IN154942B - - Google Patents

Info

Publication number
IN154942B
IN154942B IN1366/CAL/81A IN1366CA1981A IN154942B IN 154942 B IN154942 B IN 154942B IN 1366CA1981 A IN1366CA1981 A IN 1366CA1981A IN 154942 B IN154942 B IN 154942B
Authority
IN
India
Prior art keywords
servo piston
switch
valve
error signal
deviation
Prior art date
Application number
IN1366/CAL/81A
Inventor
Wolfgang Kindermann
Original Assignee
Kraftwerk Union Ag
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 Kraftwerk Union Ag filed Critical Kraftwerk Union Ag
Publication of IN154942B publication Critical patent/IN154942B/en

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • 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
    • 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
    • F15B9/09—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 with electrical control means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/14—Automatic controllers electric in which the output signal represents a discontinuous function of the deviation from the desired value, i.e. discontinuous controllers
    • G05B11/18—Multi-step controllers
    • 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
    • Y02E10/20—Hydro energy

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Servomotors (AREA)
  • Control Of Turbines (AREA)
  • Control Of Water Turbines (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

1. Electrohydraulic adjusting drive for turbine valves, in particular for regulating valves of steam turbines, with a) a hydraulic adjusting cylinder (1), whose servo piston (2) controls the extent to which the turbine valve is opened and is loaded in the closing direction of the turbine valve by a spring (6), b) a regulating member (8), which compares an actual value signal (I) derived from the position of the servo piston (2) with a desired value signal (S) and produces a proportional error signal (F) to correspond to the deviation (x), and c) an electrohydraulic converter (10, 100) which converts the error signal (F) into a proportional fluid flow (mF1 ) to position the servo piston (2), characterised in that d) the proportionality of the fluid flow (mF1 ) consists in a small signal area with the threshold values +- xK ; in that d1) there is at least one binary through-flow switch (11, 110) hydraulically connected in parallel with the electrohydraulic converter (10, 100) and hydraulically connected with both servo piston sides, which throughflow switch is triggered by the error signal (F) via a first threshold value switch (12) which responds to the deviation when a first threshould value (+- xS1 ) is reached, when ¦xS1 ¦ > ¦xK ¦, and releases a further flow of fluid (mF2 ) for the rapid rough positioning of the servo piston (21) ; and in that d2) for rapid closing of the turbine valve there is at least one binary drainage switch (13, 130, 131, 132) which is hydraulically connected with that side of the piston which is subjected to pressure for operation for the purpose of opening the valve, which drainage switch is triggered by the error signal (F) via a second threshold value switch (14) which responds to the deviation when a second negative threshold valve (xS2 ) is reached, when - xS2 < - xS1 , and releases a further flow of fluid (mF3 ) in order to relieve the servo piston (2).
IN1366/CAL/81A 1980-12-29 1981-12-02 IN154942B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3049348A DE3049348C2 (en) 1980-12-29 1980-12-29 Electro-hydraulic actuator for turbine valves

Publications (1)

Publication Number Publication Date
IN154942B true IN154942B (en) 1984-12-22

Family

ID=6120473

Family Applications (1)

Application Number Title Priority Date Filing Date
IN1366/CAL/81A IN154942B (en) 1980-12-29 1981-12-02

Country Status (7)

Country Link
EP (1) EP0055351B1 (en)
JP (1) JPS57135204A (en)
AT (1) ATE18816T1 (en)
BR (1) BR8108401A (en)
DE (1) DE3049348C2 (en)
ES (1) ES508356A0 (en)
IN (1) IN154942B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3374356D1 (en) * 1982-03-16 1987-12-10 Buehler Ag Geb Method and device for regulating a variable, and application of the method
JPS59500491A (en) * 1982-03-16 1984-03-22 ビユ−ラ−・ア−ゲ− Method and apparatus for controlling a controlled quantity to adjust the flow rate of a flowable material
JPS59115404A (en) * 1982-12-23 1984-07-03 Toshiba Corp Controller for opening position of steam valve in steam turbine
GB8426486D0 (en) * 1984-10-19 1984-11-28 Lucas Ind Plc Electro-hydraulic actuator systems
JPH0552202A (en) * 1991-08-20 1993-03-02 Sumitomo Metal Ind Ltd Hydraulic servo device
DE19748758B4 (en) * 1997-11-05 2004-08-12 Techno Alpin Gmbh/S.R.L. Motorized actuator
EP2620655A1 (en) * 2012-01-30 2013-07-31 Siemens Aktiengesellschaft Drive system for a valve
DE102014226672B3 (en) * 2014-12-19 2015-12-24 Voith Patent Gmbh Actuator for a control valve, in particular steam turbine control valve and method for operating the same
DE102014226666B3 (en) * 2014-12-19 2015-12-24 Voith Patent Gmbh Actuator for a control valve, in particular steam turbine control valve and method for operating the same

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1428616A (en) * 1965-01-08 1966-02-18 Chantiers De Nantes Atel Improvements to remote control or potentiometric transmission devices
AT267663B (en) * 1966-05-25 1969-01-10 Inst Regelungstechnik Device, in particular for the remote transmission of measured values and commands or for analog computing devices for servomechanical conversion of an electrical signal into a path or an angular position
FI52155C (en) * 1968-01-03 1977-06-10 Ahlstroem Oy Arrangement for adjusting the position of moving machine parts.
JPS5234742B1 (en) * 1971-03-31 1977-09-05
CH545509A (en) * 1971-12-17 1974-01-31
US3953741A (en) * 1971-12-17 1976-04-27 Stata-Control System Scs Ag Stepwise control for two-step control with switching stages
SE372054B (en) * 1973-04-24 1974-12-09 Stal Laval Turbin Ab
JPS5427517A (en) * 1977-08-04 1979-03-01 Kuraray Co Ltd New polysaccharide and its preparation
DE2744941A1 (en) * 1977-10-06 1979-04-19 Schoppe & Faeser Gmbh PROCEDURE AND EQUIPMENT FOR MONITORING A POSITIONER FOR FAULTS
FR2405358A1 (en) * 1977-10-06 1979-05-04 Europ Turb Vapeur STEAM TURBINE REGULATION SYSTEM

Also Published As

Publication number Publication date
EP0055351B1 (en) 1986-03-26
JPS644044B2 (en) 1989-01-24
BR8108401A (en) 1982-10-13
DE3049348A1 (en) 1982-07-08
EP0055351A1 (en) 1982-07-07
ATE18816T1 (en) 1986-04-15
JPS57135204A (en) 1982-08-20
DE3049348C2 (en) 1985-10-31
ES8302875A1 (en) 1982-12-01
ES508356A0 (en) 1982-12-01

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