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GB1460944A - Control valve unit including a hydraulic servo motor - Google Patents

Control valve unit including a hydraulic servo motor

Info

Publication number
GB1460944A
GB1460944A GB1764774A GB1764774A GB1460944A GB 1460944 A GB1460944 A GB 1460944A GB 1764774 A GB1764774 A GB 1764774A GB 1764774 A GB1764774 A GB 1764774A GB 1460944 A GB1460944 A GB 1460944A
Authority
GB
United Kingdom
Prior art keywords
valve
signal
regulator
servomotor
controlled
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
GB1764774A
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.)
ABB Stal AB
Original Assignee
Stal Laval Turbin AB
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 Stal Laval Turbin AB filed Critical Stal Laval Turbin AB
Publication of GB1460944A publication Critical patent/GB1460944A/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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
    • F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
    • F01D17/26—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical fluid, e.g. hydraulic
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
    • F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
  • Control Of Water Turbines (AREA)

Abstract

1460944 Controlling servomotors STALLAVAL TURBIN AB 23 April 1974 [24 April 1973] 17647/74 Heading G3P A control valve unit 9 for an hydraulic servomotor 7 operating the main control valve 3 of a turbine 2, which valve unit is intended to control the flow of fluid to and from the servomotor for opening and closing the valve, characterized in that the unit comprises a first valve 13 Fig. 2 connected between the fluid source 8 and exhaust 17, and the servomotor, and controlled from a turbine regulator 10 for normal operation and a second valve 14 for rapid closing of valve 3, valve 14 being connected between servo 7 and exhaust 18 and being controlled by a signal 15. In operation, a pump 8 supplies hydraulic fluid to valve 13 which is controlled by regulator 10 transmitting analogue signals to the valve. A signal is also transmitted to valve 14 from regulator 10 through a threshold valve emitter 16 and OR-gate 15, and from a safety and alarm device 25. If there is a major or partial drop-out of load on the turbine driven generator network 5 the signal from system 10 to valve 13 is also connected through OR-gate 15 so that a signal greater than threshold value m actuates valve 14 and valve 3 is rapidly closed temporarily, until the signal falls below the level m. If there is a total drop-out of load, device 25 actuates valve 14 to close valve 3. In a modification, valve 13 is split into two valves (19), (20) Figs. 3, 4 (not shown) throttling means (21), (22) or constant flow valves (23), (24) being provided.
GB1764774A 1973-04-24 1974-04-23 Control valve unit including a hydraulic servo motor Expired GB1460944A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7305708A SE372054B (en) 1973-04-24 1973-04-24

Publications (1)

Publication Number Publication Date
GB1460944A true GB1460944A (en) 1977-01-06

Family

ID=20317271

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1764774A Expired GB1460944A (en) 1973-04-24 1974-04-23 Control valve unit including a hydraulic servo motor

Country Status (4)

Country Link
JP (1) JPS5012403A (en)
DE (1) DE2417666B2 (en)
GB (1) GB1460944A (en)
SE (1) SE372054B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3024559C2 (en) * 1980-06-28 1984-02-02 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Adjusting device for a shut-off valve
DE3049348C2 (en) * 1980-12-29 1985-10-31 Kraftwerk Union AG, 4330 Mülheim Electro-hydraulic actuator for turbine valves
JPS61116107A (en) * 1984-11-09 1986-06-03 Hitachi Ltd Actuator control device

Also Published As

Publication number Publication date
SE372054B (en) 1974-12-09
JPS5012403A (en) 1975-02-08
DE2417666B2 (en) 1979-02-22
DE2417666A1 (en) 1975-01-30

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Legal Events

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