Blade section of power generation fan

Abstract

A blade section of a power generation fan comprises an upper blade and a lower blade which are arranged in a matched mode, and a positioning piece is arranged between the upper blade and the lower blade. A plurality of upper connecting rib plates are arranged on the inner side of the upper blade, a plurality of upper mounting strip-shaped holes are formed in the upper connecting rib plates, a plurality of lower connecting rib plates are arranged on the inner side of the lower blade, and a plurality of lower mounting strip-shaped holes are formed in the lower connecting rib plates; an upper strip-shaped plate is arranged in the upper mounting strip-shaped hole, and a lower strip-shaped plate is arranged in the lower mounting strip-shaped hole; and an inner connecting piece is arranged between the upper strip-shaped plate and the lower strip-shaped plate. The mode that the upper strip-shaped plate is fixedly connected with the upper blade body and the lower strip-shaped plate is fixedly connected with the lower blade body is adopted, the upper strip-shaped plate and the lower strip-shaped plate have flexibility, and then the inner connecting pieces are arranged in the upper strip-shaped plate and the lower strip-shaped plate, so that the flexibility of the obtained blade is greatly improved; and better non-deformability can be achieved.

Description

Technical Field

[0001] This application relates to a blade segment of a power generation fan. Background Art

[0002] Power generation fans are the core of the development of wind power technology, and the energy harvesting component at the core of power generation fans is the fan blade. Many current studies focus on how to set the blade cross-section to improve the blade's ability to utilize wind energy. However, safety factors remain the most crucial aspects to be concerned about. Currently, fan blades are generally formed integrally and then transported later, mainly to ensure the structural stability of the fan blades. To ensure their structural stability, a support framework is usually arranged inside the fan blade. Generally, a main shaft is set on the central axis, and several auxiliary support rods are arranged on the main shaft. The other ends of the auxiliary support rods are in contact with the inner side of the fan blade to ensure its structural stability. However, this structural setting method does not consider the stress characteristics of the blade, and the overall mass of the support assembly is relatively high, which in turn affects the structural stability of the fan blade. Summary of the Invention

[0003] To solve the above problems, this application proposes a blade segment of a power generation fan, which includes a cooperating upper blade and a lower blade, and a positioning member is arranged between the upper blade and the lower blade; several upper connecting rib plates are arranged on the inner side of the upper blade, and several upper installation strip holes are arranged on the upper connecting rib plates; several lower connecting rib plates are arranged on the inner side of the lower blade, and several lower installation strip holes are arranged on the lower connecting rib plates; an upper strip plate is arranged in the upper installation strip holes, and a lower strip plate is arranged in the lower installation strip holes; an inner connecting member is arranged between the upper strip plate and the lower strip plate. This application uses the method of fixedly connecting the upper blade with the upper strip plate and the lower blade with the lower strip plate. Since the upper strip plate and the lower strip plate are flexible by themselves and an inner connecting member is arranged inside, the flexibility of the blade obtained in this application is greatly improved. When subjected to a lateral force, compared with the existing inner framework structure, it can have better anti-deformation ability.

[0004] Preferably, the inner connecting member includes an upper connecting sub-rod and a lower connecting sub-rod, and several elastic connecting members are arranged between the upper connecting sub-rod and the lower connecting sub-rod;

[0005] Several upper auxiliary rods are arranged between the upper connecting sub-rod and the relatively arranged upper strip plate; several lower auxiliary rods are arranged between the lower connecting sub-rod and the relatively arranged lower strip plate.

[0006] Preferably, the elastic connecting member includes a central plate located in the middle. An upper auxiliary spring is arranged on one side of the central plate facing the upper connecting rod, and the upper auxiliary spring is connected to the upper connecting rod; a lower auxiliary spring is arranged on one side of the central plate facing the lower connecting rod, and the lower auxiliary spring is connected to the lower connecting rod. Through the structural form of the upper auxiliary spring, the lower auxiliary spring and the central plate in the middle, the upper strip plate and the lower strip plate can be connected into one body, ensuring the flexible connection between the upper and lower blades. Even if deformation occurs, it can have a good anti-bending effect.

[0007] Preferably, the K values of the lower auxiliary spring and the upper auxiliary spring are the same, and the K value is 200 - 400 N / m.

[0008] Preferably, the upper strip plate and the lower strip plate are aluminum plates, and the width of the aluminum plate is not less than 25 mm, and the thickness is 1.5 - 3 mm.

