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1. WO2000043641 - DISK VIBRATION REDUCER FOR COMBINED CONTROL AND STOP STEAM VALVE

Publication Number WO/2000/043641
Publication Date 27.07.2000
International Application No. PCT/US2000/001802
International Filing Date 24.01.2000
IPC
F01D 17/14 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
DNON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
17Regulating or controlling by varying flow
10Final actuators
12arranged in stator parts
14varying effective cross-sectional area of nozzles or guide conduits
F16K 1/44 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
1Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
32Details
34Cutting-off parts
44Details of seats or valve members of double-seat valves
F16K 47/08 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
47Means in valves for absorbing fluid energy
08for decreasing pressure and having a throttling member separate from the closure member
CPC
F01D 17/145
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
17Regulating or controlling by varying flow
10Final actuators
12arranged in stator parts
14varying effective cross-sectional area of nozzles or guide conduits
141by means of shiftable members or valves obturating part of the flow path
145by means of valves, e.g. for steam turbines
F16K 1/44
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
1Lift valves ; or globe valves; , i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
32Details
34Cutting-off parts, e.g. valve members, seats
44Details of seats or valve members of double-seat valves
F16K 47/08
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
47Means in valves for absorbing fluid energy ; , e.g. cushioning of opening or closure movement, eliminating of vibrations of the valve member
08for decreasing pressure ; or noise level; and having a throttling member separate from the closure member ; , e.g. screens, slots, labyrinths
Y10T 137/0318
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
0318Processes
Y10T 137/87121
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
8593Systems
87096Valves with separate, correlated, actuators
87121Coaxial stems
Y10T 137/88046
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
8593Systems
87917Flow path with serial valves and/or closures
88046Biased valve with external operator
Applicants
  • GENERAL ELECTRIC COMPANY [US/US]; 1 River Road Schenectady, NY 12345, US
Inventors
  • STEENBURGH, John, Howard; US
Agents
  • STECKLER, Henry, I. ; General Electric Company 3135 Easton Turnpike W3C Fairfield, CT 06431, US
Priority Data
09/236,73325.01.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DISK VIBRATION REDUCER FOR COMBINED CONTROL AND STOP STEAM VALVE
(FR) REDUCTEUR DES VIBRATIONS DU DISQUE DE VANNE POUR VANNE COMBINEE DE CONTROLE ET D'ARRET DE LA VAPEUR
Abstract
(EN)
A steam valve (10) for a steam turbine includes a control valve head (18) having a recess (40) and a stop valve head (20) disposed within the recess (40) of the control valve head (18), both heads having sealing surfaces in opposition to a valve seat (22). The control valve head (18) is displaced by a control system in accordance with steam turbine requirements. The stop valve head (20) provides a fast-acting valve to close the steam valve in response to a turbine upset. The control system, at least during throttling operations, controls the position of the stop valve head (20) in proportion to the position of the control valve head (18) such that vortex flow past the surfaces and valve seat is minimized or eliminated and substantial laminar flow occurs across the sealing surfaces of the stop valve and control valve heads.
(FR)
Selon cette invention, une vanne de vapeur (10) pour turbine à vapeur comprend une tête de vanne de contrôle (18) munie d'un enfoncement (40) et une tête de vanne d'arrêt (20) disposée dans l'enfoncement (40) de la tête de vanne de contrôle (18), les deux têtes comportant des surfaces de scellement opposées à un siège de vanne (22). La tête de vanne de contrôle (18) est déplacée par un système de commande en fonction des besoins de la turbine à vapeur. La tête de vanne d'arrêt (20) permet de former une vanne rapide qui obture la vanne de vapeur en réponse à un dérangement de la turbine. Le système de commande, au moins lors des opérations d'étranglement, commande la position de la tête de vanne d'arrêt (20) par rapport à la position de la tête de vanne de contrôle (18), de manière à ce que le flux en tourbillon au-delà des surfaces et du siège de vanne soit réduit au minimum, voire éliminé, et qu'un flux laminaire sensible se crée sur les surfaces de scellement des têtes des vannes d'arrêt et de contrôle.
Also published as
Latest bibliographic data on file with the International Bureau