Brake trains

When moving train at a scheduled stop or to place speed limits appropriate to begin the first stage of braking, relieving highway at 0,4-0,5 kg/cm2 in passenger trains (with the composition of more than 20 cars from skorodeystvuyuschimi triple valves - on 0,7 -0.8 kgf/cm2), the cargo loaded trains - at 0,6-0,7 kgf/cm2 on very long, steep descents and length of over 350 axles - to 0,7 - 0,8 kgf/cm2, and empty freight trains - to 0,3 - 0,5 kgf/cm2.

When electropneumatic brake the first step performed with the pressure in the brake cylinders 0,8 - 1,5 kgf/cm2. Lowering the rate of 25-50% of the primary, if necessary, increase the inhibition by increasing the relaxation of the brake line of the cargo loaded on trains 0,4-0,5 kg/cm2, a passenger - 0,3 - 0,5 kgf/cm2.

In the process of motion in the first stage of inhibition is cleaning the rolling surface of wheels, its heating and heating of brake pads, which improves the adhesion of the wheels and rails, and a more sustainable process of deceleration, increases the smoothness of braking.

The cargo train loaded in the speed range 90-70 km / h average deceleration during the first stage of inhibition at the site can take 0.1 m/s2, and the speed of 70 km / h to stop when braking stage 1,0 kgf/cm2 - 0 2 m/s2. Substituting these values into the formula, we obtain the loss of time for a two-step inhibition compared with single-stage large step: = 3.1 s, ie, the time difference is negligible.

Traffic light with a yellow warning lamp, as a rule, a signal to reduce speed, and speed of its prosledovaniya must not exceed. If the cargo loaded train is going at a speed of 90 km / h, with the appearance of the locomotive at the traffic light yellow light automatic brakes should trigger the discharge line at 0,9-1,0 kg/cm2, and in an empty train - the reduction of pressure on the 0,5 -0.7 kgf/cm2.

Subtopics:

• Deep Relaxation