TURBOMACHINE PROVIDED WITH AN ASSEMBLY FOR CONTROLLING THE PITCH VARIATION OF A PROPELLER

摘要

The assembly (25) links a static housing (24) of the turbomachine, into which supply lines, in particular fluid supply lines (23), arrive, to the blades of the propeller, and comprises: —a system for controlling fluid pitch (27), rigidly connected to the static housing (24), capable of being linked to the supply lines, —a linear actuator (28) having two chambers separated by a piston (71) of which the sliding is dictated by the control system and allows the blades to rotate, and —two concentric tubes (36, 37) housed in the planetary shaft of the epicyclic reduction gear and linking the system (27) to the actuator (28) by delimiting two fluid passages (45, 48) linked, respectively, with the two chambers (72, 73) of the actuator.

主权项

1. Turbine engine having an epicyclic reduction gear driven by a planetary shaft connected to a power turbine of said turbine engine, having a fluid control assembly for varying the pitch of a downstream propeller of the turbine engine, said assembly connecting an upstream static casing of the turbine engine, into which fluid and electrical supply lines arrive, to the blades of the downstream propeller, characterised in that it comprises from upstream to downstream a system for controlling fluid pitch secured to the static casing, determining the setting of the blades of the downstream propeller and capable of being connected to the supply lines, then a linear actuator having two chambers separated by a piston of which the sliding is dictated by the control system and allows the blades to rotate, said system being connected to the actuator by means of two sliding concentric tubes secured to the piston, housed in the planetary shaft of the epicyclic reduction gear and delimiting two fluid passages connected respectively to the two chambers of the actuator.