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    • 4. 发明授权
    • Blading system and method for controlling structural vibrations
    • 用于控制结构振动的叶片系统和方法
    • US6102664A
    • 2000-08-15
    • US572395
    • 1995-12-14
    • Nhan Nguyen
    • Nhan Nguyen
    • F01D5/26F01D5/30F04D29/66F04D29/34
    • F01D5/3007F01D5/26F01D5/3092F04D29/668Y02T50/672Y02T50/673Y10S416/50
    • A new blading system for controlling the structural vibrations in axial-flow compressors, turbines, or fans, as in aircraft engines and like turbomachines including a stator disc and a rotor disc is presented. The rotor disc defines several radial hubs that retain the rotor blading systems. Each blading system includes a blade formed of an airfoil, and a root attachment which is dimensioned to fit within, and to engage a corresponding hub. Viscoelastic dampers are selectively applied to the outer surfaces of the root attachment on which compressive or shear forces are likely to develop, intermediate the root attachment and the hub, for compression therebetween upon rotation of the rotor disc, in order to dampen structural vibrations. One advantage presented by the viscoelastic dampers lies in its simplicity, efficiency, cost effectiveness, and its ability to be retrofitted into existing turbomachines with minor surface treatment of the root attachments. Furthermore, since the dampers are not exposed to the inflowing airstream, they do not affect the aerodynamic performance of the turbomachine. Another feature of the damping system is that it provides a significant source of damping to minimize destructive structural vibrations, thereby increasing the durability of the turbomachine, and reducing acoustic noise accompanying high amplitude vibrations.
    • 提出了一种用于控制轴流式压缩机,涡轮机或风扇中的结构振动的新的叶片系统,如在飞机发动机中,如涡轮机,包括定子盘和转子盘。 转子盘限定了几个保持转子叶片系统的径向毂。 每个叶片系统包括由翼型件形成的叶片和根部附件,根部附件的尺寸适于装配在相应的轮毂内并与其相啮合。 为了抑制结构振动,粘弹性阻尼器被选择性地施加到根部附件的外表面上,在该附件的外表面上可能产生压缩或剪切力,在根部附件和轮毂之间,在转子盘旋转之间,可以在根部附件和轮毂之间进行压缩。 粘弹性阻尼器提出的一个优点在于其简单性,效率,成本效益以及将其加工成现有涡轮机的能力,对根部附件进行了轻微的表面处理。 此外,由于阻尼器不暴露于流入的气流,它们不影响涡轮机的空气动力性能。 阻尼系统的另一个特征在于,它提供了一个重要的阻尼源,以减少破坏性结构振动,从而提高涡轮机的耐久性,并降低伴随高振幅振动的声学噪声。