The invention belongs to the field of helicopter design, and particularly relates to a tail-rotor-free single-rotor helicopter adopting a piston type engine and an anti-twisting method. A tail transmission system and a tail rotor blade system of a single-rotor helicopter with a tail rotor configuration are complex, and the requirement for maintenance is high. The variable-pitch fan driven by the piston type engine is used for cooling the engine, air flow generated in the cooling process is combined with air entraining of the piston type engine, and the mixed air flow is guided to the rear end of the tail beam through the tail beam. Airflow is sprayed out from one side of the vertical fin connected to the lower end of the tail beam, so that pressure difference is formed on the two sides of the vertical fin, and aerodynamic force is generated to counteract fuselage torque. By adjusting the variable pitch angle of the fan and the air entrainment amount of the engine, the airflow speed is adjusted, the airflow acting force is changed, and the course of the helicopter is controlled. The helicopter structure is simplified, the maintainability is improved, and the noise and vibration level of the helicopter are reduced. Therefore, the market competitiveness of the small single-rotor helicopter using the piston type engine is improved.

    本发明属于直升机设计领域,尤其涉及一种采用活塞式发动机的无尾桨单旋翼直升机及反扭方法。单旋翼带尾浆构型的直升机尾传动系统和尾桨叶系统复杂,对维护要求高。本发明使用由活塞式发动机带动的可变距风扇对发动机进行冷却,利用冷却过程中产生的气流,结合活塞式发动机引气,将混合后的气流通过尾梁引导至尾梁后端。将气流从连接在尾梁下端的垂尾一侧喷出,从而在垂尾两侧形成压差,产生气动力抵消机身扭矩。通过调整风扇变距角以及发动机引气量,调整气流速度,改变气流作用力的大小,实现对直升机的航向操纵。简化了直升机结构提高了维护性,降低了直升机噪声和振动水平。从而提高了使用活塞式发动机的小型单旋翼直升机的市场竞争力。


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    Title :

    Tail-rotor-free single-rotor helicopter adopting piston type engine and reverse twisting method


    Additional title:

    一种采用活塞式发动机的无尾桨单旋翼直升机及反扭方法


    Contributors:
    QI QIANQIAN (author) / SHAO JIANFENG (author) / LIU BIN (author) / ZHANG YUBING (author) / LIU ZHANZHI (author) / TIAN HAO (author) / LI QINGFENG (author) / ZHOU DAFEI (author) / LI QI (author)

    Publication date :

    2022-12-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / B64C AEROPLANES , Flugzeuge



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