The Research Of 120 Distributing Valve Testing Standard On Tableland Low Atmosphere Pressure

In July 2006, qing-tabit railroad will be tried to use, because of the special of the environment in the qing-tabiet plateau region, it have already outrun existing and related technical specification and the scope of the standards to the request of the vehicle, so need to carry on the emendation to the related technical specification and standard.The vehicle compressed fluxion air is used to conduct the control signal source and brake, so in special environment of plateau the vehicle system brake performance may variety.existing brake valve standard is established by experiment in the air pressure of plain, but the air pressure of the plateau region and the air pressure of the plain are obviously different, we must refully analyze the the influence of plateau low atmospheric pressure to the brake valve function of experiment systematically, then the plateau train can circulate safely and Punctually.The same kind of valve has the different testing function, this article assumpts that the reason of different experiment function is mainly making difference ( such as the difference inner hole diameter of the valve) and the physical parameter difference (such as spring coil rigid deviation, installtion load difference) etc..The main influent factor of this article mean the change of the structure size or physical parameters within the scope of makeing difference, possible factors are found by the analyse of each single valve experiment according to the 120 valve structure analysis, by the computer imitate system of 120 valve on the wk-120 testing machine based on the air flow theorie ,the influent degree and regulation of every influent factor to the experiment and main influent factor are found .Collecting the testing data of 120 valves of north vehicle duan in Dalian within recent three years and statisticsing each experiment result of the function , some segments of the function paremater of 120 valve were divideaccording to the analysis need .by the single valve testing computer imitiate system ,changing the main influence factor and carrying on imitating the true calculation, the influent factor number to...