ZAHNRADPUMPE

摘要

A gear pump of the kind in which auxiliary gearing is relied upon to produce synchronized movement between intermeshed pumping gears includes one gearwheel of the auxiliary gearing mounted on a shaft means are provided for supplying hydraulic fluid under pressure to an interface between the gearwheel and the shaft so as to allow the gearwheel to be expanded hydraulically in order to effect relative angular adjustment between the gearwheel and the shaft for locating the pumping gears at their required relative angular positions.