KR102025886B1 - Ducted fan - Google Patents

Abstract

According to one embodiment of the present invention, a ducted fan includes: a duct having a hollow; a central shaft penetrating the center of the hollow; a rotating rotor rotating around the central shaft; a plurality of blades rotationally installed at a radially spaced position along an edge circumference of the rotating rotor; a blade control plate movably installed in the longitudinal direction of the central shaft and rotationally installed with the rotating rotor; and a plurality of blade rotating links respectively connected to the plurality of blades from the radially spaced position along the circumference of the blade control plate.

Description

Ducted Fans {DUCTED FAN}

The present invention relates to a ducted pan.

A high-speed vertical takeoff and landing vehicle refers to a vehicle capable of taking off and landing in place without sliding and capable of stationary flight and high speed flight in the air. Unlike conventional fixed wing aircraft, there is no restriction on runway distance and it has the advantage of being able to fly faster than rotorcraft, and various types of high speed vertical takeoff and landing aircraft such as tilt rotor, coaxial reversing rotor, and ducted fan have been developed. To control the ducted fan thrust of the ducted fan type takeoff and landing vehicle, there is a method of changing the rotational speed of the blade and controlling the lift generated by the blade by controlling the pitch angle of the blade.

In the combined aircraft that implements the vertical thrust and the forward thrust in one engine, the shafts of the plurality of fans and the propeller for forward flight are connected through a single power train. Power train is required.

In the pitch angle control method, the fan rotation is driven by the engine, and the blade pitch control is implemented by a separate actuator, so each fan can be controlled independently. At this time, if the pitch angle of the blade is excessively increased to adjust the pitch thrust, there is a disadvantage that a stall phenomenon may occur due to flow separation at the blade end.

On the other hand, in the forward flight of a vertical takeoff and landing vehicle, the upper and lower surfaces of the ducted fan attached to the wing or the fuselage should be covered to reduce the drag caused by the ducted fan. To cover the top surface, apply a circular plate that can cover the entire surface of the ducted pan at once, and rotate it to cover the hinge, divide and rotate the circular plate into semi-circular plates, and thin and elongate A method of covering and installing several vanes of the form is used. The vane method is mainly used as a method of covering the lower surface, and the vane method has an advantage of generating a moment to control the attitude of the vehicle by adjusting the direction of flow through the ducted fan.

As such, the lower cover may serve as an additional function as well as the cover, whereas the upper cover applied in the prior art merely performs the function of the cover. In order to implement a simple function, an additional structure such as a cover structure, a rotating structure, and a separate driving device is required, thereby reducing the efficiency of the system.

The background art described above is possessed or acquired by the inventors in the derivation process of the present invention, and is not necessarily a publicly known technology disclosed to the general public before the application of the present invention.

The purpose of one embodiment is to provide a ducted pan.

Ducted fan according to an embodiment includes a duct having a hollow; A central shaft passing through the center of the hollow; A rotary rotor rotating around the central shaft; A plurality of blades rotatably installed at radially spaced positions along an edge of the rotary rotor;

A blade adjustment plate installed to be movable in the longitudinal direction of the central shaft and rotatably installed like the rotary rotor; And a plurality of blade pivot links connected to each of the plurality of blades from radially spaced positions along the circumference of the blade adjusting plate.

The blade may include a blade end rotatably installed with respect to the rotary rotor to cut off air; And a blade pivot connecting portion connected to one side of the blade end and rotatably connected to an upper end of the blade pivot link, wherein the pivot shaft between the blade pivot link and the blade pivot link is the rotary rotor and the blade. It may be formed spaced apart in parallel with the rotation axis between the ends.

A ducted fan according to an embodiment includes a plate driving unit for moving the blade adjusting plate in the longitudinal direction of the central shaft; A speed sensor for measuring a rotation speed of the rotary rotor; A vertical thrust detection sensor measuring vertical thrust output from the ducted fan; And a controller configured to control the position of the blade adjusting plate based on the rotational speed of the rotational rotor measured by the speed sensor to control the driving of the rotational rotor and the plate driving unit and output a vertical thrust having a desired size. It may further include.

