Axial flow fluid compressor

A fluid compressor comprising:

• a cylinder having a suction-side end and a discharge-side end;
• a columnar rotating body located in the cylinder to extend in the axial direction thereof and be eccentric thereto, and rotatable relative to the cylinder while part of the rotating body is in contact with the inner peripheral surface of the cylinder, said rotating body having a spiral groove on the outer peripheral surface thereof, said groove having pitches narrowed gradually with a distance from the suction-side end to the discharge-side end of the cylinder;
• a spiral blade fitted in the groove to be slidable, substantially in the radial direction of the rotating body, having an outer surface in tight contact with the inner peripheral surface of the cylinder, and dividing the space between the inner peripheral surface of the cylinder and the outer peripheral surface of the rotating body into a plurality of operating chambers;
• a pair of bearings for rotatably supporting both ends of the cylinder and rotatably supporting corresponding ends of the rotating body so as to hold the rotating body at a predetermined position with respect to the cylinder;
• drive means for relatively rotating the cylinder and the rotating body so as to sequentially transporting a fluid, which is drawn into the cylinder from the suction-side end thereof, toward the discharge-side side of the cylinder through the operating chambers;
• a closed case for housing said constituent members;
• and
• support means for supporting one of said bearings so as to be movable in the radial direction of the cylinder relative to the case.