PUMPING AGGREGATE FOR FEED PUMPS

摘要

In order to increase the delivery pressure of pumping aggregates of feed pumps having a high pumping capacity there are provided stacks of thin spacer discs on either side of a sealing ring sealingly engaged in a sealing position between the plunger and the cylindrical bush, said stacks of spacer discs being axially movable along the plunger in the normal non-sealing position. Appropriately, a pressure distributing bush is disposed between that stack of spacer discs which faces the free end face of the plunger and the sealing ring, said pressure distributing bush rapidly compensating the pressure between said stack of spacer discs and the end face of the pressure distributing bush facing the sealing ring.