CN214741862U

CN214741862U - Sectional blade connecting device

Info

Publication number: CN214741862U
Application number: CN202120971667.1U
Authority: CN
Inventors: 王国军; 路绪恒
Original assignee: Shanghai Electric Wind Power Group Co Ltd
Current assignee: Shanghai Electric Wind Power Group Co Ltd
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2021-11-16
Anticipated expiration: 2031-05-08

Abstract

The utility model discloses a segmentation blade connecting device, include: the two connecting plates are arranged oppositely and matched with the wing profiles of the corresponding blade sections; and the cover plate is arranged on the connecting plate and is used for connecting the two connecting plates so as to connect the corresponding blade sections. The utility model discloses can make the connection of segmentation blade more reliable, the segmentation position additional mass is light to be convenient for installation and later maintenance.

Description

Sectional blade connecting device

Technical Field

The utility model relates to a wind-powered electricity generation blade technical field especially relates to a segmentation blade connecting device.

Background

As wind blades grow longer and longer, the cost and difficulty of their transportation increases significantly. In order to reduce the difficulty of transportation and greatly save the transportation cost, the sectional blade is the subsequent main development trend. The segmented blade has been developed for a long time at home and abroad, but the weight and the cost of the blade are greatly increased due to the obvious weight increase of the segmented blade at the segmented position, so that the segmented blade has poor economy.

The related art provides a connection mode of a sectional blade, which comprises the following steps: (1) matching the blade sections at two sides in the main beam area, and then bonding in the connection area; (2) the two blade sections are connected through bolts, bolts are installed on the embedded bolt sleeves on one sides of the blade sections, and then nuts are installed on the other sides of the blade sections through holes and are fastened; (3) the mating is done at the connection site by a rod and a tube.

However, the above solutions have the following problems: (1) the existing bonding scheme has insufficient bonding strength and is easy to cause connection failure; (2) the weight increase of the bolt connection mode at the connection position is large; (3) the pipe pultrusion piece is difficult to manufacture and process, the pipe and the bar are difficult to be tightly arranged, the drawing force of the structure is influenced, and the circular pipe is also difficult to be pre-buried and produced in the main beam.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. To this end, an object of the present invention is to provide a segmented blade connection device, so that the connection of the segmented blades is more reliable, the additional mass of the segmented position is light, and the installation and the later maintenance are convenient.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

a segmented blade attachment comprising: the two connecting plates 100 are arranged on the corresponding blade sections, and each connecting plate 100 is arranged oppositely and matched with the wing profile of the corresponding blade section; a cover plate 200 disposed on the connecting plate 100, the cover plate 200 being used to connect two of the connecting plates 100 to connect the corresponding blade segments.

Optionally, first ends of two connecting plates 100 respectively overlap inside the shell of the corresponding blade segment, and second ends of two connecting plates 100 are oppositely arranged and contact with each other.

Optionally, the cover plate 200 includes: and the upper cover plate 210 is disposed on the outer surfaces of the second ends of the two connecting plates 100, the lower cover plate 220 is disposed on the outer surfaces of the second ends of the two connecting plates 100, and the upper cover plate 210 and the lower cover plate 220 are oppositely disposed.

Optionally, each connecting plate 100 is provided with a plurality of first through holes, and the plurality of first through holes are distributed in a plurality of rows and a plurality of columns; a plurality of second through holes are formed in the cover plate 200, are distributed in a plurality of rows and a plurality of columns, and are arranged in one-to-one correspondence with the first through holes; and each connecting piece correspondingly penetrates through the first through hole and the second through hole so as to connect the two connecting plates 100.

Optionally, each of the second through holes is a counter-sunk hole, and each of the connecting members is a rivet or a bolt.

Optionally, the pitch of the first through holes on each connecting plate 100 is greater than four times of the aperture of the first through holes, and the pitch of the first through holes is greater than five times of the aperture of the first through holes.

Optionally, after the cover plate 200 is covered on the connecting plate 100, the surface of the cover plate 200 is flush with the shell of the blade segment at the connecting position.

