BUSHING ARRANGEMENT FOR SEAL CAVITY PROTECTION IN ROTATING FLUID EQUIPMENT

摘要

An arrangement of members for a throat bushing for rotary fluid equipment includes a first member that is useful for seal cavities that contain conventional packing, and a second bushing member that will be used in conjunction with the first bushing membe r if the seal cavity utilizes a mechanical seal at the remote end of the cavity. Both bushing members have a tight sliding fit in the seal cavity and each is provided with spiral grooves in a central bore thereof for the removal of contaminants from the seal cavity. The first bushing member can also be provided with appropriate ports for use with a flushing fluid. The distal end face of the first bushing member is contoured to receive a mating proximal end face of t he second bushing member or to also receive the abutting face of a packing ring or a lantern ring. The arrangement of the invention allows an operator to switch between the use of a mechanical seal or conventional packing without having to discard his primary seal cavi ty protector, as would be required in absence of the intention.