CN207960856U - The automatic deicer of blade of wind-driven generator - Google Patents

Abstract

The utility model is related to a kind of automatic deicers of blade of wind-driven generator.Including multiple electrical-heating films and deicing control system, the electrical-heating film setting corresponds to the easy ice forming locations in surface in blade, the electrical-heating film is two layers, it is parallel way between each electrical-heating film, socket is provided on the wheel hub of the blade, socket is connect by lead with film, the electronic lead screw of setting in the cabin of wind-driven generator, electronic lead screw is connect by connecting rod with plug, and plug is connected by deicing control system.The automated de-icing system of the utility model application wind-driven generator is controlled by outside to paralleling two beds electrical-heating film built in easy ice forming locations part in blade manufacturing process and heats automatic de-icing.Scenario-frame is simple in this way, and deicing effect is good, it is fast to remove speed of icing.

Description

Automatic deicing device for wind turbine blades

technical field

The utility model relates to a deicing device, in particular to an automatic deicing device for blades of a wind power generator.

Background technique

Wind power is the conversion of wind kinetic energy into electrical energy. As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. As a green and clean renewable energy, wind power will play an increasingly important role in China's future commitment to international energy conservation and emission reduction. Wind turbines are mainly composed of blades, generators, mechanical components and electrical components. Blades, one of the core components of wind turbines, are also developing toward larger structures. The main function of the blades of the wind turbine is to capture the wind and transmit the wind force to the rotor shaft. China's wind power development is mainly concentrated in the Three North region, and the biggest feature of the Three North region is that it experiences a relatively long period of low temperature environment every year, which brings serious tests to the wind turbine blades and even the entire fan. Generally, when the temperature is low to a certain level, blade icing is very likely to occur in rainy and snowy weather. The most direct impact of blade icing is that it will lead to blade overload and uneven distribution of ice load on the blade, which in turn will cause wind turbine output Severe icing will lead to a sharp drop in the power generation of wind turbines, and even blade breakage, damage to wind turbines and other accidents, resulting in huge economic losses. On the other hand, during the rotation of the blades, when the adhesion of the ice layer decreases, it is very easy for the ice cubes to fall off, causing operational accidents, and the situation that large ice cubes may fall and hurt people may also occur. After the blades are covered with ice, it is difficult to fall off. The blades without anti-icing and deicing functions can only wait for the sun to shine. After the ice on the blades melts and falls off, the wind turbines can restart operation.

Today, the icing detection technology can accurately detect the icing condition and location of the wind turbine, but there is no automatic or manual automatic deicing device, which has seriously affected the power generation efficiency and service life of the wind turbine. Currently, active ice melting and anti-icing measures for wind turbines mainly include manual deicing and hot air blowing. Manual deicing is a manual idling fan, which will only alleviate the icing on the blade surface. The method of blowing hot air is to remove the icing on the surface of the blade by sending hot air to the hollow blade, but in practice, it has the problems of large heat loss and long deicing cycle. Therefore, how to use automatic or manual control to start the deicing device according to the detected icing condition of the blades is a current and unsolved problem, which has great engineering application value.

Now, need a kind of deicing device of simple in structure, easy to use, heat loss, deicing fast wind-driven generator.

Contents of the invention

The purpose of the utility model is to provide an automatic deicing device for a wind power generator. The deicing system is simple in structure, easy to use, fast in deicing, good in deicing effect and less in heat loss.

The technical scheme of the utility model is:

The automatic deicing device for wind turbine blades includes multiple electric heating films and a deicing control system. Two layers of electric heating films are installed inside the blades corresponding to the position where the blade surface is prone to freezing. Each electric heating film is connected in parallel. A socket is provided on the hub of the blade, and the socket is connected to the film through a lead wire. An electric screw rod is arranged in the cabin of the wind generator, and the electric screw rod is connected to a plug through a connecting rod, and the plug is connected to the deicing control system through a wire.

