FLUSH COOLING OF SHAFT SEALING SCREW MEANS

摘要

In certain shaft seals using a viscoseal-type sealing screw such as those adjacent the pressurized screw pump section of a viscous liquid devolatilizer, excessive heat buildup and/or prolonged elevated temperature exposure in the seal region can either deteriorate the liquid materials in the sealing screw or render such liquids less viscous to an extent such that the seal is no longer fully operative. To cool and flush the sealing screw and the liquid materials therein, a fluid conduit bringing fresh liquid material continuously to the sealing screw from the adjacent pressurized section is provided.