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US 2002/0172595 A1Published application
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.
Claims15
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,
- wherein said turbine casing is divided into two casing sections, each of said divided turbine casing sections being further divided into a turbine casing upper half and a turbine casing lower half, said turbine casing lower halves of the divided turbine casing sections being connected to each other by a fastening member inserted from a side of said turbine low pressure portion.
2 more elements
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,
- wherein said turbine casing is divided into two casing sections, each of said divided turbine casing sections being further divided into a turbine casing upper half and a turbine casing lower half, said turbine casing upper halves of the divided turbine casing sections are connected to each other by a fastening member inserted from either one of sides of the turbine high pressure portion and the turbine low pressure portion.
2 more elements
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.
2 more elements
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,
- wherein said turbine casing is divided into two casing sections, each of said divided turbine casing sections being further divided into a turbine casing upper half and a turbine casing lower half, said turbine casing upper and lower halves of the divided turbine casing sections being formed with flanged portions respectively, and at least one of said flanged portions of said turbine casing upper and lower halves being formed with a steam passage.
2 more elements
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,
- wherein said turbine casing is divided into two casing sections, each of said divided turbine casing sections being further divided into a turbine casing upper half and a turbine casing lower half, said turbine casing lower halves of the divided turbine casing sections being formed with steam inlets.
2 more elements
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,
- wherein said turbine rotor is supported at both longitudinal ends thereof by a high pressure side journal bearing and a low pressure side journal bearing accommodated in a bearing box in a manner that either one of said high pressure side journal bearing and said low pressure side journal bearing is overhung apart from a base to shorten a bearing span.
2 more elements
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 steam having pressure of 100 kg/cm2 or higher and temperature of 500° C. or higher is supplied to at least one or more of said turbine high pressure portion, said turbine intermediate pressure portion and said turbine low pressure portion so that an output power of the steam becomes 100 MW or greater, and a height of a turbine movable blade of a final stage of said turbine lower pressure portion is made to 36 inches or more in a region at a revolution number of 3,000 rpm and is made to 33.5 inches or more in a region at a revolution number of 3,600 rpm.
2 more elements
Dependencies are inferred from the claim text.