RU1831769C - Emissive system - Google Patents

Abstract

Usage: tactical acoustics and vibration technology, in particular acoustic and hydroacoustic exciters. SUMMARY OF THE INVENTION: The radiating system comprises a cylindrical body with two electro-acoustic transducers coaxially placed inside it. A reactive load compensation device has been introduced into the housing, which is mounted on the axis of the housing between two converters and is designed as a power oscillatory drive and elastic elements. The latter are connected to sound-emitting elements. Each sound-emitting element is made in the form of a glass with a power drive located inside it. Between the side surface of the cup and the cylindrical body, ferromagnetic-liquid seals are located .2 ill.

Description

The invention relates to technical acoustics and vibration technology, in particular to electrodynamic exciters, and can be used in acoustic and hydroacoustic devices, in vibration stands, in technological processes when processing various media.

An object of the invention is to increase the efficiency by compensating for reactive load.

On Fig, 1 shows a schematic illustration of a radiating system; in FIG. 2 - a schedule of the emitting system.

The radiating system consists of a cylindrical body 1, in which transducers consisting of stator induction coils 2 and 3 and coaxially placed 4 and 5 are placed coaxially from two ends, Anchor 4 and 5 are fixed on axes 6 and .7, ends which are fixed to the bottoms of the piston emitters 8 and 9, the piston emitter 8 is made in the form of a cup, the bottom of which is a radiating surface, and the side surface (wall) is a guiding movement inside the cylindrical body 1.

The power drive, the induction stator - to the coil 2 and the core 4 are located inside the cup-shaped piston-emitter 8.

Between two coaxially arranged transducers in a cylindrical housing 1, a power oscillatory drive consisting of a stator coil 10, core 11 and elastic elements 12 and 13 is mounted to compensate for reactive load.

The anchor 11 is connected through the axes 6 and 7 to the piston emitters 8 and 9 through the elastic elements 12 and 13. In the gap between the wall of the piston emitter 9 and the inner surface of the housing 1, ferromagnetic-liquid seals are installed, consisting of O-rings

with

with

GO

h |

oh oh

with

magnets 14 with poles 15, a sealing ring 16 and a ferromagnetic fluid 17 placed in the volume 18.

For a better understanding and impudence of the operating mode and compensation of the reactive load, we construct a graph of the time dependence of the currents (shaded sections) in the induction coils 2, 3, and 10 and the displacement of the cores 4, 5 and 11 (which corresponds to the movement of the emitting pistons 8 and 9) on the axial lines x Ti and T3, FIG. 2.

The radiating system operates as follows.

We apply a current And to a induction coil 2 in such a direction that measles 4 moves to the right; there is no current in the induction coils 3 and 10. Under the influence of the forces of the elastic elements 12 and 13, the cores 3 and 10 also move to the right.

At 0 °, the current in the induction coil 2 is turned off, and a current 12 is applied to the induction coil 3 so that the measles 5 moves to the left. Moving the korea from 0 to 90 ° will be carried out as follows.

The armature 4 will move to its maximum deviation due to the reaction of the medium Xs, and the core 5 to 0 ° due to the current in the induction coil 3. Due to the reaction of the medium Xs and the current in the induction coil 3 at 90 °, the maximum compression of the elastic elements 12 and 13 and the accumulation of potential energy in them.

At 90-180 °, there are no currents in the induction coils, the movement of the cores is carried out by redistributing the potential energy of the elastic elements 12 and 13 and the reaction of the environment Xs to measles 5. All measles move to the left.

At a mark of 180-270 °, we supply a current And of opposite polarity to the induction coil 2 and a current of 1h to the induction coil 10. The current in the coil 3 continues to be absent. In this case, the movement of the korea is as follows. The armature 4 moves to the left due to the current h in the induction coil 2 and the current b in the induction coil 10 through the core 11 and the elastic element 12, and the core 5 moves to the right due to the kinetic energy of the elastic element 13.

Subsequently, at around 270–360 °, currents I, la, and 1z of a different polarity are supplied to coils 2, 3, and 10. All measles 4, 5 and 11 move to the right: measles 4 from its maximum deviation moves to the zero position, measles 11 crosses the zero point with acceleration and moves

from its maximum deviation, measles 5 also reaches its greatest deviation to the right.

At 360-90 ° (i.e. 0-90 °) currents And and

1c in coils 2 and 10 are absent, and on coil 3 the current is reversed. The anchors in this section come together, compress the elastic elements 12 and 13, accumulating potential energy in them, and measles 4

moves to the right due to the reaction of the medium Xs, and the measles 5 moves to the left due to the current h in the induction coil 3. Next, the process of switching currents in the induction coils is repeated.

Considering the combined operating schedule of the emitting system, we generally see that in sections 0-180 ° there is no current in coils 2 and 10 1, and there is also no current in section 90-270 ° in coil 3. It follows that

the operation of the emitting system is not interrupted, and there is no current in the induction coils at certain intervals of the oscillation period of the system. This suggests an increase in the coefficient of usefulness.

the operation of the system through the use of reactive energy of the medium.

Thus, by controlling the currents in induction coils 2, 3, and 10, we use the reactive component to increase

Efficiency of the radiating system.

Ferromagnetic liquid seal operates as follows.

Antifriction rings 16 (for example, a ring of: fluoroplastic compositions) create a minimum gap between the cylindrical body 1 and the lateral surface of the piston-emitter 9, providing it only sliding along the axis. With a permanent magnet 14. a -magnetic field is created which, passing through the shoes 15, closes through the gap.

The ferromagnetic fluid 17 located in the volume 18 is drawn by the magnetic field from the volume 18 into the gap and, depending

from the strength of the magnetic field, compacts it.

In this way, a fluid barrier of PMF is created. providing glide (movement) to the piston emitter and being a sufficient obstacle

for water to enter the inside of the converter,

The use of such emitting systems will allow the creation of compact economical devices capable of generating a wide band of sound and infra-sound frequencies.

Claims (1)

. The claims A radiating system comprising a cylindrical body with two electro-acoustic transducers coaxially placed inside it, each of which consists of a magnetic circuit, a permanent magnet, an induction coil and a sound-emitting element, so that in order to increase the efficiency, a reactive load compensation device installed on the axis of the housing between two transducers and made in the form of a power oscillatory drive and elastic elements connected to sound-emitting elements, each of which is made in the form of a glass with a power drive placed inside it, and ferromagnetic-liquid seals are located between the side surface of the glass and the cylindrical body . eighteen Fig. / -Ј g y J i / ri / tk   S. 1Sh 110 ° 360 ° --1831769 g y J i / ri / tk Figure 1