Shaft sealing device and rotating machine comprising same

A shaft sealing device provided in an annular space between a rotor and a stator surrounding an outer periphery of the rotor to divide the annular space into a high-pressure region and a low-pressure region in a direction of an axis of the rotor, the shaft sealing device comprising:

• a seal body having a plurality of thin plate sealing pieces that extend from the stator toward a radial inner side of the rotor and are stacked in a circumferential direction of the rotor;
• a high-pressure side plate that extends from the stator toward the radial inner side so as to run along a high-pressure side of the seal body, and is segmented into a plurality of portions in the circumferential direction;
• and
• a rigidity imparting member configured to impart rigidity in the direction of the axis of the rotor to a portion of a surface of the high-pressure side plate that faces the high-pressure region,
• wherein the rigidity imparting member is a plurality of ribs formed integrally with the surface of the high-pressure side plate that faces the high-pressure region, and
• wherein the plurality of ribs is arranged at intervals in the circumferential direction.

A shaft sealing device provided in an annular space between a rotor and a stator surrounding an outer periphery of the rotor to divide the annular space into a high-pressure region and a low-pressure region in a direction of an axis of the rotor, the shaft sealing device comprising:

• a seal body having a plurality of thin plate sealing pieces that extend from the stator toward a radial inner side of the rotor and are stacked in a circumferential direction of the rotor;
• a high-pressure side plate that extends from the stator toward the radial inner side so as to run along a high-pressure side of the seal body, and is segmented into a plurality of portions in the circumferential direction;
• and
• a rigidity imparting member configured to impart rigidity in the direction of the axis of the rotor to a portion of a surface of the high-pressure side plate that faces the high-pressure region,
• wherein the rigidity imparting member is an elastic member that presses a portion of the high-pressure side plate from the high-pressure region side toward the low-pressure region side, and
• wherein in an entire area of an inner wall surface facing the surface of the high-pressure side plate that faces the high-pressure region, a plurality of fins, which extend in the radial direction, is arranged at intervals in the circumferential direction, and is configured to suppress a fluid that flows in the circumferential direction.