A ducted fan according to an embodiment includes a plurality of covers rotatably installed at radially spaced positions along a circumference of an upper end of the central shaft; A cover adjusting plate which is installed to be movable in an up and down direction with respect to the center shaft, and which does not rotate; And a plurality of cover pivot links connected to each of the plurality of covers from positions radially spaced apart at regular intervals along the circumference of the cover adjustment plate.

The cover may be rotatably installed with respect to the central shaft, the cover end to selectively shield the upper portion of the hollow; And a cover pivotal connecting portion connected to one side of the cover end and rotatably connected to an upper end of the cover pivotal link, wherein the pivot shaft between the cover pivotal link and the cover pivotal connection is the central shaft and the cover. It may be formed spaced apart in parallel with the rotation axis between the ends.

The blade adjustment plate may be rotatably coupled to the upper side of the cover adjustment plate.

When the blade adjusting plate and the cover adjusting plate move in one direction parallel to the direction of the central shaft, the plurality of blades rotate so as to increase an angle formed from a plane parallel to the central shaft, and at the same time, the plurality of blades The plurality of covers may be rotated such that an angle formed from a plane parallel to the central shaft is reduced, and the blade adjusting plate and the cover adjusting plate move in the other direction opposite to the one direction; Is rotated such that an angle formed from a plane parallel to the central shaft is reduced, and the plurality of covers can be rotated such that an angle formed from a plane parallel to the central shaft is increased.

The radius from which the plurality of covers protrude from the central shaft may be greater than the radius from which the plurality of blades protrude from the central shaft.

The cover adjustment plate has a circular shape having a larger diameter than the blade adjustment plate, the lower side of the plurality of cover pivoting links are respectively connected to the radially spaced edge portions along the circumference of the cover adjustment plate, The radius at which the plurality of blades protrude from the central shaft may be smaller than the radius at which the plurality of cover pivot links are spaced apart from the central shaft.

The ducted fan according to an embodiment may include a plate driving unit configured to move the blade adjusting plate or the cover adjusting plate in the longitudinal direction of the central shaft; A vertical thrust detection sensor measuring vertical thrust output from the ducted fan; And a control unit for controlling driving of the rotary rotor and the plate driving unit and adjusting the position of the cover adjusting plate based on the position of the vertical thrust output from the ducted fan or the position of the blade adjusting plate.

Ducted fan according to an embodiment, the duct having a hollow; A central shaft passing through the center of the hollow; A rotary rotor rotating around the central shaft; A blade driving module for adjusting a receiving angle of a plurality of blades rotating about the central shaft together with the rotating rotor; And a cover driving module for adjusting a cover angle of the plurality of covers pivoting with respect to the central shaft, and the blade driving module may be organically driven according to the operation of the cover driving module.

The blade drive module may include: the plurality of blades forming vertical thrust of the ducted fan; A plurality of blade pivot links connected to the plurality of blades to adjust a receiving angle of the plurality of blades; And a blade adjusting plate connected to the plurality of blade pivot links to move the plurality of blade pivot links parallel to the longitudinal direction of the central shaft.

The cover drive module may include: the plurality of covers capable of selectively shielding a hollow upper side of the ducted fan; A plurality of cover pivot links connected to the plurality of covers to adjust the angles of the plurality of covers; And a cover adjustment plate connected to the plurality of cover pivot links to move the plurality of cover pivot links parallel to the longitudinal direction of the central shaft.

The blade adjustment plate may be rotatably coupled to the cover adjustment plate.

According to the ducted fan according to an embodiment, it is possible to collectively adjust the angle of the blade.

According to the ducted fan according to an embodiment, the angle of the blade and the cover may be organically adjusted at the same time through one driving unit.

According to the ducted fan according to an embodiment, when the angle of attack of the blade is increased, the flow rate of the blade end when the angle of attack of the blade is excessively large because the angle of the cover can be organically reduced to reduce the flow of inflow Peeling phenomenon can be alleviated.

1 is a perspective view of a vehicle including a ducted fan according to an embodiment.
2 is a perspective view illustrating a ducted fan according to an embodiment.
3 is a front view illustrating only a partial configuration of a ducted fan according to an exemplary embodiment.
4 is a block diagram of a ducted fan according to an embodiment.
5 is a front view illustrating an operation structure of a ducted fan according to an embodiment.
6 is a front view illustrating an operation structure of a ducted fan according to an embodiment.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the embodiment, when it is determined that the detailed description of the related well-known configuration or function interferes with the understanding of the embodiment, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but between components It will be understood that may be "connected", "coupled" or "connected".

