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    • 6. 发明申请
    • GAS TURBINE ENGINE AIRFOIL TIP RECESSES
    • 气体涡轮发动机气翼提示
    • US20130089421A1
    • 2013-04-11
    • US13253328
    • 2011-10-05
    • Jeffrey Howard NussbaumAndrea MacPherson CoxCatherine Lee Pommer
    • Jeffrey Howard NussbaumAndrea MacPherson CoxLeslie Martin Pommer
    • F01D11/08
    • F01D5/20F05D2240/125
    • A gas turbine engine airfoil extending from an airfoil base to an airfoil tip at a free end of the airfoil and from a leading edge to a trailing edge of the airfoil has at least one recess extending into and circumferentially completely through the airfoil tip and located inwardly of the leading and trailing edges. The recess is located in an area of the airfoil tip subject to high tip vibratory stress and or rubs and may be a circular scallop having a scallop radius and a maximum depth of a few mills in a range of about 0.005-0.01 inches as measured from a nominal tip edge without the recess. The airfoil may be on a radial blade, a stator vane, or an impeller blade. An annular tip seal may surround a plurality of such airfoil tips with an airfoil tip clearance therebetween.
    • 从机翼基座延伸到翼型件的自由端并且从翼型的前缘到后缘的燃气涡轮发动机翼型件具有至少一个延伸到其中并沿圆周完全穿过翼型件末端的凹部,并位于内侧 的前缘和后缘。 该凹部位于翼尖尖端的区域中,受到高尖端振动应力的摩擦,并且可以是圆形扇贝,扇形半径和最大深度为几毫米,范围为约0.005-0.01英寸,从 无凹槽的公称顶端边缘。 翼型件可以在径向叶片,定子叶片或叶轮叶片上。 环形尖端密封件可以围绕多个这样的翼型件尖端,其间具有翼面顶端间隙。