SU1641444A1 - Acoustic vibration generator - Google Patents

Abstract

This invention relates to technical acoustics and can be used to generate acoustic vibrations in aqueous electrolyte solutions. The purpose of the invention is to increase the efficiency and expansion of the frequency range of the emitted acoustic oscillations. The device contains a frame filled with electrolyte and made in the form of two coaxial cylinders of epoxy compound. Seawater is used as electrolyte. The permanent magnets are ring-shaped of ferrite material, and are installed without gaps between the cylinders in a plane perpendicular to their longitudinal axis, opposite poles to each other. Membranes made of epoxy compound, installed without gaps, one between adjacent magnets and cylinders along their form. Electrodes 8 and 9, 10 and 11, made of titanium alloys, are fixed to HS opposite sides of the membranes Elekpods 9 and 11 are connected to each other by sealed wires 12 and 13, and electrodes 8 and 10 are connected by wires 14 and 15. Using wires 13 and 15, electrodes are connected to alternating voltage generator. In the wall of one cylinder on the opposite side of each electrode 10, 9 and 8 relative to the longitudinal axis of the cylinders, one through hole 16 and 17, 18 and 19, respectively, are made, 3 or more. 6-6 17 16

Description

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The invention relates to technical acoustics and may find application in the study of the physicochemical properties of aqueous solutions of electrolytes, as well as in measuring broadband acoustic systems.

The purpose of the invention is to increase the electroacoustic efficiency and expand the frequency range of the generated oscillations.

Figure 1 shows the device, a fragment of a partial frontal section; HP figure 2 - section A - A m B - B in Fig 1,

The device consists of a frame made of two coaxial cylinders 1 and 2 of the epoxy compound, between which there are fixed gaps 3-5, without gaps, facing each other by opposite poles. Between magnets 3-5 there are membranes 6 and 7 of epoxy compound, on opposite sides of which electrodes 8-11 are fixed, made of titanium alloys. Electrodes 9 and 11 are interconnected by sealed wires 12 and 13, and electrodes 8 and 10 are connected by wires 14 and 15. Using wires 13 and 15, electrodes are connected to an alternating voltage generator In the wall of cylinder 2 on the opposite side of each electrode relative to the longitudinal axis the frame is made through holes 16 - 19.

The device works as follows

When immersed in the nautical aodu-. The cavity between cylinders 1 and 2 is filled with it through the holes 16-19, which, in addition, provide the electrical connection of electrodes B and 11, 9 and 10 with each other, the magnets 3-5 create a unidirectional magnetic field between them, oriented along the cylinders 1 and 2.

When the alternating voltage generator is turned on between electrodes 8 and 9, 10 and t1, a current flows through the seawater along concentric circles. The implementation of magnets from ferrite materials prevents the flow of current directly between the electrodes 8 and 11, 9 and 10 through the material of the magnet 4, and the installation of membranes 6 and 7 between adjacent magnets 3 and 4, 4 and 5 eliminates the flow of current through the shortest path between the electrodes 8 and S, (O and 11.

The arrangement of adjacent membranes 7 and b in one plane, passing through the axis of cylinders 1 and 2 on opposite sides of it, allows to obtain unidirectional concentric currents in the space between

With DNA 3 and 4, 4 and 5, by connecting electrodes 8 and 11, 9 and 10 to the generator, phase to phase. Then through holes 16 and 19, 17 and 18 between the electrodes 11 and 8, 10 and 9 flow

the additional currents, which within the internal volume between cylinders 1 and 2 are unidirectional, are synchronous and in-phase with the main concentric currents and therefore are folded with them, which leads

0 to preserve the density of currents in the space between the poles of the magnets,

The presence of holes 16-19 allows the paths of additional currents to be separated and, thus, to exclude the insulation of the electrodes 8 and

5 II, 9, and 10 from each other by subtracting additional currents (counter currents) within one hole, and therefore creates the condition for the additional currents to flow unhindered. Then

0 alternating currents flowing in the internal space between cylinders 1 and 2 in the unidirectional magnetic field of magnets 3 and 4, 4 and 5 create synchronous and in-phase ampere forces, variable

5 times, than provide the generation of acoustic oscillations in seawater in the frequency range -june, extended to the low-frequency region in comparison with the known device. Force synchronization

0 Ampere is confounded by the fact that the diameter of the cylinder 2 re exceeds half the length of the shortest wavelength of the oscillations generated.

An increase in the equivalent compressibility of the electrolyte (sea water) filling the space between cylinders 1 and 2 due to the fact that cylinder 1 is made hollow and sealed results in an increase in the rational component of the oscillatory velocity of the electrolyte in the space between the cylinders, which increases the electroacoustic efficiency devices.

Claims (1)

Claim 5 Device for generating acoustic oscillations, comprising a skeleton of a dielectric material, in the walls of which through holes are made, a permanent magnet, membranes of dielectric material and electrodes connected to an alternating voltage generator; characterized in that, in order to increase the electroacoustic 5 efficiency and expand the frequency range, additional permanent magnets are introduced into it, the frame is made in the form of two coaxial hollow ilindrov between which coaxially ustanoeleny without radial Azores opposite poles of each To a friend, permanent magnets made of ring-shaped membranes with electrodes located on opposite sides are installed one without gaps between adjacent permanent magnets and cylinders along them forming in the plane passing the incision of the frame axis, while the adjacent membranes are diametrically opposite to the frame axis and the through holes are made in the outer cylinder with the side opposite to the longitudinal axis of the frame from each electrode.