Components included in any one embodiment and components including common functions will be described using the same names in other embodiments. Unless stated to the contrary, the description in any one embodiment may be applied to other embodiments, and detailed descriptions thereof will be omitted in the overlapping range.

1 is a perspective view of a vehicle including a ducted fan according to an embodiment, FIG. 2 is a perspective view of a ducted fan according to an embodiment, and FIG. 3 is a partial configuration of a ducted fan according to an embodiment 4 is a front view illustrating a bay, and FIG. 4 is a block diagram of a ducted fan according to an exemplary embodiment.

First, referring to FIG. 1, the ducted fan 1 according to an embodiment may be installed in a fuselage or a wing portion of the aircraft 200. The ducted fan 1 may form vertical thrust or perform attitude control of the vehicle 200 in an in-situ flight mode or a low-speed flight mode of the vehicle 200.

2 to 4, the ducted fan 1 according to an embodiment includes a duct 11, a central shaft 12, a rotary rotor 14, a blade driving module 15, and a cover driving module 16. ), A plate driver 17, a vertical thrust sensor 181, a speed sensor 182, and a controller 19.

The duct 11 may be a cylindrical case forming the outer shape of the ducted fan 1. For example, the duct 11 may have a hollow penetrating the center in a vertical direction. Accordingly, the upper and lower spaces of the duct 11 can be communicated through the hollow.

The central shaft 12 may be located at the cylindrical center of the duct 11, that is, may be fixed at the center of the hollow of the duct 11 and arranged to be parallel to the central axis of the hollow. For example, the central shaft 12 may be connected and fixed through a separate member from the hollow inner surface of the duct 11.

For example, the central shaft 12 may include a cover base 121 formed at an upper end of the central shaft 12. The cover base 121 may be rotatably provided with a plurality of covers 163 to be described later in order to shield the hollow of the duct 11 from the upper space of the duct 11.

For example, the cover base 121 may include a plurality of cover pivot 1211 in which the plurality of covers 163 may be rotatably installed. For example, the plurality of cover pivot 1211 may be formed to be radially spaced apart from the outer surface of the cover base 121 with respect to the central shaft 12 at regular intervals.

For example, the cover pivot 1211 may be a groove rotatably receiving at least a portion of the cover 163. As another example, the plurality of cover pivot 1211 may be a member penetrating the cover base 121 and the plurality of covers 163.

The rotary rotor 14 may be rotatably installed with respect to the central shaft 12 in the hollow interior of the duct 11. For example, the rotary rotor 14 may have a rotational axis parallel to the vertical direction, that is, the direction in which the hollow of the duct 11 communicates, that is, the longitudinal direction of the central shaft 12.

For example, the rotary rotor 14 may include a plurality of blade pivot shaft 141 in which a plurality of blades 153 to be described later may be rotatably installed.

The plurality of blade rotation shafts 141 may be formed to be radially spaced apart from the outer surface of the rotary rotor 14 with respect to the central shaft 12 at regular intervals. For example, the blade pivot 141 may be a groove that rotatably receives at least a portion of the blade 153. As another example, the plurality of blade rotation shaft 141 may be a member penetrating the rotary rotor 14 and the plurality of blades 153.

The blade driving module 15 is connected to the plurality of blades 153 to form a vertical thrust of the ducted fan 1 and the plurality of blades 153 to adjust the angle of attack of the plurality of blades 153. A plurality of blade pivot link 152 and the blade adjustment plate 151 connected to the opposite of the blade pivot link 152 may be included.

The plurality of blades 153 may protrude from the rotary rotor 14. For example, the plurality of blades 153 may be spaced apart at regular intervals from the outer surface of the rotary rotor 14 with respect to the central shaft 12.

For example, the blade 153 may include a blade end 1531 and a blade pivot connection 1532.

The blade end portion 1531 is a plurality of blades 153 is in direct contact with the air as the rotary rotor 14 rotates to push the air downward. For example, the blade end 1153 may be connected to the blade rotation shaft 141 and installed to be rotatable with respect to the rotary rotor 14.

