Foldable-fan-type rotor wing used for vertical take-off and landing of aircraft

Abstract

The invention provides a foldable-fan-type rotor wing used for vertical take-off and landing of an aircraft, and belongs to the technical field of aircrafts. The rotor wing is provided with a plurality of blades, which can be opened during take-off and landing and be folded during flight like a foldable fan. The rotor wing includes one or more rotating shafts in opposite rotating directions, each of the rotating shafts drives a plurality of shaft sleeves which are matched vertically to each other, and a plurality of the blades, each shaft sleeve connected to each blade. Each rotating shaft is connected to the lowest shaft sleeve and drives it to rotate, and successively, the lower one shaft sleeve drives the upper one shaft sleeve. One-directional matching structures are disposed on the upper and lower end surfaces of each shaft sleeve, thus forming upper and lower matching surfaces. A matching angle is formed by means of a rotatable space between the matching surfaces of the shaft sleeves. When the shaft sleeves rotate forwardly, locking driving is completed, and when the shaft sleeves rotate reversely, the shaft sleeves can freely rotate for restoration. The foldable-fan-type rotor wing can freely change the aerodynamic configuration of the rotor wing according to flight situation, thereby reducing resistance, improving lifting force, avoiding vibration, and achieving stable conversion and effective compatibility between two operation modes of vertical take-off and landing and horizontal flight. The foldable-fan-type rotor wing has cooperative mechanism, simple structure, low cost, high reliability and good adaptability, etc.

Description

technical field [0001] The invention relates to a fan-folding rotor for vertical take-off and landing of an aircraft, in particular to a fan-folding rotor that is opened during vertical take-off and landing and folded during horizontal flight, and belongs to the technical field of aircraft. Background technique [0002] Manned aircraft can be divided into two categories: fixed wing and rotary wing. Fixed wing is commonly used in horizontal take-off and landing aircraft (such as jet airliners), while rotary wing is commonly used in vertical take-off and landing aircraft (such as helicopters). As far as the technical level has been reached so far, fixed-wing aircraft can fly at high speed and are easy to operate, but they need to rely on runways to take off and land. Rotary wing aircraft can take off and land vertically without relying on runways, and has strong adaptability, but the mechanism is out of balance, the control is complicated, the flight speed is slow, and the fue...

AI Technical Summary

Problems solved by technology

(2) Low reliability

The waving of the rotor blades produces mechanical vibrations, which increases the wear of the hinges and makes the reliability always inferior to that of fixed-wing aircraft

(3) Poor roll stability

Uneven lift on both sides of the rotor can cause the rotary wing aircraft to roll, capsizing and losing control within seconds

(4) Complex manipulation

The rotor of the helicopter not only provides the maneuverability of flight, but also causes the complexity of flight control

The control load is much greater than that of fixed-wing aircraft, which increases the probability of human error

(5) Can't be bigger

The diameter and speed of the rotor are limited by the speed of the tip of the wing that cannot exceed the speed of sound. The diameter of the rotor is generally a maximum of more than ten meters. The size of the aircraft is limited and it cannot be made larger

(6) Flight mechanism disorder

Although the helicopter has been developed for nearly 70 years, the inherent coordination of the flight mechanism is poor and full of innate contradictions

For example: use the tail rotor to balance the rotor torque, use the flapping hinge and the shimmy hinge to balance the turning moment of the forward flight, the rotor area is required to be large for vertical take-off and landing, and the rotor area is expected to be small for horizontal flight, the flight mechanism of the vertical take-off and landing state and the horizontal flight state Contradictions, inability to unify, etc., directly lead to complex control of flight status and poor stability

[0004] In short, the above-mentioned defects of rotary-wing aircraft come from the contradiction between the two flight modes that the rotor needs to take into account both vertical take-off and landing and horizontal flight.

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