| 摘要 |
A method of making a wind turbine blade 10 using a two-stage join up process is described. The blade includes a longitudinal reinforcing structure 34, such as a spar structure or shear web, connected between first and second blade shells 22, 24. During the first stage of the join-up, the reinforcing structure is bonded to an inner surface of the first shell by means of adhesive 60 provided between the reinforcing structure and the first shell. The second shell is positioned on top of the first shell during the first stage in order to exert a compressive load on the reinforcing structure and squeeze the adhesive between the reinforcing structure and the first shell. According to the invention, a shim 70 made from compressible material is positioned between the reinforcing structure and the second shell during the first stage of the join-up. The shim compresses together with the adhesive. Subsequent gradual expansion of the shim results in a gradual further compression of the adhesive between the reinforcing structure and the first shell. Preferably, the shim has a compressive modulus substantially matched to that of the uncured adhesive; the shim may be made from foam, particularly neoprene, or rubber material. During the second stage of the join-up; preferably, the shim is removed and the reinforcing structure is bonded to an inner surface of the second shell and the first and second shells are joined together. |
