Euro-Megalopolis or Theme Park Europe?

Abstract

903,176. Turbine and compressor-bladed rotors. ROLLS-ROYCE Ltd. Jan. 10, 1961 [Jan. 18, 1960], No. 1761/60. Class 110 (3). A method of assembling a rotary bladed member comprises introducing the roots 15 of a number of blades 16, one at a time, into a localized widened portion 14 of a groove 11, moving each blade root 15 within the groove 11 into a position in which shoulders 18, 19 on the roots 15 are respectively engaged behind shoulders 12, 13 bounding the groove 11. Prior to inserting the final blade, a spring-loaded plate 20 is introduced into the widened portion or slot 14 and is pressed towards the disc axis and when disposed inwardly of the shoulders 12, 13 is moved so that it no longer blocks the slot 14. The final blade is then inserted through the slot 14 and the whole blade assembly is moved in the direction of the arrow 24 (Fig. 3). When the plate 20 becomes aligned with the slot 14, a spring 21 moves the plate into the slot and into engagement with platforms 17 of adjacent blades 16. The platforms 17 may be provided with holes for a tool to depress the plate 20 for removal of the blades. To balance the rotor, the combined weight of the plate 20, spring housing 22, 23, and spring 21 may equal the weight of the metal removed to produce the slot 14. Alternatively, two slots, diametrically opposed, each with its own closure member may be provided. A modified form of springing, Fig. 5 (not shown), comprises a stem or peg secured to the plate to which are secured two leaf-springs having upturned ends.