Fluid cooled packing case member for compressors and other machinery

摘要

A packing case member or packing cup for use in a package of other similar cups for mounting on a reciprocally or rotatably movable machinery shaft to prevent gas leakage along the shaft is disclosed. The member includes a circular central opening for the shaft and provision for a conventional seal ring which slidably bears against the shaft as the shaft moves through the member. A fluid coolant passageway is formed in the member so as to extend around a majority peripheral portion of the central opening between inlet and outlet ports located at opposite end portions of the passageway. The passageway is characterized by at least three straight line segments which successively intersect one another at various angular positions around the central opening. Each straight line segment is accessible through a peripheral access opening which communicates with one end thereof for ease of cleaning debris clogging the passageway. In one embodiment, separate threaded plugs removably seal the access openings to prevent coolant leakage. In another embodiment, a circular band removably mounted over the peripheral edge of the member encloses the access openings and a pair of O-rings are confined around the periphery of the member under the band on opposite sides of the access openings to prevent coolant leakage between the periphery and the band.