阅读说明：本技术 一种电动飞机涵道风扇机翼上表面吹气增升装置 (Electric aircraft duct fan wing upper surface blowing and lift increasing device ) 是由 葛晨辉 于 2021-10-27 设计创作，主要内容包括：本发明公开了一种电动飞机涵道风扇机翼上表面吹气增升装置,包含机翼涵道,所述襟翼转动安装在机翼涵道的出口处；所述的机翼涵道的内侧被连接壁板等间距分割为多个腔体,每个腔体内部均设置有风扇本体和桨毂及电机座；所述的风扇本体与桨毂及电机座转动连接。涵道风扇上表面吹气增升装置在涵道出口后布置襟翼,在巡航时襟翼收起减小巡航阻力。在悬停及低速飞行时,襟翼放下,由于柯恩达效应,由涵道风扇吹出的高速气流会沿襟翼上表面流动而不产生分离,气流偏转后改变推力产生的方向。襟翼上表面气流由于襟翼偏转被进一步加速,形成低压区产生垂直风扇轴线的额外升力。当飞机以较低速度前进时,使用吹气增升装置的涵道攻角较小,对风扇工作有利。(The invention discloses a blowing and lift-increasing device for the upper surface of a wing of an electric aircraft ducted fan, which comprises a wing duct, wherein a flap is rotatably arranged at an outlet of the wing duct; the inner side of the wing duct is divided into a plurality of cavities by connecting wall plates at equal intervals, and a fan body, a propeller hub and a motor base are arranged in each cavity; the fan body is rotationally connected with the propeller hub and the motor base. The air blowing and lift increasing device on the upper surface of the ducted fan is provided with a flap behind the outlet of the ducted fan, and the flap is retracted to reduce the cruising resistance during cruising. When the aircraft is hovering and flying at low speed, the flap is put down, and due to the coanda effect, high-speed airflow blown by the ducted fan flows along the upper surface of the flap without separation, and the direction of thrust generation is changed after the airflow deflects. The flap upper surface flow is further accelerated due to flap deflection, creating a low pressure zone that generates additional lift perpendicular to the fan axis. When the airplane advances at a lower speed, the angle of attack of the duct using the blowing high lift device is smaller, which is beneficial to the work of the fan.)

1. The utility model provides an electronic aircraft duct fan wing upper surface blows high lift device which characterized in that includes:

the wing duct (1), the flap (2) is rotatably installed at the outlet of the wing duct (1);

the inner side of the wing duct (1) is divided into a plurality of cavities by a connecting wall plate (a) at equal intervals, a fan body (3), a hub and a motor base (4) are arranged in each cavity, and the fan body (3) is rotationally connected with the hub and the motor base (4).

2. An electric aircraft ducted fan wing upper surface blowing high lift device based on claim 1 is characterized in that: the working principle of the blowing high-lift device is as follows: the upper surface blowing high lift device is provided with a flap (2) behind the outlet of the wing duct (1), when cruising, a motor and other driving devices are opened, the driving flap (2) is retracted, the flap (2) is rotated at the rear side of the wing duct (1), the cruising resistance is reduced, when hovering and flying at low speed, the flap (2) is put down, due to the coanda effect, high-speed airflow blown out by a fan body (3) in the wing duct flows along the upper surface of the wing duct (1) without separation, and the direction of thrust generation is changed after the airflow deflects;

the airflow on the upper surface of the wing flap (2) is further accelerated due to the deflection of the wing flap (2) to form a low-pressure area to generate an additional lift force vertical to the axis of the fan body (3), the resultant force generated by the wing duct (1) is not parallel to the axis of the wing duct (1) any more due to the change of the thrust direction of the wing duct (1) and the additional lift force generated by the wing flap (2), an included angle is formed between the fan surface of the wing duct (1) and the ground when the airplane is suspended and stopped, and when the airplane advances at a lower speed, the attack angle of the wing duct (1) using the blowing lift-increasing device is smaller, so that the blowing lift-increasing device is beneficial to the work of the fan body (3).

Technical Field

The invention relates to the technical field of short-distance or vertical take-off and landing of electric airplanes, in particular to a blowing and lift-increasing device for the upper surface of a duct fan wing of an electric airplane.

