Series-parallel tilting drive mechanism of tilt rotor aircraft

Abstract

The invention discloses a series-parallel tilting drive mechanism of a tilt rotor aircraft, belonging to the technical field of helicopter manufacturing. The series-parallel tilting drive mechanism of the tilt rotor aircraft is formed by installing and connecting a swing engine, middle swing belt wheels, swing driving belts, a rotary engine, wing rotary belt wheels, rotary driving belts and a two-degree-of-freedom turning mechanism. The hybrid tilting drive mechanism is scientific and rational in structural design and capable of being applied to the tilt rotor aircrafts; the tilt rotor aircraft has vertical / short-distance taking-off and landing capacity; the tilt rotor aircraft has the advantages of low oil consumption, high speed, large air range, high load and the like, and the transportation cost of the tilt rotor aircraft is only half of that of helicopters.

Description

technical field [0001] The invention relates to a hybrid tilting drive mechanism of a tilting rotor aircraft, which belongs to the technical field of helicopter manufacturing. Background technique [0002] The more successful tiltrotor aircraft is the American V22 "Osprey". It installs the engine and rotor for tilting motion at the wing tip, and adjusts the flight state of the aircraft by tilting the rotor. When the axis of the propeller is horizontal, it will Give the aircraft a forward pull; when the propeller axis is vertical, it provides an upward lift to the aircraft. [0003] The American V22 "Osprey" has the following disadvantages: 1) The wing stiffness is weak, and it is easy to flutter. , it is easy to cause flutter, which limits the further improvement of flight speed; 2) the lateral stability is relatively poor. In the flight state, the lateral stability is relatively poor; 3) The lift force is greatly weakened. In order to ensure sufficient lift force in level...

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Problems solved by technology

[0003] The American V22 "Osprey" has the following disadvantages: 1) The wing stiffness is weak, and it is easy to flutter. , it is easy to cause flutter, which limits the further improvement of flight speed; 2) the lateral stability is relatively poor. In the flight state, the lateral stability is relatively poor; 3) The lift force is greatly weakened. In order to ensure sufficient lift force in level flight, the area of ​​the V22 wing must be large enough, but in order to avoid the weak stiffness caused by the too long cantilever under the force of the wing, the V22 The wings can only be thick and short. During the take-off phase, the rotor downwash airflow is seriously blocked by the wings, which greatly weakens the propeller lift.

The tilt-wing helicopter with the application number 201010599982.2 uses a parallel mechanism to construct the tilt-rotor drive mechanism, which can improve the aeroelastic stability of the aircraft by increasing the stiffness of the wing. However, since the parallel mechanism is installed on the wing, the parallel mechanism directly drives of the rotor relative to the wing X The direction (the direction the aircraft is heading) cannot be flexibly arranged according to aerodynamics, which is not conducive to further reducing the influence of rotor downwash on lift

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