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    • 61. 发明申请
    • Dielectric Isolators
    • 绝缘隔离器
    • US20100001512A1
    • 2010-01-07
    • US12347516
    • 2008-12-31
    • Clifton P. BreaySara D. PfannenstielStephen C. MatthewsEdward W.S. Bryant
    • Clifton P. BreaySara D. PfannenstielStephen C. MatthewsEdward W.S. Bryant
    • F16L55/00
    • F16L25/023B64D37/32B64D45/02F16L5/12F16L25/021F16L25/025F16L39/005H01B17/42Y02T50/44Y10S977/734Y10S977/742Y10S977/753Y10T428/1372Y10T428/249945Y10T428/249947Y10T428/249952Y10T428/2826
    • The present application is directed to dielectric isolators for use in aircraft fuel systems to control lightning induced current and allow dissipation of electrostatic charge. The dielectric isolators are configured to have a high enough impedance to limit lightning currents to low levels, but low enough impedance to allow electrostatic charge to dissipate without allowing buildup. Although the dielectric isolators may develop a potential difference across the dielectric length due to the effects of lightning currents and its inherent impedance, they are configured to withstand these induced voltages without dielectric breakdown or performance degradation. In one embodiment, the dielectric isolator includes a tube constructed of a composition including a thermoplastic organic polymer (e.g., PEEK) and carbon nanotubes, and a pair of fittings attached to opposing ends of the tube. In another embodiment, the dielectric isolator includes a tube, an outer annular portion, and an interconnecting web, each constructed from the composition including a thermoplastic organic polymer (e.g., PEEK) and carbon nanotubes. This later embodiment is an integrally formed one-piece structure. The dielectric isolator is capable of exhibiting an electrical resistance from about 105Ω to 108Ω at an applied potential of greater than 500 volts DC when measured from one fitting to the other fitting.
    • 本申请涉及用于飞行器燃料系统中的电介质隔离器,以控制雷电感应电流并允许静电电荷消散。 介质隔离器被配置为具有足够高的阻抗以将雷电电流限制到低电平,但是足够低的阻抗以允许静电电荷消散而不允许积聚。 尽管由于雷电流及其固有阻抗的影响,电介质隔离器可能在整个电介质长度上产生电位差,但是它们被配置为承受这些感应电压而没有电介质击穿或性能下降。 在一个实施例中,电介质隔离器包括由包括热塑性有机聚合物(例如PEEK)和碳纳米管的组合物构成的管和连接到管的相对端的一对配件。 在另一个实施例中,介电隔离器包括管,外环形部分和互连网,每个由包含热塑性有机聚合物(例如PEEK)和碳纳米管的组合物构成。 该后续实施例是整体形成的一体式结构。 当从一个配件到另一个配件测量时,电介质隔离器能够在大于500伏直流的施加电位下显示大约105Om至108ohm的电阻。
    • 66. 发明授权
    • Annular sliding fluoroplastics member, and method of producing an annular sliding fluoroplastics member
    • 环状滑动氟塑料构件,以及环形滑动氟塑料构件的制造方法
    • US07491446B2
    • 2009-02-17
    • US09270673
    • 1999-03-16
    • Takahisa UedaTerumasa Yamamoto
    • Takahisa UedaTerumasa Yamamoto
    • B32B27/00
    • F16C33/201F16C33/16F16C33/24Y10T428/139Y10T428/24058Y10T428/24124Y10T428/24994Y10T428/249942Y10T428/249947Y10T428/3154
    • The present invention relates to an annular sliding fluoroplastics member which is requested to have good mechanical properties, resistance to abrasion and wear, thermal conductivity, heat resistance, and the like, and also to a method of producing such an annular sliding fluoroplastics member. The annular sliding fluoroplastics member of the invention has a composite structure which mainly consists of fluorine plastics and short fibers, and 20 or more wt. % of short fibers by weight of a total amount of the short fibers are oriented in a direction along which a burden of a load is large. According to this configuration, the buckling resistance and the pressure resistance are enhanced. A member having a high buckling resistance can be used in a thrust slide bearing or a thrust washer in which a large press load is applied in the axial direction, and a member having a high pressure resistance can be used in a radial slide bearing in which a large press load is applied in a radial direction. In some cases, in the annular sliding fluoroplastics member of the invention, filaments consisting of long fibers may be stitched to the inner peripheral face or the like, the surface is covered with an expanded graphite sheet, or the member is impregnated with a lubricant. The member having such a structure is excellent in buckling resistance and pressure resistance in a radial direction, and also in resistance to abrasion and wear, thermal conductivity, etc. According to the production method of the invention, a cutting work step can be omitted, and therefore materials can be prevented from being wastefully used, and the production cost can be reduced.
    • 本发明涉及要求具有良好机械性能,耐磨性和耐磨性,导热性,耐热性等的环形滑动氟塑料构件,以及制造这种环形滑动氟塑料构件的方法。 本发明的环状滑动氟塑料构件具有主要由氟塑料和短纤维组成的复合结构,并且具有20重量或更多重量的复合结构。 短纤维的总量的重量的短纤维的百分比沿负载负担较大的方向取向。 根据该结构,抗弯曲性和耐压性提高。 具有高抗弯曲性的构件可以用在推力滑动轴承或推力垫圈中,其中沿轴向施加大的压力载荷,并且可以在径向滑动轴承中使用具有高耐压性的构件,其中 在径向上施加大的压力载荷。 在一些情况下,在本发明的环状滑动氟塑料部件中,由长纤维构成的细丝可以缝合到内周面等,表面被膨胀石墨片覆盖,或者该部件浸渍有润滑剂。 具有这种结构的构件在径向方向上的抗弯曲性和耐压性以及耐磨损和耐磨性,导热性等方面优异。根据本发明的制造方法,可以省略切削加工步骤, 因此可以防止材料浪费使用,并且可以降低生产成本。