CN219549046U

CN219549046U - Electrothermal deicing device

Info

Publication number: CN219549046U
Application number: CN202321337377.7U
Authority: CN
Inventors: 廖志勇; 文庆武; 缪昌志
Original assignee: Hunan Boyang New Energy Technology Co ltd
Current assignee: Hunan Boyang New Energy Technology Co ltd
Priority date: 2023-05-30
Filing date: 2023-05-30
Publication date: 2023-08-18
Anticipated expiration: 2033-05-30

Abstract

The utility model belongs to the technical field of generator blade deicing, and provides an electrothermal deicing device which comprises at least one electric heating film, an electric connecting piece and a power supply; the electric heating film is positioned on the outer surface of the blade of the wind generating set; the electric connecting piece is used for connecting the plurality of electric heating films electrically in sequence and then connecting the electric heating films with a power supply to form a single power supply heating loop, firstly, the plurality of electric heating films are arranged on the outer surface of the blade of the wind generating set, the problem that an electric heating deicing element of the blade cannot be installed after the existing wind generating set is installed is solved, and meanwhile, the plurality of electric heating films can be used for installing the position of the blade which is easy to freeze in a targeted manner, so that the cost is reduced; and secondly, the utility model also uses the electric connector to electrically connect a plurality of electric heating films in sequence to form a single power supply heating loop, thereby expanding the application range of the deicing device.

Description

Electrothermal deicing device

Technical Field

The utility model belongs to the technical field of generator blade deicing, and particularly relates to a film type electrothermal deicing device of a wind generating set.

Background

At present, the wind driven generator in China is usually installed in mountainous areas or elevations with high altitude, low temperature and high humidity, particularly in southern China, the wind driven generator is mostly located in the mountainous areas with high altitude, the outer surfaces of wind driven generator blades are extremely easy to cover ice along with the temperature reduction and the humidity increase in autumn and winter and spring, particularly in southern China, the wind driven generator blades are especially easy to freeze in winter, and the southern China is frozen with much frost and rain, and the icing is more serious than that in northern China. The fan is frozen to easily cause the fan operation power to be rapidly reduced or even shut down, and meanwhile, the fan operation vibration is possibly caused by the increase of the fan load due to the newly added mass to endanger the unit operation, so that a large amount of power generation loss is caused to a wind field by the fan freezing.

At present, wind power deicing technology is relatively mature, but certain defects still exist in actual use, such as:

1. the existing electrothermal deicing elements cannot be installed on the installed blades of the wind generating set

2. The existing wind generating set blade additionally provided with a heating film lacks reasonable power supply and electrical connection scheme

3. The traditional electrothermal deicing element cannot cover the die joint seam area of the front edge of the blade and is difficult to achieve rain erosion protection

Therefore, the membrane electrothermal deicing device of the wind generating set, which can solve any of the problems, is a technical problem to be solved urgently in the field.

Disclosure of Invention

In order to solve at least one technical problem, the utility model provides an electrothermal deicing device.

The utility model is realized in such a way that the electrothermal deicing device of the wind generating set comprises at least one electric heating film, an electric connecting piece and a power supply; the electric heating film is positioned on the outer surface of the blade of the wind generating set; and the electric connecting piece is used for connecting the plurality of electric heating films electrically in sequence and then connecting the electric heating films with a power supply to form a single-power-supply heating loop.

Optionally, the electrically heated film includes a bottom layer provided with a heating element and a surface layer with a protective material disposed over the heating element.

Optionally, the protective material is uniformly spread on the heating element.

Optionally, a front edge protective coating which is uniformly transited to the protective materials at the two sides is arranged at the front edge mold closing seam position of the blade.

Optionally, the electric heating film comprises a windward heating film positioned on the windward side of the blade of the wind generating set and a leeward heating film positioned at the front edge die clamping seam.

Optionally, the electrical connector comprises a windward electrode, a leeward electrode and an end electrode; the windward electrode is positioned at one end of the windward heating film, which is close to the blade root of the blade; the leeward electrode is positioned at one end of the leeward heating film, which is close to the blade root of the blade; the end electrode is positioned at one end of the windward heating film and one end of the leeward heating film, which are close to the blade tip of the blade.

