SU1209314A1 - Vibration exciter - Google Patents

Abstract

A vibration device comprising a housing (1) having accommodated by means of resilient elements (2) a cartridge (3) capable of reciprocating thereinside. The cartridge (3) accommodates an air distribution system (5) communicable with a source of compressed air and the atmosphere. A cap (8) is rigidly connected to an end face wall (9) of the housing (1) to define therewith a chamber (10). Disposed in this chamber (10) is a piston (11) rigidly connected to the cartridge (3) by means of a rod (12), and a first resilient stop element (13) adjoining by its peripheral surfaces (14, 15) end faces (16, 17) of the piston (11). The cap (8) and piston (11) are provided each with at least one capillary passage (18, 19), whereas secured on the rod (12) is a second resilient stop element (20) adjoining by its peripheral surfaces (21, 22) outer and inner surfaces (23, 24) of the end face wall (9) of the housing (1). <IMAGE>

Description

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The invention relates to the building materials industry, the chemical industry and can be used as a dynamic intensifier of technological processes.

A device is known for compacting a concrete mix in a mold containing vibroblocks connected by a pipeline to a spool distributor, which causes an electric motor lj to rotate.

The disadvantages of this device are the presence of a parasitic volume of pipelines connecting the spool valve to the working chambers, as well as the impossibility of using the device in an explosive environment due to the presence of an electric motor.

The closest in technical essence to the invention is a vibration exciter comprising a cylindrical body with lids on its ends, a resonator plate with cavities and channels coaxial with it and forming with the help of elastic elements working chambers connecting the plate with the body with elastic elements , a pressure source connected by channels with working chambers, and a distribution device located in the cavities of the resonator plate. The switchgear is made in the form of solenoid valves connecting the working chambers to the air lines of compressed air 2.

The disadvantages of the known device are the presence of an electromagnetic switchgear, which is dangerous when used in an explosive environment, and the inability to adjust the amplitude of oscillations.

The purpose of the invention is to ensure the explosion of the vibration exciter and adjust the amplitude of vibration.

The goal is achieved by the fact that, in an exciter comprising a cylindrical body with lids on its ends, a resonant plate with cavities and channels coaxially aligned with it and forming with the help of elastic elements working chambers connecting the plate with the body with elastic elements, the source pressure connected by channels

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with working chambers, and a distribution device located in the cavity of the cavity plate, the latter is made in the form of a shaft and a sleeve, 5 with h evenly spaced around the circumference of the slots.

In addition, the exciter is equipped with a amplitude adjustment mechanism, made in the form of a disposed 10 in a chamber formed by a housing and one of the covers, and a piston attached to the resonator plate and connecting it with the walls of the diaphragms.

FIG. 1 shows the vibration excitation, cross section; in fig. 2 -, section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. one; in fig. 5 - section, cut GGD in FIG. four; in fig. 6 - 20 times cut DD in FIG. one,

The vibration exciter comprises a housing 1 ,, to which the bottom 3 and the top 4 covers are rigidly fixed with the help of bolts 2. Inside housing 1 with

2S of elastic elements 5 a movably mounted resonator plate 6 forming with the case 1 and the elastic elements 7 and 8 the lower working chamber 9, and with the upper edge 4 and elastic

30, an element 10 — an upper working chamber 11. In the cavity 12 of the resonator plate 6, a distributor device 13 is installed, consisting of a shaft 14 and a sleeve 15, In the latter, radial slots 16-19 are made, To the resonator plate 6, using hub 1, 20 is attached a piston 21 mounted in the chamber 22 formed by the housing 1 and the lower cover 3 and connected with

Q by the walls of the housing 1 by means of the diaphragm 23, which together constitute the amplitude control mechanism. Chamber 22 is connected to a pressure source PI (not shown).

 Axial bores 24 and 25 are in the shaft 14 on both sides, in the zone of which radial slots 26 and 27 are made. At the upper end of shaft 14 a turbine 29 is installed in cavity 28. When channel 30 is used, cavity 28 is connected to a source of pressure Ru (not shown ) and with the atmosphere. The annular channel 30 is connected to a source of pressure P (not shown).

50

55 A vibrating object is attached to the flange 31. Slots 19, 16 and 17, U are offset in pairs with one

another on the corner

oi where and is the number of slots.

The vibration exciter works as follows.

The working agent is delivered by pressure R to cavity 28 and is discharged from it through channel 30 to the atmosphere. At the same time, it rotates the turbine 29 and, consequently, shaft 14 connected to it. At the same time, working agent P is fed into the annular channel 30. In one half-period of oscillation, the working agent from the annular channel 30 through slots 18 and 27 and the opening 25 enters in the upper working chamber 11, in which the pressure increases. In this case, the resonator plate 6 moves relative to the housing 1.

The working agent from the lower working chamber 9 is vented to the atmosphere through channels and slots. In the next half-period of oscillations after 1209314

scream

shaft angle c;

working agent from the channel 30 through the slots 16 and 26 and the hole 24 enters the lower working chamber 9, in which the pressure increases. At the same time, the upper working chamber 11 is connected by channels and slots with the atmosphere. Under the action of pressure, prototype movement of the resonator plate 6 relative to the housing 1 occurs. The stiffness of the elastic system is regulated by pressure P, in chamber 22. The vibration exciter is tuned to near-resonant operation by means of pressures and P. The oscillation amplitude is regulated by pressure P.

The adjustment of the adjusting device pneumatically or hydromechanically ensures the explosion safety of the proposed exciter and makes it suitable for operation in an explosive atmosphere.

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Compiled by Yu. Mishin Editor S. Saenko Tehred A. Babinets Proofreader I. Muska

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Order 353/14 Circulation 429Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch ShSh Patent, Uzhgorod, st. Project, 4

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Claims (2)

1. VIBRATOR, comprising a cylindrical body with covers at its ends, housed in a housing coaxially with a resonator plate with cavities and channels and forming with it using elastic elements; working chambers that connect the plate to the housing, elastic elements, a pressure source connected by channels to the working chambers, and a switchgear located in the cavities of the resonator plate, characterized in that, in order to ensure the explosion protection of the vibration exciter, the switchgear is made in the form of a shaft and a sleeve having η slots evenly spaced around the circumference. 2. Two bearing screen according to Claim. 1, about tlichayuschiysya in that in order to adjust the amplitude of the vibrations, it is provided with a regulation mechanism _of the amplitude, designed as dimensions ® schennogo chamber formed cor- f pusom and one of the covers, and prikrep- V piston ζ flush to the resonator plate and connecting it with the walls of the diaphragm casing. S>