| 摘要 |
PROBLEM TO BE SOLVED: To improve service life of a floating seal for a rotating machine. SOLUTION: This floating seal 20 provided on an outer peripheral surface of a turbine rotor 1 of a turbine has an annular seal member 13, an annular holding member 21 surrounding the seal member 13 from outside, and a supporting means 30 contacting to a low pressure side radial surface of the seal member 13. The supporting means 30 is composed of an annular holder 33 for forming a sealing slide surface by abutting to a side surface on the low pressure side of the seal member 13 at a front and a cylindrical sleeve 31 continuously brought into contact with a back of the holder 33 at one end and secured to the annular holding member 21 at the other end.
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