Optionally, the shape of the windward heating film is a linear folded shape which is wide at one side close to the blade root and gradually narrows towards one side close to the blade tip.

Optionally, reserved connection areas for installing electronic elements are further arranged at two ends of the windward heating film and the leeward heating film.

Optionally, the electronic component mounting position in the reserved connection area is located below the heating element.

Optionally, the control module is connected with the power supply and used for controlling the on-off and/or power of the power supply.

The beneficial technical effects of implementing the utility model are as follows: firstly, a plurality of electric heating films are arranged on the outer surface of a blade of a wind generating set, so that the problem that an electrothermal deicing element of the blade cannot be installed after the existing wind generating set is installed is solved, and meanwhile, the positions of the blade easy to freeze can be installed in a targeted manner by using the plurality of electric heating films, so that the cost is reduced; and secondly, the electric heating films are electrically connected in sequence by using the electric connecting piece to form a single power supply heating loop, so that the electric heating film can be controlled to work better, and the energy consumption is reduced.

Drawings

FIG. 1 is a schematic view of a wind turbine blade;

FIG. 2 is a schematic view of a wind turbine blade deployed along a leading edge seam;

FIG. 3 is a schematic installation view of the present utility model;

FIG. 4 is a schematic view of a reserved splicing area of the present utility model;

FIG. 5 is a schematic view of the structure of the electrically heated film of the present utility model;

FIG. 6 is a schematic view of the installation of an electrically heated membrane blade of the utility model at the leading edge;

fig. 7 is a schematic view of the electronic component mounting of the present utility model.

In the figure: 1. an electrically heated film; 101. a heating element; 102. a protective material; 103. a leading edge protective coating; 11. heating the film on the windward side; 12. heating the film on the lee side; 2. an electrical connection; 21. a windward electrode; 22. a leeward electrode; 23. an end electrode; 3. reserving a splicing area; 4. a blade; 41. a windward side; 42. a lee surface; 43. a front edge die joint; 44. a blade tip; 45. blade root.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" means two or more, and the meaning of "a number" means one or more.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1-5, the present utility model provides an electrothermal ice detachment apparatus for a wind turbine, optionally including but not limited to at least one electrically heated film 1, an electrical connection member 2, and a power source; the electric heating film 1 is positioned on the outer surface of the blade of the wind generating set; and the electric connector 2 is used for connecting the plurality of electric heating films 1 electrically in sequence and then connecting the electric connector with a power supply to form a single power supply heating loop.

In this embodiment, the electrothermal deicing device for the wind generating set is provided, when the deicing device is required to be installed on the installed wind generating set blade, firstly, the wind generating set is closed to enable the blade to be in a static state, then, a plurality of electric heating films 1 are installed on the outer surface of the blade, preferably in a position easy to freeze, and then, the electric connecting pieces 2 are utilized to electrically connect the plurality of electric heating films 1 in sequence and then are connected with a power supply, so that a single power supply heating loop can be formed to heat and complete deicing operation. Compared with the mode of integral molding in the prior art, the method can realize the installation of the installed wind generating set blade; meanwhile, the electric heating film 1 is formed into a single power supply heating loop by the electric connector 2, so that the power supply connection is facilitated.

It should be noted that the power source may be electric power generated by the wind power generator itself or an external power source, as long as it can provide electric power for the electric heating film 1. The size, shape, number, etc. of the electric heating film 1 can be arbitrarily set by those skilled in the art according to practical situations, as long as it can effectively cover the outer surface of the blade, especially the outer surface of the ice prone position.

Specifically, the single-power-supply heating loop can be a two-phase 690V heating loop, and under 690V voltage output, the heating deicing effect of the electric heating film 1 can be effectively ensured, and meanwhile, the energy consumption is reduced.

Preferably, the electrically heated film 1, optionally but not limited to, comprises a bottom layer provided with a heating element 101 and a surface layer with a protective material 102 provided above the heating element 101.

In particular, in this embodiment, a preferred embodiment of an electrically heated membrane 1 is presented, on the one hand the underlying heating element 101 providing heat to the blade in contact therewith, achieving a deicing effect; on the other hand, the protective material 102 on the surface layer can protect the heating element 101, prevent the damage and influence of rain erosion and wind erosion on the heating element 101 and the blades, and ensure the normal use of the heating element 101.

