SECOND STAGE IMPELLER WHEEL OF HIGH PRESSURE COMPRESSOR (HPC) ROTOR OF TURBOCHARGER ENGINE (VARIANTS), HPC ROTOR IMPELLER WHEEL DISC, HPC ROTOR IMPELLER WHEEL BLADE, HPC ROTOR IMPELLER WHEEL BLADE RING

FIELD: machine engineering.SUBSTANCE: impeller wheel of the second 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. 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, increasing along radial height of the root twist gradient, G=(150.2÷216.2) [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. Rdis radius from the HPC rotor axis to the upper surface of the rim in the mean radial plane of the body is (0.59÷0.85) from the Rradius of peripheral contour of the flowing part. The impeller wheel is made with a ratio of Rdisc radius to an average height Hof blade root profile, constituting R/H=(2.3÷3.6). The disk blade is provided with annular beads for releasably connecting flanges adjacent to the web on both sides of the journal of the front support of the rotor of the HPC and the conical diaphragm of the disc of the fourth stage.EFFECT: increase the efficiency and increase of gas dynamic stability resource in all operating modes of the compressor when service life of the second stage impeller wheel of the rotor high pressure compressor expands without increasing the material capacity.22 cl, 9 dwg Группа изобретений, связанных единым творческим замыслом, относится к области авиадвигателестроения. Рабочее колесо второй ступени вала ротора КВД ТРД содержит диск и образующие лопаточный венец рабочие лопатки. Диск включает ступицу с центральным отверстием, полотно и обод. Лопатка содержит каждая хвостовик, перо с профилем, образованным вогнутым корытом и выпуклой спинкой, и корневую полку по обе стороны пера, формируя совместно с ободом диска втулочную поверхность проточной части. При этом хорда боковых кромок пера в корневой зоне лопатки образует с осью ротора в проекции угол установки пера α, нарастающий по радиальной высоте пера с градиентом закрутки пера, составляющим G=(150,2÷216,2) [град/м].