WO2018201812A1

WO2018201812A1 - Ducted fan

Info

Publication number: WO2018201812A1
Application number: PCT/CN2018/079752
Authority: WO
Inventors: 刘若鹏; 栾琳; 徐冠雄; 李聪; 欧栋生
Original assignee: 深圳光启合众科技有限公司
Priority date: 2017-05-03
Filing date: 2018-03-21
Publication date: 2018-11-08
Also published as: CN206942877U

Abstract

A ducted fan (100) comprises: a duct (10), having a central axis; a duct support (20), disposed inside of the duct, and a central axis thereof being coincident to that of the duct; a fan (30), disposed adjacent to an air intake of the duct, and being rotatable about the central axis of the duct support; a heat sink (23), embedded in the duct support, and part of air flow in the duct being flowing therethrough; and a power driving device; connected to the fan to drive the fan to rotate, wherein the power driving device is connected to the heat sink to form a loop for liquid coolants and the heat is dissipated by means of the heat sink. By embedding a heat sink in a duct support and using a fan to create high-speed air flow in the duct, the present invention enables high efficiency of heat dissipation performance of the heat sink and increases the cooling efficiency of an aircraft engine using a liquid-cooled engine as a power system, thereby decreasing the size of a heat sink and the weight of the aircraft, and also saving space for the aircraft.

Description

Ducted fan

Technical field

The utility model relates to the field of aircrafts, in particular to a ducted fan.

Background technique

At present, in the aircraft with the liquid-cooled engine driving the ducted fan as the power system, the radiator of the engine is installed at a place where the airflow rate is not high, and the cooling performance of the radiator is poor. When the radiator is installed on the aircraft, it not only occupies the aircraft. Space, but also affects the appearance.

technical problem

In view of the problem that the cooling performance of the aircraft radiator in the related art is poor, occupying space and affecting the appearance, an effective solution has not been proposed yet.

Technical solution

In view of the problem that the cooling performance of the aircraft radiator is poor, occupying space and affecting the appearance in the related art, the utility model proposes a ducted fan, which is embedded in the ducted fan and can improve the heat dissipation of the ducted fan aircraft engine. Performance, space saving, and the impact of the radiator mounting position on the appearance of the aircraft.

The technical solution of the utility model is realized as follows:

According to an aspect of the present invention, a ducted fan is provided, including:

The duct and the duct have a central axis;

The ducted pillar is disposed inside the duct, and the central axis of the ducted pillar overlaps with the central axis of the duct;

a fan disposed adjacent to the air inlet of the duct, the fan being rotatable about a central axis of the duct pillar;

a radiator embedded in the ducted struts and a portion of the airflow within the duct passes through the radiator;

The power driving device is connected with the fan to drive the fan to rotate, and the power driving device is connected with the heat sink to form a coolant circuit, and is radiated by the heat sink.

In one embodiment, the heat sink is an annular heat sink.

In one embodiment, the ducted strut includes an upper portion of the strut adjacent the ducted air inlet and a lower portion of the strut adjacent the ducted air outlet, and the upper portion of the strut is separated from the lower portion of the strut to allow a portion of the airflow within the duct to flow through the radiator.

In one embodiment, the ducted strut includes a flow guiding device.

In one embodiment, the flow guiding device is a flow guiding ring; wherein the air guiding ring is disposed on the outer casing of the lower portion of the pillar, the air guiding ring includes a first port and a second port disposed opposite to each other, the first port facing the duct The air outlet, the second port of the air guiding ring faces the air inlet of the duct, and the diameter of the second port is larger than the diameter of the first port.

In one embodiment, the heat sink includes a liquid inlet and a liquid outlet; wherein the liquid inlet communicates with a cooling line outlet of the power drive, and the liquid outlet communicates with a cooling line inlet of the power drive.

In one embodiment, the sides of the ducted struts are provided with at least two through holes, and the liquid inlet and the liquid outlet are respectively connected to the power drive via at least two through holes.

In one embodiment, a fairing is also provided that covers and is mounted on the top end of the ducted strut, the fairing being positioned above the fan and rotating as the fan rotates.

In one embodiment, a plurality of stationary vanes are further included. The plurality of stationary vanes are disposed between the fan and the duct air outlet, and the two ends of each vane are respectively fixed to the inner wall of the duct and the outer shell of the duct pillar.

In one embodiment, the heat sink and the ducted strut are constructed in a unitary structure.

Beneficial effect

The utility model realizes the high efficiency of the heat dissipation performance of the radiator by using a radiator installed in the duct pillar and utilizing the high-speed airflow generated by the fan in the duct, and improves the cooling efficiency of the aircraft engine with the liquid-cooled engine as the power system; In turn, the size of the radiator can be reduced, the weight of the aircraft can be reduced, and the space of the aircraft can be saved.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are merely the present invention. Some of the embodiments can be obtained by those of ordinary skill in the art in view of the drawings without any inventive effort.

