FIELD: aircraft engineering.
SUBSTANCE: invention relates to aircraft engineering, particularly, to propeller pitch changing devices. Turbo machine (1) comprises propeller pitch changing system (23) containing linear action circular control hydraulic power cylinder (25) and connection mechanism (26), connecting power cylinder with propeller blades to change their orientation. System circular power cylinder (25) is rigidly connected with fixed housing (13) on which said propeller is retained, and is internal relative to blades installed in propeller external rotary bushing (14). Connection mechanism (26) has movement transmission bearing (31), attached with one side to power cylinder movable part and interacting, from other side, with mechanism (26) connection means (32) to propeller blades.
EFFECT: higher air-tightness, reduced overall dimensions with guaranteed reliability during operation.
14 cl, 3 dwg