Optionally, the cover plate 200 includes: a first upper sub-cover 201 disposed on the outer surface of the top end of the second end of the connection plate 100; a second upper sub-cap 202 disposed on an inner surface of a top end of the second end of the connection plate 100; a first lower sub-cap plate disposed on an outer surface of a bottom end of the second end of the connection plate 100; and a second lower sub-cover plate disposed on an inner surface of a bottom end of the second end of the connecting plate 100, wherein the first upper sub-cover plate 201 is disposed opposite to the second upper sub-cover plate 202, and the first lower sub-cover plate is disposed opposite to the second lower sub-cover plate.

Optionally, the web of the blade segment is broken at the connection point and a C-shaped opening is opened at the broken point.

Optionally, each of the connecting plate 100 and the cover plate 200 is made of a carbon fiber material.

The utility model discloses one of following advantage has at least:

the utility model provides a pair of segmentation blade connecting device will set up two connecting plates on the blade section through the apron and connect, can effectively improve the joint strength of blade section.

The utility model discloses an use carbon fiber connecting plate, carbon fiber apron and rivet to carry out mechanical connection, have the light advantage of additional mass to have higher unit security, except can effectively improving the joint strength who connects the position, still can improve its bearing capacity, can carry out the single face operation through the rivet in addition, very big improvement installation effectiveness, and provide certain facility to the maintenance in later stage.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic view of a connection of segmented blades according to an embodiment of the present invention;

fig. 2 is a schematic view of a sectional blade according to an embodiment of the present invention;

fig. 3 is a schematic view illustrating a connection between a connection plate and a cover plate according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating a specific bonding of the segmented blade according to an embodiment of the present invention;

fig. 5 is a schematic view of a cover plate structure according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The segmented blade attachment of the present embodiment is described below with reference to the accompanying drawings.

Example one

As shown in fig. 1, the segmented blade connecting device of the present embodiment includes two connecting plates 100 and a shroud 200. Each connecting plate 100 is arranged on the corresponding blade segment 300, and the two connecting plates 100 are oppositely arranged and matched with the airfoil profile of the corresponding blade segment 300; the cover plate 200 is provided on the connection plate 100, and the cover plate 200 is used to connect two connection plates 100 to connect the corresponding blade segments 300.

The connecting plates 100 on two sides of the sectional blade of the embodiment are connected through the cover plate 200, and the connecting plates 100 and the cover plate 200 are both made of carbon fiber materials, so that the connecting parts have higher connecting strength. In addition, the thickness of the cover plate 200 is the same as the thickness of the shell 500 of the blade section 300 at the connection position (i.e. the thickness of the layer of the shell), i.e. after the cover plate 200 is covered on the connection plate 100, the surface of the cover plate 200 is flush with the shell of the blade section 300 at the connection position, so that the appearance of the assembled blade is smoother.

As shown in fig. 2, at the segmented position of the blade, the blade segments 300 on both sides are embedded with the connection plates 100 (the first ends of the two connection plates 100 are respectively overlapped inside the shells of the corresponding blade segments 300, and the second ends of the two connection plates 100 are oppositely arranged and are in contact with each other). The width of each web 100 decreases from the root of the blade to the tip of the blade. Specifically, the widths of the spar 400 and the web 100 within the blade segment 300 are varied slowly and uniformly to avoid stress concentrations experienced by the web 100 and to provide more uniform load transfer.

With continued reference to fig. 1, the cover plate 200 includes an upper cover plate 210 and a lower cover plate 220, the upper cover plate 210 is disposed on the outer surface of the second ends of the two connecting plates 100, the lower cover plate 220 is disposed on the outer surface of the second ends of the two connecting plates 100, and the upper cover plate 210 and the lower cover plate 220 are disposed opposite to each other.

The inner surface of the shell 500 at the connecting part and the outer surface of the connecting plate 100 are better in shape following; and the thickness of the shell 500 at the connecting part is the same as that of the upper cover plate 210 and the lower cover plate 220, so that the appearance of the assembled blade is smoother.

