BEARING ISOLATOR SEAL FOR ROTATING SHAFT

摘要

A bearing isolator seal includes a rotor and stator wherein the stator has inboard and outboard radial projections which define a groove bounded by groove side faces and a groove bottom face. The rotor extends radially and then axially so as to lie closely adjacent to the terminal end of the outboard radial projection on the stator to define an entrance passageway. The bearing isolator seal includes a surface geometry which is believed to result in improved exclusion of contaminants, particularly from high velocity water spray, wherein the entrance passageway is angled to increase the rotational effects of exclusion during shaft rotation, and wherein the groove side faces are also angled to assist in redirecting spray and other contaminants away from the passageway.

主权项

1. A bearing isolator seal for sealing a bearing cavity between an equipment housing and a rotatable shaft, said bearing isolator seal comprising:
a housing-mountable stator having a mounting portion engagable with an equipment housing, an inboard radial flange located for axial abutment against an exterior end face of an equipment housing, and an outboard radial flange spaced axially from said inboard radial flange, said inboard and outboard radial flanges being axially spaced apart so as to define respective first and second groove side faces and a groove bottom face extending axially therebetween to define an annular, groove opening radially outwardly, each of said first and second groove side faces being inclined at respective obtuse angles relative to said bottom groove face; a shaft-mountable, rotatable rotor wherein said rotor and stator have closely spaced, opposing passageway surfaces which define an entrance passageway between an outer stator face of said second radial flange and an opposing inner rotor face on said rotor, said entrance passageway extending at an angle relative to a shaft axis to which said bearing isolator seal is mountable, said entrance passageway opening toward said inboard radial flange of said stator at a passage angle, wherein said obtuse angles of said first and second groove side faces deflecting fluid away from said entrance passageway and said passage angle of said entrance passageway increases centrifugal exclusion of fluids during rotation of said rotor.