Axial flow fluid compressor with oldram coupling

摘要

A compressor includes a cylinder, and a rotating body located in the cylinder. A spiral groove is formed on the outer periphery of the rotating body. A spiral blade is fitted in the groove and divides the space between the inner periphery of the cylinder and the outer periphery of the rotating body into operating chambers which have volumes gradually decreasing with distance from one end of the cylinder. A drive motor rotates the cylinder and the rotating body relative to each other. The drive motor includes a cylindrical stator fixed on a closed casing and a rotor mounted on the cylinder and situated inside the stator coaxially, with a motor air gap provided therebetween. A main bearing is engaged with the axial end portion of the cylinder and fixed on the inner wall of the casing by means of a fixing member situated radially more inward than the stator. The main bearing is fixed on the closed casing, with the position of the main bearing adjusted by a master rotor.