초록 ▼

A rotary seal assembly for preventing leakage of a fluid from a region of high pressure in a housing to a region of relatively lower pressure includes a first member mounted within the housing and having a central axis and an annular sealing face extending in a direction substantially radial the cen

A rotary seal assembly for preventing leakage of a fluid from a region of high pressure in a housing to a region of relatively lower pressure includes a first member mounted within the housing and having a central axis and an annular sealing face extending in a direction substantially radial the central axis, and a second member located in the housing and having an annular sealing face extending in a direction substantially radial to the central axis and opposing the first member sealing face. The second member sealing face has a first set of grooves and a second set of grooves arranged circularly thereabout, the second set of grooves being spaced radially inward of the first set of grooves. One of the first and second members is a rotor and the other is a stator. A stator holding assembly supports the stator within the housing, the rotor being rotatable about the central axis. The stator holding assembly secures the stator against rotation and urges the stator sealing face toward the rotor sealing face. Pressurized fluid flows between the sealing faces and within the first and second set of grooves, thereby forming a gas film seal between the sealing faces.

대표청구항 ▼

[ What is claimed is:] [1.] A rotary seal assembly for preventing leakage of a fluid from a region of high pressure in a housing to a region of relatively lower pressure, the assembly comprising:a first member mounted within the housing and having a central axis and an annular sealing face extending

[ What is claimed is:] [1.] A rotary seal assembly for preventing leakage of a fluid from a region of high pressure in a housing to a region of relatively lower pressure, the assembly comprising:a first member mounted within the housing and having a central axis and an annular sealing face extending in a direction substantially radial to the central axis;a second member located in the housing and having an annular sealing face extending in the direction substantially radial to the central axis and opposing the first member sealing face, the second member sealing face having a first set of grooves and a second set of grooves arranged circularly thereabout, the second set of grooves being spaced radially inward of the first set of grooves, one of the first and second members being a rotor and the other being a stator, the rotor being rotatable about the central axis, each of the grooves within the first set of grooves and the second set of grooves extending in the same direction spirally about the central axis so that the first set of grooves and the second set of grooves pump fluid in the same radial direction during rotation of the rotor with respect to the stator; anda stator holding assembly supporting the stator within the housing, the stator holding assembly securing the stator against rotation and urging the stator sealing face toward the rotor sealing face, pressurized fluid flowing between the sealing faces and within the first and second set of grooves, thereby forming a gas film seal between the sealing faces.