[0009] Preferably, the upper connecting rib plate includes an upper connecting annular plate connected to the upper blade. A vertical slit is arranged on the side of the upper connecting annular plate facing the lower blade. The upper side of the upper auxiliary rod is connected to the upper strip plate through a vertical connecting rod arranged in the vertical slit.

[0010] Preferably, the lower connecting rib plate includes a lower connecting annular plate connected to the lower blade. A horizontal slit is arranged on the side of the lower connecting annular plate. The lower auxiliary rod is connected to the lower strip plate through a horizontal connecting rod arranged in the horizontal slit.

[0011] Preferably, the positioning member includes a plugging groove arranged on one of the upper blade and the lower blade, and a plugging protrusion arranged on the other and cooperating with the plugging groove. In this application, the upper connecting rib plate and the lower connecting rib plate are respectively connected by a horizontal connecting rod and a vertical connecting rod, which has a self-locking effect and the directions of force deformation are inconsistent, so as to improve the structural stability.

[0012] Preferably, the plugging protrusion is abutted and arranged in the plugging groove, and the upper blade and the lower blade are fixedly connected by welding.

[0013] Preferably, it is obtained by processing according to the following steps:

[0014] Process the upper blade and the lower blade;

[0015] Respectively arrange the upper connecting rib plate on the upper blade and the lower connecting rib plate on the lower blade;

[0016] Respectively arrange the upper strip plate in the upper mounting strip hole of the upper connecting rib plate and the lower strip plate in the lower mounting strip hole of the lower connecting rib plate;

[0017] An upper connecting sub-bar is arranged on the corresponding upper strip board, and a lower connecting sub-bar is arranged on the corresponding lower strip board;

[0018] Connect the upper auxiliary spring of the elastic member to the upper connecting sub-bar or connect the lower auxiliary spring to the lower connecting sub-bar;

[0019] Then, after the upper blade and the lower blade are abutted, the other side of the elastic member is completed for connection;

[0020] Finally, the upper blade and the lower blade are hot melt welded to obtain a blade segment.

[0021] The present application can bring the following beneficial effects:

[0022] 1. The present application adopts the method of fixing and connecting the upper blade with the upper strip board and the lower blade with the lower strip board. Since the upper strip board and the lower strip board are flexible by themselves and the internal connecting members are arranged inside, the flexibility of the blade obtained by the present application is greatly improved. When subjected to a lateral force, compared with the existing internal framework structure, it can have better anti-deformation ability.

[0023] 2. Through the structural form of the upper auxiliary spring, the lower auxiliary spring and the central plate in the middle, the present application can connect the upper strip board and the lower strip board into one body, ensuring the flexible connection between the upper and lower blades. Even if deformation occurs, it can also have a good anti-bending effect.

[0024] 3. For the upper connecting rib plate and the lower connecting rib plate, the present application respectively adopts the method of connecting them with a transverse connecting rod and a vertical connecting rod, so that it has a self-locking effect and the directions of force deformation are inconsistent, thereby improving the structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0026] Figure 1 is a schematic structural diagram of the present application;

[0027] Figure 2 is Figure 1 an enlarged schematic view of part A of

[0028] Figure 3 is Figure 1 an enlarged schematic view of part B of

[0029] Figure 4 is a schematic structural diagram of the elastic connecting member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To clearly illustrate the technical features of this solution, the present application will be described in detail below through specific embodiments and in conjunction with its accompanying drawings.

[0031] In the first embodiment, as Figure 1 shown, a power generation wind turbine blade section includes a cooperatively arranged upper blade 1 and a lower blade 2, and a positioning member 3 is arranged between the upper blade 1 and the lower blade 2; a plurality of upper connecting rib plates 4 are arranged inside the upper blade 1, and a plurality of upper mounting strip holes 5 are arranged on the upper connecting rib plates 4; a plurality of lower connecting rib plates 6 are arranged inside the lower blade 2, and a plurality of lower mounting strip holes 7 are arranged on the lower connecting rib plates 6; an upper strip plate 8 is arranged in the upper mounting strip holes 5, and a lower strip plate 9 is arranged in the lower mounting strip holes 7; an inner connecting member 10 is arranged between the upper strip plate 8 and the lower strip plate 9.

[0032] In the present application, the blade is arranged to be assembled on both sides. Inside the upper blade 1, upper connecting rib plates 4 are arranged and upper strip plates 8 are arranged therein; inside the lower blade 2, lower connecting rib plates 6 are arranged and lower strip plates 9 are arranged therein, and then the upper strip plate 8 and the lower strip plate 9 are connected by arranging an inner connecting member 10, thus completing the final structural assembly.

