Kraftwerk Union Aktiengesellschaft

Siemens Aktiengesellschaft

Herbert Keller

Dietmar Bergmann

Ludwig Romer

Bruno Krieg

A method is provided for cooling a low pressure steam turbine operating in a ventilation mode. The low pressure steam turbine has a closable inlet through which steam can be delivered when operating in a power generation mode and which is blocked off when operating in ventilation mode, an outlet which communicates with a condenser for condensing the steam to condensate and a bleed port between the inlet and the outlet. A bleed pipe is connected to the bleed port for diverting steam and/or condensate during operation in the power generation mode. Steam is supplied through a steam transfer pipe to the bleed pipe in order to cool the low pressure steam turbine when operating in the ventilation mode. Condensate may also be supplied to the bleed pipe. The cooling effect in the low pressure steam turbine is largely limited to those components which suffer most when it is operating in the ventilation mode, and the cooling provisions are extracted from resources that are already available.

Method for cooling a low pressure steam turbine operating in the

An axial-admission steam turbine, includes a steam inflow region, guide vane rings including a first guide vane ring, guide vanes of the first guide vane ring having radially inner ends, a shaft being rotatable in a given direction, an annular shaft shield being connected to the radially inner ends of the guide vanes of the first guide vane ring and being disposed in vicinity of the steam inflow region, the annular shaft shield surrounding the shaft at a distance defining a ring canal therebetween, the annular shaft shield having nozzles formed therein for discharging into the ring canal tangentially relative to the shaft as seen in the given direction of rotation of the shaft.

Axial-admission steam turbine, especially of double-flow construction

Vibration damping guide vane ring assembly of an axial flow turbomachine, including mutually adjacent guide vanes, individual cover plates each being rigidly connected to a respective guide vane forming a cover band of the guide vane ring, the cover plates being frictionally connected to each other and the cover plates of the adjacent guide vanes having wedge-shaped recesses formed therein between the cover plates, and wedge-shaped damping elements having surfaces and being movably inserted in the recesses, each of the wedge-shaped damping elements exerting a vibration damping pressure on the respective cover plates through the surfaces of the damping elements in response to an axial pressure difference across the guide vane ring.

Device for vibration damping in a guide vane ring

A cone-shaped screening member for separating solids from a gaseous medium such as steam flowing through a pipe line. The cone shaped member has a plurality of spaced annular screen elements of increasing diameters disposed behind each other with the cross section of each screen element shaped substantially as an obtuse triangle. Particular features of the screening member are,

Screening member for separating solids from gaseous media

A turbomachine having a stationary housing and a rotatable rotor mounted therein and including a series of rotor blade rings carried by the rotor and a series of guide vane rings carried by the housing, the guide vane rings and the rotor blade rings being disposed in mutually alternating relationship, further includes means defining an annular space located forward of the first rotor blade ring of the series of rotor blade rings, flow medium supply means communicating with the annular space for supplying flow medium thereto, the annular space extending radially outwardly and along the entire periphery of the turbomachine for producing a torsional flow of the flow medium, the rotor having a shaft formed with a collar, and the series of rotor blade rings including a first blade ring mounted on the collar directly behind the annular space and having a diameter greater than that of the succeeding blade rings of the series, whereby the flow medium supplied to the annular space axially impinges directly on the first blade ring without being initially guided by any guide vane rings.

Turbomachine, such as a steam turbine with high steam inlet temperature,

A separator member is formed of separator elements having the cross section of a substantially obtuse triangle and extending obliquely staggered behind and mutually spaced from one another, one side of the triangle extending parallel to the flow direction, pairs of adjacent separator elements, respectively, defining a flow channel flaring outwardly in downstream flow direction. For direct installation into a steam line, the separator member is of conical construction with annular separator elements of increasing diameter.

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Mulheim, Germany

Herbert Keller