SU720289A1 - Device for automatically measuring the phase position of disbalance - Google Patents

Description

one

The invention relates to the optimization of the operating modes of vibration and shock-vibration machines, with unbalance or crank-drive (eccentric) exciters of vibrations, intended for compacting soils and other materials, driving piles, forming products from concrete mixtures, etc.

A device is known for automatically adjusting the operation mode of a mother's vibration and shock-vibration action by maintaining an unbalance at the moment of impact in the vicinity of a strictly defined for a given machine value 1.

However, this device contains electrocontact position sensors and has low reliability.

The closest in technical essence to the proposed is a device for automatically measuring the phase position of the unbalance, comprising two pulse sensors and a displacement sensor, two logic elements, two triggers, two inhibit logic elements, turn-on and reverse blocks, output relays and an executive motor. Moreover, the displacement sensor is connected to the first

inputs, two logical elements And a reverse unit and two logical elements of the inhibitor of the switch-on unit, to the second inputs of which, through the driver, the output of the first pulse sensor is connected. The outputs of the inhibit elements are connected to the trigger inputs of the control of the output relay of the actuator. The outputs of the two pulse sensors are connected to the trigger inputs, the outputs of which are connected to the second inputs of the two elements I. The outputs ele1, 1ent I and are connected to the inputs of the trigger controlling the operation of the reverse motor relay 2.

However, in this device, with the help of sensors and logic elements, only the sign of the deviation of the unbalance position at the moment of impact from a predetermined value is determined and a command is generated to turn on the system for controlling the phase position, unbalance. The numerical value of the phase position of the unbalance (crank) relative to the force applied by the working body at the moments of force on the material being processed cannot be determined using the device. The device cannot be used to determine the phase position of the unbalances or cranks, as well as their phase shift, in machines whose vibration exciters are made of two unbalances shifted in phase by a certain angle or balance points operating in the mode of two power (shock) effects. The shock part of the limiter for one revolution of the shaft. The purpose of the invention is to measure and indicate the phase position of AND; a phase shift of each unbalance; moments of machine impact on the material being processed. : This is achieved by the fact that the proposed device is equipped with a third and a single pulse sensor, rem key elements, soldering and reversing counters with display units associated with unbalance, information disk and applied along the perimeter at equal angular distances from each other the main marks and the additional pinned between the main MeTKaNM Dv1a pulse sensors are set to an angular distance equal to the distance between the main marks, and the third pulse sensor is installed from the second pulse date Linda, at an angular distance equal to the distance between the basic and additional marks. The second and third pulse sensors are connected to the inputs of the second element I, the output of which is connected to the inputs of the installation O of the summing and reversing counters, as well as the input of the installation of the first and second trigger. The first and second pulse sensors are connected to the inputs of the first element I, the output of which is connected to the information inputs of the first and second key elements. The outputs of the key elements are connected respectively to the counting inputs of the first and second summing counters and the summing and subtracting inputs of the reversing meter. The inputs of the display units are connected to the outputs of two summing and reversing counters, the displacement sensor is connected to the input of installation 9 of the first trigger and to the information input of the third key element, the output of which is connected to the input of installation of the second trigger. The direct output of the first trigger is connected with the control input of the first key element, and the inverse output with the control input of the third key element, the direct output of the second trigger connected to the control input of the second key element. The drawing shows the functions: on the device diagram. The device consists of an information disk 1 with deposited1 and on it with threads 2 (for example, ferromagnetic), pistons-impactors 3,4, displacement sensor 5, work 6, impulse sensors 7-9, logic elements 10 and 11, key elements 12- 14, the trigger 15,16, blocks 17-19 display, summing counters 20, 21, reversible counter 22 and unbalance or crank shaft 23. The device operates as follows. As the axis of the crank mechanism passes through the origin, signals are simultaneously induced in the three pulse sensors 7-9. At the output of element 11, a signal is formed that zeroes the counters 20-22 and E state i triggers 15 and 16. When flip triggers at their outputs, signals are generated that allow the pulse sequence to pass through the key elements 12, 13. When the disk is rotated through an angle h equal to the angular distance between the marks, the pulses coming at the output of the sensors 8.9 are simultaneously displayed. at the input of the element 10, at the output of which pulses are formed, passing through the key elements 12, 13 and arriving at the counting inputs of the summing counters 20, 21, as well as at the inputs of the reversible counter 22. When struck by the first piston. .the output of the displacement sensor 5 is formed by a pulse moving the trigger 15, forming at its direct output a signal O inhibiting the passage of pulses through the key element I 12, and at the inverse output a signal allowing the signal to pass through the element 14. In the counter 20 The rotation angle of the first crank between the origin and the impact of the piston 4 on shaft 6. As the disc 1 turns further, the pulses continue to accumulate only in counters 21 and 22. When the second piston 3 strikes on shaft 6, a pulse is generated at the output of displacement sensor 5 through the element 14 and the flip-flop trigger 16, forming a signal O on the direct output, prohibiting the passage of pulses through the element 13. In the counter 21, a number proportional to the angle of rotation of the second crank between the origin and the pore n Chabauty 3 to 6. The down counter 22 is fixed number equal to the difference in the counters 20, 21, proprrtsionalnoe angle oc - phase shift between the first and second crank of the crank mechanism. In this case, the measurement cycle ends. On the display blocks 17, 18, 19, the values accumulated in the counts 20-22 are induced. With the passage of the information disc 1 of the origin position, the counters 20, 21, 22 are reset to zero, the triggers 15, 16, etc. are reset

In addition to providing visual observation of the monitored values, the information accumulated in counters 20, 21, 22 can be fed into the logic block of the controller of the automatic control system of the shock-vibration machine operation in order to ensure the formation of a regulating effect on the control object proportional to the deviation of the controlled variables from the given value.

Claims (2)

1. Authors certificate of the USSR, cl. G 01 B 11/26, E 02 D 7/26, 1967. 2. USSR author's certificate number 189475, cl. G 05 D 19/02, G 05 13/02, 1966 (prototype).