Shaft Sealing Device And Rotary Machine

Abstract: This shaft sealing device is disposed between a rotor and a stator, and partitions an annular space between the outer peripheral surface of the rotor and the inner peripheral surface of the stator into a first axial side and a second axial side. The shaft sealing device comprises fins radially protruding from the rotor toward the stator, and a sealing member radially facing the fins, wherein the sealing member comprises: a first sealing layer formed of a porous abradable material having a first porosity; and a second sealing layer which is stacked on the first sealing layer at a position close to the fins and forms a contact surface with the fins, and is formed of a porous abradable material having a second porosity lower than the porosity of the first sealing layer.

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