| 摘要 |
1,197,647. Covering cores by winding. ROLLS-ROYCE Ltd. 4 Feb., 1969 [8 Feb., 1968], No. 6219/68. Heading B8G. [Also in Divisions B3 and F1] Compressor blades for a gas turbine engine are produced by winding coated fibres about a former 25 having the shape of the space between two adjacent blades, the fibres extending in the directions indicated at 26 and 27. The former 25 is split at 28, 29 into three pieces, the centre one of which is wedge shaped. The former 25 is first coated with a parting agent and then the fibres are wound thereabout by rotating the former 25 about axis A-A. In the case of resin coated fibres the assembly is then impregnated with further resin and cured before removing the former 25. One vehicle wall of the resultant winding 30 becomes the concave flank of one blade; and the other vertical wall becomes the convex flank of the next adjacent blade, a complete annular blade array being formed by assembling together a series of members 30. The windings extending in the direction 27 may be used as inner and outer shrouds or one of these portions may be cut off. The fibres may be carbon or graphite in a resin matrix, carbon in a nickel matrix, or boron or silica in an aluminium matrix. |
