Device with counter-rotating propellers having a propeller pitch altering means

摘要

A device including a pair of counter rotating propellers with variable pitch which may be modified by an actuator located in a central cavity of the shafts. A system for transporting energy to the actuator includes a conduit passing into a static case in proximity to an epicycloidal gear train, and then control conduits leading to the actuator and crossing the planet carrier of an epicycloidal gear train. The junction is affected by a dynamic joint with a collector. This transport path avoids a high temperature turbine.

主权项

1. A device with counter-rotating propellers, comprising:
means for changing a pitch of the propellers; and an epicycloidal gear train transmission, between a driving turbine and the propellers; the pitch changing means comprising an actuator supplied with energy and housed in a cavity surrounded by concentric shafts connecting the epicycloidal gear train to the propellers, and a system to transport energy of a stator to the actuator; wherein the transport system comprises a supply conduit passing through a static case of the stator, the static case extending between the turbine and the epicycloidal gear train, and then a dynamic joint between one end of the supply conduit and a rotating circular collector, and finally control conduits connecting the collector to the actuator, the control conduits passing through a planet carrier of the epicycloidal gear train.