PISTON FOR RECIPROCATING COMPRESSORS, IN PARTICULAR FOR HYDROGEN GAS5 AND RELATING RECIPROCATING COMPRESSORS

摘要

A piston (11) for reciprocating compressors is provided in its outer surface with at least a first annular slot (22) filled with hydraulic fluid. At least a second annular slot (25), also provided in its outer surface is apt to collect the hydraulic fluid possibly escaping from said first annular slot and lead it towards a fluid circuit (26, 29). Proper apertures (28, 30) for the communication of said annular slots with said fluid circuit are provided in the surface of the cylinder (12) housing said piston.