Radial piston pump

摘要

The invention relates to a radial piston pump in which an eccentric (12) fixed to a drive shaft (11) drives several pistons (3) arranged in a star shape. Since a pump of this type works with so-called suction governing, the delivery spaces are only partially filled above an average speed range. Consequently, pressure surges which produce noises develop when the piston (3) strikes the oil volume to be expelled. These pressure surges can be reduced if a damping member is fitted between the pistons (3) and the eccentric (12). An annular corrugated spring (16), for example, can be fitted as damping member between an inner and an outer sliding ring (14 and 16 resp.). This corrugated spring (16) allows the piston to deflect slightly at the start of the pressure stroke, so that pressure peaks are reduced. <IMAGE>