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    • 22. 发明申请
    • Variable airfoil wing
    • 可变翼型翼
    • US20020134888A1
    • 2002-09-26
    • US09816185
    • 2001-03-26
    • Allison Earl Hall
    • B64C001/00B64C003/00B64C005/00
    • B64C3/50Y02T50/14
    • The invention lies in the field of fluid dynamics. In particular, the invention pertains to aircraft airfoils and wing designs. The variable airfoil wing is a simple concept which divides an aircraft wing into a forward segment and a rearward segment. The wing forward segment is fixed and the wing rearward segment is movable. Using a symmetrical airfoil design as the base wing shape, the rearward segment is rotated downward to increase the wing camber. When utilized in accordance with specific limitations, the wing design offers a broad range of aerodynamic capabilities.
    • 本发明在于流体动力学领域。 特别地,本发明涉及飞机翼型和机翼设计。 可变翼型翼是一种将飞机机翼分成前段和后段的简单概念。 机翼前段固定,后翼段可移动。 使用对称的翼型设计作为基座翼形,向后的部分向下旋转以增加机翼弧度。 当根据具体限制使用时,机翼设计提供了广泛的空气动力学能力。
    • 23. 发明申请
    • Airfoil suitable for forward and reverse flow
    • 翼型适用于正向和反向流动
    • US20020005458A1
    • 2002-01-17
    • US09877268
    • 2001-06-08
    • Jay W. Carter JR.John G. Roncz
    • B64C003/00
    • B64C3/14B64C27/023B64C27/467B64C2003/147Y02T50/12
    • An airfoil has a concave rear top surface, a concave rear bottom surface, and a rounded trailing edge to increase the lift-to-drag ratio of the airfoil at small angles of attack when air is flowing from the trailing edge to the leading edge (reverse flow), while maintaining a high lift-to-drag ratio when air is flowing from the leading edge to the trailing edge (forward flow). The airfoil design results from a performance compromise between forward and reverse airflow. For structural reasons, the thickness of the airfoil in proportion to its chord length may change along the blade radius. Thus, a family of airfoils has been designed that promote low-drag laminar flow with both forward and reverse flow, permit operation of the airfoil with reverse flow over a reasonable range of angles of attack, and achieve high lift with forward flow.
    • 机翼具有凹的后顶表面,凹后的后底表面和圆形的后缘,以当空气从后缘流到前缘时在较小的迎角下增加翼型的升降比( 反向流动),同时当空气从前缘流向后缘(向前流动)时保持较高的提升阻力比。 机翼设计是由于正向和反向气流之间的性能折衷。 由于结构原因,与翼弦长度成比例的翼型件的厚度可能沿叶片半径而变化。 因此,已经设计了一系列翼型,其促进具有正向和反向流动的低阻力层流,允许在合适的迎角范围内以相反的流动操作翼型件,并且具有向前流动的高升程。
    • 24. 发明申请
    • Blade member for airplane
    • 飞机的叶片成员
    • US20040124310A1
    • 2004-07-01
    • US10619623
    • 2003-07-16
    • Daiya YamashitaFumihiko ShikanoHiroshi KatoAkira KanekoTakumi Shibata
    • B64C001/00B64C003/00B64C005/00
    • B23H9/00B23H7/02B23H9/10B64C27/473
    • It is an object to provide a blade member for an airplane which is simple in structure, and moreover is excellent with respects to weight, aerodynamic performance, cost, strength and durability. A vane of a double-slotted flap includes: an outer skin area surrounded by a first outer skin, a second outer skin, a leading edge and a trailing edge each having a predetermined wall thickness. Front and rear reinforcing areas are provided that extend in a span direction within the outer skin area and are connected to the first outer skin and the second outer skin. The outer skin area and the reinforcing areas are integrally formed by wire electrical discharge-machining. The first outer skin and the second outer skin respectively have thickened portions thicker than the other portions, and the trailing edge is formed to have a thickness which is approximately zero. This blade member can be simplified in structure, leading to reductions in the number of parts, number of assembling steps and weight. Moreover, no step nor seam is generated on a surface of the blade member, and hence it is possible to prevent an increase in drag and the generation of corrosion.
    • 本发明的目的是提供一种结构简单的用于飞机的叶片构件,并且在重量,空气动力学性能,成本,强度和耐久性方面都是优异的。 双开口翼片的叶片包括:由第一外皮,第二外皮,前缘和后缘围绕的外皮区域,每个具有预定的壁厚。 提供前后加强区域,其在外皮肤区域内沿跨度方向延伸并连接到第一外皮和第二外皮。 外皮区域和加强区域通过电线放电加工一体形成。 第一外皮和第二外皮分别具有比其他部分更厚的加厚部分,并且后缘形成为具有近似为零的厚度。 该叶片构件可以简化结构,从而减少零件数量,组装步骤数量和重量。 此外,在叶片构件的表面上不产生台阶或接缝,因此可以防止阻力的增加和腐蚀的产生。
    • 26. 发明申请
    • Trailing edge shape of laminar-flow airfoil
    • 层流翼型的后缘形状
    • US20030230669A1
    • 2003-12-18
    • US10373694
    • 2003-02-27
    • Michimasa FujinoYoshinori Wariishi
    • B64C003/00
    • B64C3/14B64C2003/149Y02T50/12
    • An upper wing surface of a laminar-flow airfoil includes: a front profile portion which has a positive curvature radius, and which is provided to extend from a leading edge to a largest-thickness point located at a position corresponding to 38% of a wing chord length. The front profile portion forms a laminar-flow boundary layer. A central profile portion has a positive curvature radius and is provided to extend from the largest-thickness point to the vicinity of a position corresponding to 90% of the wing chord length at which a value obtained by dividing a thicknesswise difference between the position and the largest-thickness point by a distance in a direction of the wing chord from the largest-thickness point is equal to or smaller than 0.12. The central profile portion forms a gentle pressure gradient to suppress separation of the boundary layer and a rear profile portion has a negative curvature radius which is provided to extend from the vicinity of a position corresponding to 95% of the wing chord length to the trailing edge. The rear profile portion forming a pressure gradient is steeper than that formed by the central profile portion to induce slight separation of the boundary layer, whereby a head-lowering pitching moment about an aerodynamic center is decreased. Thus, it is possible to decrease an undesirable head-lowering pitching moment, while maintaining an effect of decreasing a drag on a laminar-flow airfoil.
    • 层流翼型件的上翼面包括:前轮廓部分,其具有正曲率半径,并且设置成从位于对应于翼的38%的位置的前缘到最大厚度点延伸 弦长。 前轮廓部分形成层流边界层。 中心轮廓部分具有正曲率半径,并且被设置成从最大厚度点延伸到对应于翼弦长度的90%的位置附近,在该位置处,通过将位置和位置之间的厚度差除以 最大厚度点距离最大厚度点的翼弦方向的距离等于或小于0.12。 中央轮廓部分形成温和的压力梯度以抑制边界层的分离,并且后轮廓部分具有负曲率半径,该曲率半径设置为从对应于翼弦长度的95%的位置附近延伸到后缘 。 形成压力梯度的后轮廓部分比由中央轮廓部分形成的后轮廓部分更陡,以引起边界层的轻微分离,从而降低了围绕空气动力学中心的头部降低俯仰力矩。 因此,可以在保持降低层流翼型上的阻力的作用的同时降低不期望的头降低俯仰力矩。