TURBINE BLADE - MITSUBISHI HITACHI POWER SYS

Title:

TURBINE BLADE

Document Type and Number:

Japanese Patent JP2017150459

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To provide a turbine blade capable of restricting development of an interface layer by dampening a speed reduction gradient of fluid flowing along a heat shielding material at a back side.SOLUTION: This invention relates to a turbine blade 11 having cooling flow passages 15a to 15f formed inside the blade and extending in a blade height direction in which a back side blade surface 12 and a berry side blade surface 13 are covered by a heat shielding material 14, and a back side design point P1 is set in a range on the back side blade surface 12 at each of the blade sections perpendicular to a blade height direction, a back side from a position S of a throat at a back side from this position S including it and a front side not including a position R at the rear end of the final cooling flow passage 15f and at a front side than this position R. A thickness distribution of the heat shielding material 14 at the back side of each of the blade sections shows a uniform thickness of the heat shielding material 14 from the blade front edge over the design point P1 and a thickness of the heat shielding material 14 is gradually decreased as it faces from the design point P1 over the blade rear edge toward the back side.SELECTED DRAWING: Figure 5

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Inventors:

KIMURA YASUNORI
HIGUCHI SHINICHI
MIYOSHI ICHIRO
TAKEDA TAKUYA

Application Number:

JP2016036284A

Publication Date:

August 31, 2017

Filing Date:

February 26, 2016

Export Citation:

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Assignee:

MITSUBISHI HITACHI POWER SYS

International Classes:

F01D5/28; F01D5/18; F01D9/02; F02C7/00; F02C7/18

Domestic Patent References:

JP2013194667A	2013-09-30
JPH0610608A	1994-01-18
JPS572406A	1982-01-07
JPS52155141A	1977-12-23

Foreign References:

US8070454B1	2011-12-06
US20130121839A1	2013-05-16
US20080203236A1	2008-08-28
US20070148003A1	2007-06-28
US4121894A	1978-10-24
US20150369060A1	2015-12-24

Attorney, Agent or Firm:

Kaichi International Patent Office

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