Abstract:
Ein Regel-Schnellschluss-Ventil für eine Dampfturbine weist ein Gehäuse (2) mit einer Eintrittsöffnung (3), durch die Dampf (7) in den Innenraum (11) des Gehäuses (2) einströmbar ist, und einer Austrittsöffnung (4), durch die der Dampf (7) aus dem Innenraum (11) des Gehäuses herausströmbar ist, und einen Kolben (13) auf, der in dem Gehäuse (2) angeordnet ist und an seinem Außenumfang an dem Gehäuse (2) stets dampfdicht anliegt sowie einen Durchgangskanal (14) aufweist, der in den Außenumfang mündet, wobei der Kolben (13) relativ zu dem Gehäuse (2) verschiebbar angeordnet und dadurch in eine Durchgangsstellung, in der in Abhängigkeit des Überlappungsgrads der Eintrittsöffnung (3), der Austrittsöffnung (4) und des Durchgangskanals (14) Dampf (7) von der Eintrittsöffnung (3) zu der Austrittsöffnung (4) via den Durchgangskanal (14) passierbar ist, wodurch die Regelfunktion des Regel-Schnellschluss-Ventils (1) erzielt ist, und in eine Sperrstellung bringbar ist, in der die Eintrittsöffnung (3) und/oder die Austrittsöffnung (4) von dem Außenumfang des Kolbens (13) verschlossen ist, wodurch die Schnellschlussfunktion des Regel-Schnellschluss-Ventils (1) erzielt ist.
Abstract:
An indicator device is for sensing a valve of a fluid machine including a casing having an interior chamber, a valve controlling flow into the interior chamber, and a rotatable shaft configured to displace the valve between open and closed positions when the shaft moves between first and second angular positions. A first indicator member, preferably a pinion gear, is coupled with the shaft such that angular movement of the shaft angularly displaces the first member. A second indicator member, preferably a rack gear, is coupled with the first member such that the angular displacement of the first member linearly displaces the second member. The second member linear displacement is generally proportional to angular displacement of the first member. Further, a sensor is configured to sense at least one of linear displacement and linear position of the second indicator member so as to sense the position of the valve.
Abstract:
A starter air valve assembly (200) includes a valve body (202), a flow control valve, a rate control servomechanism (208), and a valve actuator (206). The valve body (202) defines a flow passage having at least an inlet port and an outlet port. The valve (202) is disposed at least partially within the flow passage and is moveable between an open position and a closed position. The rate control servo mechanism (208) is adapted to receive pressurized fluid and is configured, upon receipt of the pressurized fluid, to supply a controlled flow of the pressurized fluid. The valve actuator (206) is coupled to the valve (202) and is in fluid communication with the rate control servo (208) to thereby receive the controlled flow of the pressurized fluid. The valve actuator (206) is configured, upon receipt of the controlled flow of the pressurized fluid, to move the valve (202) between the closed position and the open position at a substantially controlled rate.
Abstract:
According to the inventive method, excessive load changing speeds (10) are to be detected during the operation of the turbine (3). In the event of excessive load changing speeds, at least one turbine valve (15) of the turbine (3) is momentarily throttled and, after the load change, the rotational speed of the turbine (5) is subsequently regulated with regard to the new operating load. The inventive device (1) serves to carry out said method and comprises a setting unit (11) for effecting the momentary throttling of the at least one turbine valve (15), and comprises an arithmetic unit (17), which is provided for regulating the rotational speed according to a load change and by means of which at least two actuating signals (19, 21) for controlling the turbine valve (15) can be generated. The first actuating signal (19) serves to actuate the turbine valve (15) in the opening direction thereof, and the second actuating signal (21) serves to actuate the turbine valve in the closing direction thereof.
Abstract:
Die vorliegende Erfindung betrifft ein Dampfleitungsverschlußventil (14)zum Verschließen einer Dampfleitung (20), insbesondere in einer Dampfturbinenanlage (10) zwischen einer ersten Teilturbine (11) und mindestens einer zweiten Teilturbine (15), die mit geringerem Druck als die erste Teilturbine (11) betrieben wird. Erfindungsgemäß ist das Dampfleitungsverschlußventil (14) in mehrere Elemente (25a, 25b, 25c, 25d) aufgeteilt, die gemeinsam den Querschnitt der Dampfleitung (20) abdecken können. Hierdurch wird eine Verringerung des Trägheitsmoments I y der Elemente (25a, 25b, 25c, 25d) erreicht.
Abstract:
A valve seat (10) includes a seat body with an inlay and at least one groove (24). The seat body has a passage which extends from a first opening (20) to a second opening in the seat body. A channel (22) is located in the seat body adjacent the first opening and extends around at least a portion of the passage (14). The inlay is located in at least a portion of the channel (22). The groove (24) extends along at least a portion of an inner surface of the passage (14) from the first opening (20) towards the second opening.
Abstract:
Described is a stream turbine with a shaft (3) which, at least over part of its length, is located in a housing (4) through which it passes, one end of the housing (4) being the high-pressure end (10) and the opposite end the steam-exhaust end (12). In addition, the housing incorporates a control valve (30) designed to control the rate of steam flow into the housing (4). The invention calls for the shaft bearings to be dry-running, this being achieved by using magnetic bearings (6, 8, 14) located inside the housing (4) at the high-pressure end (10) and at the steam-exhaust end (12). The invention also calls for the control-valve operation to be oil-free, this being achieved by using an electromagnetic actuator (28).
Abstract:
A conditioning valve (10) for simultaneously reducing the pressure and temperature of steam comprising a valve body (12) with a first chamber (18) having an inlet port (14) for introducing high pressure superheated steam and a second chamber (20) having an outlet port (16) for expelling desuperheated and depressurized steam; an annular seat (22) affixed between said first and second chambers (18, 20); a hollow cylindrical cage (26) slidably coupled with said seat (22), said cage (26) permitting the flow of steam between said first and second chambers (18, 20) in a first position and preventing said flow of steam when in a second position; and water steam means (31) coupled to said cage (26) for adjusting said cage (26) between said first and second positions, said steam means (31) having an outlet (56) for injecting desuperheating water into said second chamber (20) to be mixed with said steam.