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CN-122014670-A - Large wind tunnel blade and preparation method thereof

CN122014670ACN 122014670 ACN122014670 ACN 122014670ACN-122014670-A

Abstract

The invention discloses a large wind tunnel blade, which is characterized in that a pressure surface shell and a pressure surface girder are co-solidified into a whole, a plurality of first rib plates are bonded on one side of the pressure surface girder, a suction surface shell and a suction surface girder are co-solidified into a whole, a plurality of second rib plates are bonded on one side of the suction surface girder, the pressure surface girder and the suction surface girder are bonded to form a whole girder, one end of a metal blade root is tightly held at one end of the pressure surface girder and the suction surface girder and is matched and bonded with the pressure surface girder and the suction surface girder, the suction surface shell and the pressure surface shell are bonded to form a blade body, and the first rib plates and the second rib plates are distributed on two sides of the whole girder and are bonded between the pressure surface shell and the suction surface shell. Also discloses a preparation method of the large wind tunnel blade. The large wind tunnel blade and the preparation method thereof have the advantages of convenient connection, low requirement on a die, low manufacturing cost and the like, and are beneficial to ensuring the connection strength.

Inventors

  • YANG JINSHUI
  • XIE SHAOXIANG
  • XING SULI
  • TAO LEI
  • YIN CHANGPING
  • DUAN KE
  • GUO XIAOJUN
  • CHEN DINGDING

Assignees

  • 中国人民解放军国防科技大学
  • 株洲时代新材料科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260211

Claims (10)

  1. 1. The large wind tunnel blade is characterized by comprising a pressure surface main beam (1), a suction surface main beam (2), a pressure surface shell (3), a suction surface shell (4) and a metal blade root (5), wherein the pressure surface shell (3) and the pressure surface main beam (1) are jointly solidified into a whole, one side of the pressure surface main beam (1) is adhered with a plurality of first rib plates (6) which are arranged at intervals along the extending direction of the pressure surface main beam (1) by the pressure surface shell (3), the suction surface shell (4) and the suction surface main beam (2) are jointly solidified into a whole, one side of the suction surface shell (4) on the suction surface main beam (2) is adhered with a plurality of second rib plates (7) which are arranged at intervals along the extending direction of the suction surface main beam (2), one end of the metal blade root (5) is tightly held at one end of the pressure surface main beam (1) and one end of the suction surface main beam (2) and is adhered with the pressure surface main beam (1) in an adapting mode, the suction surface main beam (2) and the suction surface main beam (4) and the suction surface main beam (2) are adhered with the first rib plates and the second rib plates (7) are distributed between the suction surface main beam (3) and the first rib plates (4) and the second rib plates.
  2. 2. A large wind tunnel blade according to claim 1, characterized in that the left side wall of the pressure side girder (1) is lower than the right side wall and the left side wall of the suction side girder (2) is higher than the right side wall.
  3. 3. A large wind tunnel blade according to claim 2, wherein the first rib (6) is glued to the outside of the right side wall of the pressure side girder (1) and the second rib (7) is glued to the outside of the left side wall of the suction side girder (2).
  4. 4. The large wind tunnel blade according to claim 2, wherein an upper protruding plate (21) is arranged at the upper edge of the left side wall of the suction surface main beam (2), the upper protruding plate (21) is bonded with the outer surface of the left side wall of the pressure surface main beam (1), a lower protruding plate (11) is arranged at the lower edge of the right side wall of the pressure surface main beam (1), and the lower protruding plate (11) is bonded with the outer surface of the right side wall of the suction surface main beam (2).
  5. 5. A large wind tunnel blade according to claim 1, wherein one end of the metal blade root (5) is provided with a conical connector (51) with a large outer end and a small inner end, one ends of the pressure surface main beam (1) and the suction surface main beam (2) are respectively provided with a first adapting surface (12) and a second adapting surface (22) which are matched with the conical connector (51), and the first adapting surface (12) and the second adapting surface (22) are tightly held on the outer peripheral surface of the conical connector (51) and are adhered with the conical connector (51).
  6. 6. A large wind tunnel blade according to claim 5, wherein the end of the metal blade root (5) facing the conical connector (51) is provided with an aligning annular surface (52), and the end surfaces of the pressure surface main beam (1) and the suction surface main beam (2) are propped against the aligning annular surface (52).
  7. 7. A large wind tunnel blade according to claim 6, wherein the pressure side girder (1) and the suction side girder (2) are bonded to the alignment ring surface (52).
  8. 8. A large wind tunnel blade according to any one of claims 1 to 7, wherein the pressure side shell (3) and the pressure side main beam (1), and the suction side shell (4) and the suction side main beam (2) are pre-cured by a mould after fibre prepreg layer is laid, and then co-cured by heating to a temperature of T1, and then co-cured by heating to a temperature of T2, wherein T1< T2.
  9. 9. A large wind tunnel blade according to any of claims 1-7, characterised in that the pressure side girders (1) and suction side girders (2), pressure side shells (3) and suction side shells (4), pressure side girders (1) and first rib plates (6), and suction side girders (2) and second rib plates (7) are all glued by means of a structural glue, that the pressure side girders (1) and suction side girders (2) are both glued to the metal blade root (5) by means of a structural glue, and that the first rib plates (6) and second rib plates (7) are glued between the pressure side shells (3) and suction side shells (4) by means of a structural glue.
  10. 10. A method of manufacturing a large wind tunnel blade according to any one of claims 1 to 9, comprising the steps of: S1, firstly, paving a fiber prepreg layer through a die, heating to the temperature T1, and respectively pre-curing to form a pressure surface main beam (1), a suction surface main beam (2), a pressure surface shell (3) and a suction surface shell (4), then, splicing the pressure surface shell (3) and the pressure surface main beam (1), then, jointly heating to the temperature T2 to be co-cured into a whole, splicing the suction surface shell (4) and the suction surface main beam (2), and jointly heating to the temperature T2 to be co-cured into a whole, wherein T1 is less than T2; S2, removing moulds of the pressure surface main beam (1) and the suction surface main beam (2), bonding a plurality of first rib plates (6) which are arranged at intervals along the extending direction of the pressure surface main beam (1) on one side of the pressure surface main beam (1) on the pressure surface shell (3), and bonding a plurality of second rib plates (7) which are arranged at intervals along the extending direction of the suction surface main beam (2) on one side of the suction surface main beam (2) on the suction surface shell (4); S3, bonding the pressure surface main beam (1) and the suction surface main beam (2) to form an integral main beam, tightly holding one end of the metal blade root (5) and bonding the metal blade root (5) to one ends of the pressure surface main beam (1) and the suction surface main beam (2), and bonding the suction surface shell (4) and the pressure surface shell (3) to form a blade body, wherein the first rib plate (6) and the second rib plate (7) are distributed on two sides of the integral main beam and bonded between the pressure surface shell (3) and the suction surface shell (4); s4, demolding the pressure surface shell (3) and the suction surface shell (4) respectively.

