SU782889A1 - Hydraulic vibration exciter - Google Patents

Description

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The invention relates to devices for exciting oscillations and can be used in the building materials industry, for example, for compacting concrete mixes, as well as B1 of other branches of the national economy.

A hydraulic vibration exciter is known, which contains a hydraulic cylinder and an eccentric mechanism, made in the form of a rotating clip with a cone located eccentrically inside it, equipped with radially located pistons, spring-loaded in the direction of the clip, the piston spaces of which are connected to the working cavity of the hydraulic cylinder I

The known device excites oscillations of only one frequency, moreover, it does not provide the ability to change the parameters of vibration.

The aim of the invention is to obtain two-frequency oscillations.

To achieve this goal, the inner surface of the cage, interacting with the pistons, is made wavy so that its depressions are located diametrically opposite to its

protrusions — and each is equipped with a ball interacting with a wavy surface.

In addition, the exciter is equipped with an eccentric sleeve, which surrounds the shaft of the rotating cage and is installed with the possibility of rotation around its axis.

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Figure 1. Shows a hydraulic vibration exciter, a longitudinal section; figure 2 - the same cross section.

I The vibration exciter contains a hydraulic cylinder (not shown in the drawing) and an eccentric mechanism, made in the form of a rotating casing 1 with a wavy inner surface and a stationary body 2 with sub-pistons 3. Sub piston. spaces 4 are connected to the working cavities of the hydraulic cylinder. The shaft 5 of the holder 1 is installed in an eccentric sleeve 6, having the ability

25 is rotated around an axis, and the pistons 3 are equipped with balls 7. The wave height of the inner surface of the sleeve 1 is less than the maximum eccentricity of the sleeve 6.

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Vibrovr the exciter works as follows. , -, .... . When the cage 1 rotates, the 3 pistons are finished; The return and post return points are pressed, the direction of the piston is generated and the pressure on the hydraulic cylinder 4 is created. Why does the Hydrocyne Rod Lindra experience two-frequency oscillations: low frequency oscillations, | ® dangling FROM the rotation frequency of wave 1, and high frequency oscillations, determine the number of periods. internally to her

of the wavy surface of the cage 1. The bentcentricity of the hub b and the sleeve should be rotated around its axis during operation to change the vibration parameters.

Such an embodiment of the hydraulic vibration exciter makes it possible to increase: its efficiency. For example, when a concrete mixture is affected by two-frequency vibration, moreover, by changing,:,., N) by a larger amplitude, the processing time is shortened and the quality of the product is improved.

Claims (2)

Claims 1. Hydraulic vibration exciter comprising a hydraulic cylinder and an ex centric mechanism, made in the form of a rotating cage with eccentrically disposed inside it with a stationary body, equipped with radially disassembled pistons, spring-loaded in the direction of the armor, the piston spaces of which are connected to the working cavities of the hydrocyliner, O and h and y However, Of the purpose of obtaining two-frequency oscillations, the inner surface of the cage, interacting with the pistons, is made wavy so that its depressions are located diametrically opposed, you. stupas, and each piston is equipped with an S ball interacting with a wavy surface. 2. Bibliocatacator according to claim 1, characterized in that, for the purpose of regulation, it is supplied with. 0 with an eccentric bushing, which engages the shaft of the rotating cage and the installed q possibility of rotation around its axis. Information sources . taken into account in the examination 1. USSR author's certificate No. 180124, cl. B 06 B 1/20, 1963.