CN112623231A

CN112623231A - Built-in electric heating's screw paddle

Info

Publication number: CN112623231A
Application number: CN202110037727.7A
Authority: CN
Inventors: 史立; 南雍; 胡慧君
Original assignee: Anhui Xoar Aerotech Co ltd
Current assignee: Anhui Xoar Aerotech Co ltd
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2021-04-09

Abstract

The invention discloses a propeller blade with built-in electric heating, which comprises a blade body, a skin layer and an electric heating layer, wherein: the paddle body is provided with an electric heating area, the electric heating layer is paved on the electric heating area, the masking layer is paved on the paddle body and covers the electric heating layer, and the outer surface of the masking layer forms the pneumatic appearance of the paddle. According to the propeller blade with the built-in electric heating, the electric heating layer is laid inside the blade skin layer, the pneumatic appearance of the blade is not changed, the pneumatic performance of the propeller is guaranteed, even if the electric heating area at the front edge of the blade is impacted by foreign objects, the electric heating function cannot fail as long as the blade structure does not fail, the reliability is greatly improved, the electric heating deicing function is realized, the weight of the propeller structure is not additionally increased, and the weight reduction of the propeller is realized.

Description

Built-in electric heating's screw paddle

Technical Field

The invention relates to the technical field of propellers, in particular to a propeller blade with built-in electric heating.

Background

At present, the anti-icing measure of the propeller is to add an electric heating deicing belt or a liquid deicing belt on the theoretical outer surface. No matter the electric heating deicing belt or the liquid deicing belt, the rubber piece is adhered to the surface of the front edge of the blade, so that the pneumatic appearance of the blade is locally changed, and the original performance of the propeller is reduced; the electric heating deicing belt is heated by a resistance wire, and heating is uneven, so that larger power is needed to realize the deicing function; the electric heating deicing belt is adhered to the surface of the front edge of the propeller, and is easily impacted by foreign objects to cause the heating function of the deicing belt to be invalid; the deicing belt is adhered to the surface of the front edge of the propeller, and due to the centrifugal force, the deicing belt has the risk of flying off; the deicing belt is a necessary replacement when the propeller is repaired, and the operation and maintenance cost is high; the liquid deicing system is heavy and has a limited deicing fluid loading capacity and cannot work continuously for a long time. Some disadvantages existing in the existing method for sticking the deicing belt on the surface of the propeller are mainly reflected in the following aspects:

the traditional deicing belt locally changes the aerodynamic appearance of the blade and reduces the original aerodynamic performance of the propeller;

the traditional deicing belt is heated by a resistance wire and is uneven in heating, so that a larger power is required to realize the deicing function, the energy consumption is high, and the power supply load of a host is large;

the deicing belt is adhered to the front edge surface of the propeller and is easy to be impacted by foreign objects, so that the heating function of the deicing belt is invalid, and the reliability is poor;

the traditional deicing belt is a rubber product, has over 150g of self weight, is adhered to the surface of the front edge of the propeller by an adhesive, has flying-off risks due to centrifugal force, and additionally increases the workload of operation and maintenance and the difficulty of work;

the deicing belt is a rubber product, and belongs to a replacement part when the service life of the propeller TBO is restored, the propeller must be scrapped and replaced, and the operation cost is increased.

Disclosure of Invention

In order to solve the technical problems in the background art, the invention provides a propeller blade with built-in electric heating.

The invention provides a built-in electric heating propeller blade, which comprises a blade body, a skin layer and an electric heating layer, wherein:

the paddle body is provided with an electric heating area, the electric heating layer is paved on the electric heating area, the masking layer is paved on the paddle body and covers the electric heating layer, and the outer surface of the masking layer forms the pneumatic appearance of the paddle.

As a further optimized scheme of the invention, the material of the electric heating layer is a carbon fiber composite material.

As a further optimized scheme of the invention, the electric heating zone is positioned at the position of the front edge of the blade with 65% R of the span direction and 30% of chord length of the chord direction.

As a further optimized scheme of the invention, an insulating layer is arranged between the electric heating layer and the skin layer.

As a further optimized scheme of the invention, the electric heating paddle further comprises a wiring terminal, wherein the wiring terminal is arranged at the front end of the paddle body and is electrically connected with the electric heating layer.

As a further optimized scheme of the invention, the wiring terminal is provided with a wire buckle.

As a further optimized scheme of the invention, the skin layer and the electric heating layer are integrally formed.

