News
Carbon brush is a device which conducts current between stationary wires and moving parts,most commonly in a rotating shaft. it's a sliding contact used to transmit electrical current from a static to a rotating part, in a motor or generator, and as regards DC machines, ensure a spark-free commutation. typical applications include electric motors, alternators and electric generators. Carbon brushes are maintained by brush-holders to be in permanent contact with the slip ring assembly or with the commutator. Carbon Brushes are used in general industrial such as DC motors, Electrical trains, Wind-generated power. industrial carbon brushes are used on large commutator machines, in which the current between the rotor and external circuit is periodically reversed. These include AC and DC…
The ablation property of the carbon carbon composite material is the key factor of SRM. The nozzle of the rocket or missile is under the situation of high speed air flow,and this kind of the material has the oxidization property,it will make the throat continuously in the ablation environment. The index of judging the material's erosion performance is mainly including: specific heat capacity,thermal conductivity,ablation rate,density etc. The good specific heat capacity can make the material absob much heat during the ablation process,and the low thermal conductivity can only make the high temperature gathered on the surface of the material,and can not transfer into the inside structure. The low density material can make the total weight lighter. The ablation property of…
Carbon carbon composite material is carbon fiber reinforced carbon composites, belong to the research and development in the field of high and new materials nomatter in China or abroad. In 1958,in the American Chance Vought Airlines Laboratory,the carbon carbon composite material was found by chance, during the testing of carbon fiber content in organic matrix composites,due to the mistake of the experimentation,the organic matrix Pyrolysised,and got the matrix carbon,and the new composite material has many good comprehensive performance,and after that,the C/C composite material was widely used for many high-tech fields. Carbon carbon composite material has the good high thermal resistance performance of carbon material, At the same time,it also has the good strength of the composite material,and it’s also easy…
