SEAL DEVICE AND ROTARY MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a seal device capable of adjusting a seal gap with a simple device constitution, and a rotary machine including the same.SOLUTION: A seal device 4 for suppressing a leakage flow of a fluid via an annular gap 5 between a stationary member 2 and a rotary member 3 of a rotary machine 1 includes: an annular fixed fin 40 provided in the annular gap 5; and an annular movable fin 60 provided adjacent to the fixed fin 40 in an axial direction inside the annular gap 5. The thermal expansion coefficient of the movable fin 60 is larger than that of the fixed fin 40, and the movable fin is fixed to the fixed fin 40 only in a fixed region on a base end side 61 of the movable fin 60.SELECTED DRAWING: Figure 2