Patent ID: 9222481
Filing Date: 2015-12-29
Classification: F04D

Abstract:
1. A motor compressor unit, comprising: a motor for driving a compressor, wherein the motor and the compressor are mounted in a common housing, the housing being sealed against gas to be compressed, the compressor comprising a first rotor having a main shaft with at least one hollow portion with an open end free of contact facing the motor; a connecting shaft coaxial with the main shaft, extending axially between the motor and the compressor, placed at least partially within the hollow portion of the main shaft, and rotatably connecting a second rotor of the motor to the first rotor; and a single coupling zone at one end of the connecting shaft, arranged between the main shaft and the connecting shaft, the coupling zone enabling the connecting shaft to rotate and drive the main shaft, wherein a free portion of the connecting shaft extends between the coupling zone and the motor, and traverses the hollow portion of the main shaft so as to leave a radial space between the main shaft and the connecting shaft along the hollow portion and an axial space between said open end and a motor end of the connecting shaft.