News
The density of carbon carbon composite material can be adjust between 1.3~2.0g/m3,and it can be widely used for any parts of the nozzle. According to the different ablation environment,the middle and high density carbon carbon composite material can be used for the throat part,the low density C/C composite material can be used for the back expansion part and the middle and low density material can be used for the front expansion part and the head. In addition,the screw,pin which are also made from the carbon carbon composite material can be used in the nozzle,and the function is connection. The carbon carbon composite material nozzle and expansion part was widely used in the SRM since 1990s, multilevel SRM, strategic missile SRM,rocket…
As the high tempterature and complexity of the throat environment and the polytrope during the ablation process,the carbon carbon composite material throat also show a complex process,and there are many effects of different degrees from the carbon fiber micro complexity,different technology etc. The type and quality of the carbon fiber has a big influence to the strength and ablation properties of the carbon carbon composite material. There are many different carbon fiber,like PAN base carbon fiber,pitch base carbon fiber,and rayon base carbon fiber,and each kind of the carbon fiber can be divided into many series. The carbon carbon composite material is mainly desined according to the purpose and working environment,the main properties include strength, modulus,thermal property etc. Generally speaking,the high…
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…
