Rotary fluid device performing compression and expansion of fluid within a common cylinder

摘要

A rotary fluid device includes a cylinder having an annular cylinder chamber and an annular piston, which is disposed in the cylinder chamber to be eccentric relative to the cylinder. The annular piston divides the cylinder chamber into an outer working chamber and an inner working chamber. A blade is disposed in the cylinder chamber to partition each of the working chambers into a high-pressure space and a low-pressure space. The cylinder and the piston relatively rotate. The outer working chamber constitutes a compression chamber which compresses and discharges a sucked fluid with the progress of the relative rotation of the cylinder and the piston. The inner working chamber constitutes an expansion chamber which expands and discharges a sucked fluid with the progress of the relative rotation of the cylinder and the piston.