Multistage high pressure compressor

摘要

A multistage compressor (10) is driven by a rotary electric motor (20). The rotor (25) is fixed to the lower end of the rotating shaft (23) by a bolt (34) screwed into the shaft (23). To secure the rotor (24) against rotary movement relative to the shaft, a detent key (35) is provided in a groove of the rotor. The rotor is secured against axial displacement by a stepped flywheel (40) for suppressing torque fluctuations and providing stable operation of the compressor. The flywheel may be locked against rotary displacement by the same detent key (35,45A) which is used for the rotor or alternatively by shrink-fitting. The cylinder (71) space is sealed against leakage by O-ring seals arranged in chamfers (90) on the outer circumference of the cylinder liner (71). <IMAGE>