Background

The existing electric airplane adopts a power steering/vertical thrust mode for short-distance and vertical take-off and landing. The power steering/vertical thrust refers to that when the airplane takes off and lands, the surface of the culvert/propeller disk deflects downwards and directly generates lift force by the reaction of the thrust. Therefore, there are the following problems: 1, low efficiency; 2, the mechanism is complex; 3, separating the airflow of the lower duct lip at a large attack angle. In order to overcome the above drawbacks, improvements are needed.

Disclosure of Invention

The invention aims to provide a blowing and lift-increasing device for the upper surface of a wing of a ducted fan of an electric airplane, which aims to solve the problem that the conventional electric airplane provided by the background technology has low efficiency in the short-distance or vertical take-off and landing process; the mechanism is complex; the airflow separation of the lower duct lip at a large attack angle and the like.

In order to achieve the purpose, the invention provides the following technical scheme: an electric aircraft ducted fan wing upper surface blowing high lift device, comprising: the wing duct is rotatably arranged at an outlet of the wing duct;

preferably, the inner side of the wing duct is divided into a plurality of cavities by connecting wall plates at equal intervals, and a fan body, a hub and a motor base are arranged in each cavity.

Preferably, the fan body is rotatably connected with the hub and the motor base.

Compared with the prior art, the invention has the beneficial effects that: the air blowing and lift increasing device on the upper surface of the ducted fan is provided with a flap behind the outlet of the ducted fan, and the flap is retracted to reduce the cruising resistance during cruising.

When the aircraft is hovering and flying at low speed, the flap is put down, and due to the coanda effect, high-speed airflow blown by the ducted fan flows along the upper surface of the flap without separation, and the direction of thrust generation is changed after the airflow deflects.

The flap upper surface flow is further accelerated due to flap deflection, creating a low pressure zone that generates additional lift perpendicular to the fan axis.

Because the thrust direction of the duct is changed and the extra lift force is generated by the flap, the resultant force generated by the duct is no longer parallel to the axis of the duct, and when the ducted body hovers, the fan surface of the duct forms an included angle with the ground. When the airplane advances at a lower speed, the angle of attack of the duct using the blowing high lift device is smaller, which is beneficial to the work of the fan.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal cross-section of the present invention;

FIG. 3 is a schematic view of the flap cruise and hover state configuration of the present invention.

In the figure: wing duct 1, wing flap 2, fan body 3, propeller hub and motor cabinet 4.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an electric aircraft ducted fan wing upper surface blowing high lift device, comprising: the wing duct 1 is provided with a flap 2 which is rotatably arranged at the outlet of the wing duct 1;

preferably, the inner side of the wing duct 1 is divided into a plurality of cavities by a connecting wall plate a at equal intervals, and a fan body 3, a hub and a motor base 4 are arranged in each cavity.

Preferably, the fan body 3 is rotatably connected with the hub and the motor base 4.

As shown in the attached figures 1-3, the upper surface air-blowing high-lift device arranges a flap 2 behind the outlet of the wing duct 1, when cruising, a driving device such as a motor is opened, the driving flap 2 is retracted, the flap 2 rotates at the rear side of the wing duct 1, the cruising resistance is reduced, when hovering and flying at a low speed, the flap 2 is put down, due to the coanda effect, high-speed airflow blown out by a fan body 3 in the wing duct flows along the upper surface of the wing duct 1 without separation, and the direction of thrust generation is changed after the airflow deflects;

the upper surface air flow of the wing flap 2 is further accelerated due to the deflection of the wing flap 2 to form a low-pressure area to generate extra lift force vertical to the axis of the fan body 3, the resultant force generated by the wing duct 1 is not parallel to the axis of the wing duct 1 due to the change of the thrust direction of the wing duct 1 and the extra lift force generated by the wing flap 2, when the aircraft hovers, the included angle is formed between the fan surface of the wing duct 1 and the ground, and when the aircraft moves forwards at a lower speed, the attack angle of the wing duct 1 using the blowing lift-increasing device is smaller, so that the blowing lift-increasing device is beneficial to the work of the fan body 3.

The details which are not described in the present specification belong to the prior art known to those skilled in the art, the standard parts used in the present invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the drawings, the specific connection mode of each part adopts the conventional means of bolts, rivets, welding and the like mature in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, and the details are not described herein.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.