Brush seal

摘要

A brush seal arrangement for sealing cooperation between a shaft and a surrounding member which is relatively rotatable with respect to the shaft. The brush seal includes an annular rotor disposed in surrounding relationship to the shaft and sealed with respect to the housing, and the rotor mounts thereon first and second annular bush members which are disposed in axially spaced relation and which have annular edge portions which create a frictional and sealing engagement with the shaft to nonrotatably and sealingly couple the rotor to the shaft. A passage extends through the rotor for communication with an annular region defined between the annular brushes in surrounding relationship to the shaft, and a pressurized buffer gas is supplied through the passage into the annular region.