초록 ▼

An improved end face seal assembly comprises a wall mounted seat assembly having an axial sealing end face and an abutting shaft mounted sealing head assembly having an axial sealing end face slidably engaged therewith to provide a primary dynamic seal. The seat assembly has a peripheral O-ring to p

An improved end face seal assembly comprises a wall mounted seat assembly having an axial sealing end face and an abutting shaft mounted sealing head assembly having an axial sealing end face slidably engaged therewith to provide a primary dynamic seal. The seat assembly has a peripheral O-ring to provide a secondary static seal at the wall mounting. The sealing head assembly comprises a cup shaped cylindrical retainer mounted on a rotating shaft by set screws. Contained within the retainer are a plurality of compression springs, a flat cylindrical disc, and a cylindrical washer. The washer having a sealing end face at one end and a counterbore at the other is captured in the retainer by a snap ring in the retainer engaging an annular shoulder on the washer. A cylindrical O-ring holder having an external O-ring and two internal O-rings provides a secondary seal between the shaft and washer. Spring force maintains contact between the rotating sealing face of the washer and the stationary sealing face of the seat to maintain the primary dynamic seal.

대표청구항 ▼

A mechanical end face seal assembly for a rotary shaft comprising; a cylindrical stationary seat surrounding said shaft, having a central bore and at least one sealing end face, a cylindrical washer surrounding said shaft and movable longitudinally thereof into sealing engagement with said seat end

A mechanical end face seal assembly for a rotary shaft comprising; a cylindrical stationary seat surrounding said shaft, having a central bore and at least one sealing end face, a cylindrical washer surrounding said shaft and movable longitudinally thereof into sealing engagement with said seat end face, said washer having a central bore and a sealing face at one end engageable with said seat end face and having a counterbore at the other end, a hollow cylindrical O-ring retainer surrounding said shaft and positioned within said washer counterbore, said O-ring retainer having a centrally located peripheral groove on its outer surface and at least two laterally-spaced, substantially-parallel, peripheral grooves in the inner surface thereof, an O-ring positioned in said O-ring retainer outer groove to form a seal between said outer surface of said O-ring retainer and said washer counterbore, a plurality of O-rings positioned one in each of said inner surface grooves in said O-ring retainer to form a seal between the outside diameter of said shaft and said O-ring holder and supporting said retainer on said shaft with substantially no wear thereon during extended periods of operation, and spring means biasing said washer longitudinally of said shaft into sealing engagement with said seat.