Rotary Seal with Anti-Slip Energizing O-Ring

摘要

A seal assembly includes an annular static sealing member disposed within an annular channel in a housing or shaft. An annular dynamic sealing member is disposed coaxially within or about the static member and has a circumferential sealing surface engageable with the shaft or housing. An annular biasing member is disposed radially between the static and dynamic sealing members and is configured to bias the dynamic sealing member radially to maintain engagement of the sealing surface and the shaft or housing. The static member is configured to prevent relative angular displacement between the static and biasing members and the dynamic member is configured to prevent relative angular displacement between the dynamic and biasing members. As such, the dynamic sealing member, the biasing member and the static sealing member angularly displace within the channel as a single unit when torque above a particular magnitude is applied to the dynamic sealing member.

主权项

1. A seal assembly for sealing a space between a housing with a central bore and a rotatable shaft disposed within the bore, one of the housing and the shaft having an annular channel defined by a circumferential surface and first and second facing radial surfaces, the seal assembly comprising:
a generally annular static sealing member disposed within the annular channel and having a central axis; a generally annular dynamic sealing member disposed at least partially within the channel and one of coaxially within the static sealing member and coaxially about the static sealing member, the dynamic sealing member having a circumferential sealing surface sealingly engageable with one of the shaft and the housing; and a generally annular biasing member disposed radially between the static and dynamic sealing members and configured to bias the dynamic sealing member radially to maintain engagement of the sealing surface and the one of the shaft and the housing, the static sealing member being configured to prevent relative angular displacement between the static member and the biasing member and the dynamic sealing member being configured to prevent relative angular displacement between the dynamic member and the biasing member such that the dynamic sealing member, the biasing member and the static sealing member angularly displace within the channel generally as a single unit when torque of at least a particular magnitude is applied to the dynamic sealing member.