SU1472966A1 - Sealing device of gas-filled switching apparatus - Google Patents

Abstract

The invention relates to electrical engineering, in particular, to gas-filled high-voltage apparatuses, and is intended to seal the shaft or stem of a transmission drive mechanism passing through the casing of the apparatus body. The purpose of the invention is to increase the reliability and service life of the sealing device. This device has at least two grooves 4, 5, made on the surface of the sleeve 1 or the shaft. O-rings 6, 7, for example rubber, are inserted into these grooves. A sealing liquid is introduced into the space between the rings 6, 7 for additional sealing. In order for this fluid to always be at a pressure equal to the pressure of the gas in the apparatus, one of the grooves, located on the high pressure side, is made wider than the thickness of the sealing ring. Maintaining high fluid pressure prevents high pressure gas from entering the space between the rings. Since fluid flow is much less than gas flow, gas leaks are reduced and the life of the apparatus is increased. 2 hp f-ly, 4 ill.

Description

device compared with the known is a reduction in its dimensions, especially in the transverse direction, since

production of additional grooves with a diameter of large diameter

grooves with a sealing ring. In this case, the size of the sealing device does not increase longitudinally. The effectiveness of the use of the sealing liquid is increased, since for the purpose of sealing almost all the volume of the liquid is used. The sealing characteristics are not affected by the spatial orientation of the sealing device, while the known device cannot be placed vertically or inclined when the area is high.

0

five

0

in - the width of the sealing ring, measured in the radial direction; a - thickness of the sealing ring

25 An apparatus according to claim 1, characterized in that, in order to facilitate the assembly time, the groove, located on the pressure side, is made with additional broadening on the edge that is closer to the pressure side.

3 "The device according to claim 2, characterized in that in order to facilitate assembly, the shaft or rod passing through the seal assembly is made with a longitudinal groove, and this groove is located outside the seal assembly

fa 2

Y

fig.Z

1 b

    if

"M" Ml "M.1J

fig

Claims (3)

Claim 1 ”A gas-filled switching apparatus sealing device comprising a shaft or stem jq and a sleeve surrounding them, as well as at least two o-rings of elastic material and at least two o-ring grooves for accommodating o-rings in them, with the space between the two o-rings filled with a sealing fluid or grease, characterized in that, 20, in order to increase reliability and service life, at least one groove located on the high side o pressure, has a width A, determined by the ratio of 25 A> AB / B, where B is the depth of the groove; in - the width of the o-ring, measured in the radial direction; a - the thickness of the o-ring " thirty 2 "The device according to π. 1, characterized in that, in order to facilitate assembly time, the groove located on the high pressure side is made with additional broadening on the edge that is closer to the high pressure side. 3 "The device according to p. ^ Characterized in that in order to ₄ θ facilitate assembly, the shaft or rod passing through the seal assembly is made with a longitudinal groove, and this groove is located outside the seal assembly"