GB916001A - Improvements in or relating to rotors for turbines and compressors - Google Patents

Abstract

916,001. Axial flow turbines and compressors. PRVNI BRNENSKA STROJIRNA, ZAVODY KLEMENTA GOTTWALDA NARODNI PODNIK. Feb. 9, 1961, No. 4934/61. Class 110 (3). In a rotor for a turbine or compressor comprising blades inserted in a fir-tree peripheral groove, circular cut-outs are provided in both sides of the peripheral groove to permit insertion of the blades, and the blades are spaced apart by two-part spacers. The teeth 17, Fig. 1a, of the fir-tree peripheral groove are provided with circular cut-out 2 to allow the blade roots to be inserted into the peripheral groove. To permit insertion the blades are turned into the position shown in the left-hand side of Fig. 2 and, after insertion at the cut-outs 2, are turned into the normal position shown in the right-hand side of Fig. 2 and slid along the peripheral groove. Some of the blade roots are of reduced peripheral width to provide room for the insertion of the last two blade roots, which are of normal width. Subsequently, twopart spacers are inserted beside the narrower roots. The final two-part spacer is of the form shown at 14 in Fig. 4, and is provided with a locking wedge 15 which is kept in place by bending tongues 16 over it.