RU1780117C - Gas-discharge apparatus - Google Patents

Abstract

Usage: when creating high-voltage gas-discharge devices, in particular controlled dischargers. SUMMARY OF THE INVENTION: In order to increase the electric strength, reduce the weight and dimensions of the device, the insulator separating the electrodes is made in the form of a coaxially arranged cylinder and two truncated cones, the smaller bases of which are connected to the cylinder and the large bases are directed in opposite directions. The sizes of the truncated cones are selected from the expression 0.4 < D2-DI2 I < 0.99, where DI is the diameter of the smaller base of the truncated cone; D2 is the outer diameter of the larger base of the truncated cone: I is the length of the generatrix of the truncated cone. 2 ill.tnU - k ^ -. The invention relates to a gas-discharge technique and can be used to create high-voltage controlled discharges. Increasing the high-voltage device to 100-130 kV causes a significant increase in its overall dimensions and mass. This is due to the fact that the outer part of the cylindrical surface of the insulator is directed along the electric field lines and only a small part, namely the jumper and the protruding edge of the insulator, are located across the electric field lines. The aim of the invention is to increase the electric strength of the high voltage gas-discharge device, reducing the overall dimensions and its mass. In a gas-discharge device containing electrodes separated by an insulator made in the form of interconnected to axially spaced cylinder! and a truncated cone, the insulator contains a second truncated cone, the smaller bases of both cones are connected to the cylinder, and the larger bases are directed in opposite directions, while the sizes of the truncated cone are selected from the expression: na ^^^ - 'SilOO0,4 < Da -Pi 2 I < 0.99, where DI is the outer diameter of the smaller base of the truncated cone of the ceramic insulator, m;

Description

D2 is the outer diameter of the larger base of the truncated cone of the ceramic insulator, m;

I is the length of the generatrix of the truncated cone of the ceramic insulator, m.

The proposed design of a gas-discharge device has high dielectric strength, smaller overall dimensions and mass due to the fact that most of the surface of the insulator, namely the surface of truncated cones, is located across electric field lines and only a small cylindrical part along the field lines, which increases and the sample path along the surface of the insulator, and therefore, the electrical strength of the device

Sources of information that would describe the distinguishing features of the present invention have not been identified.

Figure 1 shows the proposed high voltage gas discharge device; Fig. 2 shows the sample voltage variation curve in relative Unp / Unp.M3Kc units from the angle of the conical surface of the insulator (I.

The spark gap (Fig. 1) contains two electrodes 1 and 2, separated insulators 3 with terminals 4 and 5.

The insulator 3 consists of three coaxially arranged hollow bodies of revolution: a cylinder and two truncated cones connected to the cylinder by smaller bases and large bases directed in opposite directions.

The dielectric strength depends on the position of the surface of the truncated cone with respect to the field lines of force.

The most electric strength of the insulator will be if the surface of the truncated cones is across the field lines of the electric field.

The dependence (Fig. 2) has a pronounced extremum, which corresponds to an angle. As the angle changes in both directions from 90 °, the breakdown voltage decreases. Moreover, with a decrease in the angle, a sharper decrease in the breakdown voltage is observed than with an increase. This is due to an increase in the field inhomogeneity at the output edges of the electrodes 1 and 2. In the middle part of the device, the electric field is more uniform, therefore, with an increase in the angle, the decrease in the breakdown voltage is less pronounced.

When passing to the geometric dimensions of a truncated cone at an extreme point, it has the expression

 : Sin a / 2

For a gas discharge device (discharge), a reduction in dielectric strength of 10% of the maximum value is acceptable. This decrease corresponds to an angle in the range of 45-164 ° C.

In this case, to obtain the greatest electric strength, it is necessary to observe the following ratio between the geometric dimensions of the truncated cone:

fifteen

0.4

where DI is the outer diameter of the smaller base of the truncated cone of the ceramic insulator:

D2 is the outer diameter of the larger base of the truncated cone of the ceramic insulator:

I is the length of the generatrix of the truncated cone of the ceramic insulator.

Claims (1)

An example of a specific implementation. The proposed sample design for a sample voltage of 130 kV is made with the following dimensions: diameter of the larger base of the truncated cone mm, cylinder diameter mm, overall height of the ceramic insulator 100 mm. SUMMARY OF THE INVENTION A gas-discharge device containing electrodes separated by an insulator made in the form of a coaxially arranged cylinder and a truncated cone, characterized in that, in order to increase the electric strength, reduce the dimensions and weight of the device, the insulator contains a second truncated cone, smaller the bases of both cones are connected to the cylinder, and the large bases are directed in opposite directions, while the dimensions of the truncated cone are selected from the expression D2-DI 0.4  0.99, 2 I fifty where DI is the outer diameter of the smaller base of the truncated cone of the ceramic insulator, m: D2 is the outer diameter of the larger base of the truncated cone of the ceramic insulator, m: I is the length of the generatrix of the truncated cone of the ceramic insulator, m. Iht U / y ficiKc % z.1