More specifically, the heating element 101 may be, but is not limited to, carbon fiber cloth, graphene, carbon glass, or other materials. More specifically, the carbon fiber cloth and other materials can be selected but not limited to being made in a + -45 ℃ biaxial weaving mode.

In this embodiment, a preferable example of the material and arrangement of the heating element 101 is given, and the carbon fiber cloth is adopted to be arranged in a double-shaft braiding manner at ±45 ℃, which is beneficial to solving the heating uniformity problem of the electrothermal film.

More preferably, as shown in fig. 5, the protective material 102 may be distributed in an optional but not limited manner by being uniformly spread over the heating element 101.

In this embodiment, a preferred embodiment of the arrangement of the protective material 102 is given, i.e. the protective material 102 is evenly spread over the heating element 101 in all positions with a certain thickness to protect the heating element 101 and the blade in this area.

More preferably, as shown in fig. 6, a leading edge protective coating 103 is provided at the blade leading edge joint position, which uniformly transitions to the both side protective materials 102. Preferably, the front edge protective coating 103 is higher than the protective material 102, so that the rainwater can conveniently fall down, the residence time of rainwater and the like is further reduced, erosion damage is reduced, and the service life is prolonged.

In this embodiment, since the blade will collide with the rain water or the dust in the air at a high speed during the running process, the leading edge of the blade is easy to corrode, so another preferred embodiment of the arrangement mode of the protective material 102 is provided, that is, a certain width area is reserved above the leeward heating film 12 paved at the front edge mold clamping seam position, the protective material 102 is not paved, and the area without the protective material 102 is scraped with the front edge protective coating 103 after the leeward heating film 12 is paved, so that the protective capability of the front edge area of the blade is enhanced, and the damage of the front edge rain erosion and wind erosion to the heating film is reduced.

Specifically, the main material of the leading edge protective paint 103 is polyurethane.

In this embodiment, a preferable example of the coating mode of the leading edge protective paint 103 is given, the first coating, the blade surface is roughened by polishing, then the paint is ejected using a glue gun, and then scraped off with a scraper; after the blade is naturally cured for 60min, the operation is repeated for the second coating, and the surface of the coating is pressed by hands without marks, so that the coating has slightly sticky touch feeling.

Preferably, the electric heating film 1 comprises a windward heating film 11 positioned on the windward side of the blade of the wind generating set and a leeward heating film 12 positioned at the front edge die clamping seam.

In this embodiment, a preferred embodiment of the present utility model is provided, when a deicing device is required to be installed on the installed blade of the wind turbine generator set, the wind turbine generator is first turned off to make the blade be in a static state, then the windward heating film 11 is installed on the windward side of the blade, the leeward heating film 12 is installed on the front edge die joint, and the windward heating film 11 and the leeward heating film 12 are electrically connected in sequence by using the electrical connector 2 to form a single power supply heating loop with a power supply, and the windward heating film 11 and the leeward heating film 12 are controlled by operating an external power supply when in use.

Preferably, as shown in fig. 3, the electrical connector 2 comprises a windward electrode 21, a leeward electrode 22 and an end electrode 23; the windward electrode 21 is positioned at one end of the windward heating film 11 close to the blade root of the blade; a leeward electrode 22 positioned at one end of the leeward heating film 12 near the blade root of the blade; and the end electrode 23 is positioned at one end of the windward heating film 11 and the leeward heating film 12 close to the blade tip.

Specifically, the windward electrode 21 is used for forming a heating circuit, and inputs electric energy to an input circuit of the windward heating film 11; the leeward electrode 22 is used to form an output circuit for outputting electric power from the leeward heating film 12 in the heating circuit; the end electrode 23 is used for connecting the windward heating film 11 and the leeward heating film 12 to form a transmission circuit for transmitting electric energy of the windward heating film 11 into the leeward heating film 12 in the heating circuit.

More specifically, the windward electrode 21, the leeward electrode 22 and the end electrode 23 are all installed in a concealed mode of opening holes in the blade shell, so that equipment wiring is convenient to install.

More preferably, the windward heating film 11 is optionally, but not limited to, a linearly tapered shape that is wide on the side near the blade root and gradually narrows toward the side near the blade tip.

