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CN-224214293-U - Large-scale sectional type wind generating set blade connection structure

CN224214293UCN 224214293 UCN224214293 UCN 224214293UCN-224214293-U

Abstract

The embodiment of the utility model provides a large sectional type wind turbine generator blade connecting structure, which is applied to butt joint between wind turbine generator blade sections and comprises connecting members, wherein bonding parts are respectively constructed at two ends of each connecting member and extend into inner cavities of the wind turbine generator blade sections to expand bonding surfaces, and the bonding parts are bonded with inner cavity walls of the wind turbine generator blade sections. According to the segmented wind turbine generator blade connecting structure, the bonding parts at the two ends of the connecting component extend into the inner cavities of the wind turbine generator blades and are bonded to the inner cavity walls of the wind turbine generator blades, bonding areas are expanded by the bonding parts, bonding strength is improved, and reliable connection between blade sections can be achieved on the premise that the blade weight is not increased much.

Inventors

  • ZHANG YU
  • SONG XIAOFEI
  • YANG XIAOHUI
  • XIE LILAI
  • HU CONGLIANG
  • CHEN HAIXIA

Assignees

  • 北京鉴衡认证中心有限公司

Dates

Publication Date
20260508
Application Date
20250708

Claims (8)

  1. 1. The large sectional type wind turbine blade connecting structure is applied to butt joint between wind turbine blade segments (2) and is characterized by comprising connecting members (1), wherein bonding parts (11) are formed at two ends of each connecting member (1), the bonding parts (11) extend into inner cavities of the wind turbine blade segments (2) to expand bonding surfaces, and the bonding parts (11) are bonded with inner cavity walls of the wind turbine blade segments (2); The connecting member (1) comprises a first connecting piece (12) and a second connecting piece (13), wherein a reinforced connecting structure is arranged on the first connecting piece (12) and the second connecting piece (13), the first connecting piece (12) and the second connecting piece (13) are in butt joint at one end through the reinforced connecting structure, and the other ends of the first connecting piece (12) and the second connecting piece (13) extend into the inner cavity of the wind turbine blade segment (2) to form the bonding part (11).
  2. 2. A large-scale sectional wind turbine blade connection structure according to claim 1, wherein the reinforcing connection structure comprises an insertion portion (14) and a groove-shaped portion (15), the insertion portion (14) is matched with the groove-shaped portion (15), the insertion portion (14) and the groove-shaped portion (15) are respectively configured at the end parts of the butt joint ends of the first connecting piece (12) and the second connecting piece (13), and the insertion portion (14) is inserted into the groove-shaped portion (15) when the first connecting piece (12) and the second connecting piece (13) are in butt joint.
  3. 3. The blade connecting structure of the large-sized sectional type wind generating set according to claim 2, wherein the reinforcing connecting structure further comprises a plurality of fixing pieces (16), a plurality of first connecting holes (17) and a plurality of second connecting holes (18), the first connecting holes (17) and the second connecting holes (18) are respectively formed in the inserting portion (14) and the groove-shaped portion (15), the first connecting holes (17) and the second connecting holes (18) are in one-to-one correspondence when the inserting portion (14) is inserted into the groove-shaped portion (15) to form fixing holes matched with the fixing pieces (16), and the fixing pieces (16) are inserted into the fixing holes to fix the first connecting pieces (12) and the second connecting pieces (13).
  4. 4. A large segmented wind power plant blade connection according to claim 3, wherein the fixing members (16) are bolts or rivets.
  5. 5. A large segment wind turbine blade attachment according to any of claims 2-4, wherein the outer wall of the insert part (14) is provided with an adhesive coating, which adhesive coating adheres the outer wall of the insert part (14) to the inner wall of the slot part (15) when the insert part (14) is inserted into the slot part (15).
  6. 6. A large segmented wind power plant blade connection according to claim 1, wherein the first and second connection members (12, 13) are configured to match the shape of the inner cavity of the wind power plant blade segment (2) such that the adhesive parts (11) on the first and second connection members (12, 13) are in abutment with the wall of the inner cavity of the wind power plant blade segment (2).
  7. 7. The large-sized sectional type wind generating set blade connecting structure according to claim 1, further comprising a pneumatic housing, wherein the pneumatic housing covers the connecting member (1), and both ends of the pneumatic housing are respectively abutted against the wind generating set blade segments (2).
  8. 8. The large segmented wind generating set blade connection structure according to claim 7, wherein the aerodynamic shell comprises a windward aerodynamic shell (3) and a leeward aerodynamic shell (4), the windward aerodynamic shell (3) and the leeward aerodynamic shell (4) are covered to form a surrounding structure to cover the connection member (1), and the windward aerodynamic shell (3) and the leeward aerodynamic shell (4) are fixedly connected to the connection member (1).