For example, the blade end 1153 may be rotated to be inclined with respect to a plane perpendicular to the direction of the central shaft 12, in which case the blade end 1531 is perpendicular to the central shaft 12. The angle of inclination formed from the plane may be referred to as the "angle of reception".

The blade pivot connection part 1532 may be a member that is formed at one side of the blade end portion 1531 and rotatably connected to an upper end of the blade pivot link 152.

For example, the blade pivot connection part 1532 may be formed at a portion of the blade end portion 1531 spaced apart at regular intervals based on the blade pivot shaft 141, or based on the blade pivot shaft 141. The protrusion may be formed to be spaced apart at regular intervals.

The plurality of blade pivot links 152 may connect the plurality of blades 153 and the blade adjustment plate 151. The plurality of blade pivot links 152 may provide a force or moment to pivot the plurality of blades 153 relative to the rotary rotor 14.

For example, upper ends of the plurality of blade pivot links 152 may be rotatably connected to the blade pivot connection portions 1532 of the plurality of blades 153, and lower ends of the plurality of blade pivot links 152 may be blade adjusted. Each may be connected to radially spaced portions along the circumference of the plate 151.

For example, the rotation axis between the upper end of the blade rotation link 152 and the blade rotation connecting portion 1532 which are rotatably connected to each other is a blade rotation axis for rotating the blade 153 with respect to the rotary rotor 14 ( 141 may be spaced apart in parallel to each other.

For example, the plurality of blade pivot links 152 may be installed in parallel with the central shaft 12 between the plurality of blades 153 and the blade adjustment plate 151.

The blade adjustment plate 151 is provided below the rotary rotor 14, and can be installed to be movable in a direction parallel to the central shaft 12, that is, in the longitudinal direction of the central shaft 12, It may be connected to the rotary rotor 14 and rotatably installed like the rotary rotor 14.

For example, the blade adjustment plate 151 may move along the longitudinal direction of the central shaft 12 in a state in which the central shaft 12 is accommodated therein. For example, the blade adjustment plate 151 may be moved by the plate driver 17 to be described later.

For example, the blade adjustment plate 151 may perform a translational movement in the longitudinal direction of the central shaft 12 and a rotational movement about the central shaft 12 with respect to the central shaft 12. For example, the blade adjustment plate 151 may not be tilted or displaced relative to the central shaft 12.

For example, the blade adjustment plate 151 may have a circular shape that is formed perpendicular to the central shaft 12. For example, the center of the blade control plate 151 may include a hollow through which the central shaft 12 passes vertically.

For example, the lower ends of the plurality of blade pivot links 152 may be connected to a plurality of portions radially spaced along the circumferential edge of the blade adjusting plate 151 of the portion of the blade adjusting plate 151, whereby Accordingly, the plurality of blade pivot links 152 may be disposed radially spaced apart from the plurality of blades 153 and the blade adjustment plate 151 with respect to the central shaft 12.

According to the blade drive module 15, when the blade adjustment plate 151 moves in the up and down direction with respect to the central shaft 12, the plurality of blade rotation links 152 connected to the blade adjustment plate 151 in the up and down direction I can move it. Thus, the upper ends of the plurality of blade pivot links 152 can pivot the blade pivot connection portions 1532 of each of the plurality of blades 153 connected therefrom with respect to the rotary rotor 14. Accordingly, the blade end portion 1531 is rotated about the blade pivot shaft 141, and as a result, the receiving angles of the plurality of blades 153 can be collectively adjusted.

The cover drive module 16 includes a plurality of covers 163 for selectively adjusting the hollow upper side of the ducted fan 1 and a plurality of covers 163 for adjusting the angles of the plurality of covers 163. It may include a plurality of cover pivoting link 162 connected to the cover and the cover adjustment plate 161 connected to the opposite of the plurality of cover pivoting link (162).

The plurality of covers 163 may protrude from the cover base 121. For example, the plurality of covers 163 may be spaced apart at regular intervals from the outer surface of the cover base 121 with respect to the central shaft 12 at regular intervals. For example, the radius in which the plurality of covers 163 protrude from the central shaft 12 may be greater than the radius in which the plurality of blades 153 protrude from the central shaft 12.

For example, the cover 163 may include a cover end 1631 and a cover pivotal connection 1632.

