Filing Date
Title
GB3394270A
GB1374756A
(en)
1971-10-13
1971-10-13
Fluid pressure servo system
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB3394270A
GB1374756A
(en)
1971-10-13
1971-10-13
Fluid pressure servo system
Publications (1)
Publication Number
Publication Date
GB1374756A
true
GB1374756A
(en)
1974-11-20
Family
ID=10359371
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3394270A
Expired
GB1374756A
(en)
1971-10-13
1971-10-13
Fluid pressure servo system
Country Status (1)
Country
Link
GB
(1)
GB1374756A
(en)
Cited By (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2396496A1
(en)
*
1977-07-09
1979-02-02
Bosch Gmbh Robert
DEVICE FOR THE REGULATION OF A LIFT ON AN AGRICULTURAL TRACTOR
EP0004354A1
(en)
*
1978-03-17
1979-10-03
Mannesmann Rexroth GmbH
Hydraulic positioning device with a feedback arrangement
FR2478217A1
(en)
*
1980-03-17
1981-09-18
United Technologies Corp
SYSTEM FOR CONTROLLING THE PAST OF WIND TURBINE BLADES
FR2528916A1
(en)
*
1982-06-22
1983-12-23
United Technologies Corp
FLAG FLAGING SYSTEM FOR WIND TURBINES
WO2008043875A1
(en)
*
2006-10-11
2008-04-17
Gamesa Innovation & Technology, S.L.
System for rotating a wind turbine blade
US8636484B2
(en)
2009-01-09
2014-01-28
Tom M. Simmons
Bellows plungers having one or more helically extending features, pumps including such bellows plungers, and related methods
1971
1971-10-13
GB
GB3394270A
patent/GB1374756A/en
not_active
Expired
Cited By (9)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2396496A1
(en)
*
1977-07-09
1979-02-02
Bosch Gmbh Robert
DEVICE FOR THE REGULATION OF A LIFT ON AN AGRICULTURAL TRACTOR
EP0004354A1
(en)
*
1978-03-17
1979-10-03
Mannesmann Rexroth GmbH
Hydraulic positioning device with a feedback arrangement
FR2478217A1
(en)
*
1980-03-17
1981-09-18
United Technologies Corp
SYSTEM FOR CONTROLLING THE PAST OF WIND TURBINE BLADES
FR2528916A1
(en)
*
1982-06-22
1983-12-23
United Technologies Corp
FLAG FLAGING SYSTEM FOR WIND TURBINES
WO2008043875A1
(en)
*
2006-10-11
2008-04-17
Gamesa Innovation & Technology, S.L.
System for rotating a wind turbine blade
ES2327695A1
(en)
*
2006-10-11
2009-11-02
GAMESA INNOVATION & TECHNOLOGY, S.L.
System for rotating a wind turbine blade
CN101583793B
(en)
*
2006-10-11
2011-11-30
歌美飒创新技术公司
System for rotating a wind turbine blade
US8096764B2
(en)
2006-10-11
2012-01-17
Gamesa Innovation & Technology, S.L.
System for rotating a wind turbine blade
US8636484B2
(en)
2009-01-09
2014-01-28
Tom M. Simmons
Bellows plungers having one or more helically extending features, pumps including such bellows plungers, and related methods
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Legal Events
Date
Code
Title
Description
1975-04-03
PS
Patent sealed
1980-05-29
PCNP
Patent ceased through non-payment of renewal fee
