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

In the railway transport, brake is very important for the safe of vehicle. Vehicle brake is depend on the source of impressed air. In the atmosphere normal air press, for the difference of compressed air press and out air press establish some experiment standard of distributing valve and using in the distributing valve examine. But there are some difference in experiment of tableland air pressure, This is only in the world history. Establish the useful new experiment standard of distributing valve in the tableland air pressure have the realistic meaning. If we do not, this will intimidate and hidden trouble for the safe of railway transport and manufacture.Based on the atmosphere flowing theory, with the computer simulation model of Chinese 120 vehicle distributing valve and its test rig, analysis and forecast the influence of atmosphere pressure to experiment performance of single valve. Based on the three years single valve testing data of certain vehicle depot. Example of local decompression room exhausting air time of braking and releasing of brake delicacy degree experiment, brake cylinder charging time of releasing of brake delicacy degree and release of brake valve flux experiment. Forecast the influence of atmosphere pressure to single valve experiment performance. The result turn out according to present single valve experiment method and standard, the part of eligible valve on the spot will not eligible on tableland experiment, also, the part of eligible valve on tableland will not eligible on the spot experiment. The job will offer the method for future tableland single valve experiment standard research. For the future research of valve experiment method and standard offer a few commonplace remarks by way ofintroduction so that others may come up with valuable opinions.This article make out, the distributing valve experiment index will vary with the change of air pressure. If the standard and method do not change, the experiment result of tableland and atmosphere air pressure will different, this will produce problem. So, develop the system research for the single distributing vale experiment method and standard will safeguard for the tableland railway.