Description

Large wind tunnel blade and preparation method thereof Technical Field The invention relates to the technical field of wind tunnel equipment, in particular to a large wind tunnel blade and a preparation method thereof. Background The Chinese patent document with the prior application number 202411803561.5 discloses a full-size wind tunnel high-load blade, which relates to the technical field of wind tunnel equipment and comprises a metal blade root, a hollow main beam and a blade body, wherein one end of the metal blade root is provided with a main beam connecting section, the side wall of the main beam connecting section is a first conical side wall surface, the large opening end of the first conical side wall surface is closer to the end part of the main beam connecting section of the metal blade root than the small opening end of the first conical side wall surface, the hollow main beam is formed by wrapping a carbon fiber cloth layer, one end of the hollow main beam is provided with the blade root connecting section, the blade root connecting section is fixedly sleeved on the main beam connecting section, the inner side wall of the blade root connecting section is a second conical side wall surface, the second conical side wall surface is attached to the first conical side wall surface, the blade body is made of carbon fiber, and the blade body is fixedly arranged on the hollow main beam. The hollow main beam of the full-size wind tunnel high-load blade is generally manufactured in an integral mode, on one hand, the hollow main beam is wound and wrapped on a metal blade root through a carbon fiber cloth layer to achieve connection, connection is inconvenient, connection strength is difficult to ensure, on the other hand, the hollow main beam is a hollow irregular cylinder, and the requirement of integral forming on a die is high and manufacturing cost is high. Disclosure of Invention The invention aims to solve the technical problem of overcoming the defects of the prior art and providing the large wind tunnel blade which is convenient to connect, favorable for ensuring the connection strength, low in requirement on a die and low in manufacturing cost and the preparation method thereof. In order to solve the technical problems, the invention adopts the following technical scheme: The utility model provides a large-scale wind tunnel blade, includes pressure face girder, suction face girder, pressure face casing, suction face casing and metal blade root, pressure face casing and pressure face girder solidify jointly altogether, pressure face casing bonds a plurality of first floor along pressure face girder extending direction interval arrangement in one side of pressure face girder, suction face casing and suction face girder solidify jointly altogether, suction face casing bonds a plurality of second floor along suction face girder extending direction interval arrangement in one side of suction face girder, pressure face girder and suction face girder bond formation whole girder, the one end of metal blade root is held tightly in the one end of pressure face girder and suction face girder to with pressure face girder and suction face girder adaptation bond, suction face casing and pressure face casing bond formation blade body, first floor and second floor distribute in the both sides of whole girder, and bond between pressure face casing and suction face casing. As a further improvement of the above technical scheme: The left side wall of the pressure surface girder is lower than the right side wall, and the left side wall of the suction surface girder is higher than the right side wall. The first rib plate is adhered to the outer side of the right side wall of the pressure surface main beam, and the second rib plate is adhered to the outer side of the left side wall of the suction surface main beam. The upper edge of the left side wall of the suction surface girder is provided with an upper convex plate, the upper convex plate is bonded with the outer surface of the left side wall of the pressure surface girder, the lower edge of the right side wall of the pressure surface girder is provided with a lower convex plate, and the lower convex plate is bonded with the outer surface of the right side wall of the suction surface girder. The one end of metal blade root is equipped with the big inner little taper connection head of outer end, the one end of pressure face girder and suction face girder is equipped with respectively with the first adaptation face and the second adaptation face of taper connection head adaptation, first adaptation face and second adaptation face are held tightly on the outer peripheral face of taper connection head to bond with the taper connection head. The metal blade root has the counterpoint anchor ring towards the one end of cone-shaped connector, the terminal surface of pressure face girder and suction face girder all supports on the counterpoint anchor ring. And the pressu