EP0075211A2 - Soupape de réglage en particulier pour la commande et la régulation de turbines à vapeur - Google Patents

Soupape de réglage en particulier pour la commande et la régulation de turbines à vapeur Download PDF

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Publication number
EP0075211A2
EP0075211A2 EP82108333A EP82108333A EP0075211A2 EP 0075211 A2 EP0075211 A2 EP 0075211A2 EP 82108333 A EP82108333 A EP 82108333A EP 82108333 A EP82108333 A EP 82108333A EP 0075211 A2 EP0075211 A2 EP 0075211A2
Authority
EP
European Patent Office
Prior art keywords
diffuser
valve
convergent
channel part
control valve
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.)
Ceased
Application number
EP82108333A
Other languages
German (de)
English (en)
Other versions
EP0075211A3 (fr
Inventor
Otto Dipl.-Ing. Von Schwerdtner
Hans Dipl.-Ing. Judith
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.)
Kraftwerk Union AG
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 EP0075211A2 publication Critical patent/EP0075211A2/fr
Publication of EP0075211A3 publication Critical patent/EP0075211A3/fr
Ceased legal-status Critical Current

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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
    • F01D17/10—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

Definitions

  • the invention relates to a control valve, in particular for controlling and regulating steam turbines, according to the preamble of patent claim 1.
  • control valves which are known, for example, from Siemens magazine 41 (1967), supplement “Steam turbines of great output", pages 75 and 76, are intended, on the one hand, to ensure a desired throttle characteristic by changing the stroke position of the valve body and, on the other hand, in a fully open, ie. H. cause the lowest possible gradient losses when driven.
  • the adjustment forces should be kept small with regard to the limits of the dimensions and the performance of the associated actuators. In the single-seat valves mostly used in steam turbine construction, the adjusting forces are reduced by the selection of a relatively small diameter of the valve body. In the narrowest cross section behind the valve seat, high flow velocities result even when the control valve is fully open.
  • valve body If the flow is throttled for control purposes and the For this purpose, the valve body is displaced in the direction of the valve seat, so flow separations occur in the diffuser with increasing closing movement of the valve body.
  • the overspeed of the flow is slowed down by swirling.
  • supersonic velocities of the flow behind the valve seat are increasingly generated, which are reduced by compression surges.
  • both forms of flow slowdown or loss generation by swirling or by compression shocks cause a highly unsteady flow with pronounced coarse turbulence, with pulsation and with back and forth swaying of the flow which initially runs behind the valve seat as a free jet.
  • the pressure fluctuations generated in this way then act as undesirable vibration excitation on the valve body.
  • the invention is therefore based on the object of providing a control valve in which the alternating forces which excite the valve body to vibrate are minimized.
  • the invention is based on the knowledge that a Stabilization of the flow on the diffuser wall can be achieved if the acceleration of the flow at the throttle point between the valve body and the valve seat has a dominant effect in the axial direction and the radial component of the acceleration remains as small as possible. It was also found that such an influencing of the acceleration in the sense of a large axial component and a small radial component can be realized in that the convergent channel part has the contour of a circular truncated cone and merges into the adjoining channel part without a sharp edge but with a curvature.
  • the desired effect ie a noticeable stabilization of the flow
  • cone angle of the circular truncated cone is 65 ° or less.
  • cone angles of 60 ° or less are preferably selected, as a result of which a particularly efficient stabilization of the flow is achieved.
  • the aerodynamically favorable shape of the control valve according to the invention can be further improved in that the inner wall of the valve housing merges into the frustoconical contour without steps and edges in the inlet region of the convergent duct part.
  • a steady transition in the mathematical sense is not necessary.
  • the truncated cone-shaped convergent channel part merges with the curvature into the adjoining channel part. It is provided in a first preferred embodiment that the convergent channel part with the curvature passes directly into the divergent channel part of the diffuser. According to a second preferred embodiment, it is also possible for the convergent channel part with the curvature merges into a cylindrical channel part, which is followed by the divergent channel part of the diffuser. The cylindrical channel part acts on the flow as an additional calming zone and also increases the distance between the diffuser, which is particularly critical in terms of instabilities, and the valve body.
  • the cross-sectional profile of the control valve can be interpreted as a convergent-divergent channel, the valve seat 4 in the convergent channel part 6 being in front of the narrowest cross-section f and the divergent channel part being formed by the diffuser 5.
  • the Contour of the convergent-divergent channel in the area of the valve seat 4, the narrowest cross-section f and the initial area of the divergent channel part or diffuser 5 is formed by a valve seat bushing 7 made of wear-resistant material and inserted into the valve housing 1.
  • the valve body 3 is designed as a piston and is guided in the axial direction within a valve guide 8, which is designed as a cylinder and is fixedly arranged in the valve housing 1.
  • the stroke position of the valve body 3, which determines the throttling of the steam flow S, is set in the direction of the longitudinal axis L of the valve housing 1 via a valve spindle 9 which is positively connected to the valve body 3 by an actuator not shown in the drawing.
  • the convergent channel part 6 has the contour of a circular truncated cone, which is defined by the dash-dotted cone surface line KM and the cone angle 2a. This cone angle 2a is 60 0 in the exemplary embodiment shown. Upstream, the frustoconical contour of the convergent channel part 6 merges into the inner wall of the valve housing 1 without steps or edges, while downstream it merges into the divergent channel part of the diffuser 5 with a curvature 10.
  • FIG. 3 shows a variant in the cross-sectional profile of the convergent-divergent channel.
  • the frustoconical contour of the convergent duct part 6 merges with a curvature 10 'into a cylindrical duct part 11, to which the divergent duct part of a diffuser 5' then directly, ie without further curvature closes.
  • the valve seat bushing, which forms the contour of the cylindrical channel part, is designated 7 'in this variant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lift Valve (AREA)
  • Control Of Turbines (AREA)
  • Details Of Valves (AREA)
EP82108333A 1981-09-22 1982-09-09 Soupape de réglage en particulier pour la commande et la régulation de turbines à vapeur Ceased EP0075211A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813137720 DE3137720A1 (de) 1981-09-22 1981-09-22 Stellventil, insbesondere zur steuerung und regelungvon dampfturbinen
DE3137720 1981-09-22

