| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary machine in which a gap between a rotor blade and a casing is decreased to the maximum extent to improve fluid performance and besides the quantity of heat generated by friction when an extremity of the rotor blade comes in contact with the casing and reactive force against the rotor blade can be decreased. SOLUTION: There is provided a rotary machine equipped with a rotating rotor blade 5 and the casing 4 enclosing the rotor blade. In the rotary machine, an inter-rotor blade gap control coating 19 applied to an inner surface of the casing 4 comprise a first coating 7 which is composed of alloy layers and is used for joining and a second coating 8 which is applied to the inner surface of the casing 4 via the first coating 7 and is composed of alloy layers or ceramic layers and further abrades away when coming in contact with the extremity of the rotor blade 5. The second coating 8 is applied to a region corresponding to the range in thickness of the extremity of the rotor blade 5 from 50% to 100% of the maximum value. COPYRIGHT: (C)2009,JPO&INPIT |
