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A NOVEL WELDLESS FOILS-CASE ATTACHMENT FOR GAS FOIL BEARINGS

机译:新型的无气膜盒,用于气膜轴承

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Gas Foil Bearings (GFB) have a wide field of applications, from air cycle machines to microturbomachinery. A GFB basically consists of a foil (top foil) that lies over a corrugated foil (bump foil) that acts as a compliant spring. The rotation of the shaft introduces the fluid into the bearing and the pressure generated into the gap between the shaft and the top foil supports the rotor. The foils are attached to the case in a fixed point; usually they are welded to the bearing case. In addition to being rather cumbersome to build, this welded union is a potential point of failure. This work presents a new proposal of foils and case union. Foils are not welded to the case; they are placed or slid into a groove which avoids the strain concentration. This also permits the replacement of any foil in case of damage and to change the bump foil to modify the load capacity or the rotordynamic coefficients if required. The proposed assembly is experimentally tested by measuring its static stiffness in different radial directions of the fixed point. Results for static stiffness are presented and discussed.
机译:气箔轴承(GFB)的应用范围很广,从空气循环机到微型涡轮机械。 GFB基本上由箔片(顶部箔片)组成,该箔片位于起柔顺弹簧作用的波纹箔片(凹凸箔片)上。轴的旋转将流体引入轴承,而在轴和顶部金属箔之间的间隙中产生的压力则支撑转子。箔片固定在外壳上;通常它们被焊接到轴承箱上。除了建造起来相当麻烦之外,这种焊接的接头也是潜在的故障点。这项工作提出了箔纸和箱子结合的新建议。箔没有焊接到外壳上;将它们放置或滑入避免应变集中的凹槽中。这也允许在损坏的情况下更换任何箔片,并在需要时更换凸块箔片以改变负载能力或转子动力系数。通过在固定点的不同径向方向上测量其静态刚度,对所提出的组件进行了实验测试。提出并讨论了静态刚度的结果。

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