Publications (2)

Publication Number Publication Date
EP0075211A2 true EP0075211A2 (fr) 1983-03-30
EP0075211A3 EP0075211A3 (fr) 1983-07-20

Family

ID=6142343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82108333A Ceased EP0075211A3 (fr) 1981-09-22 1982-09-09 Soupape de réglage en particulier pour la commande et la régulation de turbines à vapeur

Country Status (3)

Country Link
EP (1) EP0075211A3 (fr)
JP (1) JPS5865904A (fr)
DE (1) DE3137720A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0200509A1 (fr) * 1985-04-25 1986-11-05 Westinghouse Electric Corporation Clapet pour la soupape de régulation d'une turbine à vapeur
RU2183780C1 (ru) * 2001-01-05 2002-06-20 Закрытое акционерное общество "ЭНТЭК" Регулирующий клапан

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4328626A1 (de) * 1993-08-27 1995-03-02 Motan Verfahrenstechnik Verfahren zum Betrieb einer Förderleitung mit Dichtstromförderung und Vorrichtung zur Ausübung des Verfahrens
NO334212B1 (no) * 2005-08-23 2014-01-13 Typhonix As Anordning ved reguleringsventil
RU2415323C1 (ru) * 2009-08-21 2011-03-27 Общество с ограниченной ответственностью "Комтек-Энергосервис" (ООО "Комтек-Энергосервис") Регулирующий клапан паровой турбины
DE102010024342B4 (de) * 2010-06-18 2014-10-23 Siemens Aktiengesellschaft Stellventil für eine Dampfturbine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB560793A (en) * 1941-11-04 1944-04-20 Bendix Aviat Corp Improvements in or relating to valves
US2561214A (en) * 1950-07-26 1951-07-17 Gen Electric Combination balanced shutoff and throttling valve assembly
DE1425730A1 (de) * 1963-06-20 1968-12-12 Zikesch Dipl Ing Herbert Ablaufventil
FR1508901A (fr) * 1966-02-09 1968-03-20
CH474702A (de) * 1967-05-23 1969-06-30 Sulzer Ag Ventil
CH632816A5 (en) * 1978-07-07 1982-10-29 Bbc Brown Boveri & Cie Control (regulating) valve, in particular for high-pressure steam
DE2944670C2 (de) * 1979-11-06 1982-11-25 Industrie- und Pipeline-Service Gerhard Kopp GmbH, 4450 Lingen Hochdruck-Absperrventil
DE2948639C2 (de) * 1979-12-04 1981-12-03 C.H. Zikesch GmbH, 4230 Wesel Absperr- und Regelventil
US4337788A (en) * 1981-02-02 1982-07-06 Smith International Inc. High pressure valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0200509A1 (fr) * 1985-04-25 1986-11-05 Westinghouse Electric Corporation Clapet pour la soupape de régulation d'une turbine à vapeur
RU2183780C1 (ru) * 2001-01-05 2002-06-20 Закрытое акционерное общество "ЭНТЭК" Регулирующий клапан

Also Published As

Publication number Publication date
JPS5865904A (ja) 1983-04-19
DE3137720A1 (de) 1983-04-07
EP0075211A3 (fr) 1983-07-20

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Effective date: 19850509

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Inventor name: JUDITH, HANS, DIPL.-ING.

Inventor name: VON SCHWERDTNER, OTTO, DIPL.-ING.