摘要:
An electromechanical actuator comprising an electric motor (11) for driving an output shaft (4) in rotation via a reduction gear (20) and passive regulation stage (30) allowing for control of the speed of rotation of the output shaft. A braking member is arranged between an output of the reduction gear and the output shaft to be driven, the braking member being arranged to ensure two different braking levels depending on the direction of rotation of the shaft. The braking member is of hydraulic type and comprises a paddle (33) for transferring fluid between two chambers (34, 35) under the effect of the rotation of the output shaft, transferred fluid passing through a selective drawing member (41) which, depending on the direction of rotation of the actuator, opposes two distinct resistances to the decantation of the fluid from one chamber to the other.
摘要:
A method of operating an aircraft landing gear between a deployed position and a retracted position. The landing gear comprises a leg hinged to the aircraft, the leg being stabilized in the deployed position by a folding strut comprising two hinged-together links, the strut being held in an aligned position by a stabilizer member comprising two hinged-together links themselves held in alignment by a locking member. The method comprises the steps of arranging the strut (2; 102) and the stabilizer member (4; 104) in such a manner that at least one of the links (4a; 104a) of the stabilizer member moves continuously during a movement of the leg from the deployed position to the retracted position, and of attaching an operating actuator (10; 110) to the link in order to cause the link to pivot against the locking member and to exert thereon a force tending to move the leg.
摘要:
The invention relates to textile fibers at least partially covered with a nanometric-sized semiconducting material having photocatalytic properties for degrading chemical compounds, in particular chemical or biological agents, wherein said semiconducting material is in the form of nanostructure or nanocomposites with a one-dimensional morphology. The textile fibers can be used for application in the military, medical, and civilian domains, etc. The curves 60 and 62 respectively show the photocatalytic degradation of organic compounds at the surface of textile fibers covered with nanostructures or nanocomposites having a one-dimensional morphology according to the invention, and nanoparticles having a granular morphology according to the prior art. The nanostructures are nanocomposites of the invention 60 are more efficient.
摘要:
The invention relates to a chemical reactor with a nanometric superstructure, comprising at least one member wherein at least one reaction chamber is arranged, and said reaction chamber being filled at least partially with a high specific surface area material having a specific surface area greater than 5 m2/g, and characterised in that said high specific surface area material is selected from nanotubes or nanofibres.These nanotubes or nanofibres are preferably selected in the group consisting of carbon nanofibres or nanotubes, β-SiC nanofibres or nanotubes, TiO2 nanofibres or nanotubes.They may be deposited on an intermediate structure selected in the group consisting of glass fibres, carbon fibres, SiC foams, carbon foams, alveolar β-SiC foams, said intermediate structure filling the reaction chamber of said reactor at least partially.
摘要翻译:本发明涉及一种具有纳米超结构的化学反应器,其包括至少一个构件,其中至少一个反应室被布置,并且所述反应室至少部分地填充有比表面积大于5的高比表面积材料 m 2 / g,其特征在于所述高比表面积材料选自纳米管或纳米纤维。 这些纳米管或纳米纤维优选选自碳纳米纤维或纳米管,-SiC纳米纤维或纳米管,TiO 2纳米纤维或纳米管。 它们可以沉积在由玻璃纤维,碳纤维,SiC泡沫,碳泡沫,泡沫和碳纤维-SiC泡沫组成的组中选择的中间结构上,所述中间结构至少部分地填充所述反应器的反应室。
摘要:
The invention relates to textile fibers at least partially covered with a nanometric-sized semiconducting material having photocatalytic properties for degrading chemical compounds, in particular chemical or biological agents, wherein said semiconducting material is in the form of nanostructure or nanocomposites with a one-dimensional morphology. The textile fibers can be used for application in the military, medical, and civilian domains, etc. The curves 60 and 62 respectively show the photocatalytic degradation of organic compounds at the surface of textile fibers covered with nanostructures or nanocomposites having a one-dimensional morphology according to the invention, and nanoparticles having a granular morphology according to the prior art. The nanostructures are nanocomposites of the invention 60 are more efficient.
摘要:
The invention relates to a photocatalyst comprising a β-SiC cellular foam and a photocatalytically active phase, deposited directly on said cellular foam or on an intermediate phase deposited on said cellular foam. The average size of the cells is between 2500 μm and 5000 μm. The foam can comprise nanotubes or nanofibers (particularly of carbon, SiC, and TiO2) that consist of, or carry as an intermediate phase, a photocatalytically active phase.
摘要:
A process for catalytically oxidizing H2S contained in a gas directly to sulphur containing the following steps: combining the H2S-containing gas with a gas containing free oxygen in an amount to produce an oxygen-enriched H2S-containing gas having O2/H2S molar ratio ranging from about 0.05 to about 15; and contacting the oxygen-enriched H2S-containing gas with a catalyst for selective oxidation of H2S to sulphur, wherein the catalyst includes a catalytically active phase combined with a silicon carbide-based support and wherein the active phase of the catalyst consists of at least one oxysulphide of at least one metal selected from the group consisting of iron, copper, nickel, cobalt, chromium, molybdenum and tungsten, at a temperature above the dew point of sulphur formed during H2S oxidation.
摘要:
An artificial retina that includes: (i) a substrate; (ii) a first layer, placed onto said substrate and including photovoltaic material portions separated by at least one insulating material portion; and (iii) a second layer, placed onto said first layer and including conductive material portions separated by at least one insulating material portion. In said artificial retina, the photovoltaic material includes a titanium dioxide semiconductor.
摘要:
An artificial retina that includes: (i) a substrate; (ii) a first layer, placed onto said substrate and including photovoltaic material portions separated by at least one insulating material portion; and (iii) a second layer, placed onto said first layer and including conductive material portions separated by at least one insulating material portion. In said artificial retina, the photovoltaic material includes a titanium dioxide semiconductor.
摘要:
The present invention relates to catalytic compositions for, inter alia, the photocatalytic oxidation of CO, including: a substrate including, at least at a surface thereof, titanium oxide; and, deposited on the titanium oxide on the surface of the substrate, a metal mixture containing: platinum, at least partially in the metal state; and palladium and/or nickel, at least partially in the metal state. More specifically, the invention relates to the use of said compositions for treating gaseous media including CO and organic pollutants, for example indoor air in inhabited buildings or vehicles.