[0033] In the second embodiment, as Figures 1-4 shown, a power generation wind turbine blade section includes a cooperatively arranged upper blade 1 and a lower blade 2, and a positioning member 3 is arranged between the upper blade 1 and the lower blade 2; a plurality of upper connecting rib plates 4 are arranged inside the upper blade 1, and a plurality of upper mounting strip holes 5 are arranged on the upper connecting rib plates 4; a plurality of lower connecting rib plates 6 are arranged inside the lower blade 2, and a plurality of lower mounting strip holes 7 are arranged on the lower connecting rib plates 6; an upper strip plate 8 is arranged in the upper mounting strip holes 5, and a lower strip plate 9 is arranged in the lower mounting strip holes 7; an inner connecting member 10 is arranged between the upper strip plate 8 and the lower strip plate 9.

[0034] The inner connecting member 10 includes an upper connecting sub-rod 11 and a lower connecting sub-rod 12, and a plurality of elastic connecting members 13 are arranged between the upper connecting sub-rod 11 and the lower connecting sub-rod 12; a plurality of upper auxiliary rods 14 are arranged between the upper connecting sub-rod 11 and the relatively arranged upper strip plate 8; a plurality of lower auxiliary rods 15 are arranged between the lower connecting sub-rod 12 and the relatively arranged lower strip plate 9. The elastic connecting member 13 includes a central plate 16 at the middle, an upper auxiliary spring 17 is arranged on one side of the central plate 16 facing the upper connecting sub-rod 11, and the upper auxiliary spring 17 is connected to the upper connecting sub-rod 11; a lower auxiliary spring 18 is arranged on one side of the central plate 16 facing the lower connecting sub-rod 12, and the lower auxiliary spring 18 is connected to the lower connecting sub-rod 12.

[0035] The K values of the lower auxiliary spring 18 and the upper auxiliary spring 17 are the same, and the K value is 200 - 400 N / m. The upper strip plate 8 and the lower strip plate 9 are aluminum plates, the width of the aluminum plate is not less than 25 mm, and the thickness is 1.5 - 3 mm. The upper connecting rib plate 4 includes an upper connecting annular plate 21 connected to the upper blade 1. On the side of the upper connecting annular plate 21 facing the lower blade 2, a vertical slit 22 is provided. The side of the upper auxiliary rod 14 facing the upper blade 1 is connected to the upper strip plate through a vertical connecting rod 26 arranged in the vertical slit 22. The lower connecting rib plate 6 includes a lower connecting annular plate 23 connected to the lower blade 2. On the side of the lower connecting annular plate 23, a horizontal slit 24 is provided. The lower auxiliary rod 15 is connected to the lower strip plate 9 through a horizontal connecting rod 25 arranged in the horizontal slit 24.

[0036] The positioning member 3 includes a plug-in groove provided on one of the upper blade 1 and the lower blade 2, and a plug-in protrusion provided on the other and cooperating with the plug-in groove. The plug-in protrusion is abutted and arranged in the plug-in groove, and the upper blade 1 and the lower blade 2 are fixedly connected by welding.

[0037] The blades of this application are obtained by an assembly method of first processing separately and then performing internal connection processing. Inside the upper blade 1, an upper connecting rib plate 4 is provided and an upper strip plate 8 is arranged therein; inside the lower blade 2, a lower connecting rib plate 6 is provided and a lower strip plate 9 is arranged therein. Then, the upper strip plate 8 and the lower strip plate 9 are connected through an internal connecting member 10, and the final structural assembly is completed.

[0038] During specific processing, it is obtained according to the following steps:

[0039] Process the upper blade 1 and the lower blade 2;

[0040] Respectively, an upper connecting rib plate 4 is provided on the upper blade 1, and a lower connecting rib plate 6 is provided on the lower blade 2 (which can be prepared by integral injection molding or other methods);

[0041] Respectively, an upper strip plate 8 is arranged in the upper mounting strip hole 5 of the upper connecting rib plate 4, and a lower strip plate 9 is arranged in the lower mounting strip hole 7 of the lower connecting rib plate 6;

[0042] An upper connecting sub-rod 11 is provided on the corresponding upper strip plate 8, and a lower connecting sub-rod 12 is provided on the corresponding lower strip plate 9;

[0043] Connect the upper auxiliary spring 17 of the elastic member to the upper connecting sub-rod 11 or connect the lower auxiliary spring 18 to the lower connecting sub-rod 12 (which can be connected by hanging, welding, etc.);

[0044] Then, after the upper blade 1 and the lower blade 2 are abutted, the other side of the elastic member is completed for connection;

[0045] Finally, the upper blade 1 and the lower blade 2 are hot melt welded to obtain a blade segment.

