Importance

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Abstract

A rotary machine with orbiting twin blades, especially for expansion drive units and compressors, includes a stator housing bounding an internal chamber, a rotor part received in the chamber for rotation and including at least two entraining rings axially spaced from one another and at least four entraining bars interconnecting the entraining rings and defining respective slots between themselves. A carrier shaft is mounted in the internal chamber for rotation and carries for joint rotation therewith at least two pairs of eccentric members. At least two twin blades are each supported on one of the pairs of eccentric members for relative turning therebetween and each includes two blade portions passing through oppositely located associated ones of the slots into close proximity of the inner peripheral surface of the stator housing. A transmission is provided that transmits torque between the rotor part and the carrier shaft in a permanent 1:2 transmission, causing the carrier shaft to rotate in the same direction as but at double the speed of the rotor part and causing the eccentric members mounted thereon to force the twin blades to follow the inner surface of the stator housing still at the aforementioned close proximity thereof.

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First Claim