Steam turbine, steam turbine plant and method for cooling a steam turbine
AssigneeSiemens Aktiengesellschaft
InventorsEdwin Gobrecht, Michael Wechsung
Life of this patent
Estimating the term…
Abstract
A steam turbine with a steam inlet region, an exhaust-steam region and a blading region surrounded by a turbine housing and disposed axially therebetween. Furthermore, a cooling-fluid inlet is provided which can be closed and opened by a closing member and through which cooling fluid can be introduced into the turbine housing. The introduced cooling fluid can be conducted out of the turbine housing again via a suction device for sucking out the cooling fluid. The invention relates, furthermore, to a steam turbine plant and to a method for cooling the steam turbine.
Claims12
A steam turbine, comprising:
- a steam inlet region;
- an exhaust-steam region;
- a blading region disposed axially between said steam inlet region and said exhaust-steam region;
- a turbine housing surrounding said blading region;
- a suction device having a suction capacity for sucking cooling fluid out of said turbine housing;
- at least one cooling-fluid inlet disposed upstream of said exhaust-steam region in regards to a flow direction of action steam flowing through said turbine housing during a normal operating mode, said at least one cooling-fluid inlet introducing the cooling fluid into said turbine housing for cooling down a temperature during a shutdown mode of operation;
- and
- a closing member for opening and closing said at least one cooling-fluid inlet.
A steam turbine plant, comprising:
- a high-pressure part turbine having a high-pressure housing and an exhaust-steam region;
- a first cooling fluid inlet disposed upstream of said exhaust steam region of said high-pressure part turbine and connected to said high-pressure housing;
- a medium-pressure part turbine having a medium-pressure housing and an exhaust-steam region;
- a second cooling fluid inlet disposed upstream of said exhaust steam region of said medium-pressure part turbine and
- connected to said medium-pressure housing;
- a condenser;
- a suction conduit connected to said condenser;
- a first connecting conduit connecting said high-pressure part turbine to said condenser;
- a second connecting conduit connecting said medium-pressure part turbine to said condenser;
- and
- a suction device connected to said condenser via said suction conduit, to said high-pressure part turbine via said first connecting conduit and to said medium-pressure part turbine via said second connecting conduit, said condenser being flow-disposed between said high-pressure part turbine, said medium-pressure part turbine and said suction device.
An improved method for cooling a steam turbine having a turbine housing, the improvement which comprises:
- flow-connecting a cooling-fluid inlet to the turbine housing after shutting down the steam turbine;
- and
- conducting a cooling fluid flowing in through the cooling-fluid inlet through the turbine housing in a direction of an action steam flowing through the steam turbine in normal operating mode via a suction device, the cooling fluid absorbing and removing heat from the steam turbine.
Dependencies are inferred from the claim text.