[0046] After obtaining the blade segment of the present application, the blade segments can be assembled in the manner of patents such as CN119593932A, and finally the blade is obtained.

[0047] The above are only embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A power generation fan blade segment, characterized in that: It comprises an upper blade and a lower blade which are arranged in cooperation with each other, wherein a positioning piece is arranged between the upper blade and the lower blade; a plurality of upper connecting ribs are arranged on the inner side of the upper blade, and a plurality of upper mounting strip holes are arranged on the upper connecting ribs; a plurality of lower connecting ribs are arranged on the inner side of the lower blade, and a plurality of lower mounting strip holes are arranged on the lower connecting ribs; an upper strip plate is arranged in the upper mounting strip hole, and a lower strip plate is arranged in the lower mounting strip hole; an inner connecting piece is arranged between the upper strip plate and the lower strip plate.

2. A wind turbine blade segment according to claim 1, characterized in that: The inner connecting member comprises an upper connecting rod and a lower connecting rod, and a plurality of elastic connecting members are arranged between the upper connecting rod and the lower connecting rod; A plurality of upper auxiliary rods are arranged between the upper connecting rod and the upper strip plate arranged oppositely; and a plurality of lower auxiliary rods are arranged between the lower connecting rod and the lower strip plate arranged oppositely.

3. A wind turbine blade segment according to claim 2, characterized in that: The elastic connecting member includes a central plate located in the middle, an upper auxiliary spring is arranged on the side of the central plate facing the upper connecting branch rod, and the upper auxiliary spring is connected to the upper connecting branch rod; a lower auxiliary spring is arranged on the side of the central plate facing the lower connecting branch rod, and the lower auxiliary spring is connected to the lower connecting branch rod.

4. A wind turbine blade segment according to claim 3, characterized in that: The K value of the lower auxiliary spring is the same as that of the upper auxiliary spring, and the K value is 200-400N / m.

5. The wind turbine blade segment according to claim 2, characterized in that: The upper strip plate and the lower strip plate are aluminum plates, the width of the aluminum plates is not less than 25 mm, and the thickness is 1.5-3 mm.

6. A wind turbine blade segment according to claim 2, characterized in that: The upper connecting rib plate includes an upper connecting annular plate connected to the upper blade, a vertical slot is arranged on the side of the upper connecting annular plate facing the lower blade, and the side of the upper auxiliary rod facing the upper blade is connected to the upper strip plate through a vertical connecting rod arranged in the vertical slot.

7. The wind turbine blade segment according to claim 2, characterized in that: The lower connecting rib plate comprises a lower connecting annular plate connected to the lower blades, a transverse slot is arranged on the side of the lower connecting annular plate, and the lower auxiliary rod is connected to the lower strip plate through a transverse connecting rod arranged in the transverse slot.

8. The power generating wind turbine blade segment according to claim 1, characterized in that: The positioning member comprises a plug-in slot disposed on one of the upper blade and the lower blade at one side, and a plug-in convex strip disposed on the other blade and matched with the plug-in slot.

9. A wind turbine blade segment according to claim 8, characterized in that: The plug-in convex strip is abutted in the plug-in groove, and the upper blade and the lower blade are fixedly connected by welding.

10. The power generating wind turbine blade segment according to claim 3, characterized in that: Processed according to the following steps: Processing upper and lower blades; An upper connecting rib is provided on the upper blade, and a lower connecting rib is provided on the lower blade; An upper strip plate is respectively arranged in the upper installation strip hole of the upper connecting rib plate, and a lower strip plate is respectively arranged in the lower installation strip hole of the lower connecting rib plate; An upper connecting rod is arranged on the corresponding upper strip plate, and a lower connecting rod is arranged on the corresponding lower strip plate; Connecting the upper auxiliary spring of the elastic member to the upper connecting rod or connecting the lower auxiliary spring to the lower connecting rod; Then, the upper blade and the lower blade are placed in abutment with each other and the other side of the elastic member is connected; Finally, the upper blade and the lower blade are heat-melted and welded to obtain the blade segment.

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