SU1326793A1 - Electric-to-hydraulic converter - Google Patents

Abstract

The invention can be used in electro-hydraulic or electropneumatic systems of automatic control of various technological equipment. The invention makes it possible to increase the reliability of operation by eliminating the electrical breakdown of the interelectrode gap, which is achieved as a result of a decrease in the strength of the electric field between the electrodes and the elimination of the ion drift on the walls of the housing. This is possible due to the fact that in the proposed construction of the device one of its tube-type electrodes is made in the form of truncated hollow cones, which are located along the axis without a gap, and consistently. Truncated hollow cones - electrodes are electrically interconnected with each other and the needle electrode through resistors. 1 il. (C (/; from rs: o: its OS

Description

The invention relates to mechanical engineering and can be used in electro-hydraulic or electropneumatic systems of automatic control of various technological equipment.

The aim of the invention is to increase the reliability of the converter.

The drawing schematically shows the proposed Converter.

The electro-hydraulic converter consists of a dielectric body 1 with concentric and successively placed each other electrodes like needle 2 and a tube.

Flat electrodes 3-7, forming a tube-type electrode, are located without a gap between adjacent planes so that the plane of the truncated tip of each cone lies in the plane of the base of the adjacent cone — electrode. All electrodes are isolated from each other by means of conductive rings 8 and electrically interconnected through resistances 9 of a high-resistance divider, which is supplied with high voltage from an adjustable high-voltage source 10. The electrode 2 is connected to the negative pole of the source 10, and the flat electrodes 3 -7 - to positive and grounded. The internal cavity of the housing 1 of the transducer is completely filled with a dielectric fluid, which can be used as a liquid or gaseous dielectric.

In order to eliminate the occurrence of a corona discharge between flat electrodes, the latter, at their peaks, are truncated cones rounded.

Electro-hydraulic converter works as follows.

When applied to an adjustable low-power source 10 of a control signal (for example, a voltage), a high voltage is produced at its output applied to a high-resistance divider and, through its resistance, to electrodes 2-7. Under the action of a high voltage between the needle electrodes 2 and the flat electrode 3, a strong sharply negative effect forms.

3 3

a non-uniform electric field, leading to the formation in the immediate vicinity of the needle tip surface of unipolar ions having the same sign of charge,

as the potential of the needle electrode, i.e., negative. Under the action of the Coulomb force, the ions of the dielectric fluid repel from the point of the needle and begin to accelerate in their movement by the electric field between the needle electrode 2 and

0 flat 3. Moving with acceleration, the flow of ions as a result of friction and collisions with the surrounding neutral molecules of the fluid transfers their momentum to them and carries them along. Having reached the flat electrode 3, an insignificant part of the ions recombines, and their basic mass, together with the captured neutral liquid, continues its accelerated motion through the hole in the flat electrode 3 and then falls into the gap between the flat

0 electrodes 3 and 4. Between electrodes 3 and 4 a homogeneous electric field also acts on the charged fluid, which continues to accelerate it, leading to an increase in its velocity. Pass through the accelerating uniform field between the electrodes

5 3 and 4, the liquid enters again in the same field between the electrodes 4 and 5, and so on. As a result, the hydraulic signal (pressure or fluid flow) at the output of the converter increases.

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Claims (1)

Invention Formula An electro-hydraulic converter containing a housing filled with a dielectric fluid with needle-tube electrodes placed in it, connected to a high-voltage controlled voltage source, characterized in that. In order to increase the reliability of the converter, the tube-type electrode is made in the form of truncated hollow cones located along the axis concentrically and sequentially without a gap between adjacent planes of truncated cones and electrically connected with each other and with a needle-type electrode through resistors. f 5 s 7 Uynp VNIIPI Order 3262/30. Circulation 639 Subscription Production and printing company, Uzhgorod, st. Project, 4