ROTOR SIXTH 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 sixth 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, wing with a profile, formed by concave trench and buckled back, and a root shroud on both sides of wing, 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_w.t.=(170.2÷242.9) [deg/m]. The wing blade is designed with axial twist, variable relative to rotor axis that increases radially receding from the rotor axis. The exterior surface of disc rim has radius which increases in the axial section of HPC towards the working medium flow. The radius R_d of disk from the HPC rotor axis to the rim upper surface in the mean radial plane of the web is (0.71÷0.96) of the radius R_f.p. of peripheral contour of the flowing part. The impeller is designed with the ratio of R_d disc and the mean height H_mh of the wing blade profile, which is R_d/H_mh=(5.4÷8.1). The disk rim is provided with annular rim seats for a one-way connection with the counter disc rim seats of the fifth and seventh stages of the HPC rotor. The disk is provided with an annular conical element for an integral power connection with a conical diaphragm and subsequent detachable connection to the disk package of the seventh, eighth and ninth stages and the disk labyrinth.

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