ROTARY POSITIVE-DISPLACEMENT FLUID MACHINES

摘要

A rotary positive-displacement fluid machine comprising a rotor (12) eccentrically mounted in a casing (14, 15) for rotation about an axis (30), the rotor having recesses (33) respectively receiving vanes (21) which oscillate in the recesses as the rotor rotates. Each vane (21) is connected by a crank (27) to an arm (28) for oscillation about a vane axis (35) which is located inwards of the outer extremity of the tip which itself has a clearance fit within the casing (14, 15). The tip of each vane is preferably curved about a vane axis (35). The machine may be connected to the crankshaft of an internal combustion engine and driven by the pressure difference between the ambient air and that at the engine inlet manifold. Alternatively the device may operate as a heat pump.