System of variable stator vanes for a turbine engine
The invention relates to a system of vanes with adjustable orientation, also called a system of variable stator vanes, for a low-pressure compressor of an axial turbine engine. The system comprises vanes, each having a vane extending radially in a flow of the turbine engine and a spindle having a cylindrical portion connected to a telescopic actuating lever. The cylindrical portion comprises radially extending slot, and the actuating lever comprises a pivot joint housed in the slot, that is configured to communicate a rotary movement to the vane about its spindle. The invention also proposes a compressor and a turbine engine.
1. A system for an axial compressor of a turbine engine, said system comprising:
a telescopic actuating lever having a portion of reduced thickness;
a variable stator vane with a vane body designed to extend radially in a flow of the turbine engine;
a spindle having a cylindrical portion comprising a radially extending slot, the slot extending along an entire diameter of the cylindrical portion so that the spindle forms a fork which when seen in an axial direction has a U shape, the slot receiving the portion of reduced thickness; and
a rod passing through the portion of reduced thickness so as to form a pivot joint between the portion of reduced thickness and the spindle, the telescopic actuating lever being configured to communicate a rotary movement to the variable stator vane around its spindle.
2. The system according to claim 1 , wherein the slot comprises inner surfaces in contact with the pivot joint of the lever.
3. The system according to claim 1 , wherein the spindle comprises a radial end, the pivot joint being positioned radially between the vane body and the radial end.
4. The system according to claim 1 , wherein the spindle has a constant diameter over its height.
5. The system according to claim 1 , wherein the telescopic actuating lever comprises opposed lateral surfaces that are in contact with the slot.