CN203670111U - Sectional type fan blade - Google Patents

Abstract

The utility model discloses a sectional type fan blade. The sectional type fan blade comprises at least two fan blade sections, wherein every two adjacent fan blade sections are connected through a connecting structure which is installed on the inner surfaces of the two adjacent fan blade sections. According to every two adjacent fan blade sections, a first hole is formed in the surface of one fan blade section, a second hole is formed in the surface of the other fan blade section, the corresponding connecting structure comprises a first connector contained in the first hole, the first connector is connected with one end of a connecting rod, the other end of the connecting rod is connected with a second connector, the connecting rod is located on the inner surfaces of the two adjacent fan blade sections, and the second connector is contained in the second hole. The sectional type fan blade is applied to a window power generator unit, thereby resolving the problem in the prior art that the operation space of a spanner is small when the sectional type fan blade is connected.

Description

Segmented Fan Blades

technical field

The utility model relates to the technical field of wind power generation, in particular to a segmented fan blade.

Background technique

Segmented fan blades are a new technology developed by dividing conventional fan blades (hereinafter referred to as blades) into two or more segments to facilitate the transportation of longer blades in mountainous areas. After the blades are transported to the installation site of the fan, the segmented fan blades must be reconnected. Due to the limitation of the environment of the fan site, the installation requirements of the segmented fan blades are simple and easy to operate. Especially in the harsh environment of the fan site and limited tool conditions, the simpler and easier the installation of the segmented fan blades, the better.

At present, the connection of segmental fan blades usually adopts glue joints, bolt joints or pre-embedded screw sleeve joints. Among them, both the bolted connection and the embedded threaded sleeve connection need to be installed and fixed with nuts. In order to tighten the nut, it is usually necessary to slot the blade so that the wrench can operate in the limited slot space.

For example, the authorized announcement number is: CN20259699U Chinese patent, the name of the utility model creation is: a segmented fan blade, the fan blade is connected by T-shaped bolts. However, since the T-bolts are installed inside the structural layer of the fan blade, the nuts can only be tightened in the limited space of the oblong hole, so the segmented fan blade has the problem of less space for a wrench when tightening the nuts.

Utility model content

The embodiment of the utility model provides a segmented fan blade, in order to solve the problem that the space for the wrench is small when tightening the nut.

In order to achieve the above object, the embodiments of the present utility model adopt the following technical solutions:

A segmented fan blade includes at least two segments of fan blades, two adjacent segments of the blades are connected by a connecting structure, and the connecting structure is installed on the inner surfaces of the two adjacent segments of the blades.

Preferably, one of the two adjacent blades has a first hole on its surface, and the other blade has a second hole on its surface, and the connection structure includes: a first connection accommodated in the first hole The first connecting piece is connected to one end of the connecting rod, and the other end of the connecting rod is connected to the second connecting piece; the connecting rod is located on the inner surface of the two adjacent blades; the second A connector is accommodated in the second hole.

Wherein, the first hole is a round hole, the first connecting piece is a cylinder matched with the round hole, the inside of the cylinder is provided with a radial internal thread, the connecting rod is a double-ended screw, the One end of the double-ended screw is screwed with the radial internal thread; the second connecting piece is a half-cylinder with a semicircular cross-section, and the half-cylinder is provided with a through hole in the radial direction. The other end is screwed with a nut after passing through the through hole.

Preferably, the semi-cylindrical body further includes an extension part, the extension part is accommodated in the second hole, and the cross section of the extension part is circular, and the second hole is a circular hole.

Wherein, an anti-loosening washer is provided between the semi-cylindrical body and the nut.

Preferably, both the first hole and the second hole are round holes, and the first connecting piece and the second connecting piece are cylinders correspondingly matched with the first hole and the second hole respectively , the interior of the cylinder is provided with an axial internal thread, the connecting rod is a strip plate, and the strip plate is provided with two through holes, and a bolt is respectively pierced in the two through holes, The bolt is screwed with the axial internal thread.

Wherein, an anti-loosening gasket is provided between the strip plate and the bolt.

Preferably, a sealing layer is provided on the outer surface of the joint between two adjacent blades.

Wherein, the joint of the two blades is coated with sealant.

In the segmented fan blade provided by the embodiment of the present utility model, since two adjacent blades are connected by a connection structure, and the connection structure is installed on the inner surface of the two adjacent blades, that is, the connection structure is not installed on the blade Therefore, when connecting segmented blades, the installation tool is installed on the inner surface of the blade in the inner cavity of the blade. The operating space in the inner cavity of the blade is very large, which avoids the need When two adjacent segments of blades are connected, the installation tool (such as a wrench) is operated in the opening of the blade thickness layer, thus solving the problem in the prior art that the wrench has less operating space when connecting segmented fan blades.

