CN220081601U

CN220081601U - Air duct of blade deicing system of wind generating set

Info

Publication number: CN220081601U
Application number: CN202321636574.9U
Authority: CN
Inventors: 庄岳兴
Original assignee: Beijing Xinye New Energy Technology Co ltd
Current assignee: Beijing Xinye New Energy Technology Co ltd
Priority date: 2023-06-26
Filing date: 2023-06-26
Publication date: 2023-11-24
Anticipated expiration: 2033-06-26

Abstract

The utility model discloses an air duct of a blade deicing system of a wind generating set, which comprises a plurality of air ducts which are sequentially connected end to end along the heat energy conveying direction and are installed in a segmented mode, wherein the cross section of each air duct is D-shaped, an air vent is formed in the air duct along the axial direction of the air duct, and the air duct is of a cone structure with the cross section size gradually reduced along the heat energy conveying direction. The D-shaped air duct structure is designed, the installation is convenient and simple, even if the blade tip is in a small space area, for the area where the air duct with the traditional annular structure cannot reach, the bottom surface of the air duct is tightly adhered to the bottom of the blade web by means of a rod-type installation tool and epoxy structural adhesive, the air duct is firmly installed in place, the installation reliability of the air duct is improved, the air duct can extend to the position where the blade tip needs to be deiced, heat energy is directly input to the position where the deicing needs to be performed through the air duct, and the working efficiency of a deicing system is improved.

Description

Air duct of blade deicing system of wind generating set

Technical Field

The utility model relates to the technical field of wind power generation, in particular to an air duct of a blade deicing system of a wind generating set.

Background

The blade of the large in-service wind generating set in many areas is extremely easy to generate icing in winter. Once the blades are frozen, the safety of the operation of the blades can be seriously affected, and the shutdown caused by the freezing can bring about larger economic loss for the wind farm. At present, a blade deicing system of a wind generating set mainly comprises a hot air flow deicing system and an electric heating film deicing system. The electric heating film deicing system has an unclear prospect due to lightning strike, and the hot air flow deicing system is stable and reliable. The deicing work efficiency of the hot air flow deicing system which is installed at present cannot meet the requirements, particularly in the region with serious icing, the deicing cannot be effectively performed, particularly the icing in the blade tip region cannot be removed, and thus the power generation performance of the wind generating set of the wind power plant is affected.

The hot air flow deicing system transmits hot air flow to positions, such as the front edges of blades, needing deicing through the air guide pipe, so that reasonable arrangement of the air guide pipe is important to improving the working efficiency of the hot air flow deicing system. As the blade tip area is the part with the greatest contribution of the aerodynamic efficiency of the whole blade, and the blade tip is the area with the most serious icing, once the blade tip is frozen, the unit operates with larger vibration, and besides influencing the generated energy, the safety of the blade structure can be seriously endangered, so that larger potential safety hazard is brought to the unit operation.

At present, the section of the existing air duct is in a circular ring shape, the air duct is fixed at the bottom of a blade web plate through a pipe hoop, and the installation process is complex. Moreover, because the space of the inner cavity of the blade is narrow, the space of the inner cavity of the blade is narrow toward the tip of the blade, and the region where the pipe hoop cannot be installed by constructors, and the air duct cannot be installed. Therefore, the existing air duct can only be installed at the position which can be related to constructors, so that the installation length and the position of the air duct are limited, the air duct cannot be directly communicated to the position which needs deicing, and the working efficiency of the hot air flow deicing system is reduced. On the other hand, when the air duct is fixed at the bottom of the blade web through the pipe hoop, the air duct is often caused to fall off due to the fact that the blade rotates to generate a large centrifugal force, the installation reliability of the air duct is low, the deicing system cannot effectively operate, and the blade is damaged.

Disclosure of Invention

Aiming at the problems, the utility model aims to provide the air duct of the blade deicing system of the wind generating set, so as to solve the problems of low working efficiency of the deicing system and low installation reliability of the air duct caused by the fact that the existing air duct is limited by space and cannot be directly communicated to a position needing deicing when being installed.

The utility model is realized in the following way:

the utility model provides a wind generating set blade deicing system's air duct, includes a plurality of air ducts that meet end to end in proper order along heat energy direction of delivery, and every air duct's cross-sectional shape is the D shape, all offers the air vent along its axial on every air duct, is linked together between each air vent, and the air duct sets up to the cone structure that reduces gradually along heat energy direction of delivery upper section size.

Further, the plurality of air ducts comprise a first air duct, a second air duct and a third air duct which are sequentially connected end to end along the heat energy conveying direction.

Further, the number of the second air guide pipes is multiple, the shapes of the second air guide pipes are similar, the sizes of the second air guide pipes gradually decrease along the heat energy conveying direction, and the second air guide pipes are changed along with the shape of the inner cavity of the blade.

