SU1715681A1 - Pneumatic vibratory drive - Google Patents

Abstract

The invention relates to drives for vibration transporting machines, and m. used in mining, construction and other industrial areas. The goal is to increase the frequency of vibrations. The pneumatic vibrodrive contains the working body 1 connected to the base 6 by the flexible element 3 of the force measure C with the possibility of interaction with the valve 12 powering. The valve 12 is attached to the base 6 and the exhaust valve (KB) 7 by flexible membranes 18 and 19. The vibrodrive is equipped with T -shaped sleeve 10 fixed on the KB 7 and j located coaxially to the valve 12, with the possibility of interaction with the end surface of KB 7. The T-shaped sleeve has T-shaped channels for supplying compressed air. At that, KB 7 is connected to valve 12 by pursed elastic of element 13. Increasing the frequency of oscillations is achieved by ezhektsionno-. increase in the rate of release) of camera k from the spent portion of the carrier. 2 silt, 3

Description

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The invention relates to drives of vibration-conveying machines and can be used in the mountain, construction and other industries.

Known pneumatic actuator includes a power chamber with a working body, the return element - working: the drive to its original position, the valve of the energy carrier, placed in the movable valve seat and mutually 6-acting with the working body, with the working body and the valve are made with exhaust ports closed in the working half period, and the tail valve is equipped with elastic membranes.

The main disadvantage of this mouth; properties are. what is free- | the top of the working chamber from the spent; the energy carrier is carried out under the influence of forces from the lower working chamber, as a result of which a part of the energy of the permanently charged lower working chamber is spent on forcibly transferring the energy carrier from the upper chamber to the power one. This slows down the operation of the valve, and, accordingly, the full charge of the power chamber acting on the working member is delayed. Frequency of forced oscillations

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working body and the efficiency of energy consumption.

The closest analogue to the technical essence is a pneumatic actuator that contains a power chamber with a working body, on which is located the stop for the power valve, the element for returning the working body to its initial position, the energy carrier supply chamber formed by the seat and the elastic diaphragm attached to the housing, the inlet valves and energy carrier exhaust in the saddle and from the power chamber, glass with a sleeve connected to the body and the saddle by means of membranes and sealing the power chamber mounted on the saddle (prototype).

The disadvantage of this device is the slowed down exhaust of the spent energy carrier from the upper working chamber, since air with an open valve from a wide flow passes to a narrowing when charging the power chamber. Consequently, the release of the upper working chamber is inhibited, and its discharge is effected by the action of forces from the lower working chamber. The transfer of the valve seat in the form of a disk occurs with a delay; accordingly, part of the energy carrier in the transitional half-period is released into the atmosphere through open exhaust windows, without performing any work. The above disadvantages limit the frequency of oscillation of the working body and reduce the efficiency of consumption of energy.

In addition, when increasing the cross-sectional area of the feed holes in the saddle to an area equal to the channel area of the power chamber, the system stops working, since the upper working chamber is not exempt from excessive pressure in it.

The purpose of the invention is to increase the oscillation frequency. I.

The goal is achieved by the fact that a pneumatic actuator containing a working organ connected to the base by a flexible element of the force chamber with the possibility of interaction with a power valve attached by flexible diaphragms to the base and the exhaust valve is provided with a sleeve that is t-shaped in longitudinal section (fixed on the exhaust valve and the power supply located coaxially to the valve with the possibility of interaction with its end surface, wherein the T-shaped in the longitudinal section of the sleeve are T-shaped in the longitudinal section of the channel compressed air supply, wherein the exhaust valve is connected to the supply valve by

preloaded elastic element

When performing a pneumatic vibration drive with a flow of energy carrier, which overcomes repeated contractions and expansions, part of the energy;

5 useless braking

and heating the air, in addition, part of the energy of compressed air is spent on overcoming the resistance of the upper working chamber due to the slow

0 its ejection exemption from

compressed air. This leads to a decrease in the frequency response of the vibro. drive.

In the proposed device saddle

5 valve power made in the form

T-shaped in the longitudinal section of the ZY with T-shaped channels made in it in the longitudinal section, and the channels have the same section and

0 only at the entrance to the power chamber starts them. A sharp expansion, a stream of air directed at an acute angle to the plane of the end face of the supply valve, provides rapid ejector discharge in the valve cavity and the upper working chamber. This ensures unimpeded movement of the exhaust valve upwards and sealing of the power chamber without excessive

0 Bleeding energy into the atmosphere. Such a constructive solution allows to increase the frequency of forced oscillations of the exhaust valve base, and, accordingly, the frequency of oscillations of the working body. property does not have a device prototype.

; The essential features that distinguish the proposed solution from the prototype are that the pneumatic actuator is equipped with a T-shaped sleeve in longitudinal section, fixed on the exhaust valve and co-axially fitted with the feed valve, with the possibility of interaction with its end surface, while in T in the longitudinal section of the sleeve are T-shaped channels in the longitudinal section

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for supplying compressed air, the exhaust valve being connected to the supply valve by means of a preloaded elastic element.

