RU1828771C - Pneumatic vibration exciter - Google Patents

Abstract

SUMMARY OF THE INVENTION: the control system comprises a four-input comparison element with two positive and two negative cameras, the output of which is connected to the input of the pneumatic actuator. The output of the trigger pneumatic tumbler is connected to the first positive chamber. The rod intermediate position sensor is made in the form of a pneumatic nozzle. A friction plunger and a sensor for the upper and lower positions of the plunger are mounted on the rod. The outputs of the sensors are connected respectively to the second positive and first negative cameras. The output of the intermediate stem position sensor is connected to a second negative chamber. 2 ill.

Description

The invention relates to vibration technology and can be used in various industries, for example, vibratory feeders, hopper devices, etc.

The purpose of the invention is to increase stability and expand the frequency range of vibration exciters.

The proposed design of the device allows you to expand the frequency range and increase the stability of the device by clearly turning on the pressure pulse in almost the lower position of the rod and accurately turning it off in a predetermined intermediate position.

Figure 1 presents a structural diagram of the device: figure 2 is the same, section aa.

The device contains a one-way diaphragm actuator 1 with a power rod 2 and a control rod 3, on which the bracket 4 is mounted. A friction plunger 5 is mounted on the bracket, pressed against the guide rails by a spring 6, mounted on the bracket with screw 7. Friction plunger travel is about 0 , 1 mm, The friction plunger interacts with its ends with the sensors 8, 9 of its upper and lower positions, the outputs of which are connected respectively to the second plus and first negative cameras of the comparison element 10. The first positive camera is ele The reference device is connected to the start pneumatic toggle switch 11, and the output of the comparison element is connected to the working chamber of the drive 1. A copier 12 is mounted on the bracket 4, which interacts with the intermediate position sensor 13, the output of which is connected to the second negative camera of the comparison element. The power rod 2 is connected to the apparatus 15 mounted on the springs 14, to which oscillations must be reported. Each of the sensors 8, 9, 13 contains a read nozzle connected

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Yo

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through a choke with a power source, and an output channel.

The approximate level of the output signals is logical 0 and logical G, respectively: for sensors 8, 9 - 0.04 MPa and 0.08 MPa, for sensor 13 - 0.01 MPa and 0.08 MPa, for pneumatic toggle switch - O and 0, 14 MPa.

The device operates as follows.

In the initial position, the pneumatic tumbler is turned on, as a result of which the apparatus 15 is in the upper extreme position, while the nozzle of the sensor 13 is blocked by a copier 12 (logical signal 1 at the output of the sensor). the friction plunger is pressed to the nozzle of the sensor 8 (at the output of the sensor, logic signal 1, at the output of the sensor 9, logic signal 0). Since the algebraic sum of the signals in the chambers of the comparison element is positive, the membrane block of the comparison element is in the lower position, and the pressure from the power source passes through the output of the comparison element to the working chamber of the pneumatic actuator.

To start the device, the toggle switch 11 is turned off (the algebraic sum of the signals in the chambers of the comparison element becomes negative), as a result of which the membrane unit of the comparison element moves up, the output of the comparison element and the working cavity of the pneumatic actuator communicate with the atmosphere, and the apparatus 1S is forced the gravity and springs 14 begin to move down. At the beginning of the diving of the apparatus 15 downward, the Friction plunger 5 moves away from the nozzle of the sensor B and is pressed against the nozzle of the sensor 9 (logic 0 at the output of sensor 8, logic 1 at the output of sensor 9). Upon further downward movement in a predetermined intermediate position of the apparatus 15, the copier 12 opens the nozzle of the sensor 13 (logical 0 at the output of the sensor 13). The apparatus continues to move down to the lower end position. When the apparatus 15 is moved from the upper to the lower position, the value of the algebraic sum of the signals in the chambers of the comparison element remains Negative, therefore, the membrane unit of the comparison element is in the upper position and the working cavity of the drive is in communication with the atmosphere.

After reaching the lower extreme position, the apparatus 15 under the action of the spring springs 14 begins to move upward, while the friction plunger 5 moves away

from the nozzle of the sensor 9 and is pressed to the nozzle of the sensor 6 (at the output of the sensor 8 - logical 1, at the output of AatsnKa 9 - logical 0). The algebraic sum of the signals in the chambers of the comparison element becomes positive, therefore, the membrane unit of the comparison element moves down and the pressure from the output of the comparison element enters the working chamber of the pneumatic actuator, moving the device up. When moving upward in a predetermined intermediate position, the copier 12 blocks the nozzle of the sensor 13 (logical 1 at the output of the sensor 13), while the algebraic sum of the signals in the chambers of the comparison element becomes negative and therefore the membrane unit of the comparison element moves upward and the working cavity of the drive communicates with the atmosphere. The inertia apparatus 15 continues to move to its highest position, then its lowering begins and the cycle repeats.

Thus, in the steady state, the technological apparatus installed on the springs, under the influence of the vibration exciter, makes forced oscillations at the natural frequency of the system, the system includes the apparatus mounted on the springs and the vibration exciter), which allows to significantly reduce energy consumption and, at the same time, change the mass oscillation frequency judge her change. The proposed device allows more efficient use of the advantages of implementing the operating mode at its own frequency, providing more stable operation in an extended frequency range.

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Claims (1)

SUMMARY OF THE INVENTION A stump is a magical vibratory actuator containing a one-way translational pneumatic cylinder with a rod and a control system including a four-way element for comparing with two plus and two minus chambers, the output of which is connected to the pneumatic actuator inlet, a trigger pneumatic toggle, the output of which is connected to the first positive a comparison element and a rod intermediate position sensor, made for example in the form of a pneumatic nozzle, characterized in that, in order to increase the stability of To expand the frequency range, it is equipped with a friction plunger mounted on the rod and a plunger upper and lower position sensor, the outputs of the sensors are connected respectively to the second plus and first negative cameras of the comparison element, and the output of the intermediate position sensor of the rod is connected to the second negative camera of the element comparing. eleven fig i fig i AM