US 12,276,207 B2
High-temperature part and gas turbine including the same
Masahiro Watanabe, Tokyo (JP); Taiki Kinoshita, Tokyo (JP); Kiyoshi Fujimoto, Tokyo (JP); Sosuke Nakamura, Tokyo (JP); Norihiko Motoyama, Tokyo (JP); Kenichi Hashimoto, Tokyo (JP); and Akito Kira, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed on May 15, 2023, as Appl. No. 18/197,231.
Claims priority of application No. 2022-082124 (JP), filed on May 19, 2022.
Prior Publication US 2023/0374906 A1, Nov. 23, 2023
Int. Cl. F01D 5/28 (2006.01); F01D 11/00 (2006.01)
CPC F01D 5/288 (2013.01) [F01D 11/003 (2013.01); F05D 2230/90 (2013.01); F05D 2300/611 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A high-temperature part of a gas turbine, which is allowed to be exposed to a combustion gas, the part comprising:
a high-temperature part body which includes a base having a flow path forming portion which defines a part of a combustion gas flow path through which the combustion gas flows, and a coating layer formed on a part of a surface of the base; and
a protective layer which is formed on at least a part of a surface of the coating layer,
wherein the protective layer is formed of a material which is allowed to disappear from the surface of the coating layer under an operation environment of the gas turbine,
wherein the material forming the protective layer is a resin or a material containing a resin as a main component, and the material has a certain level of elasticity,
wherein the flow path forming portion includes a flow path defining surface which defines a part of the combustion gas flow path, a downstream end surface which is connected to and extends from an edge of the flow path defining surface on a downstream side to which the combustion gas flows, and an upstream end surface which is connected to and extends from an edge of the flow path defining surface on an upstream side opposite to the downstream side,
wherein the coating layer includes a main coating portion which is formed on the flow path defining surface, a downstream coating portion which is formed on the downstream end surface to be connected to the main coating portion, and an upstream coating portion which is formed on the upstream end surface to be connected to the main coating portion,
wherein the protective layer includes an end surface protection portion formed on at least one surface of the downstream coating portion and the upstream coating portion and a main surface protection portion formed on a surface of the main coating portion and connected to the end surface protection portion, and
wherein the protective layer is configured to protect at least one of a corner formed by the main coating portion and the downstream coating portion and a corner formed by the main coating portion and the upstream coating portion.