Description

Large-scale sectional type wind generating set blade connection structure Technical Field The utility model belongs to the technical field of wind driven generator blades, and particularly relates to a large sectional type wind driven generator set blade connecting structure. Background The large-scale wind turbine blade is the current mainstream, the length of the current land wind turbine blade reaches 130 meters, the manufacturing difficulty of the wind turbine blade is increased year by year, and the transportation difficulty is increased when the length of the wind turbine blade is increased. Segmented blades are considered one of the mainstream solutions to the pain points of this industry. The current segmented blade connection methods mainly comprise three types: (1) And (5) bonding and connecting. The bonding connection means that at least two sections of the segmented blade are connected by means of structural adhesive and other materials, the main connection parts are main beams, web plates and other areas, and the bonding area is enlarged as much as possible by designing the structure of the bonding parts so as to enhance the strength of the whole connection. (2) And (5) connecting bolts. The scheme of carrying out mechanical connection through modes such as T-shaped bolts, embedded bolts, flange-bolt connection and the like mainly comprises the steps of designing a mechanical connection structure, connecting at least two sections of the blade by means of pretightening force of the bolts, and has reliable mechanical properties but is easy to introduce excessive extra weight. (3) The tube and the rod are matched. At least two sections are connected through structures such as steel bars or pipe bars, and are fixed through methods such as pouring resin or welding, and the on-site pouring process is complex and the curing effect is poor. As disclosed in patent No. CN114562410a, a sectional wind power blade, a manufacturing method and an assembling method thereof, the scheme increases the whole bonding area by providing a chamfer between blade sections, and ensures the matching between section bonding surfaces by laying a release medium layer on the chamfer in the process of manufacturing the blade. But the scheme is used for hundred-meter large-size segmented blades, and the connection strength is still to be inspected. Disclosure of utility model In view of the foregoing problems of the prior art, an object of an embodiment of the present utility model is to provide a blade connection structure of a large-sized segmented wind turbine generator set. The technical scheme adopted by the embodiment of the utility model is that the large sectional type wind turbine generator blade connecting structure is applied to butt joint between wind turbine generator blade sections and comprises connecting members, wherein bonding parts are respectively constructed at two ends of each connecting member and extend into inner cavities of the wind turbine generator blade sections to expand bonding surfaces, and the bonding parts are bonded with inner cavity walls of the wind turbine generator blade sections; the connecting component comprises a first connecting piece and a second connecting piece, wherein a reinforcing connecting structure is arranged on the first connecting piece and the second connecting piece, the first connecting piece and the second connecting piece are in butt joint at one end through the reinforcing connecting structure, and the other ends of the first connecting piece and the second connecting piece extend into the inner cavity of the blade section of the wind power generator unit to form an adhesive part. Further, the reinforcing connection structure includes an insertion portion and a groove-like portion, the insertion portion being fitted with the groove-like portion, the insertion portion and the groove-like portion being respectively configured at end portions of the abutting ends of the first connecting piece and the second connecting piece, the insertion portion being inserted into the groove-like portion when the first connecting piece and the second connecting piece are abutted. Further, the reinforcing connection structure further comprises a plurality of fixing pieces, a plurality of first connection holes and a plurality of second connection holes, wherein the first connection holes and the second connection holes are respectively formed in the insertion portion and the groove-shaped portion, the first connection holes and the second connection holes are in one-to-one correspondence to form fixing holes matched with the fixing pieces when the insertion portion is inserted into the groove-shaped portion, and the fixing pieces are inserted into the fixing holes to fix the first connection pieces and the second connection pieces. Further, the fixing piece is a bolt or a rivet. Further, an adhesive coating is arranged on the outer wall of the insertion part, and the adhesive coating b