It should be noted that these figures are intended to illustrate the general characteristics of the methods, structures, and/or materials used in certain exemplary embodiments, and to complement the written description provided below. However, the drawings are not to scale, and the precise structural or performance characteristics of any given embodiments are not to be construed as being limited, and should not be construed as limiting the scope limit. The use of similar or identical reference numerals in the various figures is intended to indicate similar or identical elements or components.

1 is a schematic view of a ducted fan according to an embodiment of the present invention;

2 is a schematic view of a ducted strut of a ducted fan according to an embodiment of the present invention;

Figure 3 is a schematic view of the heat sink of Figure 2;

4 is a schematic diagram of a ducted fan in accordance with an embodiment of the present invention.

Figure 5 is a schematic illustration of a ducted strut in the prior art.

Embodiments of the invention

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention are within the scope of the present invention.

1 to 4, a ducted fan 100 according to an embodiment of the present invention is shown. The ducted fan 100 includes a duct 10 having a central axis (not shown) and a ducted pillar 20, Disposed inside the duct 10 and the central axis of the duct pillar 20 coincides with the central axis of the duct 10; the fan 30 is disposed adjacent to the air inlet 60 of the duct, and the fan 30 can rotate around the central axis of the duct pillar 20; The device 23 is embedded in the duct support 20, and a part of the airflow in the duct 10 flows through the radiator 23; and a power driving device (not shown) is connected to the fan 30 to drive the fan 30 to rotate around the duct pillar 20. The power drive unit is connected to the radiator 23 to form a coolant circuit for dissipating heat through the radiator 23.

Wherein, the power driving device may be an engine, but any other suitable power driving device may be conceived and implemented, and the present invention is not limited thereto. And the fan can be driven in any suitable manner, such as connecting and driving the rotation of the shaft to drive the fan to rotate.

Figure 5 is a schematic illustration of a conventional ducted strut 210 of the prior art. The conventional ducted strut 210 is only used to install a fan, a rotating shaft and a stator blade, and has a single function. Compared with the prior art, the utility model realizes the high efficiency of the heat dissipation performance of the radiator by using the radiator embedded in the duct pillar and the high-speed airflow generated by the fan in the duct, and improves the liquid-cooled engine as the power system. The cooling efficiency of the aircraft engine; in turn, the size of the radiator can be reduced, the weight of the aircraft can be reduced, and the space of the aircraft can be saved.

In some exemplary embodiments, the ducted fan 100 further includes a fairing 40 that is overlaid and mounted on the top end of the ducted strut 20, the fairing 40 being positioned above the fan 30 and rotating as the fan 30 rotates. In some exemplary embodiments, the ducted fan 100 further includes a plurality of stator blades 50 disposed between the fan 30 and the duct air outlet 70, and the two ends of each stator blade 50 are respectively fixed to the culvert The inner wall of the track 10 and the outer casing of the ducted strut 20 have a function of rectifying and balancing the counter torque.

In some exemplary embodiments, the heat sink 23 and the ducted struts 20 are constructed in a unitary structure to facilitate assembly of the shouting fan.

Preferably, as shown in FIG. 3, the heat sink 23 is an annular heat sink which is attached to the inner peripheral wall of the duct pillar 20 to balance the force of the duct pillar and save space. It should be understood that the heat sink 23 may also be other forms of heat sinks that may be embedded in the ducted struts 20, and the present invention is not limited thereto.

2 and 3, the radiator 23 includes a liquid inlet port 28 and a liquid outlet port 27; wherein the liquid inlet port 28 communicates with the cooling pipe outlet of the power driving device, and the liquid outlet port 27 and the power driving device are cooled. The pipeline inlet is connected.

In one embodiment, the sides of the ducted struts 20 are provided with at least two through holes, and the liquid inlet 28 and the liquid outlet 27 are respectively connected to the power drive via at least two through holes.

The coolant flowing through the radiator 23 may be water or a dedicated coolant such as a mixture of 50% water and 50% ethylene glycol.

In one embodiment, the ducted struts 20 include a pillar upper portion 22 adjacent the ducted air inlet 60, a pillar lower portion 25 adjacent the ducted air outlet 70, and a tail vertebra disposed at one end of the pillar lower portion 25 adjacent the ducted air outlet 70. Body 26, and column upper portion 22 is separated from column lower portion 25 to allow a portion of the airflow within duct 10 to flow through heat sink 23.

