Turbine blade and gas turbine

Patent metadata

Field	Value
Publication number	US-10655478-B2
Application number	US-201615569247-A
Country	US
Kind code	B2
Filing date	Aug 8, 2016
Priority date	Aug 25, 2015
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

A blade main body ( 51 ) of a gas turbine is provided with a first cooling passage part ( 58 ), a second cooling passage part ( 59 ), a column part ( 60 ), and a plurality of protrusions. The first cooling passage part ( 58 ) is provided at the side near to a leading edge ( 55 ). The second cooling passage part ( 59 ) is provided at the side near to a trailing edge ( 56 ). The column part ( 60 ) is provided between the first cooling passage part ( 58 ) and the second cooling passage part ( 59 ), and is continuously formed between a base part and an end part of the blade main body ( 51 ). The protrusions protrude from the inner wall surfaces of the first cooling passage part ( 58 ) and the second cooling passage part ( 59 ).

First claim

The invention claimed is:

1. A turbine blade comprising a blade main body comprising a leading edge, a trailing edge, and a pressure surface and a suction surface disposed between the leading edge and the trailing edge,
the blade main body comprising:
a first cooling passage part disposed near the leading edge, a cooling medium flowing through the first cooling passage part;
a second cooling passage part disposed near the trailing edge, the cooling medium flowing through the second cooling passage part; and
a column part disposed between the first cooling passage part and the second cooling passage part and continuously formed between a base part and an end part of the blade main body,
the first cooling passage part comprising a plurality of cooling passages divided by a partition wall continuously formed between the base part and the end part of the blade main body so that the cooling passages extend in a blade height direction between the column part and the leading edge and are aligned along a mean line,
the second cooling passage part comprising a plurality of cooling passages divided by a partition wall so that the cooling passages extend in the blade height direction between the column part and the trailing edge and are aligned along the mean line, and
the column part having a thickness in an extending direction of the mean line greater than the thickness of each of the partition walls in the extending direction of the mean line.

2. A turbine blade comprising a blade main body comprising a leading edge, a trailing edge, and a pressure surface and a suction surface disposed between the leading edge and the trailing edge,
the blade main body comprising:
a first cooling passage part disposed near the leading edge, a cooling medium flowing through the first cooling passage part in a flowing direction;
a second cooling passage part disposed near the trailing edge, the cooling medium flowing through the second cooling passage part; and
a column part disposed between the first cooling passage part and the second cooling passage part and continuously formed between a base part and an end part of the blade main body,
the first cooling passage part comprising a plurality of cooling passages divided by a partition wall so that the cooling passages extend in a blade height direction between the column part and the leading edge and are aligned along a mean line, the cooling medium flowing through the cooling passages from the base part to the end part of the blade main body without changing the flowing direction,
the second cooling passage part comprising a plurality of cooling passages divided by a partition wall so that the cooling passages extend in the blade height direction between the column part and the trailing edge and are aligned along the mean line, the cooling medium flowing through the cooling passages from the base part to the end part of the blade main body without changing a flowing direction, and
the column part having a thickness in an extending direction of the mean line greater than the thickness of each of the partition walls in the extending direction of the mean line.

3. A turbine blade comprising a blade main body comprising a leading edge, a trailing edge, and a pressure surface and a suction surface disposed between the leading edge and the trailing edge,
the blade main body comprising:
a first cooling passage part disposed near the leading edge, a cooling medium flowing through the first cooling passage part;
a second cooling passage part disposed near the trailing edge, the cooling medium flowing through the second cooling passage part; and
a column part disposed between the first cooling passage part and the second cooling passage part and continuously formed between a base part and an end part of the blade main body,
the first cooling passage part comprising a plurality of cooling passages divided by a partition wall so that the cooling passages extend in a blade height direction between the column part and the leading edge and are aligned along a mean line,
the second cooling passage part comprising a plurality of cooling passages divided by a partition wall so that the cooling passages extend in the blade height direction between the column part and the trailing edge and are aligned along the mean line,
the column part having a thickness in an extending direction of the mean line greater than the thickness of each of the partition walls in the extending direction of the mean line, and
the column part comprising no cooling passage through which the cooling medium flows.

4. The turbine blade according to claim 1 , wherein
the cooling passages of the first cooling passage part comprise a leading edge side cooling passage and a first intermediate cooling passage, the leading edge side cooling passage extending in the blade height direction between the column part and the leading edge, being arranged along the mean line, and being arranged closest to the leading edge, the first intermediate cooling passage being arranged closer to the column part than the leading edge side cooling passage is and having a flow channel cross-sectional area larger than that of the leading edge side cooling passage, and
the cooling passages of the second cooling passage part comprise a trailing edge side cooling passage and a second intermediate cooling passage, the trailing edge side cooling passage extending in the blade height direction between the column part and the trailing edge, being arranged along the mean line, and being arranged closest to the trailing edge, the second intermediate cooling passage being arranged closer to the column part than the trailing edge side cooling passage is and having a flow channel cross-sectional area larger than that of the trailing edge side cooling passage.

5. The turbine blade according to claim 2 , wherein
the cooling passages of the first cooling passage part comprise a leading edge side cooling passage and a first intermediate cooling passage, the leading edge side cooling passage extending in the blade height direction between the column part and the leading edge, being arranged along the mean line, and being arranged closest to the leading edge, the first intermediate cooling passage being arranged closer to the column part than the leading edge side cooling passage is and having a flow channel cross-sectional area larger than that of the leading edge side cooling passage, and
the cooling passages of the second cooling passage part comprise a trailing edge side cooling passage and a second intermediate cooling passage, the trailing edge side cooling passage extending in the blade height direction between the column part and the trailing edge, being arranged along the mean line, and being arranged closest to the trailing edge, the second intermediate cooling passage being arranged closer to the column part than the trailing edge side cooling passage is and having a flow channel cross-sectional area larger than that of the trailing edge side cooling passage.

6. The turbine blade according to claim 3 , wherein
the cooling passages of the first cooling passage part comprise a leading edge side cooling passage and a first intermediate cooling passage, the leading edge side cooling passage extending in the blade height direction between the column part and the leading edge, being arranged along the mean line, and being arranged closest to the leading edge, the first intermediate cooling passage being arranged closer to the column part than the leading edge side cooling passage is and having a flow channel cross-sectional area larger than that of the leading edge side cooling passage, and
the cooling passages of the second cooling passage part comprise a trailing edge side cooling passage and a second intermediate cooling passage, the

Assignees

• Mitsubishi Hitachi Power Sys

Inventors

• Takamura Keita
• Hada Satoshi
• Atsumi Hidekatsu

Classifications

• F01D5/225

  by shrouding · CPC title

• F02C7/18

  the medium being gaseous, e.g. air {(F02C7/125 takes precedence)} · CPC title

• F01D5/189 Primary

  the insert having a tubular cross-section, e.g. airfoil shape · CPC title

• F01D5/187 Primary

  Convection cooling · CPC title

• F01D5/22

  Blade-to-blade connections, {e.g. for damping vibrations} · CPC title