SU1695962A1 - Controlled vibrator - Google Patents

Abstract

The invention relates to a vibration technique and can be used as a drive for a working member of a vibration machine for various purposes. The purpose of the invention is the expansion of operational capabilities by automating the control of the vibration exciter. The change in the amount of imbalance introduced by the movable unbalance is carried out by turning it around the axis of rotation, carried out when it is moved along the drive shaft due to the movement of the keys fixed on it along the screw grooves of the drive shaft. Moving the rolling unbalance along the drive shaft is carried out by a screw-cylindrical gear motor by means of a screw interacting with a slide mounted on the movable unbalance through the bearing. The control system, made in the form of a master unit, a movable unbalance position sensor, two amplitude sensors and a control unit, provides a predetermined amplitude of oscillations by adjusting the position of the movable unbalance and a given level of imbalance, as well as loading the working body of the vibrating machine. 3 il. C / 1 C

Description

The invention relates to a vibration technique and can be used as a drive for a working member of a vibration machine for various purposes.

The purpose of the invention is to enhance operational capabilities by automating the control.

Figure 1 shows the exciter and block diagram of a remote control system; Fig. 2 is a schematic diagram of the implementation of helical grooves on the drive shaft; in Fig. 3, details of the connection of the rolling unbalance with the unbalance shaft and the slide.

The vibration exciter comprises a housing 1, a drive shaft 2 mounted therein in bearings, interacting with an electric actuator 3, a fixed 4 and a movable 5 unbalances placed on it, a debalance adjustment mechanism in the form of keys 6 placed in the helical grooves 7 of the drive shaft 2 and with the movable unbalance 5 of the additional bearing 8, the inner race of which is connected with the movable debalance 5, the position sensor 9, the slide 10, one end of which is connected with the outer race

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dog dog 8, and the other with the sensor 9 position and placed in a longitudinal section of the housing, the actuator 11 mounted on the housing, and the screw 12 connecting the actuator 11 with a slider 10, the scale 13 of the sensor 9 position fixed on the housing 1 and the control system two amplitude sensors 14 installed on housing 1, conversion unit 15 to which amplitude sensors 14 and position sensor 9 are connected, driver unit 16, the output of which is connected to conversion unit 15, control unit 17, whose input is connected to conversion unit 15, and you ode electric indicator and actuator 18 connected to the control unit 17 and the driver unit 16. The control unit 17 has an output intended for connecting the manipulator load working body vibration machines.

The controlled vibration exciter operates as follows.

Before starting the electric drive 3, the debalances 4 and 5 are in diametrically opposite positions and their total static moment relative to the axis of the drive shaft 2 is close to zero. From the master unit 16, the maximum unbalance Sp and the amplitude of oscillations Ap of the vibration exciter fixed to the working element of the vibrating machine and the time of its operation in the predetermined mode are entered into the control unit 17 through the converting device 15. The control unit 17 generates a signal for the start of the electric drive 3.

After acceleration of the exciter from block 17, a signal is sent to start the drive 11, which starts to rotate screw 12. Rotating, screw 12 moves along the drive shaft 2 the slider 10 and the movable unbalance associated with it through an additional bearing 8. Moving along the drive shaft 2, the movable unbalance 5 is rotated relative to it due to the movement of the keys 6 along the helical grooves 7. This increases the amount of unbalance S and the amplitude of oscillations a. Signals about the amplitude of oscillations of the body of the controlled vibration exciter and the worker

Vibratory machine organ with amplitude sensors 14 through conversion unit 15 is fed to control unit 17. The latter defines the half-sum of these signals.

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a & -b-- compares hell and

ar, and a signal is given to the drive 11 to stop if ad ar, to increase S, if ad ar or to decrease S, if ad ar.

At the same time, the set value Sp is compared with its actual value S, information about which is supplied to the control unit 17 from the position sensor 9.

If S SP, the command from control block 17 switches on the manipulator to load the working element of the vibrating machine. The amplitude of oscillation of the working member is reduced (ad ar) and a command is issued for

the actuator 11 for increasing S. At 5 Sp the manipulator is switched on to reduce the load of the working element of the vibratory machine.

Claims (1)

Invention Formula A controlled vibration exciter, comprising a housing, a drive shaft with helical grooves mounted therein in bearings, an electric drive associated with it, a fixed and movable unbalance located in the housing, the latter kinematically connected with helical grooves, and an additional bearing whose inner race is connected to a movable unbalance, characterized in that, in order to expand operational capabilities, it is equipped with a moving unbalance position sensor, kinematically connected with the last drive, the master m, two amplitude sensors mounted on the housing, a conversion unit connected to the amplitude sensors and a moving debass position sensor, a control unit, the input of which is connected to the conversion unit, and output with the electric drive and drive, and an indicator connected to the control unit and setting by block. ////////////////////, C 14 14 Fm.1 T POLO & IN STEP 0IKG- L, .one KANAVKI b 6 Pup