Rotor wing prefabricated part, self-rotating rotor wing and forming method

Abstract

The invention discloses a rotor wing prefabricated part, a self-rotating rotor wing and a forming method. The forming method of the rotor wing prefabricated part comprises the following steps that glass fiber prepreg is provided; the glass fiber prepreg is softened to obtain a prepreg softened material; and a mold is filled with the prepreg softened material, the prepreg softened material is semi-cured and formed, and the rotor wing prefabricated part is obtained. By obtaining the rotor wing prefabricated part made of a semi-cured-body glass fiber composite material, in the the following process of forming the rotor wing prefabricated part with a skin, a girder belt and other parts to obtain the self-rotating rotor wing, the obtained self-rotating rotor wing has excellent integrity, centrifugal loads can be well transmitted in the working process, and therefore the balance, the stability, the strength and the service life of the self-rotating rotor wing are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of autorotors, and in particular relates to a rotor prefabricated part and a forming method thereof, and also relates to an autorotor comprising the rotor prefabricated part and a forming method of the autorotor. Background technique [0002] Autogyro, referred to as autogyro, is a kind of rotorcraft, between airplanes and helicopters. Its design varies, but most of the basic elements of the design are the same, usually including: fuselage, power plant, rotor system, empennage and landing gear five parts. When the autogyro works, the tail rotor is generally used to provide power to advance, and the tail rudder is used to control the direction. Its rotor is not driven by a power device, and it only relies on the relative airflow when it advances to blow the rotor to rotate to generate lift. [0003] Among them, the rotor is an important part that provides the necessary lift and control ability for autogyro f...

AI Technical Summary

Problems solved by technology

[0004] The rotor of the autogyro is generally made into prefabricated parts or filler blocks in advance, and then the subsequent molding is carried out. Specifically, the traditional rotor blade is made of uncured parts such as skins and girder belts and cured parts. The rotor prefabricated parts, counterweights, blade root caps, dynamic balance lead pipes and foam fillers are put into the mould, heated and pressurized for one-time molding. Although this method reduces the number of parts of the rotor blade and improves the molding efficiency , but the integrity of its structure is still not good, especially after a long flight, due to the poor integrity, the reliability of force transmission performance is reduced, which affects the balance and stability of the autogyro

[0005] In view of the above problems, in the production process of the rotor, the adhesive film is generally used to improve the integrity and tightness of the autorotating rotor. However, the use of the film has many disadvantages: first, it increases the production cost; second, it affects the quality of the rotor. The quality control of the raw materials in the rotor is related to the quality of the blade molding, so it is necessary to strictly control the quality of the raw materials. Quality, if the quality of other raw materials remains unchanged, increasing the film will increase the mass of the rotor, which will affect the flying height and speed of the autogyro; if the quality of the rotor is strictly controlled, increasing the film will reduce the quality of other raw materials , will inevitably affect the strength of the rotor and reduce the fatigue life of the rotor; the third is that the autogyro generally requires a flight altitude of about 100-5000m, and the commonly used flight altitude is 3000-5000m. The membrane is prone to brittle cracks, which affects the balance and stability of the rotor

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