The beneficial effects of the utility model are:

The automatic deicing device for the blades of the wind power generator of this new type has built-in double-layer parallel electric heating films in the parts prone to icing during the production process of the blades, and automatically deices through external control heating. This scheme has the advantages of simple structure, good deicing effect and high deicing speed. Each layer is used as an independent heating unit, and the double layer is connected in parallel to ensure the minimum range of failure and prolong the service life of deicing. The electric heating film is mainly to prevent the easy breakage of the heating wire during the production process, so as to prolong the life of the heating function and improve the efficiency of the blade.

Description of drawings

Fig. 1 is a cross-sectional view of the portion of the blade provided with the electric heating film of the present application.

Fig. 2 is a circuit diagram of the electric heating film of the present application.

Figure 3 is a schematic diagram of the structure of the electric heating film and the deicing control system.

Detailed ways

In order to overcome the above-mentioned defects and hazards, the utility model provides a method of adding a segmented built-in heating layer, that is, an electric heating film, in the place where it is easy to freeze by using large data accumulation in the production process of the blade, and it is started by external automatic or manual control. The design scheme of heating method deicing.

The specific structure is that the automatic deicing device of the wind turbine blade includes a plurality of electric heating films 1 and a deicing control system. The electric heating film 1 is arranged on the position where the corresponding surface of the blade 2 is easy to freeze. The electric heating film 1 is Two layers, each electric heating film 1 is connected in parallel, the hub of the blade 2 is provided with a socket 3, the socket 3 is connected with the electric heating film 1 through a lead wire, and an electric screw rod 4 is provided in the cabin of the wind power generator. The electric screw mandrel 4 is connected with the plug 6 through the connecting rod 5, and the plug 6 is connected with the deicing control system.

The following describes the deicing device in detail in conjunction with the accompanying drawings:

As shown in Figure 1, Figure 2, and Figure 3, the deicing device adopts a parallel connection method. During the blade manufacturing process, by adding an electric heating film material to the middle layer of the blade glass fiber reinforced composite material, the blade is easily There is a certain area of parallel double-layer electric heating film built in at the place where ice is formed. If ice is detected, the deicing control system can be activated manually or automatically to heat and melt the ice synchronously. Affected area. The two layers of electric heating film added in the middle are located close to the outer surface. When there is ice, the remote control system can be used to realize segmented control heating to eliminate local ice and eliminate possible quality and safety hazards. The electric heating film is mainly to prevent the easy breakage of the heating wire during the production process, so as to prolong the life of the heating function and improve the efficiency of the blade. Considering the working characteristics of the blade rotation, the connection between the electric heating film lead wire and the control system is realized by adding an electric screw to drive a coupling. When deicing is required, the blade needs to be reset and stopped at a specific initial position, so that The plug fixed on the electric screw rod and the socket fixed on the wheel hub are in the alignment position, and then the electric screw rod is activated by the control system to drive the plug and socket to connect together, and the control system and the heating film are connected to realize heating control. If the selected blade icing detection technology can realize local icing detection, it can also facilitate the realization of local deicing control of blades.

This deicing technology can adopt two optional control methods, manual and automatic, and uses the existing icing detection technology to form a blade icing judgment system through anemometers, temperature sensors, and control units. Automatic or manual deicing mode needs to be activated (different modes can be set directly through the control system) to realize manual or automatic deicing control.

Claims (1)

1. a kind of automatic deicer of blade of wind-driven generator, it is characterised in that：Including multiple electrical-heating films and deicing control System processed, the corresponding blade interior of the easy ice forming locations of blade surface are arranged two layers of electrical-heating film, between each electrical-heating film For parallel way, it is provided with socket on the wheel hub of the blade, socket is connect by lead with film, the cabin of wind-driven generator The interior electronic lead screw of setting, electronic lead screw are connect by connecting rod with plug, and plug is connect with deicing control system.