Low Noise, Increased Reliability, Digital Control: A New Generation of Radial Piston Pumps

Low noise, greater reliability, easy control options are demands on modern piston pumps. To lower both, the noise emission and the high and low pressure pulsation the number of pistons of a radial piston pump (RKP) is increased from 7 to 9. By means of CFD and FE calculation the suction path of the RKP is optimized as a compromise between hydraulic (low pressure drop, small inductivity) and mechanic (small deformation, low stresses) functionality. Pressure drop along the suction path was reduced by 20%. The sound emission of the new radial piston pump generation was reduced by up to 5dB (A) in sound power, that corresponds to a reduction of wide more than 50%. A new stroke ring design eliminates a possible place of wear. The DCP (Digital Interface Pump) is a new servo radial piston pump adjustment based on a new pilot valve with digital onboard electronics offering an enhanced functionality.