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    • 1. 发明申请
    • PROCESS FOR CALCULATING AN ANGULAR SPACING BETWEEN THE BLADES OF AN AXIAL FAN
    • 用于计算轴流风机叶片之间的角度间距的过程
    • WO2017085680A1
    • 2017-05-26
    • PCT/IB2016/056964
    • 2016-11-18
    • SPAL AUTOMOTIVE S.R.L.
    • DE FILIPPIS, Pietro
    • F04D29/32F04D29/66
    • F04D29/328F04D29/666
    • Described is a process for calculating an angular spacing of an axial fan (1) comprising a hub (2) and a number z of blades (3) extending from the hub wherein an angular position of the various blades is indicated as α 1 ,....,α 2 assuming α 1 =0, and an angular difference between the various blades is indicated as ε į =α į +1 − α į ,į=1,...., z-1, ε z = 360° - α z , comprising a step of setting up a calculating system comprising a plurality of mathematical problems each an expression of a constraint which the angular spacing must satisfy; the calculating system comprising a first mathematical problem which requires that the fan (1 ) is statically balanced, a second mathematical problem which requires that adjacent blades (3) are not superposed and a third mathematical problem which requires that the angular differences ε 1 ,...,ε n are all different to each other.
    • 描述了用于计算包括轮毂(2)和从轮毂延伸的叶片(3)的数量z的轴流式风扇(1)的角间距的过程,其中各种角度位置 假设α1= 0,叶片被表示为α1,...,α2,并且各种叶片之间的角度差是 表示为ε +1 z = 1,...,z-1,εz = 360°。 包括建立包括多个数学问题的计算系统的步骤,每个数学问题都是角间距必须满足的约束的表达式; 该计算系统包括要求风扇(1)静态平衡的第一数学问题,要求相邻叶片(3)不重叠的第二数学问题以及第三数学问题,该第三数学问题要求角度差ε< 1,...,ε 是彼此不同的。
    • 3. 发明申请
    • AXIAL FLOW FAN
    • 轴流风扇
    • WO02027191A1
    • 2002-04-04
    • PCT/US2001/026987
    • 2001-08-30
    • F04D29/32F04D29/38F04D29/66B64C11/18
    • F04D29/666F04D29/328F04D29/384
    • An axial flow fan (6a) comprises a hub (76) rotatable on a central axis and a plurality of radial blades (40,42,44,46,48,50) extending from the hub periphery, each having a root portion adjacent the hub (76) and each having a tip portion spaced radially from the hub (76) and surrounded by an annular band (78). The root portions are substantially evenly spaced circumaxially at their junctions with the hub (76) and at least some of the tip portions are substantially unevenly spaced circumaxially. The latter is due to the condition that blade center lines are pivoted through unequal arcs about points along the junctions between the hub (76) and the blades root portions.
    • 轴流风扇(6a)包括可在中心轴线上旋转的毂(76)和从轮毂周边延伸的多个径向叶片(40,42,44,46,48,50),每个叶片具有邻近 轮毂(76),并且每个具有与轮毂(76)径向间隔开并由环形带(78)围绕的尖端部分。 根部在其与毂(76)的接合处基本均匀地间隔开,并且至少一些尖端部分基本上不均匀地间隔开。 后者是由于叶片中心线绕着毂(76)和叶片根部之间的接合处的点绕不平等的圆弧枢转的情况。