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    • 11. 发明授权
    • Hollow fan blade for gas turbine engine
    • 用于燃气轮机的中空风扇叶片
    • US07070391B2
    • 2006-07-04
    • US10765741
    • 2004-01-26
    • Michael A. Weisse
    • Michael A. Weisse
    • F01D5/18
    • F01D5/18B23P15/04F01D5/147F04D29/324F05D2220/324F05D2220/36F05D2230/10F05D2230/60Y02T50/671Y02T50/676
    • Hollow fan blades for turbo fan gas turbine engines are formed of two separate detail halves. Each detail half has a plurality of cavities and ribs machined out to reduce weight. These detail halves are subsequently bonded and given an airfoil shape in the forming operation. In the present invention, the ribs are oriented biased to provide stiffness as needed in different sections of the fan blade with smooth transitions between regions. The ribs and cavities do not run solely radially or chordwise, but curve and change direction. The path of each cavity is curved sufficiently to eliminate any regions with long, straight cavities, which would have low inertia in cross sections through the cavity parallel to the rib. Preferably, cavities do not continue straight in any direction for lengths greater than half the blade chord (e.g. leading edge to trailing edge) before curvature causes the rib to intersect cross section.
    • 用于涡轮风扇燃气涡轮发动机的空心风扇叶片由两个独立的细节一半形成。 每个细节一半具有加工成多个空腔和肋,以减轻重量。 随后在成型操作中结合这些细部半部并给予翼型形状。 在本发明中,肋被定向偏置以根据需要在风扇叶片的不同部分中提供刚度,并且在区域之间具有平滑的过渡。 肋骨和空腔不能径向或弦向,而是曲线并改变方向。 每个腔的路径足够弯曲,以消除任何具有长而直的空腔的区域,这些区域通过平行于肋的空腔的横截面具有较低的惯性。 优选地,在弯曲导致肋与横截面相交之前,空腔不会在任何方向上持续直线长度大于叶片弦(例如前缘到后缘)的长度。
    • 12. 发明授权
    • Hollow fan blade for gas turbine engine
    • 用于燃气轮机的中空风扇叶片
    • US07052238B2
    • 2006-05-30
    • US10765593
    • 2004-01-26
    • Daniel J. WhitesellMichael A. WeisseChristopher Mark Palazzini
    • Daniel J. WhitesellMichael A. WeisseChristopher Mark Palazzini
    • F01D5/18
    • B23P15/04F01D5/147F01D5/18F04D29/324F05D2220/324F05D2220/36F05D2230/10Y02T50/671Y02T50/676Y10T29/49339
    • A hollow fan blade for turbo fan gas turbine engines is formed of two separate detail halves. Each detail half has a plurality of cavities and ribs machined out to reduce weight. These detail halves are subsequently bonded and given an airfoil shape in the forming operation. The present invention provides a hollow fan blade with internal cavity and rib geometry with improved durability that permits the bonding and forming to be performed without the need for gas pressurization. The ability to form the hollow fan blade of the present invention without gas pressurization is a result of the cavity and rib geometry and the orientation of the ribs. The ribs are tapered and transition into a compound radius of the floor that simulates the classical arch design element. The orientation of the ribs is generally in a parallel plane with the load vector that results from forming loads during the pre-form and final form operations. This orientation provides compressive stress transfer into the ribs and away from the concave and convex skins. The rib spacing is controlled where ribs can not be held in a parallel plane with the load vector.
    • 用于涡轮风扇燃气涡轮发动机的中空风扇叶片由两个单独的细节半部形成。 每个细节一半具有加工成多个空腔和肋,以减轻重量。 随后在成型操作中结合这些细部半部并给予翼型形状。 本发明提供一种具有内腔和肋几何结构的中空风扇叶片,其具有改进的耐久性,其允许在不需要气体加压的情况下执行粘结和成形。 在没有气体加压的情况下形成本发明的中空风扇叶片的能力是肋和肋的几何形状和取向。 肋骨是渐缩的,并转变成模拟古典拱形设计元素的地板的复合半径。 肋的取向通常在与预成型和最终成型操作期间形成载荷的负载向量平行的平面中。 该方向提供压缩应力传递到肋中并远离凹凸表皮。 肋条间距被控制,其中肋不能与负载矢量保持在平行的平面中。