Axial multiple piston unit - has rotating light-metal cylinder block with hard coated piston bearing surfaces in cylinders and/or on port face

摘要

The axial piston unit comprises a rotating cylinder block (1) in light metal or a light metal alloy contg. a number of cylinders (10) with reciprocating pistons (7) connected with a drive flange via connecting rods (6). The piston bearing surfaces (4) of the cylinders and/or the ported end face (5) of the cylinder block has a hard coating. The pistons may be of light metal or a light metal alloy and have their bearing surfaces (8) hard coated. The bearing surfaces may be coated by a galvanic bronze deposite.