Further, one end of the first air duct connected with the second air duct is provided with a first conical groove.

Further, one end of the third air duct connected with the second air duct is convexly provided with a first conical boss.

Further, one end of the second air duct is convexly provided with a second conical boss, the other end of the second air duct is provided with a second conical groove, the second conical boss is inserted into the first conical groove of the first air duct connected with the second conical boss or the second conical groove of the last second air duct connected with the second conical boss, and the second conical groove is clamped outside the first conical boss of the third air duct connected with the second conical groove or the second conical boss of the next second air duct connected with the second conical groove.

Further, a plurality of exhaust holes are formed in each air duct, the exhaust holes are arranged in the length direction of the air duct, and the distance between two adjacent exhaust holes is gradually reduced in the heat energy conveying direction.

Further, each air duct comprises a bottom surface and an arc surface, the bottom surface is of a three-layer triaxial glass fiber cloth structure, and the arc surface is of a two-layer triaxial glass fiber cloth structure.

Furthermore, the air duct is formed by pressing a mould, and a layer of demoulding cloth is solidified on the outer side of the bottom surface of the air duct.

Furthermore, a layer of heat insulation film is also arranged in the inner cavity of the air duct.

The beneficial effects of the utility model are as follows:

the air duct of the blade deicing system of the wind generating set is designed in a D-shaped air duct structure, is convenient and simple to install, even if the blade tip is in a small space area, for the area where the air duct of the traditional annular structure cannot reach, the bottom surface of the air duct is tightly adhered to the bottom of the blade web by means of a rod type installation tool and epoxy structural adhesive, so that the air duct is firmly installed in place, the installation reliability of the air duct is improved, the air duct can be extended to the position where the blade tip needs to be deicing, and heat energy is directly input to the position where the deicing needs to be performed through the air duct, thereby improving the working efficiency of the deicing system.

Drawings

FIG. 1 is a schematic view showing an assembled use state of a plurality of air ducts according to the present utility model;

FIG. 2 is a schematic view of the structure of the multiple air ducts before assembly;

FIG. 3 is a front cross-sectional view of a first airway tube of the present utility model;

FIG. 4 is a front cross-sectional view of a second airway tube of the present utility model;

fig. 5 is a front cross-sectional view of a third airway tube of the present utility model.

Reference numerals illustrate:

1. a first air duct; 11. a first tapered recess; 2. a second air duct; 21. a second tapered boss; 22. a second tapered recess; 3. a third air duct; 31. a first tapered boss; 4. a vent hole; 5. and an exhaust hole.

Detailed Description

The technical solutions in the embodiments of the present utility model are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

As shown in fig. 1, the air duct of the blade deicing system of the wind generating set comprises a plurality of air ducts which are sequentially connected end to end along the heat energy conveying direction, the cross section of each air duct is D-shaped, the air ducts are provided with vent holes 4 along the axial direction, the vent holes 4 are communicated with each other, and the air ducts are of cone structures with the cross section size gradually reduced along the heat energy conveying direction.

As shown in fig. 1, the plurality of air ducts include a first air duct 1, a second air duct 2 and a third air duct 3 which are sequentially connected end to end along the heat energy conveying direction, and so on, so as to meet the deicing requirement of the blade. The multiple air ducts are installed in a sectional mode, so that the assembly and the disassembly are convenient, and the transportation is also convenient. In particular, the thermal energy transport direction refers to the direction indicated by the arrow in the figure. Wherein, the inlet end of the first air duct 1 is communicated with a heat source for introducing heat energy into the air duct. The third air duct 3 is the last air duct located at the tip position of the blade, and the outlet end of the third air duct 3 is communicated with the cavity at the front edge of the blade and is used for conveying heat energy into the cavity at the front edge of the blade to carry out deicing operation. The number of the second air guide pipes 2 is multiple, the shapes of the second air guide pipes 2 are similar, the sizes of the second air guide pipes 2 are gradually reduced along the heat energy conveying direction, and the second air guide pipes 2 are connected end to end and located between the first air guide pipes 1 and the second air guide pipes 2. That is, the plurality of second air ducts 2 are similar in pattern, and the patterns are identical in shape but not identical in size. In this embodiment, the first air duct 1, the second air duct 2 and the third air duct 3 are all in cone structures and have D-shaped cross sections, and the sizes of the air ducts connected with each other along the conveying direction of heat energy are gradually reduced and are changed according to the shape of the inner cavity of the blade. The first air duct 1, the second air duct 2 and the third air duct 3 are respectively provided with vent holes 4 along the axial direction, and the positions and the sizes of the vent holes 4 are matched and are communicated after being assembled. Through the air vent 4 that the intercommunication set up, heat energy flows through first air duct 1, a plurality of second air duct 2 and third air duct 3 in proper order and is finally carried the position that needs deicing in the cavity of blade leading edge.

