Rotary engine with shaft bearing having two stiffnesses, rotary engine shaft and means of connection between a rotary engine shaft and a bearing

摘要

A shaft mounted to rotate with respect to another fixed or rotary element of a rotary engine to which the shaft is connected by at least one bearing, it being possible for the engine to operate in at least two different operating speeds, the shaft comprising a connection to the bearing that has a state of stiffness that varies with engine operating speed. The connection comprises a squirrel cage comprising at least two points of attachment, one to the bearing and one to the shaft, between which points there extends a flexible portion, the shaft comprises an actuator able to adopt at least two positions for controlling the state of stiffness of the squirrel cage, the actuator comprises a piston designed to be displaced by oil pressure in a chamber formed between the piston and shaft from a rigid state of stiffness position to a soft state of stiffness position.