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    • 3. 发明授权
    • Channel inlet edge deburring for gas diffuser cases
    • 气体扩散器通道入口边缘去毛刺
    • US08613641B2
    • 2013-12-24
    • US12255838
    • 2008-10-22
    • Ioan SasuGaetan Boisclair
    • Ioan SasuGaetan Boisclair
    • B24B1/00
    • B24C1/083B24C3/327B24C5/04B24C5/06B24C5/064
    • A method of deburring channel inlet edges inside a cavity of a gas diffuser case is disclosed. The diffuser case has a plurality of channels each having an inner surface and an inlet edge defining an inlet of the channel. The surfaces of adjacent channels co-operate to provide said inlet edge therebetween. The inlet edges of the channels are provided in an inwardly facing circular array around a central axis of the gas diffuser case. The method comprises: inserting a tool head having at least one nozzle in the cavity of the gas diffuser case; and then ejecting abrasive particles from at least one nozzle towards at least one of the channel inlet edges of the gas diffuser case to at least one of decrease a radius of at least one said edge and improve a smoothness of at least one said surface.
    • 公开了一种在气体扩散器壳体的空腔内去通道通道入口边缘的方法。 扩散器壳体具有多个通道,每个通道具有限定通道入口的内表面和入口边缘。 相邻通道的表面配合以在其间提供所述入口边缘。 通道的入口边缘围绕气体扩散器壳体的中心轴线设置成面向内的圆形阵列。 该方法包括:将具有至少一个喷嘴的工具头插入气体扩散器壳体的空腔中; 然后将磨料颗粒从至少一个喷嘴喷射到气体扩散器壳体的通道入口边缘中的至少一个,以至少一个减小至少一个所述边缘的半径并提高至少一个所述表面的平滑度。
    • 6. 发明申请
    • Discrete passage diffuser
    • 离散通道扩散器
    • US20050118019A1
    • 2005-06-02
    • US10983085
    • 2004-11-08
    • Douglas RobertsAndre LeBlancSuresh KackerPeter TownsendIoan Sasu
    • Douglas RobertsAndre LeBlancSuresh KackerPeter TownsendIoan Sasu
    • F02C3/08F01D9/04F04D29/44F01D1/02
    • F01D9/045F01D9/048F04D29/441F04D29/444F05D2250/52
    • A centrifugal compressor includes an impeller and a diffuser. The impeller has an inner integral hub with vanes thereon, is adapted to rotate within an outer shroud about a central longitudinal axis, and has a defined hub-to-shroud distribution of fluid exit angles. The diffuser, downstream from the impeller, comprises a plurality of circumferentially spaced discrete passages at least partially defining fluid paths through the diffuser, and angled such that adjacent discrete passages intersect each other to form an annular semi-vaneless diffuser inlet space. The discrete passages downstream of the semi-vaneless space each have an inlet therefrom and an outlet with a greater cross-sectional area than the inlet. The intersection of the annular semi-vaneless space and each discrete passage defines a leading edge thereof. Each discrete passage is defined by a wall bounding a cross-sectional area, the wall comprising at least a first substantially rectilinear portion and a second opposed convexly curved portion; the first substantially rectilinear portion is adjacent the hub of the impeller and the second opposed convexly curved portion is adjacent the outer shroud. The leading edge of each discrete diffuser passage provides a close incidence angle match with the fluid exit angles of the impeller.
    • 离心压缩机包括叶轮和扩散器。 叶轮具有内部具有叶片的内部整体式轮毂,其适于围绕中心纵向轴线在外部护罩内旋转,并且具有限定的流体出口角度的轮毂对护罩分布。 在叶轮下游的扩散器包括多个周向间隔开的离散通道,其至少部分地限定通过扩散器的流体路径,并且成角度使得相邻的离散通道彼此相交以形成环形半无叶扩散器入口空间。 半无叶空间下游的离散通道各自具有入口和与入口相比更大的横截面面积的出口。 环形半无空间空间和每个离散通道的交点限定其前缘。 每个离散的通道由限定横截面积的壁限定,所述壁包括至少第一基本直线部分和第二相对的凸形弯曲部分; 第一大致直线部分邻近叶轮的轮毂并且第二相对的凸形弯曲部分邻近外护罩。 每个离散扩散通道的前缘提供与叶轮的流体出口角度的近似入射角度。
    • 8. 发明授权
    • Discrete passage diffuser
    • 离散通道扩散器
    • US06589015B1
    • 2003-07-08
    • US10140101
    • 2002-05-08
    • Douglas Allan RobertsAndré Denis LeBlancSuresh Chandra KackerPeter Ralph TownsendIoan Sasu
    • Douglas Allan RobertsAndré Denis LeBlancSuresh Chandra KackerPeter Ralph TownsendIoan Sasu
    • F01D904
    • F01D9/045F01D9/048F04D29/441F04D29/444F05D2250/52
    • A centrifugal compressor includes an impeller and a diffuser. The impeller has an inner integral hub with vanes thereon, is adapted to rotate within an outer shroud about a central longitudinal axis, and has a defined hub-to-shroud distribution of fluid exit angles. The diffuser, downstream from the impeller, comprises a plurality of circumferentially spaced discrete passages at least partially defining fluid paths through the diffuser, and angled such that adjacent discrete passages intersect each other to form an annular semi-vaneless diffuser inlet space. The discrete passages downstream of the semi-vaneless space each have an inlet therefrom and an outlet with a greater cross-sectional area than the inlet. The intersection of the annular semi-vaneless space and each discrete passage defines a leading edge thereof. Each discrete passage is defined by a wall bounding a cross-sectional area, the wall comprising at least a first substantially rectilinear portion and a second opposed convexly curved portion; the first substantially rectilinear portion is adjacent the hub of the impeller and the second opposed convexly curved portion is adjacent the outer shroud. The leading edge of each discrete diffuser passage provides a close incidence angle match with the fluid exit angles of the impeller.
    • 离心压缩机包括叶轮和扩散器。 叶轮具有内部具有叶片的内部整体式轮毂,其适于围绕中心纵向轴线在外部护罩内旋转,并且具有限定的流体出口角度的轮毂对护罩分布。 在叶轮下游的扩散器包括多个周向间隔开的离散通道,其至少部分地限定通过扩散器的流体路径,并且成角度使得相邻的离散通道彼此相交以形成环形半无叶扩散器入口空间。 半无叶空间下游的离散通道各自具有入口和与入口相比更大的横截面面积的出口。 环形半无空间空间和每个离散通道的交点限定其前缘。 每个离散的通道由限定横截面积的壁限定,所述壁包括至少第一基本直线部分和第二相对的凸形弯曲部分; 第一大致直线部分邻近叶轮的轮毂并且第二相对的凸形弯曲部分邻近外护罩。 每个离散扩散通道的前缘提供与叶轮的流体出口角度的近似入射角度。
    • 9. 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。