GB190622690A - Improvements in Elastic-fluid Turbines, Turbo-compressors, Turbine Fans, and the like. - Google Patents

Abstract

22,690. Gelpke, V., and Kugel, P. Oct. 13. Elastic-fluid turbines.-Relates to the setting and fixing of blades in turbines, turbine fans, &c. Two or more strips b<1>, b<2>, Figs. 1 and 9, are perforated to accommodate the roots of the blades a. The blades are secured in position by blocks d, which engage cot-away parts of the blade roots, or by any suitable means. Instead of the 'strips b<1>, b<2> being made in the form of continuous rings, they may be formed as filling-pieces, one piece being placed between two adjacent blades at the top of the root and another at the bottom. In a modification, the rings b<1>, b<2> are made of angular sections so as to engage the blocks d more securely. In another modification, the lower ring b<1> is replaced by two copper rings which are pressed by the blocks d against the roots of the blades. In a further modification, the blade roots are made with studs which engage with the drum, the ring b<1> again being dispensed with. One spacing-ring only need be used if the blades are prolonged so far toward the centre of the drum that their roots abut against each other. The blocks d may be made integrally with the disks in that type of turbine in which the rotor consists of a number of parallel bladed disks. The outer ends of the vanes may be joined together and fitted with shrouds in a manner similar to that described above. The invention is also applicable to guides.