US2429324A - Rotor for centrifugal compressors - Google ...
Fig. 2 is a diagrammatic view, partly in section, of a profile milling machine suitable for making the rotor. Figs. 3 and 4 show details of the rotor in crosssection. The rotor shown in Fig. 1 has screw-shaped blades 2, which are backwardly bent with respect to the direction of rotation A and whose boundary lines 3 are derived from the meridian ...