The direction indicated by the arrow in fig. 2 is the transport direction of the thermal energy. As shown in fig. 2 to 5, a first conical groove 11 is formed at one end of the first air duct 1 connected with the second air duct 2, and in this embodiment, the first conical groove 11 is located at the outlet end of the first air duct 1. One end of the third air duct 3 connected with the second air duct 2 is convexly provided with a first conical boss 31. In this embodiment, the first tapered boss 31 is located at the inlet end of the third air duct 3. The number of the second air guide pipes 2 is multiple, one end of each second air guide pipe 2 is convexly provided with a second conical boss 21, and the other end of each second air guide pipe 2 is provided with a second conical groove 22. The second conical boss 21 is inserted into the first conical groove 11 of the first air duct 1 connected with the second conical boss, or the second conical groove 22 of the last second air duct 2 connected with the second conical boss, and the second conical groove 22 is clamped on the outer side of the first conical boss 31 of the third air duct 3 connected with the second conical boss or the outer side of the second conical boss 21 of the next second air duct 2 connected with the second conical boss. Specifically, the second air duct 2 connected with the first air duct 1 is defined as a first second air duct 2, the second air duct 2 connected with the third air duct 3 is defined as a last second air duct 2, and the rest of the second air ducts 2 are located between the first second air duct 2 and the last second air duct 2 and are connected with each other. In this embodiment, the second tapered bosses 21 of the first second air duct 2 are inserted into the first tapered grooves 11 of the first air duct 1, and the second tapered bosses 21 of the other second air ducts 2 are inserted into the second tapered grooves 22 of the last second air duct 2 adjacent thereto. The second conical grooves 22 of the last second air duct 2 are clamped outside the first conical boss 31 of the third air duct 3, and the second conical grooves 22 of other second air ducts 2 are clamped outside the second conical boss 21 of the next second air duct 2 adjacent to the second conical grooves. In addition, structural adhesive can be smeared at the assembling part when each air duct is inserted, so that the connection between the air ducts is firmer.

As shown in fig. 1 and 2, each air duct is provided with a plurality of air vents 5, the air vents 5 are arranged along the length direction of the air duct, and the distance between two adjacent air vents 5 is gradually reduced along the heat energy conveying direction. In this embodiment, the exhaust holes 5 are arranged in the conveying direction of the heat energy, and the number of the specific exhaust holes 5 is calculated by thermal conduction analysis based on the shape and length of the blade. The exhaust hole 5 is used for discharging a part of heat energy from the air duct, so that the heat energy is output along the conveying path in the conveying process, and a certain amount of heat is kept near the conveying passage, so that the icing condition of the front edge of the blade is reduced. Specifically, the exhaust hole 5 penetrates through the cambered surface of the air duct, the arrangement of the exhaust hole 5 gradually changes from sparse to dense along the heat energy conveying direction, namely, the distance between two adjacent exhaust holes 5 close to the outlet end of the third air duct 3 is minimum, and the distance between two adjacent exhaust holes 5 is smaller than the distance between two adjacent exhaust holes 5 on each second air duct 2 and smaller than the distance between two adjacent exhaust holes 5 on the first air duct 1. In this embodiment, the first air duct 1 may not be provided with the air vent 5, or one or more air vents 5 may be provided, and the number of specific air vents 5 may be set according to actual needs, which is not limited herein. In particular, a greater number of exhaust holes 5 are arranged near the position to be de-iced, and the distance between the exhaust holes 5 is smaller when the distance is closer to the position to be de-iced, so that more heat energy can be conveniently discharged to the region to be de-iced, and the ice is reduced.

The air duct of each D-shaped structure comprises a bottom surface and an arc surface, wherein the bottom surface is of a three-layer triaxial glass fiber cloth structure, and the arc surface is of a two-layer triaxial glass fiber cloth structure. In this embodiment, the three axial directions are 0 °, 45 °, and 90 °, respectively. The air duct is formed by pressing a mould, a layer of release cloth is further solidified on the outer side of the bottom surface of the air duct, and a rough surface is formed after solidification and forming, so that the air duct is convenient to combine with other objects. The inner cavities of the air guide pipes are also provided with a layer of heat insulation film, namely the inner cavities of the first air guide pipe 1, the second air guide pipe 2 and the third air guide pipe 3 are uniformly provided with a layer of heat insulation film, so that the service life of the air guide pipe is prolonged.

