Reciprocating compressors and methods for separating fluids, particularly oil

The invention relates to a reciprocating compressor having a housing (1) enclosing a drive chamber (10) and a compressor chamber (20) and one to the drive chamber (10) open gas inlet (11) which is coaxial to a machine shaft (2) into a separation unit (31) opens, which is arranged within a cylindrical separation chamber (30) and at least one, with the machine shaft (2) rotationally fixed to the annular flange (32) carrying a plurality of separating plates (33) extending substantially radially and parallel to the machine shaft (2) extending into the deposition chamber (30), and wherein between the separating plates (33) and an inner circumferential wall (35) of the separation chamber, a gap (36) is provided for discharging separated oil. Furthermore, the invention relates to a method for separating oil from a gas-oil mixture.