Patent ID: 8834119
Filing Date: 2014-09-16
Classification: B63H,B64C,B64D,F01D,F05D,Y02T

Abstract:
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.