Description of drawings

Figure 1 is a schematic structural view of a segmented fan blade provided by an embodiment of the present invention;

Fig. 2a is a schematic structural diagram of another segmented fan blade provided by the embodiment of the present invention;

Fig. 2b is a schematic diagram of the connection structure in the segmented fan blade shown in Fig. 2a;

Fig. 3a is a schematic structural diagram of another segmented fan blade provided by the embodiment of the present invention;

Fig. 3b is a schematic diagram of the connection structure in the segmented fan blade shown in Fig. 3a;

Fig. 4 is a schematic structural diagram of another segmented fan blade provided by the embodiment of the present invention;

Fig. 5 is a schematic diagram of a connection structure provided by an embodiment of the present invention.

Detailed ways

The embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings.

The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Disassembled connection, or integral connection; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Referring to Fig. 1, the utility model embodiment provides a segmented fan blade, including at least two fan blades (11 and 12), and two adjacent blades (11 and 12) are connected by a connecting structure 13, and the connecting structure 13 is installed on the inner surfaces of two adjacent sections of blades (11 and 12).

In the segmented fan blade provided by the utility model, since the two adjacent blades (11 and 12) are connected by the connecting structure 13, and the connecting structure 13 is installed inside the two adjacent blades (11 and 12) The surface, i.e. the connecting structure 13 is not installed inside the thickness layer of the blades (11 and 12), therefore, when making a segmented blade (11 and 12) connection, the installation tool is the blade in the inner cavity of the blade (11 and 12) The inner surface of the inner surface of the blade is installed, and the operation space in the inner cavity of the blade is very large, which avoids the installation tool (such as a wrench) in the thickness layer of the blade when connecting two adjacent blades (11 and 12) in the prior art. The situation of operation in the opening solves the problem in the prior art that the wrench has less operating space when connecting the segmented fan blades.

In the segmented fan blades in the prior art, not only a through hole is opened on two adjacent blades, but also an axial through hole is opened in the thickness layer of the blade. The process of opening the through hole is relatively difficult. Large, so there is a problem of time-consuming and high cost in making the segmented fan blades.

In the segmented fan blade provided by the embodiment of the present utility model, specifically, referring to Fig. 1 again, the surface of one section of blade 11 in the adjacent two sections of blades can have a first hole 131, and the surface of the other section of blade 12 can have a hole. There is a second hole 134, and the connecting structure 13 can include: a first connecting piece 132 accommodated in the first hole 131, the first connecting piece 132 is connected with one end of the connecting rod 133, and the other end of the connecting rod 133 can be connected with a second The connecting piece 135 ; the connecting rod 133 is located on the inner surface of two adjacent blades; the second connecting piece 135 is accommodated in the second hole 134 .

Since there is only one hole (131 and 133) on each blade (11 and 12), and each hole (131 and 133) accommodates a connecting piece (132 and 135) correspondingly, then through the The connecting rods 133 on the inner surfaces of the two sections of blades (11 and 12) connect the connectors (132 and 135), so that the connection of the adjacent two sections of blades (11 and 12) can be completed without the need for each section of the blades (11 and 12) Axial holes are provided on the thickness layer, thereby reducing the difficulty of the manufacturing process of the segmented blades (11 and 12), so that the manufacturing time of the segmented fan blades (11 and 12) is reduced and the cost is low.

Preferably, referring to Fig. 2a and Fig. 2b, in the segmented fan blade described above, the first hole 131 may be a circular hole 21, and the first connecting member 132 may be a cylinder 22 matched with the circular hole 21, and the cylinder 22 The inside of the inner thread can be provided with a radial internal thread, and the connecting rod 133 can be a double-ended screw rod 23, and one end of the double-ended screw rod 23 is screwed with the radial internal thread; , The semi-cylindrical body 24 is provided with a through hole 241 in the radial direction, and the other end of the double-ended screw 23 can be screwed with a nut 25 after passing through the through hole 241 .

When connecting segmented fan blades, the specific process is: accommodate the cylinder 22 that matches the circular hole 21 in the circular hole 21, accommodate the semi-cylindrical body 24 in the second hole 134; One end of the screw 23 is screwed with the radial internal thread, the other end of the double-ended screw 23 passes through the through hole 241 , and then the nut 25 is screwed with the other end of the double-ended screw 23 . When carrying out the above operations, when the nut 25 is screwed to the other end of the double-ended screw rod 23, a wrench can be used. Since the double-ended screw rod 23 is located on the surface of the blades (11 and 12) and not on the thickness layer of the blades (11 and 12), Therefore, the operation of the wrench is not limited by space, and has the advantages of simple operation and easy realization.

Referring to Fig. 3a and Fig. 3b, the semi-cylindrical body 24 therein can also include an elongated part 31, and the elongated part 31 is accommodated in the second hole 134, and the cross section of the elongated part is circular, and the second hole 134 can be a circular hole 32. The machining difficulty of the circular hole 32 is less, and the cross-section of the elongated part 31 of the semi-cylindrical body 24 is circular, that is, it can be designed such that the elongated part 31 and the circular hole 32 just match, thereby avoiding that the semi-cylindrical body 24 is in a circular shape. Shake in hole 32.

Referring to Fig. 4, it is also possible to open a first hole 131 and a second hole 134 of the same size on two adjacent blades (that is, the first hole and the second hole are circular holes 21 of the same size), the first The connecting piece 132 is a cylinder 22, and the second connecting piece 135 is a semi-cylindrical body 24, but its extension 31 is a cylinder. The cylindrical body 22 and the semi-cylindrical body 24 can be accommodated alternately, so as to facilitate installation and improve installation efficiency.

