Vane-Motor with Rhombic Link Drive

Abstract

Rotary motor with four vanes carried by rotor sliding in its four slots perpendicular to each other is here studied theoretically. The centrifugal effect of the vane tips sliding on the pseudo-elliptic working cylinder is neutralized by making use of a rhombic link. Two pairs of opposite links are connected by separate diametral links at their middles. These two diametral links are hinged independently on the main shaft of the rotor to secure relative position of the rhombic link as a whole to the rotor axis, allowing the configuration of the rhombic link itself as it goes. The roots of the four vanes are connected independently to the pins through the apexes of the rhombic link. These pins carry rollers to run in contact with the control cam of pseudo-ellips in shape. Some considerations are made to apply such a vane-motor to compressors, expanders and also internal combustion motors.