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

FIELD: machine engineering.

SUBSTANCE: impeller wheel of the ninth stage of the TRE HPC rotor shaft contains a disc and blades that form a blade ring. The disc includes a hub with a central hole, a body and a rim. The each blade contains a shank, a blade root with a profile, formed by a concave trough and a convex back, and a root shelf on both sides of the blade root, forming, together with the rim of the disc, a bushing surface of the flowing part. In this case, the chord of side edges of the body in the root zone of the blade creates with the rotor axis in projection a blade root installation angle α_K, increasing along radial height of the root twist gradient, G_r.t.=(220.8÷317.2) [degrees/m]. The blade root is featured with variable axial twist relative to the rotor axis, increasing with a radial distance from the axis of the rotor. The outer surface of the disc rim is made with a radius, increasing in the axial section of the HPC in the working fluid flow direction. 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 (0.78÷0.97) of the radius R_p.ch. peripheral contour of the flowing part and with the ratio of the radius RD To medium height H_av the blade profile R_D/H_av=(8.8÷13.2). The rim of the disk is provided with annular shelves for connecting to mating discs rim shelves of the eighth stage of the HPC rotor and the disc labyrinth and combining it into the package with said discs by means of coupling elements.

EFFECT: increase the efficiency and increase of gas dynamic stability resource in all operating modes of the compressor when service life of the ninth stage impeller wheel of the rotor high pressure compressor expands without increasing the material capacity.

24 cl, 9 dwg