The cover end 1631 may shield a part of the hollow upper portion as it rotates with respect to the cover base 121 between the cover base 121 and the inner surface of the duct 11 hollow. For example, cover end 1631 may be a plate-shaped member. For example, the cover end 1163 may be connected to the cover pivot 1211 of the cover base 121 to be rotatable with respect to the cover base 121.

For example, the cover end 1631 may be rotated to be inclined with respect to a plane perpendicular to the direction of the central shaft 12, in which case the cover end 1631 is a plane perpendicular to the central shaft 12. The angle of inclination formed from the surface may be referred to as the "cover angle".

For example, as shown in FIG. 3, the horizontal direction in which the cover end 1631 protrudes with respect to the cover pivot 1211 is opposite to the horizontal direction in which the blade end 1531 protrudes with respect to the blade pivot 141. It can be formed in the direction.

According to the above structure, when the plurality of covers 163 are rotated at a predetermined angle or more, the horizontal direction of the inflow flowing from the upper side of the duct 11 and the horizontal direction in which the plurality of blades 153 are inclined. Since it is formed in the same manner as above, it is possible to alleviate excessive collisions or friction between the inflow flowing from the upper side of the duct 11 and the plurality of rotating blades 153, the flow separation phenomenon occurring at the end of the blade 153 Can alleviate

The cover pivotal connection part 1632 may be a member formed at one side of the cover end 1631 and pivotally connected to an upper end of the cover pivotal link 162. For example, the cover pivotal connector 1632 may be formed at a portion of the cover end 1631 that is spaced apart at regular intervals based on the cover pivot 1211. As another example, the cover pivotal connector 1632 may be formed to protrude spaced apart from one side of the cover end (1631) at a predetermined interval.

The plurality of cover pivot links 162 may connect the plurality of covers 163 and the cover adjustment plate 161. The plurality of cover pivot links 162 may provide a force or moment for pivoting the plurality of cover ends 1631 with respect to the rotary rotor 14.

For example, the upper ends of the plurality of cover pivoting links 162 may be rotatably connected to the cover pivoting connections 1632 of each of the plurality of covers 163, and the lower ends of the plurality of cover pivoting links 162 may be adjusted. It may be connected to the radially spaced apart portions along the circumference of the plate 161, respectively.

For example, the rotation shaft between the upper end of the cover rotation link 162 and the cover rotation connection portion 1632 which are rotatably connected to each other is a cover rotation shaft that rotates the cover end 1631 with respect to the cover base 121. 1211 may be spaced apart in parallel to each other.

For example, the plurality of cover pivot links 162 may be disposed in parallel with the central shaft 12 between the plurality of covers 163 and the cover adjustment plate 161.

The cover adjustment plate 161 is provided below the rotary rotor 14 and may be installed to be movable in the longitudinal direction of the central shaft 12.

For example, the cover adjustment plate 161 may move along the longitudinal direction of the central shaft 12 in a state in which the central shaft 12 is accommodated therein. For example, the cover adjustment plate 161 may be moved by the plate driver 17 to be described later.

For example, the cover adjustment plate 161 may be disposed perpendicular to the central shaft 12. For example, the cover adjustment plate 161 may perform a translational movement of the central shaft 12 in the longitudinal direction of the central shaft 12. For example, the cover adjustment plate 161 may not be rotated about the central shaft 12.

For example, the cover adjustment plate 161 may be coupled to each other in the longitudinal direction of the blade adjustment plate 151 and the central shaft 12, so that, depending on the drive of the plate drive unit 17, the cover adjustment plate 161 and The blade adjustment plate 151 can be moved at the same time. For example, the blade adjustment plate 151 may be coupled to the upper side of the cover adjustment plate 161.

In this case, the blade adjustment plate 151 may be rotatably installed with respect to the cover adjustment plate 161 with respect to the central shaft 12, and the blade adjustment plate 151 and the cover adjustment plate 161 may be mutually disposed. A bearing may be additionally provided to support the rotation operation of the. As another example, it is noted that the blade adjustment plate 151 and the cover adjustment plate 161 may be moved independently of each other.

For example, the cover adjustment plate 161 may have a circular shape disposed perpendicular to the central shaft 12. For example, the center of the cover adjustment plate 161 may include a hollow through which the central shaft 12 passes vertically.

