RECIPROCATING PISTON COMPRESSOR DRIVEN BY A LINEAR ELECTRIC MOTOR

摘要

1323859 Reciprocating gas compressors ATLAS COPCO A B 16 March 1972 [17 March 1971] 12411/72 Heading F1N An electric driven reciprocating compressor has a piston or diaphragm reciprocating assembly comprising a pumping piston 10, an armature 6 and a non-pumping auxiliary piston or diaphragm piston 11, the pumping piston 10 being driven on its suction stroke by the attraction of the armature 6 towards a coil assembly 4 fed with a pulsed electric supply and on its compression stroke by gas in an auxiliary cylinder 20 acting on the piston 11, Gas is supplied to the auxiliary cylinder 20 from the pumping cylinder 14. The supply is either directly from the cylinder through a passage 31 containing a non-return valve 33 or from a line connected downstream of the delivery valve 16, the line containing a non-return valve (22) or being uncovered by the auxiliary piston 11 when the pumping piston is near the end of the compression stroke. A spring-loaded piston 34 or a spring (39) positions the armature displaced from the coil assembly prior to starting. The pulsed electric supply is produced by feeding A.C. through a half-wave rectifier. Gas enters the pumping cylinder'through an automatic valve 15 or ports (36) uncovered by the piston 10.