SU770886A1 - Method of emergency braking of mine train - Google Patents

Description

(54) METHOD OF EMERGENCY BRAKING OF THE MEMBER STRUCTURE The invention relates to railway transport. There is a known method of deceleration of a rolling stock in which the brake is turned on by pulses, the duty cycle of which is established by the braking controller. The disadvantage of this method is the need to manually set the duty ratio of the braking pulses, as a result, the effectiveness of the brake depends on the qualification and correctness of the driver's actions. There is also known a method of emergency braking of the mine composition, which consists in pre-assembling the compound under reduced braking force with fixing the moments of collisions of adjacent trolleys and final braking of the last ship by applying full braking force. The disadvantage of this process is the adjustment of the constant braking force without taking into account the loading level of the trolleys to changing the path, which in some conditions reduces the intensity of the pre-braking and in others causes significant dynamic forces along the train. The disadvantage of the method is also a constant time delay from the last collision of the trolleys to the activation of the final full braking. The purpose of the invention. - reducing stopping distance and reducing dynamic forces. For this, according to the proposed method, the magnitude of the reduced braking force is formed by alternating a full and a small braking force, while a small braking force is applied during the fixation of each collision, and a full braking force between the collisions. FIG. 1 is a diagram illustrating the proposed method; in fig. 2 A device for carrying spos, o6a. At the time of receiving a command, full braking force Vr is applied to the emergency braking. and the composition begins to collect. At the moment t, receiving the signal from the collision sensor, which means that the first trolley hits the locomotive, a small braking force B is applied.

This force can be chosen less than a reduced force, according to a known method (see Fig. 1, shown as a dotted line), which will allow (KNG a push and thus reduce the danger of the truck coming off. After the h signal of the impact has been stopped at time t, the full braking force is applied again to the start of the second impact at time t, then again including a small braking force, and so on, until the next application of a solid braking force at time .tp. will cause collisions in the train, which means automatic transition to the windows atelnomu braking with full braking force.

FIG. 2 shows a block diagram of an apparatus for carrying out the method. The device consists of a shock sensor 1, connected to the input S of the sensor and RS RS-trigger 3 input logic circuit 2 implements the function AND-NOT. The second input X of circuit 2 is connected to the voltage source UQ, and the output is connected to the input g of trigger 3. The trigger outputs U YI are connected via normally open contacts 1TP and 2TR of the emergency braking relay to actuators 4 and 5, respectively, of small and full braking forces . The device works in the following way.

In the initial state, the trigger 3 is in a steady state with a voltage at the output Y, since its input r is given a signal from logic circuit 2. When an emergency braking command is given, the 1TP and 2TP contacts are closed, and the voltage from the output Y, 2 flip-flops 3 through the contacts 2TP is applied to the actuator 5 of the full braking force. The moment when the impact sensor 1 starts to strike a signal to the input S of the flip-flop 3 and to the input X of the AND-NOT 2 circuit, to the other input X 2 of which a constant voltage is applied Up. At the same time, at the input of circuit 2, the voltage becomes equal to zero, and the trigger goes to another steady state, issuing a command from output Y to the actuating element 4 of the small braking

effort bfj ,,

After the termination of the signal from the impact sensor 1, the voltage at the input S of the trigger 3 disappears and simultaneously appears at its input, the transfer of the trigger to the initial position of the command from the output Y to

actuator 5 full braking force. the trigger goes to the same position and at the moment of the end of the last push, it decelerated with full braking

effort.

 When applying the method, a reduction in stopping distance is achieved, i.e. the economic effect can be obtained by increasing the calculated

train weights.

Claims (2)

Invention Formula The method of emergency braking of the mine composition, concluded in the preliminary assembly of the compound with reduced braking force from fixing, days of collisions of adjacent trolleys and final braking after the last collision by applying full braking force, characterized in that, in order to reduce the braking distance and reduce dynamic effort The magnitude of the reduced braking force is formed by alternating the full and small braking forces, while a small braking force is applied during the period of fixation of each impact, and the full braking force is applied between the collisions. Information sources, . accepted. attention in the examination 1. The author's certificate of the USSR 473627, cl. B 60 T 13/66, 1970. .. 2. Authors certificate of USSR 455879 cl. B 60 T 8/12, 1972 {prototype), 8f,