The achievement of this goal was confirmed experimentally during testing of a prototype of a pneumatic vibratory drive as part of a vibrating feeder. During the experiment, it was found that at a constant and equal compressed air consumption of about 10 m3 / min, the frequency response increased from 800-1000 count / min to

1300-1500 col./min

Fig. 1 schematically shows a non-automatic vibro-drive in the half-cycle of powering the power chamber, and on the 2nd - the same, in the half-cycle of idling.

Pneumatic vibro-drive of components from the working body 1, which interacts with the return element 2 by the flexible element 3 of the force chamber k with the stop 5 and the valve system. The latter consists of body parts 6, between which an exhaust valve 7 is placed in the form of a disk, on both planes of which differently sized working chambers 8 and 9 of the exhaust valve are formed. The center of the exhaust valve 7 is provided with a seat 10, made in the form of a T-shaped liner in the longitudinal section, in which the ducts 11 are T-shaped in the longitudinal section, the outgoing part of the ducts 11 of the direction-; The valve 12 is made in the form of a sleeve that is axially movable relative to the valve of the exhaust valve, the exhaust valve is connected with the valve of the feed, windows are made in the housing part 6 by pressing the elastic element 13. / And, periodically blocked by a sealer 15 installed on the exhaust valve 7 of the nozzle 16, through which the axis is 1 pt per liter of the vacuum seal T on the ne 12 12 zi

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There is a constant charging of the working chamber 8, the cushioning disk 17, the diaphragms 18 and 19, which form the working chambers 8 and 9 with the disc of the exhaust valve 7.

The pneumatic vibrodrive operates as follows. Compressed air from the system through the fitting 16 comes into the working chamber 8 and charges

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her. Under the action of the energy carrier, the exhaust valve disc 7 is thrown upward with deflection of the diaphragm 18, sealing the force chamber k by closing the channels 1 with a sealer 15 bonded to the valve; exhaust 7. At the same time the valve for-; The beverage 12 by the support 5 is pressed from the saddle 10 and compresses the spring 13 The energy carrier through channels 11 from the working chamber 8 enters the power chamber 4 and charges it. With a high-speed discharge of a jet of compressed air from; T-shaped in longitudinal section ka-i od 11 in the direction from the center to | the periphery and at an acute angle to the upper plane of the end face of the power supply valve 12 in the cavity, where spring is installed, and 13, respectively, in the top5

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In it, the working chamber 9: due to ejection, a vacuum is created, and force. chamber 4 is reliably sealed with a sealer 15 mounted on the exhaust disc valve 7 Due to the energy of compressed air in chamber k, the working body 1 begins to accelerate with compression of the element 2 to return the working body to its original position. At the same time, the flexible element 3 moves upward with the stop 5 and the valve 12 is energized by the force of the spring 13. The forced upward movement of the working member occurs until the valve 12 e reaches the seat 10, after which air will only flow into the cavity where the spring 13 is installed and the upper working chamber 9, charging it up to pressure in the system. Due to the difference in the working areas of chambers 8 and 9 and the equality of pressure in them, the exhaust valve 7 is rapidly shifted with deflection of the diaphragm 19 and depressurization of the channels

14 by withdrawing from them a hermetic. 15 together with the valve 7. Compressed air from the power chamber 4 is exhausted into the atmosphere, and the working body

1 is rapidly accelerated down by the action of stored energy in the return elements 2. When moving up | rum 5 the valve 12 is pressed from the power supply from the saddle 10 and the air is directed through channels 11 of a T-shaped shape in longitudinal section to the power chamber k with the creation of a vacuum in the working chamber 9. Valve 7 with a sealer

15 under the action of forces in the chamber 8 is moved upwards with sealing

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force chamber 4, by pressing the sealer to the exhaust channels And, and the cycle is repeated again,

The combination of new structural elements, which fundamentally change the power cell powering circuit, makes it possible to increase the oscillation frequency of the working member by 1.5 times compared with the prototype.

Claims (1)

Invention Formula Pneumatic vibrodrive containing a working member connected to the base by a flexible element of a force chamber with the possibility of interaction with a power supply valve, fastener 15681 8 flexible membranes to the base and the exhaust valve, which is designed so that, in order to increase 4acTqTbi oscillations, it is equipped with a T-shaped sleeve in longitudinal section, fixed on the exhaust valve and located coaxially to the clap powering with the possibility of interaction with its end surface; in this case, T-shaped longitudinal section of the sleeve has T-shaped longitudinal sections of the channels for supplying compressed air, the exhaust vent valve being connected to the power supply valve by means of a compressed elastic element. I J: 5yuy 19 18 L 12 00