For example, the lower ends of the plurality of cover pivoting links 162 may be connected to a plurality of portions radially spaced along a circumferential edge of the cover adjusting plate 161 among the portions of the cover adjusting plate 161. Accordingly, the plurality of cover pivot links 162 may be disposed radially spaced apart from the plurality of covers 163 and the cover adjustment plate 161 with respect to the central shaft 12.

According to the cover drive module 16, when the cover adjustment plate 161 moves up and down with respect to the center shaft 12, the plurality of cover rotation links 162 connected to the cover adjustment plate 161 in the up and down direction I can move it. Accordingly, the upper ends of the plurality of cover pivot links 162 may pivot the cover pivot connection portions 1632 of the plurality of covers 163 connected therefrom with respect to the cover base 121.

Accordingly, the cover end 1631 rotates about the cover pivot 1211, so that the cover angles of the plurality of covers 163 can be adjusted as a result.

For example, as the blade adjusting plate 151 or the cover adjusting plate 161 moves in the vertical direction, the direction in which the plurality of blades 153 or the plurality of covers 163 rotates may be the blade driving module 15 or the like. Note that it may be arbitrarily formed according to the configuration of the cover drive module 16 or its purpose.

For example, when the blade adjustment plate 151 and the cover adjustment plate 161 has a circular shape, the diameter of the cover adjustment plate 161 may be formed larger than the diameter of the blade adjustment plate 151. In this case, a radius of the plurality of blades 153 protruding from the central shaft 12 may be smaller than a radius of the plurality of cover pivoting links 162 spaced apart from the central shaft 12.

According to the above structure, as shown in FIGS. 2 and 4, the plurality of cover pivoting links 162 may have a central shaft 12 rather than a plurality of blade pivoting links 152 and a plurality of blades 153 relative to the central shaft 12. Since the plurality of cover pivot links 162 may not interfere with each other, the plurality of cover pivot links 162 may be positioned at the outer side with respect to the plurality of blades 153.

As a result, even when the blade adjustment plate 151 and the cover adjustment plate 161 move in the up and down direction at the same time, the blade drive module 15 and the cover drive module 16 do not interfere with each other in their respective operations. 11) can be installed compactly in the hollow interior.

The plate driving unit 17 may be a power unit capable of moving the blade adjusting plate 151 and the cover adjusting plate 161 in the vertical direction with respect to the central shaft 12. As another example, when the blade adjusting plate 151 and the cover adjusting plate 161 are moved separately, the plate driving unit 17 may move the blade adjusting plate 151 or the cover adjusting plate 161 separately. Can be.

The vertical thrust detection sensor 181 may measure the force, ie, the vertical thrust, that the plurality of blades 153 pushes air downward in accordance with the rotation of the rotary rotor 14.

The rotation speed sensor 182 can measure the rotation speed at which the rotation rotor 14 rotates about the central shaft 12.

The control unit 19 can control the driving of the ducted fan 1.

For example, the controller 19 may drive the rotary rotor 14 to perform a rotational movement with respect to the central shaft 12, and may control the rotational speed of the rotary rotor 14.

For example, the controller 19 may adjust the angles of reception of the plurality of blades 153 by moving the blade adjustment plate 151 in the vertical direction through the driving of the plate driver 17. For example, the controller 19 may adjust the cover angles of the plurality of covers 163 as the cover adjusting plate 161 is moved in the vertical direction through the driving of the plate driving unit 17.

For example, when the blade adjustment plate 151 is coupled with the cover adjustment plate 161, the control unit 19 simultaneously moves the blade adjustment plate 151 and the cover adjustment plate 161, thereby providing a plurality of blades ( The receiving angle of 153 and the cover angle of the plurality of covers 163 may be adjusted at the same time.

For example, the control unit 19 is a plurality of covers 163 by moving the cover adjustment plate 161 in one direction when the vehicle 200 on which the ducted fan 1 is installed advances at high speed. Can be rotated so as to completely shield the upper side of the hollow of the duct 11.

For example, the controller 19 may measure the rotation speed of the rotation rotor 14 based on the information measured by the rotation speed detection sensor 182. For example, the controller 19 may measure the vertical thrust output from the ducted fan 1 based on the information measured by the vertical thrust detection sensor 181.

