Shrouded rotary assembly from segmented composite for aircraft

A manufacturing method for making a stator hollow structure for a shrouded propulsion rotary assembly for an aircraft, the stator hollow structure comprising at least:

• a central hub casing for a stator gearbox of the stator hollow structure, an external hollow duct surrounding the central hub casing and between the central hub casing and the external hollow duct, at least three profiled guide vanes, each profiled guide vane forming a fixed blade supporting the central hub casing;
• each profiled guide vane having a radial shank location and a radial tip location;
• each radial shank location being fixedly attached to the central hub casing and each radial tip location being fixedly attached to the external hollow duct;
• wherein the manufacturing method comprises the steps of:
• in a preparing step, preparing separately from components of composite material at least three composite angular segments, so that each composite angular segment comprises:
• a core arched section of the central hub casing, a peripheral rim section of the external hollow duct and, between the core arched section and the peripheral rim section, a pair of angularly opposed sliced portions respectively for one profiled guide vane;
• and
• in a finalizing step, finalizing the stator hollow structure from the composite angular segments once prepared;
• the finalizing step forming a unitary piece encompassing an overall shape of the stator hollow structure though a securing stage of forming the stator hollow structure in a unitary one-piece encompassing the overall shape;
• the securing stage providing securing together the continuously integrated composite angular segments.