Patent FR1479935A successfully refreshed from Google Patents.
EP0241180A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Gas turbine blade
Assignee: Toshiba Corp
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Filing: 1987-03-24
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Granted: —
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Expires: 2007-03-24
Abstract
Abstract A blade of a gas turbine includes a main body (10) having a dovetail portion (12) and a blade portion (14) extending from the dovetail portion. A cooling air passage (28) for flowing a cooling air is formed in the main body to cool the blade portion. The passage includes a cooling air inlet port (32) open to the dovetail portion and an inlet port (38) open to an extending tip (16) of the blade portion. A first passage portion (34) extends from the inlet port to the portion close to the extended tip along a leading edge (18) of the blade portion. A final passage portion (40) extends from the dovetail portion to the outlet port. The flow sectional area of the final passage portion is gradually decreased from the dovetail portion toward the outlet port. The final passage portion communicates with a number of film cooling holes (42) which are open to the suction side surface of the blade portion.
Inventors
- 👤 Fumio C/O Patent Division Ohtomo
- 👤 Yasuo c/o Patent Division Okamoto
- 👤 Shoko C/O Patent Division Ito
- 👤 Yoshitaka C/O Patent Division Fukuyama
- 👤 Hideo C/O Patent Division Iwasaki
- 👤 Takeshi C/O Patent Division Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 02:02
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/187; F05; F05D; F05D2260/00; F05D2260/20; F05D2260/202; F05D2260/221; F05D2260/2212
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
216 words
A blade of a gas turbine, comprising: a main body including a dovetail portion, and a blade portion extending from the dovetail poriton, said blade portion having an extended tip, leading and trailing edges which extend substantially along the extending direction of the blade portion, and a suction side surface and a pressure side surface which are located between the leading and trailing deges and face each other; and cooling means for introducing cooling air inside the main body to cool the main body; characterized in that: said cooling means (26) includes a cooling air passage (28) formed in the main body (10), said cooling air passage having a cooling air inlet port (32) open to the dovetail portion (12), an outlet port (38) open to the extended tip (16) of the blade portion (14), a first passage poriton (34) extending from the inlet port close to the extended tip along the leading edge (18), a final passage portion (40) extending from the dovetail portion to the outlet port, the final passage portion being formed so that its flow sectional area is gradually decreased from the dovetail portion toward the outlet port, and a plurality of film cooling holes (42) which are open to the suction side surface (22) and communicate with the final passage portion.
Claim 2
Dependent Claim
216 words
A blade of a gas turbine, comprising: a main body including a dovetail portion, and a blade portion extending from the dovetail poriton, said blade portion having an extended tip, leading and trailing edges which extend substantially along the extending direction of the blade portion, and a suction side surface and a pressure side surface which are located between the leading and trailing deges and face each other; and cooling means for introducing cooling air inside the main body to cool the main body; characterized in that: said cooling means (26) includes a cooling air passage (28) formed in the main body (10), said cooling air passage having a cooling air inlet port (32) open to the dovetail portion (12), an outlet port (38) open to the extended tip (16) of the blade portion (14), a first passage poriton (34) extending from the inlet port close to the extended tip along the leading edge (18), a final passage portion (40) extending from the dovetail portion to the outlet port, the final passage portion being formed so that its flow sectional area is gradually decreased from the dovetail portion toward the outlet port, and a plurality of film cooling holes (42) which are open to the suction side surface (22) and communicate with the final passage portion.
Claim 3
Dependent Claim
45 words
A blade according to claim 1, characterized in that said final passage portion (40) is located at substantially a midpoint between the leading and trailing edges (18, 20), and the film cooling holes (58) are aligned along the extending direction of the final passage portion.
Claim 4
Dependent Claim
45 words
A blade according to claim 1, characterized in that said cooling air passage (28) has at least one communicating passage portion (36) which extends along the extending direction of the blade portion and connects the first passage portion (34) and the final passage portion (40).
Claim 5
Dependent Claim
107 words
A blade according to claim 1, characterized in that said cooling means (26) comprises a second cooling air passage (30) formed in the main body (10), the second cooling air passage including a cooling air inlet port (48) open to the dovetail portion (12), an outlet port (54) open to the extended tip (16) of the blade portion (14), a first passage portion (50) extending from the inlet port close to the extended tip, and a final passage portion (56) extending from the dovetail portion to the outlet port, the final passage portion being formed so that its flow sectional area is gradually decreased toward the outlet.
Claim 6
Dependent Claim
84 words
A blade according to claim 4, characterized in that said first passage portion (50) of the second cooling air passage (30) is located at substantially a midpoint between the leading and trailing edges (18 , 20), the final passage portion (56) extends adjacent to the trailing edge, and the second cooling air passage has a plurality of film cooling holes (58) which are open to the pressure side surface (24) of the blade portion (14) and communicate with the first passage portion (50) thereof.
Claim 7
Dependent Claim
74 words
A blade according to claim 5, characterized in that said blade portion (14) includes a slit (60) formed along the trailing edge (20), and a large number of pins (64) arranged in the slit and extending in a direction perpendicular to the pressure and suction side surfaces (24, 22), and the second cooling air passage (30) has a plurality of orifice holes (62) which connect the final passage portion (56) and the slit (60).
Claim 8
Dependent Claim
82 words
A blade according to claim 4, characterized in that said first passage portion (50) of the second cooling air passage (30) extends adjacent to the leading edge (20), the final passage portion (56) is located at substantially a midpoint between the leading and trailing edges (18, 20), and the second cooling air passage has a plurality of film cooling holes (58) which are open to the pressure side surface (24) of the blade portion (14) and communicate with the final passage portion.
Claim 9
Dependent Claim
72 words
A blade according to claim 7, characterized in that said blade portion (14) includes a slit (60) formed along the trailing edge (20), and a large number of pins (64) arranged in the slit and extending in a direction perpendicular to the pressure and suction side surfaces (24, 22), and the second cooling air passage has a plurality of orifice holes (62) which connect the first passage portion (50) and the slit.
References Cited (Backward Citations)
No citation records indexed.
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