BI-DIRECTIONAL SHAFT SEAL

摘要

A non-contacting seal is provided, including a first sealing face formed on an end of a primary ring and a second sealing face formed on an end of a mating ring. Grooves may be formed in at least one of the first and second sealing faces, such that the grooves extend from one edge of the respective sealing face to an intermediate radius of the respective sealing face. At least one groove may include an entrance edge along the one edge of the respective sealing face and a dam wall opposite the entrance edge. The at least one groove may also include two symmetric side walls extending from the entrance edge to the dam wall. The two symmetric side walls may include a first convex curve extending from the entrance edge to a transition point and a second concave curve extending from the transition point to the dam wall.

主权项

1. A non-contacting seal for use with a rotating shaft, the non-contacting seal comprising:
a primary ring configured to be spring-loaded in a stationary housing; a first sealing face formed on an end of the primary ring; a mating ring configured to be fixed to the rotating shaft; a second sealing face formed on an end of the mating ring; and a plurality of grooves formed in at least one of the first sealing face and the second sealing face, such that the plurality of grooves extends from one edge of the respective sealing face to an intermediate radius, RB, of the respective sealing face, the intermediate radius, RB, being between an inner radius, RO, and an outer radius, RH, of the respective sealing face, and at least one groove of the plurality of grooves comprising:
an entrance edge along the one edge of the respective sealing face;a dam wall opposite the entrance edge; andtwo symmetric side walls extending from the entrance edge to the dam wall, each of the two symmetric side walls comprising a concave curve extending from the entrance edge to the dam wall.