As shown in fig. 1 and fig. 3, each connecting plate 100 is provided with a plurality of first through holes 600, and the plurality of first through holes 600 are distributed in a plurality of rows and a plurality of columns; the cover plate 200 is provided with a plurality of second through holes 700, the plurality of second through holes 700 are distributed in a plurality of rows and a plurality of columns, and the second through holes 700 are arranged in one-to-one correspondence with the first through holes 600; and a plurality of connecting members, each of which correspondingly penetrates through the first through hole 600 and the second through hole 700 to connect the two connecting plates 100.

Specifically, the first through holes 600 on the connecting plate 100 may adopt three rows and multiple columns but are not limited to three rows and multiple columns, and the first through holes 600 and the second through holes 700 may be drilled in advance in a workshop for direct assembly on site. And, the row pitch of the first through holes on each connecting plate 100 is greater than four times of the aperture of the first through holes, and the column pitch of the first through holes is greater than five times of the aperture of the first through holes, so as to ensure that the connecting plate 100 has sufficient tensile strength and shear strength.

In a specific installation, the connection plates 100 on both sides may be butted, and the position of the cap plate 200 may be positioned by aligning the connection holes (the first through hole 600 and the second through hole 700). Each of the second through holes 700 is a counter-sunk hole, and each of the connectors is a rivet or a bolt. For example: the rivet is a countersunk self-plugging rivet, and the countersunk self-plugging rivet penetrates through the corresponding second through hole 700 and the first through hole 600 in sequence to fasten the connecting plate 100 together. The countersunk self-plugging rivet can enable the surface of the connecting area to be smooth and reduce the influence on the aerodynamic performance of the blade. In addition, the countersunk self-plugging rivet can be operated on a single side, so that the installation and the maintenance are greatly facilitated, and the field assembly efficiency is improved. In addition, in the present embodiment, the connecting member may be connected by a high-lock bolt among the bolts to further improve the shear strength.

In this embodiment, as shown in fig. 4, the web 900 of the blade segment 300 is broken at the connection point, and a C-shaped opening 901 is opened at the broken point. The C-shaped opening 901 is a concave opening, and the C-shaped opening 901 recessed towards the blade tip is arranged opposite to the C-shaped opening 901 recessed towards the blade root. In this embodiment, the web 900 and the shell 500 are bonded by the bonding glue 800, the blade can improve the bearing capacity of the blade by bonding the web 900, and the C-shaped opening 901 at the break of the web 900 can avoid the concentration of stress at the connection part.

Example two

As shown in fig. 5, based on the first embodiment, the difference from the first embodiment is that the cover plate 200 provided in this embodiment specifically includes a first upper sub-cover plate 201 disposed on the outer surface of the top end of the second end of the connecting plate 100; and a second upper sub-cap 202 disposed on an inner surface of a top end of the second end of the connection plate 100, the second upper sub-cap 202 being disposed opposite to the first upper sub-cap 201. The cap plate 200 further includes a first lower sub-cap plate (not shown) disposed on the outer surface of the bottom end of the second end of the connection plate 100; and a second lower sub-cap (not shown) disposed on the inner surface of the bottom end of the second end of the connection plate 100, the second lower sub-cap being disposed opposite to the first lower sub-cap.

With continued reference to fig. 5, the cover plate 200 may adopt a double-shear connection, that is, the connection plate 100 at the top end is simultaneously fixed by the first upper sub-cover plate 201 and the second upper sub-cover plate 202, and the connection plate 100 at the bottom end is simultaneously fixed by the first lower sub-cover plate and the second lower sub-cover plate. For example, a rivet may penetrate the first upper sub-cap plate 201, the top connection plate 100, and the second upper sub-cap plate 202 to fix the top connection plate 100. Similarly, a rivet may penetrate the first lower sub-cap plate, the connection plate 100 of the bottom end, and the second lower sub-cap plate to fix the connection plate 100 of the bottom end. The first upper sub-cover plate 201 and the first lower sub-cover plate are countersunk holes, and the second upper sub-cover plate 202 and the second lower sub-cover plate are common through holes. Preferably, the rivets are countersunk blind rivets to smooth the surface of the attachment area and reduce the impact on the aerodynamic performance of the blade. Moreover, the countersunk self-plugging rivet can be operated on a single side, so that the installation and the maintenance are greatly facilitated, and the field assembly efficiency is improved. In addition, in the present embodiment, the connection may be performed by using a high-lock bolt among bolts to further improve the shear strength.

