Radial piston pump - has pistons with increased cross section at seal with flat base against eccentric intermediate

摘要

A radial piston pump (1) has an inner chamber (3) located centrally in the pump housing (2) with an eccentric shaft (4), which operates the pistons (7) radially via an intermediate element (8) and against spring (6) force. The pistons have an increased cross section (15) towards the cylinder wall in the region of the piston seal (9). Each piston takes the form of a cylinder with a flat base (13) sitting on the intermediate element, this element having a flat contact surface (17,27) for each piston base. ADVANTAGE - Good efficiency, low wear at sealing faces.