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    • 1. 发明授权
    • Integrated duct diffuser
    • 集成管道扩散器
    • US06471475B1
    • 2002-10-29
    • US09616998
    • 2000-07-14
    • Ioan SasuAndre LeBlancMichel Bellerose
    • Ioan SasuAndre LeBlancMichel Bellerose
    • F01D102
    • F04D29/444F05D2250/52
    • The invention provides a diffuser assembly constructed of internal and external concentrically nested bowl-shaped shells for directing an outward flow of compressed air from a centrifugal compressor impeller to an axially rearward diffused annular flow. One of the shells is formed with grooves separated by seam edges and the other shell includes a smooth surface of revolution. The grooves on the one shell are closed by the other shell when the two shells are nested together and the seam edges are secured to the smooth surface by fastening means thus defining individual diffuser ducts extending from the compressor impeller to the outer shell edges. The shells can be easily manufactured from metal castings and sheet metal respectively, thereby eliminating much of the cost and the time involved in fabricating prior art diffusers of multiple formed pipes brazed to a separately machined hub. This construction can be easily reinforced for vibration control and the thickness of diffuser duct walls can be optimized for improved performance and minimum weight. The designers are freed from many of the constraints imposed by conventional diffuser design. The shape and cross-section of the diffuser ducts become completely independent of the manufacturing method, permitting the diffuser duct shape to be optimized for aerodynamic efficiency. The costs of production are reduced since tooling costs and manufacturing complexity are dramatically reduced when only two shell parts are required.
    • 本发明提供了一种由内部和外部同心嵌套的碗形壳体构成的扩散器组件,用于将离心式压缩机叶轮向外的压缩空气流引导到轴向向后扩散的环形流。 其中一个壳体形成有由接缝边缘分开的沟槽,另一个壳体包括平滑的旋转表面。 当两个壳嵌套在一起时,一个壳体上的凹槽由另一个壳体封闭,并且接缝边缘通过紧固装置固定到光滑表面,从而限定从压缩机叶轮延伸到外壳边缘的各个扩散器管道。 壳可以容易地由金属铸件和金属板制成,从而消除了制造现有技术的多个形成的钎焊到单独加工的毂的成形管的扩散器所花费的大量成本和时间。 这种结构可以轻松加强振动控制,扩散管壁的厚度可以优化,以提高性能和最小重量。 设计师摆脱了常规扩散器设计所施加的许多限制。 扩散器管道的形状和横截面完全独立于制造方法,允许对空气动力学效率优化扩散器管道形状。 生产成本降低,因为只需要两个壳体部件时,模具成本和制造复杂性就会大大降低。