For example, the controller 19 may adjust the angles of reception of the plurality of blades 153 based on the rotational speed of the rotary rotor 14 in order to output a vertical thrust having a desired size.

For example, the control unit 19 adjusts the cover angles of the plurality of covers 163 based on the rotational speed of the rotary rotor 14, thereby adjusting the flow rate and direction of the inflow flowing into the upper side of the duct 11. I can regulate it.

For example, the control unit 19 is based on the vertical thrust output from the ducted fan 1 or the angle of attack of the plurality of blades 153 (or the position of the blade adjustment plate 151), thereby providing a plurality of covers ( 163 may adjust the cover angle. According to the above structure, when the receiving angle of the plurality of blades 153 is excessively increased or the plurality of blades 153 rotates at an excessive speed, flow separation occurs at the ends of the plurality of blades 153, causing stall phenomenon. It can be prevented from occurring.

5 is a front view illustrating an operating structure of the ducted fan according to an embodiment, and FIG. 6 is a front view illustrating an operating structure of the ducted fan according to an embodiment.

Specifically, FIGS. 5 and 6 illustrate the blade adjustment plate 151 and the cover adjustment plate 161 coupled to each other. As the blade adjustment plate 151 and the cover adjustment plate 161 move in the vertical direction, A process of organically adjusting the angles of the plurality of blades 153 and the plurality of covers 163 is illustrated.

First, referring to FIG. 5, the structure in which the blade adjustment plate 151 and the cover adjustment plate 161 are moved downward with respect to the central shaft 12 may be confirmed.

For example, the horizontal direction in which the cover end 1631 protrudes with respect to the cover pivot 1211 may be opposite to the horizontal direction in which the blade end 1531 protrudes with respect to the blade pivot 141. .

For example, when the controller 19 moves the blade adjusting plate 151 and the cover adjusting plate 161 downward through the plate driving unit 17, the plurality of blades 153 may be rotated clockwise (FIGS. 5 and 5). 6 reference), that is, the rotation angle can be rotated in a decreasing direction, and at the same time the plurality of covers 163 shields the counterclockwise direction (see FIGS. 5 and 6), that is, the hollow of the duct 11. The cover angle may be increased by rotating in a direction in which the degree of reduction is reduced.

For example, when the cover adjustment plate 161 moves completely downward with respect to the central shaft 12, the plurality of covers 163 are rotated to be parallel to the hollow communicating direction of the duct 11, so that the housing () The hollow of can be opened to the maximum from the upper space.

Subsequently, when the controller 19 moves the blade adjusting plate 151 and the cover adjusting plate 161 upward with respect to the central shaft 12 as shown in FIG. 6, the plurality of blades 153 are counterclockwise (FIG. 5 and 6), that is to say, it can be rotated in a direction in which the angle of incidence increases, while at the same time the plurality of covers 163 are counterclockwise (based on FIGS. 5 and 6), that is, of the duct 11. The cover angle can be reduced by rotating in the direction of increasing the degree of shielding the hollow.

For example, when the cover adjustment plate 161 moves completely upward with respect to the central shaft 12, the plurality of covers 163 may rotate to completely shield the upper side of the hollow of the duct 11.

5 and 6, according to the blade driving module 15 and the cover driving module 16 operating organically with each other, the plurality of covers 163 as the receiving angle of the plurality of blades 153 increases. The reduction of the cover angle of the c) decreases the flow rate of the inflow flowing from the upper side of the duct 11, and in addition, the inflow flowing from the upper side of the duct 11 is further deflected in the horizontal direction. Thus, even if the angle of attack of the plurality of blades 153 is excessively increased, it is possible to alleviate the occurrence of the flow separation phenomenon at the ends of the plurality of blades 153.

Although embodiments have been described with reference to the accompanying drawings as described above, various modifications and variations are possible to those skilled in the art from the above description. For example, the described techniques may be performed in a different order than the described method, and / or components of the described structure, apparatus, etc. may be combined or combined in a different form than the described method, or may be combined with other components or equivalents. Appropriate results can be achieved even if they are replaced or substituted.

