Density change brake freight trains in the network (user TST-TSV-TSNII/3969)


Time limits to check the density of the network for freight trains brake somewhat reduced in the light of compressed air consumption of nutritious network engine (with the previous rules is not taken into account). The new regulations reflect the closer the actual service conditions, are constructed on the basis of air flow leakage from each cargo for a four-car 20 L / min, which corresponds to the compressed air may leak a passenger car. In the previously existing standards for freight cars, this rate was only 15 l / min and was significantly lower than for passenger cars. Objectively, it does not fully correspond to the actual state and conditions of operation of trucks and passenger cars.

The previous regulations consistent with the leak, accompanied by a decrease in pressure of 0.2 kg/cm2 in 1 minute in the whole network of wagon brake having a volume of 75 l (with spare capacity of 55 l tanks). Comply with new regulations to reduce the pressure 0.2 kg/cm2 at 1 min of stopping the network capacity of 100 liters, ie, the freight car with a spare tank 78 liters. New regulations verified by test results in a length of 400 freight trains laden axles mode diffusers based operation of compressors (see response 1.1.12) and they meet modern international standards.

On established standards of operation allowed pressure drop to 1.5 kg/cm2 along the long train of the compound, and braking while recharging network - 15 minutes.

Ensure the density of the established standards will require specialists Rolling Stock serious efforts to eliminate leaks in freight trains. At the same time should be excluded cases where the driver is forced to go with trains, which exceed the standards of instruction leak.

Final check on the density of the network when the brake testing is usually performed with avtotormozov the train locomotive after him cavil to the composition. At the same time reducing the pressure in the main tank is usually somewhat underestimated due to incomplete charging network in the braking time of writing, especially in dlinnosostavnyh trains.