According to the propeller blade with the built-in electric heating, the electric heating layer is laid inside the blade skin layer, the pneumatic appearance of the blade is not changed, the pneumatic performance of the propeller is guaranteed, even if the electric heating area at the front edge of the blade is impacted by foreign objects, the electric heating function cannot fail as long as the blade structure does not fail, the reliability is greatly improved, the electric heating deicing function is realized, the weight of the propeller structure is not additionally increased, and the weight reduction of the propeller is realized.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

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

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a transverse cross-sectional view of a blade according to the invention;

fig. 4 is a development view of the electric heating layer of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar designations denote like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

A built-in electrically heated propeller blade as shown in fig. 1-4, comprising a blade body 1, a skin layer 2 and an electrical heating layer 3, wherein:

the blade body 1 is provided with an electric heating zone 10, the electric heating zone 10 is positioned at the front edge position of the blade with 65% R of span direction and 30% chord length of chord direction, the electric heating zone 3 is laid on the electric heating zone 10, the skin layer 2 is laid on the blade body 1 and covered on the electric heating zone 3, the outer surface of the skin layer 2 forms the pneumatic appearance of the blade, an insulating layer 4 is arranged between the electric heating zone 3 and the skin layer 2, the skin layer 2 and the electric heating zone 3 are integrally formed, the electric heating zone 3 is firstly laid on the blade body 1, then the skin layer 2 is laid, and the pneumatic performance of the blade is not changed;

the electric heating layer 3 is made of carbon fiber composite materials, and when the paddle is subjected to heating treatment, the electric heating layer 3 heats the skin layer 2 in two modes of heat conduction and infrared radiation;

still include binding post 5, binding post 5 establishes at 1 front end of paddle body, and binding post 5 is connected with electric heating layer 3 electricity, for the convenience of the wiring, has wire buckle 6 on binding post 5.

In the working process of the embodiment: the electric heating layer 3 belongs to one part of a composite propeller structure, the skin layer 2 and the electric heating layer 3 are integrally designed and are laid inside the skin layer 2, the pneumatic appearance of the propeller blade is not changed, and the pneumatic performance of the propeller is ensured; the electric heating layer 3 is laid under the skin layer 2, covers the front edge position of the blade with 65% R of the span direction and 30% chord length of the chord direction, heats the whole covering surface after being electrified, uniformly heats the skin layer 2 in two modes of heat conduction and far infrared radiation, has better deicing effect than a resistance wire heating deicing belt, reduces the energy consumption by 25%, and reduces the power supply load of a host; the electric heating layer 3 is laid on the inner side of the lower structural layer of the blade skin layer 2, so that even if the electric heating area 10 region of the front edge of the blade is impacted by foreign objects, as long as the blade structure does not fail, the electric heating function does not fail, and the reliability is greatly improved; the skin layer 2 and the electric heating layer 3 are integrally formed, so that the electric heating deicing function is realized, the weight of the propeller structure is not additionally increased, and the weight reduction of the propeller is realized; the skin layer 2 and the electric heating layer 3 integrated into one piece make, and electric heating layer 3 lays structural layer inboard under paddle skin layer 2 moreover, has consequently realized non-maintaining in the life-span of screw, reduces the operation maintenance cost.

In this embodiment, it is preferred that the material of electric heating layer 3 is carbon fiber composite, and when carrying out heat treatment to the paddle, electric heating layer 3 carries out heat conduction and infrared radiation two kinds of modes to skin layer 2 and heats skin layer 2.

In the preferred embodiment, the electric heating zone 10 is located at the front edge of the blade with 65% R of span-wise length and 30% chord-wise length, the whole covering surface is heated after electrification, the skin layer 2 is uniformly heated in two modes of heat conduction and far infrared radiation, the deicing effect is better than that of a resistance wire heating deicing belt, the energy consumption is reduced by 25%, and the power supply load of a host is reduced.

In the present embodiment, an insulating layer 4 is preferably provided between the electric heating layer 3 and the skin layer 2.

In order to facilitate the electrification of the heating layer at this point, it is preferable in this embodiment to further include a connection terminal 5, where the connection terminal 5 is disposed at the front end of the paddle body 1, and the connection terminal 5 is electrically connected to the electric heating layer 3.

For the convenience of wiring, it is preferable in this embodiment that the terminal 5 has a wire catch 6 thereon.

In this embodiment, preferably, the skin layer 2 and the electric heating layer 3 are integrally formed, and the electric heating layer 3 and then the skin layer 2 are laid on the blade body 1, so that the aerodynamic performance of the blade is not changed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a built-in electric heating's screw propeller blade which characterized in that, includes paddle body (1), skin layer (2) and electric heating layer (3), wherein:

the paddle is characterized in that an electric heating area (10) is arranged on the paddle body (1), the electric heating area (10) is paved on the electric heating area (3), the masking layer (2) is paved on the paddle body (1) and covers the electric heating area (3), and the outer surface of the masking layer (2) forms the pneumatic appearance of the paddle.

2. The internally electrically heated propeller blade according to claim 1, wherein the material of the electrically heated layer (3) is a carbon fiber composite material.

3. The internally electrically heated propeller blade of claim 1 wherein the electrical heating zone (10) is located at the blade leading edge at 65% R span-wise and 30% chord-wise chord length.

4. The internally electrically heated propeller blade according to claim 1, wherein an insulating layer (4) is provided between the electrically heated layer (3) and the skin layer (2).

5. The propeller blade with the built-in electric heating function as recited in claim 1, further comprising a connection terminal (5), wherein the connection terminal (5) is arranged at the front end of the blade body (1), and the connection terminal (5) is electrically connected with the electric heating layer (3).

6. The propeller blade with built-in electric heating according to claim 5, wherein the wiring terminals (5) have wire catches (6) thereon.

7. The internally electrically heated propeller blade according to claim 1, wherein the skin layer (2) and the electrically heated layer (3) are integrally formed.