Claims (14)

Ducts having a hollow;
A central shaft passing through the center of the hollow;
A rotary rotor rotating around the central shaft;
A plurality of blades rotatably installed at radially spaced positions along an edge of the rotary rotor;
A blade adjustment plate installed to be movable in the longitudinal direction of the central shaft and rotatably installed like the rotary rotor; And
A plurality of blade pivot links connected to each of the plurality of blades from radially spaced positions along a circumference of the blade adjusting plate;
A plate driver for moving the blade adjustment plate in the longitudinal direction of the central shaft;
A speed sensor for measuring a rotation speed of the rotary rotor;
Vertical thrust detection sensor for measuring the vertical thrust output from the duct; And
A control unit for controlling the position of the blade adjustment plate based on the rotational speed of the rotary rotor measured by the speed sensor in order to control the driving of the rotary rotor and the plate drive, and output a vertical thrust of a desired size Including,
The blade,
A blade end rotatably installed with respect to the rotary rotor and cutting off air; And
A blade pivot connection part connected to one side of the blade end and rotatably connected to an upper end of the blade pivot link,
The rotation shaft between the blade rotation link and the blade rotation connection portion is formed ducted fan spaced apart in parallel with the rotation axis between the rotary rotor and the blade end.
delete delete The method of claim 1,
A plurality of covers rotatably installed at radially spaced positions along a circumference of an upper end of the central shaft;
A cover adjustment plate installed to be movable in the vertical direction with respect to the central shaft; And
And a plurality of cover pivot links connected to each of the plurality of covers from positions radially spaced apart at regular intervals along the circumference of the cover adjustment plate.
The method of claim 4, wherein
The cover,
A cover end rotatably installed with respect to the central shaft to selectively shield an upper portion of the hollow; And
A cover pivotal connection part connected to one side of the cover end and rotatably connected to an upper end of the cover pivotal link,
The rotating shaft between the cover rotational link and the cover rotational connecting portion is formed to be spaced apart in parallel with the rotational axis between the central shaft and the cover end.
The method of claim 4, wherein
The blade adjustment plate, the ducted fan is rotatably coupled to the upper side of the cover adjustment plate.
Ducts having a hollow;
A central shaft passing through the center of the hollow;
A rotary rotor rotating around the central shaft;
A plurality of blades rotatably installed at radially spaced positions along an edge of the rotary rotor;
A blade adjustment plate installed to be movable in the longitudinal direction of the central shaft and rotatably installed like the rotary rotor;
A plurality of blade pivot links connected to each of the plurality of blades from radially spaced positions along the circumference of the blade adjusting plate; A plurality of covers;
A cover adjustment plate installed to be movable in the vertical direction with respect to the central shaft; And
A plurality of cover pivot links connected to each of the plurality of covers from positions spaced radially at regular intervals along the circumference of the cover adjustment plate,
The blade adjustment plate is rotatably coupled to the upper side of the cover adjustment plate,
When the blade adjusting plate and the cover adjusting plate move in one direction parallel to the direction of the central shaft, the plurality of blades rotate so as to increase an angle formed from a plane parallel to the central shaft, and at the same time, the plurality of blades The four covers rotate to reduce the angle formed from a plane parallel to the central shaft,
When the blade adjusting plate and the cover adjusting plate move in the other direction opposite to the one direction, the plurality of blades rotate so as to reduce the angle formed from a plane parallel to the central shaft, and at the same time The ducted pan rotates so that the cover increases from an angle formed from a plane parallel to the central shaft.
The method of claim 6,
A ducted fan, wherein a radius of the plurality of covers protruding from the central shaft is greater than a radius of the plurality of blades protruding from the central shaft.
The method of claim 8,
The cover adjustment plate has a circular shape having a larger diameter than the blade adjustment plate,
Lower sides of the plurality of cover pivot links are connected to edge portions spaced apart at regular intervals radially along the circumference of the cover adjustment plate,
The radius of the plurality of blades protruding from the central shaft is formed smaller than the radius of the plurality of cover rotational link from the central shaft.
The method of claim 4, wherein
A plate driver for moving the blade adjusting plate or the cover adjusting plate in the longitudinal direction of the central shaft;
A vertical thrust detection sensor measuring vertical thrust output from the ducted fan; And
And a control unit controlling driving of the rotary rotor and the plate driving unit and adjusting the position of the cover adjusting plate based on the vertical thrust output from the ducted fan or the position of the blade adjusting plate.
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