Sealing device

摘要

A sealing device is provided with a floating ring between an outer periphery of a rotating shaft and an inner periphery of a casing and is characterized in that a turn-stopping means is provided to a single point in a circumferential direction of the floating ring, and a groove for generating dynamic pressure is provided in unequal distribution in the circumferential direction to an inner peripheral surface of the floating ring, wherein a dynamic pressure is generated by a dynamic pressure groove provided to the inner peripheral surface of the floating ring and is employed to thereby match together the center of the rotating shaft and the floating ring.

主权项

1. A sealing device provided with a floating ring between an outer periphery of a rotating shaft and an inner periphery of a casing, wherein a turn-stopping means is provided only to a single point defined in a circumferential direction of the floating ring, and grooves for generating dynamic pressure are provided to an inner peripheral surface of the floating ring facing the outer periphery of the rotating shaft, wherein all the grooves for generating dynamic pressure are open to the outer periphery of the rotating shaft and are closed to the inner periphery of the casing, and are provided on the inner peripheral surface of the floating ring only in a first quadrant or only in the first quadrant and a second quadrant of the inner peripheral surface of the floating ring in a coordinate system as viewed in an axial direction of the rotating shaft where an origin is placed at a center of the rotating shaft and the turn-stopping means is on a left side such as to generate force for moving the floating ring upward as a whole when in use wherein downward force by gravity is exerted on the floating ring.