Self supported rotary joint for rotary drying, or cooling drum has shear pins between joint body head and nipple outer end to prevent excess torque being applied to joint body head in event of bearings freezing up

摘要

The rotary joint is supported on the drum structure by a rotating bearing housing whose bearings support the stationary nipple (66). The nipple supports the stationary rotary joint body head, and the stationary syphon support tube (36) which supports the stationary syphon structure inside the drum. The joint body head is mounted on the nipple outer end by frangible shear pins (90) to prevent excessive torque being imposed on the joint body head. The support tube serves as a thermal steam sleeve between the steam and bearing to reduce bearing temperatures, and the bearings are axially located by a spring, keeping the bearing's position within the bearing housing regardless of thermal expansion.