ROTOR EIGHTH STAGE IMPELLER OF HIGH-PRESSURE COMPRESSOR (HPC) OF TURBOJET ENGINE (VERSIONS), HPC ROTOR IMPELLER DISC, HPC ROTOR IMPELLER BLADE, HPC ROTOR IMPELLER BLADE RING Russian patent published in 2017 - IPC B01J3/00 

FIELD: engine devices and pumps.

SUBSTANCE: rotor eighth stage impeller of TJE HPC contains a disc and rotor blades, forming a blade ring. The disc includes a hub with a central hole, curtain, and rim. Each blade consists of a shank, airfoil with a profile, formed by concave pressure side and convex back, and a root shroud on both sides of the feather, forming a bushing surface of the flow part together with the disc rim. In this case, the chord of the lateral edges of wing in the blade root zone forms, with the axis of the rotor in projection, the angle of installation of the wing α_k, increasing along the radial height of the wing with a gradient of wing twist, constituting G_wt=(170.2÷242.9) [deg/m]. The wing blade is designed with the axial twist, variable relative to the rotor axis, that increases radially receding from the rotor axis. The exterior surface of disc rim has the radius which increases in the axial section of HPC towards the working medium flow. The radius R_D Disk from the rotor axis of the HPC to the upper surface of the rim in the mean radial plane of the web is (0.74÷0.96) of the radius R_P/c , the peripheral contour of the flowing part, and with the ratio of the radius R_D to medium height H_av of the profile of the blade R_D/ H_Wed=(8.3÷12.4). The rim of the disk is provided with annular flanges for releasably connecting to the rim flanges of the rims of the seventh and ninth stages of the rotor of the HPC and combining it into the bag with the discs and with the disk of the labyrinth by means of coupling elements.

EFFECT: increasing the efficiency and increasing gas dynamic stability on all operating modes of the compressor when the service life of the rotor of the sixth stage of high-pressure compressor rotor increases without increasing the material consumption.

24 cl, 9 dwg