Preferably, the number of through holes is set to two, and the two through holes are respectively disposed on the side walls of the pillar upper portion 22 and the pillar lower portion 25, and the liquid inlet port 28 and the liquid outlet port 27 are respectively connected to the power drive via the two through holes. The device extends the distance between the liquid inlet 28 and the liquid outlet 27 as much as possible, thereby prolonging the passage through which the coolant flows, and enhancing the heat dissipation effect. The liquid inlet 28 and the liquid outlet 27 of the radiator 23 are disposed on the same vertical line as much as possible, so as to be connected to the cooling line of the power driving device on the same side.

In one embodiment, the ducted strut 20 includes a flow directing device that splits the flow of air from the air inlet 70 of the duct to cause a portion of the airflow to flow through the radiator 23.

Preferably, the flow guiding device is a flow guiding ring 24; the first port of the guiding ring 24 is connected to one end of the lower portion 25 of the pillar adjacent to the air inlet 70 of the duct, and the second port of the air guiding ring 24 faces the air inlet 60 of the duct. And the second port is larger than the first port. By using the guide ring 24 having this structure, the flow rate of the air flowing through the radiator 23 can be increased, and the heat dissipation performance can be further improved.

Wherein, the flow guiding surface between the first port and the second port connecting the flow guiding ring 24 may be a ramp shape, a horn shape, a bowl shape, or other various suitable shapes of slopes or curved surfaces. The guide ring 24 can be formed directly on the outer casing of the lower portion 25 of the pillar, that is, integrally formed with the outer casing of the lower portion 25 of the pillar.

4 is a schematic diagram of a ducted fan according to an embodiment of the present invention. The high-speed airflow in the duct 10 flows through the duct air inlet 60 through the fan, and the airflow enters the duct 10 and is divided into an outer stream 82 and an inner stream 81. The air flow, the outflow 82 flows directly from the ducted air outlet 70 to the duct 10, and the inflow 81 flows through the radiator 23 through the deflector 24, and the heat of the radiator 23 is taken away and flows out from the duct outlet 70. In this way, the high-speed airflow generated by the fan in the duct 10 is utilized to improve the heat dissipation performance of the radiator, thereby achieving a good heat dissipation cooling effect on the power driving device (such as the engine).

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are included in the spirit and principles of the present invention, should be included in Within the scope of protection of the present invention.

Claims

A ducted fan, characterized in that it comprises:

a duct, the duct having a central axis;

a ducted pillar disposed inside the duct, the central axis of the ducted pillar overlapping with the central axis of the duct;

a fan disposed adjacent to the air inlet of the duct, the fan being rotatable about a central axis of the duct pillar;

a heat sink embedded in the duct pillar and a portion of the airflow in the duct flows through the radiator;

And a power driving device connected to the fan to drive the fan to rotate, the power driving device is connected to the heat sink and forms a coolant circuit, and the heat is dissipated through the heat sink.
The ducted fan of claim 1 wherein said heat sink is an annular heat sink.
A ducted fan according to claim 1, wherein said ducted strut includes an upper portion of a strut adjacent to said duct air inlet and a lower portion of a strut adjacent to said duct air outlet, and said pillar upper portion and said pillar The lower portion is separated to allow a portion of the gas flow within the duct to flow through the radiator.
A ducted fan according to claim 3, wherein said ducted strut comprises a flow guiding device.
The ducted fan according to claim 4, wherein the flow guiding device is a flow guiding ring;

Wherein the flow guiding ring is disposed on the outer casing of the lower portion of the pillar, the flow guiding ring includes a first port and a second port disposed opposite to each other, and the first port faces an air outlet of the duct The second port faces the air inlet of the duct, and the diameter of the second port is larger than the diameter of the first port.
The ducted fan according to claim 1, wherein the radiator comprises a liquid inlet and a liquid outlet;

Wherein, the liquid inlet is in communication with a cooling pipe outlet of the power driving device, and the liquid outlet is in communication with a cooling pipe inlet of the power driving device.
The ducted fan according to claim 6, wherein a side of the duct pillar is provided with at least two through holes, and the liquid inlet and the liquid outlet respectively pass through the at least two through holes Connected to the power drive.
A ducted fan according to claim 1, further comprising a fairing covering and mounted on a top end of said duct pillar, said fairing being positioned above said fan and rotating with said fan And turn.
The ducted fan according to claim 1, further comprising a plurality of stator blades, wherein the plurality of stator blades are disposed between the fan and the duct air outlet, and each of the stator blades Both ends are respectively fixed to the inner wall of the duct and the outer casing of the duct pillar.
A ducted fan according to any one of claims 1 to 9, wherein the heat sink and the ducted pillar are constructed in a unitary structure.