SU765047A1 - Apparatus for antislipping protection of diesel locomotive - Google Patents

Description

I

The invention relates to railway transport, in particular, to devices for protecting mainline locomotives from the batching of wheel pairs. g

A device for protection against blocking of wheel pairs of a locomotive is known. containing frequency sensors for the rotation of wheel pairs and a clock pulse generator connected via switches to counters whose outputs are connected via an AND gate to an actuator, a reset generator, a delay line, an additional switch Ts. j

The disadvantage of this device lies in the fact that, at the same time (R4 boxing of all the wheel sets of the locomotive, its sensitivity is less than 10) ./ 20

The purpose of the invention is povuavie chuv. stability at all wheelsets of the locomotive.

This goal is achieved by the fact that the device is supplied with a control to the 25 trigger using its outputs to control inputs of the switches, and an input to the clock generator through the Polo generator and the delay line.

the output of the reset generator is connected via an additional switch to the installation inputs of counters made reversible, with each switch being connected to two counters by opposite counting inputs and logic elements OR, according to the number of rotational speed sensors, connected by their outputs to the logic element I, and the inputs to reversible counters.

The drawing shows the functional scheme of the device.

The device contains frequency sensors 1 of rotational speed of wheel pairs and a generator of 2 clock pulses connected via switches 3 to reversible counters 4. Control trigger 5 with its outputs is connected to control inputs of switches 3 and an additional switch 6, and input to generator 2 clock pulses through the generator 7 reset and line 8 delay. The output of the reset generator 7 is connected via an additional switch 6 to the installation inputs of the reversible counters 4. The logic elements OR 9 are connected by their inputs to the reversing counters 4, and the outputs through the logic element AND 10 to the actuator including the time relay 11, the amplifier 12 and the control unit 13 excitation of the generator. The device works as follows. The clock pulse generator 2 generates pulses with a duty cycle close to one, and also forms a time interval during which the reversible counters are filled with 4 pulses of the frequency sensor 1. When the clock pulse disappears, the clock generator 2 blocks the working inputs of the switches 3 and turns on the generator 7 reset. Depending on the state of the control trigger 5, the reset generator 7, which is a one-vibrator type short pulse shaper, installs through the additional switch b reversible counters 4 into the zero state after each clock pulse (measurement cycle Reversible counters 4 are made in the form of double-sided counters they are intended for continuous time monitoring of the rotation frequencies of sensors 1. In the initial state, the reversible counters 4 are reset to zero, the control trigger 5 is found TC in arbitrary state. The locomotive moves without blocking. If the control trigger is in the zero state, then in this case the first clock pulse from the generator output 2 clock pulses opens the working inputs of the switch 3 and the signals of the frequency sensors 1 arrive at the summation inputs of the same and subtractive inputs of: other reversible counters 4. Consider two successive time intervals with the i-th and j-oro clock pulses being defined, respectively. Since clock durations with const, then with tj Determine the number of pulses arriving at the counting inputs of reversible counters 4, with a zero state of the control trigger 5 in the J-OM measurement cycle, we have NIJ fKJCH (K 1, ... .6), (-NIJ) where N,, are the capacities of the reversible counters 4 in the j-th measurement cycle; frequency of pulses of frequency sensor in J-OM measurement cycle Since in the 1st measurement cycle and summation of the inputs of the reversible counters 4 received K1 and pulses, the difference A N j of the added and subtracted pulses of the k-oro countdown counter 4 along the expiration of time Jn with regard to (1) and (2) is determined by the formula; j H u-i j u uiiKr.i) (kH; ...), where f is the pulse frequency of the k-oro frequency sensor in the 1st measurement cycle; WKJ is the acceleration of the kth wheelset in the measurement cycle. In the formula (3), the value of Hyc is either zero when the locomotive is moving at a constant speed, or it is a small value when the locomotive is accelerated. After passing through the j-th clock pulse, a reset generator 7 is turned on, which sets up reversible counters 4, in which the information is recorded, to its initial state via an additional switch b, and also, after a time interval defined by delay line 8, flips control trigger 5 in a single state. This is followed by a similar measurement cycle, in which the pulses from frequency sensors 1 through the switches 3 are fed through other counting inputs of reversible counters 4. The value 4 N (; j -Wj,; represents the difference between the added and subtracted pulses of the second k-oro reversing 4. In the considered case, there is no control action from the higher bits and the trigger of the sign of the reversible counters 4 on the control unit of the excitation of the traction generator At blocking in the J-OM cycle, up to five wheel pairs are at least Here, one wheel pair retains the clutch. Consequently, the operation of the device in this case is similar to the work of wheel pairs without boxing. If all wheel sets are boxed in the J-OM measurement cycle, formula (3) remains in effect. cycle, they lose their grip and acceleration on the rolling circles of their wheels. The formula (3) implies that the values grow, (..., 6; f) and signals from the higher bits and the trigger appear. the sign of the reverse counter 4, which through the logical elements OR 9 arrive at strokes of the logic element AND 10, the output of which includes a time relay 11 and a relay amplifier 12. The output of relay amplifier 12 breaks the excitation control circuit of the traction generator. Boxing wheel pairs at the same time begin to regain grip. Time relay 11, with a time lag, E of the total time for restoring the clutch of the wheel pairs, sends a signal to the relay amplifier 12, which includes the excitation control circuit of the traction generator.

Claims (1)

Invention Formula A device for protection against boxing of wheelsets of a locomotive, containing frequency sensors for rotational speed of wheelsets and a clock pulse generator, connected via switches to counters, whose outputs are connected via a logic element And to an actuator, a reset generator, a delay line, an additional switch, characterized in that, in order to increase the sensitivity while simultaneously blocking all the wheel pairs, it is provided with a control trigger connected by its outputs to the control inputs of the switches, and input to the J clock pulse generator through the reset generator and the delay line, while the output of the reset generator is connected via an additional switch to the installation inputs of the counters, made by reversible, and with each switch are connected two counters with opposite-named counting inputs, and logical elements OR by the number of rotational speed sensors, connected by their exits 5 with a logical element And, and inputs with reversible counters. Sources of information taken into account during the examination 0 USSR Author's Certificate No. 493994, cl. B 60 L 3/10, 11.05.72 (prototype) -.