A kind of variable thickness composite material stator blade and its forming method

Abstract

The invention relates to a variable-thickness composite material stator blade and a molding method thereof, in particular to an integral molding technology of a variable-thickness stator blade, and belongs to the technical field of advanced composite materials. The blade includes a leading edge plate, a variable-thickness blade body, and a trailing edge plate, which are made of the same composite material and are integrally formed, and the windward surface of the blade body is protected by wear-resistant non-metal edging. The forming mold is designed as a combined mold with a closed mold cavity and a four-lobed combined module, and the modules are designed as tapered guiding and limiting mating surfaces. Combined with the extracted airfoil neutral surface and the net volume filling method, the edge contour of each prepreg layer that is consistent with the total thickness of different areas of the airfoil is simulated and designed. The blade is made of continuous fiber fabric prepreg on a 4-lobe forming mold to realize the prefabrication, and then the metal pre-embedded sleeve is embedded in the corresponding position, and the hot-pressing process is used to realize the co-curing preparation of the pre-embedded part and the blade body. The forming method ensures that the stator blade can not only meet the structural strength and rigidity requirements, but also meet the profile accuracy requirements of its aerodynamic shape.

Description

technical field [0001] The invention relates to a variable-thickness composite material stator blade and a molding method thereof, in particular to an integral molding technology of a variable-thickness stator blade, and belongs to the technical field of advanced composite materials. Background technique [0002] Resin-based composites have become a popular research material for aero-engine cold-end components due to their good specific strength and specific modulus. After decades of development, resin-based composite materials have been used in the external casing, rotor and stator blades, containing casing, engine nacelle and thrust reverser of large bypass ratio turbofan engines and small bypass ratio afterburner turbofan engines. There are important applications in the device. [0003] The stator components of aero-engines are also increasingly using fiber-reinforced resin matrix composites. For example, the PW4056 / 4168 / 4084 engine fan outlet guide vanes of P&W Company...

AI Technical Summary

Problems solved by technology

[0004] At present, domestic stator blades are made of metal, glass fiber reinforced plastic or low-performance carbon fiber composite materials, but the overall performance cannot meet the higher requirements of aero-engine stator blades. It is urgent to develop a lightweight, high stiffness, high strength and high surface accuracy. Stator blade

Although the above reports apply composite materials to the stator blades, they still cannot meet higher performance requirements (performance requirements such as large variable thickness, high stiffness, and high strength)

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