Optionally, the thickness of the first upper sub-cover plate 201 is the same as the thickness of the shell 500 at the top end of the blade segment 300 at the connecting position, and the thickness of the first lower sub-cover plate is the same as the thickness of the shell 500 at the bottom end of the blade segment 300 at the connecting position, so that the assembled blade has a smoother appearance.

In this embodiment, the second upper sub-shroud 202 and the second lower sub-shroud fasten the connecting plate 100 at the top end and the connecting plate 100 at the bottom end respectively, so that the connection strength of the blade segment 300 at the connection part can be effectively improved.

To sum up, the utility model provides a pair of segmentation blade connecting device will set up two connecting plates on the blade section through the apron and connect, can effectively improve the joint strength of blade section.

The utility model discloses an use carbon fiber connecting plate, carbon fiber apron and rivet to carry out mechanical connection, have the light advantage of additional mass to have higher unit security, except can improving the joint strength who connects the position, still can improve its bearing capacity, can carry out the single face operation through the rivet in addition, very big improvement installation effectiveness, and provide certain facility to the maintenance in later stage.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims

1. A segmented blade connection apparatus, comprising:

the connecting plates (100) are arranged on the corresponding blade sections, and the two connecting plates (100) are arranged oppositely and matched with the wing profiles of the corresponding blade sections;

a cover plate (200) disposed on the connection plate (100), the cover plate (200) being used to connect two of the connection plates (100) to connect the corresponding blade segments.

2. The segmented blade connection arrangement as claimed in claim 1, wherein first ends of two of said connection plates (100) respectively overlap inside the shell of the corresponding blade segment, and second ends of two of said connection plates (100) are oppositely arranged and in contact with each other.

3. The segmented vane attachment arrangement of claim 2, wherein the cover plate (200) comprises: the upper cover plate (210) is arranged on the outer surface of the second ends of the two connecting plates (100), the lower cover plate (220) is arranged on the outer surface of the second ends of the two connecting plates (100), and the upper cover plate (210) and the lower cover plate (220) are oppositely arranged.

4. The connecting device for sectional blades according to claim 3, wherein each connecting plate (100) is provided with a plurality of first through holes, and the plurality of first through holes are distributed in a plurality of rows and a plurality of columns; the cover plate (200) is provided with a plurality of second through holes which are distributed in a plurality of rows and a plurality of columns, and the second through holes are in one-to-one correspondence with the first through holes; and each connecting piece correspondingly penetrates through the first through hole and the second through hole so as to connect the two connecting plates (100).

5. The segmented vane attachment of claim 4 wherein each of said second through holes is a counter-sunk hole and each of said attachment members is a rivet or bolt.

6. The segmented blade attachment arrangement of claim 5 wherein the pitch of the first through holes on each of said webs (100) is greater than four times the diameter of said first through holes and the pitch of said first through holes is greater than five times the diameter of said first through holes.

7. The segmented blade connection arrangement as claimed in claim 1, wherein the cover plate (200) is covered on the connection plate (100) with a surface of the cover plate (200) flush with the shell of the blade segment at the connection site.

8. The segmented vane attachment arrangement of claim 2, wherein the cover plate (200) comprises:

a first upper sub-cover plate (201) arranged on the top outer surface of the second end of the connecting plate (100);

a second upper sub-cap plate (202) provided on the top inner surface of the second end of the connection plate (100);

the first lower sub-cover plate is arranged on the outer surface of the bottom end of the second end of the connecting plate (100);

a second lower sub-cap plate disposed on an inner surface of a bottom end of a second end of the connection plate (100);

the first upper sub cover plate (201) and the second upper sub cover plate (202) are arranged oppositely; the first lower sub-cover plate and the second lower sub-cover plate are arranged oppositely.

9. The segmented blade connection of claim 1 wherein the web of the blade segment is broken at the connection point and a C-shaped opening is provided at the break.

10. The segmented blade attachment arrangement of claim 1, wherein each of the web (100) and the cap plate (200) is made of a carbon fiber material.