Specifically, because wind speeds of different positions of the blade of the wind generating set are in a direct proportion relation with the distance between the blade and the blade root, the wind speed and heat exchange of the blade tip area are larger than those of the blade tip part when the blade operates, and the power required for deicing the blade tip position is higher than that of the blade root position, so that the wind facing heating film 11 is in a linearly folded shape which is wide at one side close to the blade root and gradually narrows towards one side close to the blade tip, the power density of the heating film at the blade tip position is improved, and the deicing effect is improved.

More preferably, the two ends of the windward heating film 11 and the leeward heating film 12 are also provided with reserved leading areas 3 for installing electronic components.

Specifically, electronic elements such as a temperature sensor and/or a humidity sensor are installed in the reserved leading area 3, the electronic elements such as the temperature sensor and/or the humidity sensor are used for monitoring information such as temperature and humidity of the environment where the wind generating set blades are located, and the monitored data are used for better adjusting the temperature and the duration of the windward heating film 11 and the leeward heating film 12.

More preferably, the electronic component mounting position in the reserved connection area 3 is located below the heating element 101.

Specifically, electronic components such as a temperature sensor and/or a humidity sensor are arranged at the lower part of the bottom layer heating element 101, the protective material 102 is arranged at the upper layer of the bottom layer heating element 101, cables of the electronic components such as the temperature sensor and/or the humidity sensor are led out from the side surface of the bottom layer heating element 101, and the electronic components such as the temperature sensor and/or the humidity sensor can be in the forms of optical fibers, resistors and the like.

Preferably, the deicing device further optionally, but not limited to, comprises a control module, connected to the power supply, for controlling the on/off and/or power of the power supply.

In this embodiment, the control module can be added to control the on/off and/or power of the power supply, so as to control the working state of the electric heating film 1. The operator can adaptively control the deicing device according to the field temperature, deicing requirements and the like, and the deicing device meets the current deicing requirements on the basis of energy conservation and consumption reduction. For example, the external control device may be optionally, but not limited to, a PLC, etc., and is selected for the conventional technology in the field, so that the description thereof will not be repeated here.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The electrothermal deicing device of the wind generating set is characterized by comprising at least one electric heating film (1), an electric connecting piece (2) and a power supply;

the electric heating film (1) is positioned on the outer surface of the blade of the wind generating set;

and the electric connecting piece (2) is used for connecting the plurality of electric heating films (1) electrically in sequence and then connecting the electric heating films with a power supply to form a single-power-supply heating loop.

2. An electrothermal deicing device according to claim 1, characterized in that the electrically heated film (1) comprises a bottom layer provided with a heating element (101) and a surface layer provided above the heating element (101) with a protective material (102).

3. An electrothermal deicing apparatus according to claim 2, wherein the protective material (102) is uniformly laid on the heating element (101).

4. A device according to claim 3, characterized in that a front edge protective coating (103) is provided at the blade front edge seam, which is uniformly transited to the protective material (102) on both sides.

5. An electrothermal deicing apparatus according to claim 1, wherein the electrically heated film (1) comprises a windward heating film (11) located on the windward side of a wind turbine blade and a leeward heating film (12) located at a leading edge seam.

6. An electrothermal deicing apparatus according to claim 5, wherein the electrical connection (2) comprises a windward electrode (21), a leeward electrode (22) and an end electrode (23);

the windward electrode (21) is positioned at one end of the windward heating film (11) close to the blade root;

a leeward electrode (22) which is positioned at one end of the leeward heating film (12) close to the blade root of the blade;

and the end electrode (23) is positioned at one end of the windward heating film (11) and the leeward heating film (12) close to the blade tip.

7. An electrothermal deicing apparatus according to claim 6, wherein the windward heating film (11) has a shape of a linear fold that is wide on a side near the blade root and gradually narrows toward a side near the blade tip.

8. Electrothermal deicing device according to claim 7, wherein the windward heating film (11) and the leeward heating film (12) are further provided with reserved connection areas (3) at both ends for mounting electronic components.

9. An electrothermal deicing apparatus according to claim 8, wherein the electronic component mounting location in the reserved connection area (3) is located below the heating element (101).

10. An electrothermal ice detachment apparatus according to claim 9, further comprising a control module coupled to the power source for controlling on/off and/or power of the power source.