Lining-free gear pump with inner toothing

摘要

An inner toothed hollow gearwheel (3) circulates in the housing (1). There is a rotary pinion (2), whose teeth define a suction and a pressure chamber on one hand by engaging the tooth gaps of the hollow gearwheel, and on the other hand by sealed contact with the tooth heads of the gearwheel. The circulating hollow gearwheel is mounted in a bearing ring (4), which is movable in the direction of suction chamber, transversely to its axis. However it is not rotatable about its axis. Its pressure chamber allocated outer peripheral surface is acted on by a pressure field (72), flow-coupled to the pressure chamber.