In this embodiment, the air duct of the D-shaped structure is the same as the conventional annular air duct, and is mounted at the bottom of the blade web. The bottom surface of the air duct is a plane, and the bottom surface of the air duct is adhered to the bottom of the blade web plate through epoxy structural adhesive when the air duct is installed. When installing the air duct in blade web bottom, use epoxy adhesive to laminate its bottom surface and web bottom mutually and bond, make be the face contact between air duct and the web, replace the line contact between the air duct of preceding ring form cross-section and the web, combine the area increase between the two, combine more firmly, avoided the problem of easy droing after the air duct is installed in the past, ensured deicing system's reliability. Moreover, the D-shaped air duct is not required to be supported by using a pipe hoop, and the installation process is simple and convenient. When the pipe hoop cannot be installed in the region of the small inner space of the blade tip by an operator, the D-shaped air duct can be pushed into the position of the inner cavity of the blade tip to be deiced by means of a longer rod-type tool or other tools, and the bottom surface of the D-shaped air duct is pressed on the bottom of the blade web by the rod-type tool or other tools to enable the D-shaped air duct to be tightly attached to the bottom of the blade web. D shape air duct structural design, simple to operate, even the less space region of blade point portion, to the unable region that reaches of air duct of traditional ring form structure, as long as can put into air duct and rod-type instrument, alright with the help of the instrument with the firm installation of air duct in place, make the air duct can extend to the position that blade point portion needs the deicing, make heat energy directly input to the position that needs the deicing through the air duct, and then improve deicing system's work efficiency.

According to the air duct of the blade deicing system of the wind generating set, a plurality of sectional air ducts are assembled in a plugging mode during installation, then the bottom surface of the air duct is adhered to the bottom of a blade web plate, the inlet end of the first air duct 1 is communicated with a heat source, and the outlet end of the third air duct 3 is communicated with a position, where deicing is needed, of the front edge of the blade. For the region where the blade tip is small in space and the pipe hoop cannot be mounted by workers, a longer rod type tool or other tools are used for placing the air duct into the cavity, and then the bottom surface of the air duct is pressed to the bottom of the blade web through the rod type tool, so that the two are tightly attached to each other, and the mounting of the air duct is completed.

While the utility model has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit of the utility model, and it is intended to cover the utility model as defined in the appended claims.

Claims

1. The utility model provides an air duct of wind generating set blade deicing system, its characterized in that includes a plurality of air ducts that meet end to end in proper order along heat energy direction of delivery, every the cross-sectional shape of air duct is the D shape, every air duct is last all to offer air vent (4) along its axial, communicates each other between air vent (4), the air duct sets up to the cone structure that reduces gradually along heat energy direction of delivery upper section size.

2. The air duct of a wind turbine blade de-icing system according to claim 1, wherein the plurality of air ducts comprises a first air duct (1), a second air duct (2) and a third air duct (3) which are connected end to end in sequence along the thermal energy transport direction.

3. Wind turbine blade deicing system according to claim 2, characterized in that the number of second air ducts (2) is a plurality, the shape of a plurality of second air ducts (2) is similar, and the size of a plurality of second air ducts (2) gradually decreases along the thermal energy transport direction.

4. The air duct of a deicing system for blades of a wind turbine generator system according to claim 2, characterized in that one end of said first air duct (1) connected to said second air duct (2) is provided with a first conical groove (11).

5. The air duct of the deicing system for blades of wind turbine generator system according to claim 4, characterized in that one end of said third air duct (3) connected to said second air duct (2) is convexly provided with a first conical boss (31).

6. The air duct of the deicing system for blades of wind turbine generator system according to claim 5, wherein one end of said second air duct (2) is convexly provided with a second conical boss (21), and the other end is provided with a second conical groove (22), said second conical boss (21) is inserted into said first conical groove (11) of said first air duct (1) connected thereto or into said second conical groove (22) of the last said second air duct (2) connected thereto, said second conical groove (22) is clamped outside said first conical boss (31) of said third air duct (3) connected thereto or outside said second conical boss (21) of the next said second air duct (2) connected thereto.

7. Wind generating set blade deicing system air duct according to claim 1 or 2, characterized in that each air duct is provided with a plurality of air vents (5), a plurality of air vents (5) are arranged along the length direction of the air duct, and the distance between two adjacent air vents (5) is gradually reduced along the heat energy conveying direction.

8. The air duct of a wind turbine blade de-icing system according to claim 1 or 2, wherein each air duct comprises a bottom surface and an arc surface, the bottom surface is of a three-layer triaxial glass fiber cloth structure, and the arc surface is of a two-layer triaxial glass fiber cloth structure.

9. The air duct of a wind turbine blade de-icing system of claim 8, wherein the air duct is formed by compression molding, and a layer of release cloth is further cured on the outside of the bottom surface of the air duct.

10. The air duct of a wind turbine blade de-icing system of claim 1 or 2, wherein the air duct has an inner cavity further provided with a layer of heat insulating film.