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 αK, increasing along radial height of the root twist gradient, Gr.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 RD 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 Rp.ch. peripheral contour of the flowing part and with the ratio of the radius RD To medium height Hav the blade profile RD/Hav=(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
展开▼
机译：领域：机械工程。;实质：TRE HPC转子轴第九级的叶轮包含一个盘和形成叶片环的叶片。该盘包括具有中心孔的轮毂，主体和轮缘。每个叶片都包含一个柄，一个由凹形槽和凸形背面形成的具有轮廓的叶片根部，以及位于叶片根部两侧的根部搁板，与圆盘的边缘一起形成轴颈的衬套表面。流动的部分。在这种情况下，叶片根部区域中的车身侧边缘的弦在转子轴投影的情况下产生了叶片根部安装角度α K ，沿着根部扭转梯度的径向高度增加，G rt =（220.8÷317.2）[度/ m]。叶片根部具有相对于转子轴线可变的轴向扭曲，并随着距转子轴线的径向距离而增加。圆盘边缘的外表面具有半径，该半径在HPC的轴向截面中沿工作流体流动方向增大。在腹板的平均径向平面上，从HPC的转子轴到轮辋上表面的半径R D 盘为半径R p.ch的（0.78÷0.97） 。 流动部分的外围轮廓，半径为RD与中等高度H av 的比率，叶片轮廓R D / H av =（8.8÷13.2）。圆盘的边缘设有环形搁板，用于连接到HPC转子第八级和圆盘迷宫的配对圆盘的边缘搁板，并通过耦合元件将其与所述圆盘组合成包装。效果：提高效率转子高压压缩机第九级叶轮的使用寿命在不增加物料容量的情况下扩展时，以及在压缩机所有工作模式下气体动态稳定资源的增加。; 24 cl，9 dwg
展开▼
