Steam turbine
AssigneeKabushiki Kaisha Toshiba
InventorsMasataka Kikuchi, Toru Takahashi
Life of this patent
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Abstract
A steam turbine includes a turbine casing, in which a turbine rotor is accommodated so as to extend along a direction of flow of steam, and a plurality of turbine pressure sections are mounted to the turbine rotor, which includes, in combination, at least two or more of a turbine high pressure portion, a turbine intermediate pressure portion and a turbine low pressure portion. The turbine casing is divided into two casing sections, each of the divided turbine casing sections being further divided into a turbine casing upper half and a turbine casing lower half, and the turbine casing lower halves of the divided turbine casing sections being connected to each other by a fastening member such as stud bolt inserted from a side of the turbine low pressure portion.
Claims4
A steam turbine comprising:
- a turbine casing;
- a turbine rotor accommodated in the turbine casing so as to extend along a direction of flow of steam;
- and
- a plurality of turbine pressure sections to be mounted to the turbine rotor including, in combination, at least two or more of a turbine high pressure portion, a turbine intermediate pressure portion and a turbine low pressure portion, said two or more turbine pressure portions being provided with pressure stages each including a turbine nozzle and a movable blade in combination,
- wherein a partial arc admission is formed to each of said pressure stages on an upstream side of a steam flow in the turbine casing.
A steam turbine comprising:
- a turbine casing;
- a turbine rotor accommodated in the turbine casing so as to extend along a direction of flow of steam;
- a plurality of turbine pressure sections to be mounted to the turbine rotor including, in combination, at least two or more of a turbine high pressure portion, a turbine intermediate pressure portion, and a turbine low pressure portion, the two or more turbine pressure portions being provided with pressure stages each including a turbine nozzle and a movable blade;
- and
- wherein a partial arc admission is formed within each of the pressure stages on an upstream side of a steam flow in the turbine casing such that when coordinate axes are placed on a center of the turbine rotor and the turbine rotor is divided into first, second, third, and fourth quadrants relative to a counterclockwise direction, the partial arc admission is formed in an angular region connecting the first and fourth quadrants.
Dependencies are inferred from the claim text.