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    • 1. 发明申请
    • ADDITIVE MANUFACTURED COMBUSTIBLE ELEMENT WITH FUEL AND OXIDIZER
    • 燃料和氧化剂的添加剂制造可燃组分
    • WO2016195762A1
    • 2016-12-08
    • PCT/US2016/015960
    • 2016-02-01
    • RAYTHEON COMPANY
    • DANFORTH, Jeremy, C.LANGHENRY, Mark, T.SUMMERS, Matt, H.PERDUE, Teresa E.
    • F02K9/12
    • C06B45/10B33Y10/00B33Y80/00C06B21/0033F02K9/12F05D2230/31
    • A combustible element includes regions of fuel material interspersed with regions of oxidizer material. The element may be made by additive manufacturing processes, such as three-dimensional printing, with the fuel material regions and the oxidizer material regions placed in appropriate locations in layer of the combustible element. For example, different extruders may be used to extrude and deposit portions of a fuel filament and an oxidizer filament at different locations in each layer of the combustible element. The combustible element may define a combustion chamber within the element, where combustion occurs when the combustible element is ignited. The fuel material and the oxidizer material may be selected, and their relative amounts may be controlled, such that desired relative amounts of fuel and oxidizer are present for combustion with desired characteristics, such as combustion rate.
    • 可燃元件包括散布有氧化剂材料区域的燃料材料区域。 该元件可以通过添加剂制造工艺(例如三维印刷)制成,其中燃料材料区域和氧化剂材料区域放置在可燃元件的层中的适当位置。 例如,可以使用不同的挤出机来挤出和沉积燃料丝和氧化剂丝的部分在可燃元件的每层中的不同位置。 可燃元件可以在元件内限定燃烧室,其中当可燃元件被点燃时发生燃烧。 可以选择燃料材料和氧化剂材料,并且可以控制它们的相对量,使得燃烧所需的相对量的燃料和氧化剂存在于具有所需特性如燃烧速率的燃烧中。
    • 8. 发明申请
    • PROPELLANT GRAIN CAPABLE OF GENERATING BUFFERED BOUNDARY LAYER FOR REDUCING ROCKET NOZZLE RECESSION
    • 粉末块可能会生成缓冲层以减少强化纤维的强化
    • WO00049282A2
    • 2000-08-24
    • PCT/US2000/003781
    • 2000-02-15
    • F02K9/12F02K9/26F02K9/28F02K9/62
    • F02K9/26F02K9/12F02K9/28F02K9/62
    • This rocket motor propellant grain is designed to reduce recession of at least the converging portion of a converging/diverging rocket motor nozzle. The propellant grain has an oxidizer-deficient grain portion constructed and arranged in relation to the nozzle to create, upon ignition of the propellant, a boundary layer of oxygen-deficient combustion products that flows through the nozzle throat passage and over an internal surface region of the nozzle. The boundary layer functions to at least substantially isolate the internal surface region of the nozzle from oxidizers contained in the combustion products generated from portions of the propellant grain having higher concentrations of oxygen than the oxidizer-deficient grain portion. As a result, the oxygen-rich portions of the propellant are unable to react with and thereby cause recession of the nozzle internal surface.
    • 火箭发动机粉末块被设置用于减小至少会聚/发散火箭发动机喷嘴的会聚部分的凹陷。 该粉末块包含相对于喷嘴设计和布置的氧化剂不足部分,以便在粉末点燃期间产生氧气流通过喉部的缺乏燃烧产物的极限层 喷嘴的内表面区域上。 该边界层至少基本上用于将风口的内表面区域与燃烧产物中所含的氧化剂隔离,该燃烧产物由具有比所述氧化剂不足粉末块的部分高的氧浓度的粉末块的部分产生。 结果,粉末块的富氧部分不能与喷嘴的内表面反应,因此不能引起该表面的凹陷。