FIELD: machine engineering.;SUBSTANCE: impeller wheel of the fifth 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, increasing along radial height of the root twist gradient αK, Gr.t.=(155.9÷222.7) [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. Rd disc radius from the HPC rotor axis to the upper surface of the rim in the mean radial plane of the body is (0.69÷0.95) from the Rp.ch. radius of peripheral contour of the flowing part. The impeller wheel is made with a ratio of RD disc radius to an average height Hav of blade root profile, constituting RD/Hav=(5.3÷7.8). The disc rim is provided with annular shelves for split connection with mating shelves of the rim of the fourth and sixth stages of the HPC rotor.;EFFECT: increase the efficiency and increase of gas dynamic stability resource in all operating modes of the compressor when service life of the seventh stage impeller wheel of the rotor high pressure compressor expands without increasing the material capacity.;22 cl, 9 dwg
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机译:领域:机械工程;实质:TRE HPC转子轴第五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,以及在叶片根部两侧的根部搁板,与圆盘的边缘一起形成流动部分的衬套表面。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,沿着根部扭转梯度α K Sub>的径向高度增加,G rt Sub> =(155.9÷222.7)[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。从HPC转子轴到机身平均径向平面上的轮辋上表面的R d Sub>圆盘半径为R p.ch的(0.69÷0.95)。 Sub >流动部分的外围轮廓半径。叶轮的圆盘半径为R D Sub> /叶片根部轮廓的平均高度H av Sub>,构成R D Sub> / H av Sub> =(5.3÷7.8)。圆盘轮缘设有环形架,用于与HPC转子第四和第六级轮缘的配对架分开连接;效果:在维修时,在压缩机的所有工作模式下提高效率并增加气体动态稳定性资源转子高压压缩机第七级叶轮的使用寿命在不增加物料容量的情况下得以扩展。; 22 cl,9 dwg
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