Seal design with bi-directional pumping feature

Details Seal design with bi-directional pumping feature Seal design with bi-directional pumping feature

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 15/32 (2006.01) F16J 15/54 (2006.01)

Patent

CA 2152737

A shaft seal of the type utilizing a metal support element or seal case which fits or is inserted into a housing. The seal includes a seal element extending radially inward which when disposed over the shaft causes the seal to flex about a flex section thus applying a contacting force to a seal lip, The seal lip includes a plurality of radial undulations along the seal face, said undulations radial with respect to the axis of the shaft. Said seal lip further including a static seal for engaging the outer circumferential surface of the shaft, The seal element is formed of a semi-rigid material such as a fluorinated resin or thermo-plastic elastomer. Such seals exhibit high-wear characteristics opposed to the low-wear characteristics of an elastomer. Further, the seal element includes a plurality of symmetrical undulations which provide a hydro-dynamic pumping effect to pump any fluid migrating along the shaft/seal interface back into the sealed space.

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