초록 ▼

A normally non-contacting rotary seal is disclosed which prevents fluid from leaking from one zone, or compartment, to the next through an opening in the compartment separating wall, or bulkhead, through which a rotating shaft passes. The passage of fluid through the wall opening is prevented regard

A normally non-contacting rotary seal is disclosed which prevents fluid from leaking from one zone, or compartment, to the next through an opening in the compartment separating wall, or bulkhead, through which a rotating shaft passes. The passage of fluid through the wall opening is prevented regardless of which side of the wall becomes flooded. An annular resilient seal, having spaced apart radial flanges, is secured around the shaft for rotation therewith in an annular chamber at the separating wall. No part of the seal normally contacts the stationary walls of the chamber. In the event one compartment becomes flooded, liquid flows past the seal flange adjacent that compartment into the chamber, forcing the other seal flange into sealing contact with the wall of the chamber to block the flow of the liquid into the adjacent compartment. In another embodiment, a stabilizing ring is mounted between the flanges.

대표청구항 ▼

Apparatus for blocking the flow of fluid from one compartment to an adjacent compartment and alternatively from said adjacent compartment to said one compartment through a partition having a rotatable shaft extending therethrough, the apparatus comprising a housing in said partition having a pair of

Apparatus for blocking the flow of fluid from one compartment to an adjacent compartment and alternatively from said adjacent compartment to said one compartment through a partition having a rotatable shaft extending therethrough, the apparatus comprising a housing in said partition having a pair of spaced wall sections, said wall sections having aligned openings on an axis to receive with clearance said shaft as it extends from said one compartment to said adjacent compartment, said housing defining in said partition an internal totally enclosed chamber except for said openings and said housing defining with said partition a fluid tight barrier between said compartments except for said openings, a resilient seal having a hub portion and a pair of spaced flanges, a band around said hub portion and between said flanges to clamp the hub portion securely to the shaft, said flanges extending radially outwardly from said hub portion beyond the boundaries of said openings in closely spaced relation to said wall sections, one of said flanges pressed into sealing contact with the wall section adjacent thereto on the increase of fluid pressure within said chamber above the pressure in the compartment on the other side of the wall from said one flange to block the flow of fluid between said compartments and, alternatively, the other of said flanges pressed into sealing contact with the wall section adjacent thereto on the increase of fluid pressure within said chamber above the pressure in the compartment on the other side of the wall from said other of said flanges to block the flow of fluid between said compartments.