SHAFT SEAL STRUCTURE OF HIGH TEMPERATURE FINE PARTICLE AGITATOR

PROBLEM TO BE SOLVED: To secure sealing property of fine particle excellent in the heat resis tance and capability to respond to any displacement of a shaft. SOLUTION: In the inside of gland packing 23 provided on shaft seal case 21, three sheets of ring-like seal plate 24 freely slidably fitted on the axially central direction are arranged at specific internals in a rotary shaft 6, seal grooves 25 to which the eternal peripheral parts of the seal plate 24 are respectively pivoted are formed on the shaft seal case 21 so that both side surfaces of this seal groove 25 may respectively make sliding contact with the inside surface and the outside surface of the seal plate 24 and simultaneously a gap 26 is formed for allowing radial displacement of the rotary shaft 6 between the bottom part of the seal grooves 25 and the outer peripheral edge of the plate 24. On the slidably moving part of this composition, swing of the rotary shaft is additionally allowed so that the powdery particulates may be also sealed.