In the segmented fan blade described above, referring to FIG. 2 b , an anti-loosening gasket 26 is provided between the semi-cylindrical body 24 and the nut 25, and the anti-loosening gasket 26 can increase the contact area between the semi-cylindrical body 24 and the nut 25, This prevents the connection between the semi-cylindrical body 24 and the nut 25 from loosening, and reduces the probability of stress concentration.

Referring to Fig. 1 and Fig. 5, preferably, in the segmented fan blade mentioned above, the first hole 131 and the second hole 134 can be round holes (not shown in the figure), and the first connecting piece 132 and the second connecting piece The member 135 can be a cylinder 54 correspondingly matched with the first hole 131 and the second hole 134 respectively, and the inside of the cylinder 54 is provided with an axial internal thread, and the connecting rod 133 can be a strip plate 51, on the strip plate 51 Two through holes 511 are provided, and a bolt 52 can be passed through each of the two through holes 511, and the bolt 52 can be screwed with the axial internal thread.

When connecting segmented fan blades, the specific process is as follows: put the two cylinders 54 into the two circular holes respectively, and then respectively insert the bolts 52 into the two through holes 511 of the strip plate 51, and then The bolts 52 are respectively screwed with the axial internal threads on the two cylinders 54, that is, the connection of two adjacent blades (11 and 12) is completed. Wherein, the two cylinders 54 can be the same cylinders with the same size, and correspondingly the size of the two circular holes is also the same, that is to say, only one type of circular hole needs to be opened, and one type of cylinder 54 made. It can meet the demand. This greatly reduces the technical difficulty of opening the round hole or making the cylinder 54, improves the efficiency of making segmented fan blades, and also reduces the cost.

Wherein, an anti-loosening washer 53 may be provided between the strip plate 51 and the bolt 52 . The anti-loosening washer 53 can prevent loosening between the strip plate 51 and the bolt 52 , and can also reduce the probability of stress concentration on the contact surface between the strip plate 51 and the bolt 52 .

In the above-mentioned segmented fan blades, a sealing layer may be provided on the outer surfaces of the joints between two adjacent blades. The sealing layer can seal the connection between two adjacent segments of blades. The sealing layer can be a mixture of hand-pasted glass multi-layer glass fiber cloth and resin on the outer surface of the blade. After the resin is cured, the reinforcing layer is polished, puttyed, and then painted with anti-corrosion paint to prevent rainwater from entering the sealing layer. This in turn corrodes other components on the inner surface of the blade.

In the above-mentioned segmented fan blades, a sealant can be applied to the joints of the two segments of the blades. The sealant can seal the joint of the two sections of blades, thereby preventing rainwater and the like from entering the interior of the blade along the joint of the two sections of blades.

In the description of this specification, specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in an appropriate manner.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (6)

1. a sectional wind turbine blade, comprises at least two sections of fan blades, and two sections of adjacent described blade pass are crossed linkage structure and connected, and it is characterized in that, described linkage structure is arranged on the internal surface of described two sections of adjacent blades;

One section of blade surface in described two sections of adjacent blades has the first hole, another section of blade surface has the second hole, described linkage structure comprises: be contained in the first link in described the first hole, described the first link is connected with one end of connecting rod, and the other end of described connecting rod is connected with the second link; Described connecting rod is positioned at the internal surface of described two sections of adjacent blades; Described the second link is contained in described the second hole;

Described the first hole is circular hole, and described the first link is the cylindrical body coordinating with described circular hole, and this cylindrical inside is provided with radially internal thread, and described connecting rod is double threaded screw, and this double threaded screw one end and described radially internal thread are spirally connected; Described the second link is that cross section is the semicylinder of semicircle, and described semicylinder is provided with through hole in radial direction, and the other end of described double threaded screw is spirally connected with a nut through after described through hole;

Described semicylinder also comprises lengthening part, and described lengthening part is contained in described the second hole, and the cross section of described lengthening part is that circle, described the second hole are circular port.

2. sectional wind turbine blade according to claim 1, is characterized in that, between described semicylinder and described nut, is provided with check washer.

3. sectional wind turbine blade according to claim 1, it is characterized in that, described the first hole and described the second hole are circular hole, described the first link and described the second link are the cylindrical body correspondingly mating with described the first hole and the second hole respectively, described cylindrical inside is provided with axial internal thread, and described connecting rod is strip plate, and described strip plate is provided with two through holes, in described two through holes, wear respectively a bolt, described bolt and described axial internal thread are spirally connected.

4. sectional wind turbine blade according to claim 3, is characterized in that, between described strip plate and described bolt, is provided with check washer.

5. according to the sectional wind turbine blade described in claim 1-4 any one, it is characterized in that, the outer surface of two sections of adjacent described blade joints is provided with sealing layer.

6. according to the sectional wind turbine blade described in claim 1-4 any one, it is characterized in that, the joint of described two sections of blades applies sealer.

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