Sealing assembly with floating gland means for rotatable shafts

摘要

A sealing assembly suited for use in a high temperature and/or high pressure environment with a device such as a pump having a rotatable shaft. The sealing assembly comprises a sealing ring including a body portion having a flange with an end face at one end thereof, the sealing ring being adapted to be mounted on the shaft and rotatable relative thereto. A first gland is loosely mounted on the shaft adjacent the sealing ring, the gland having a first recess to receive the body portion of the sealing ring and the gland having a second recess surrounding the first recess to receive the flange of the sealing ring. The gland is dimensioned relative to the sealing ring whereby the gland is adapted to be loosely mounted on the shaft and the sealing ring for floating action relative thereto subject to the pressure of the environment. A second gland is adapted to be secured to the device, the second gland having a sealing surface adapted to engage the end face of the flange on the sealing ring whereby when the pressure of the environment is directed along the rotatable shaft against the first gland, the first gland and the sealing ring are free to rotate on the rotatable shaft and the flange of the sealing ring is forced against the sealing surface of the second gland under the action of the pressure of the environment to provide a seal therebetween for the rotatable shaft.