SU1446403A1 - Radial-end face seal - Google Patents

Abstract

The invention relates to a sealing technique and makes it possible to increase the reliability and resource of a seal intended for sealing mobile connections. The proposed seal comprises a sealing ring 1 made of an elastic material, a support ring 2, the end surface of which 3 is made wavy or inclined to the axis 4 of the shaft 5, and the distance from the end surface of the support ring to

Description

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positive end surface of the groove, which contacts the sealing ring, alternating along its perimeter. In the bracelet spring 6 can be installed ptnur of porous material, impregnated with lubricating fluid, or it can be enclosed in a protective sheath

from porous material. During operation, as the material of the sealing ring is worn, a gap on the end face 11 of the groove 8 and the shaft (or cylinder) 5 is not formed, as the bracelet spring 6 deforms the sealing ring 1 by the amount of wear. 4 hp 4 il.

The invention relates to a sealing technique and is intended for sealing mobile connections.

The aim of the invention is to increase the reliability and compaction life by increasing the efficiency of the elastic element and expanding the range of its use.

FIG. 1 shows the construction

radial-face seal with a support ring, the end surface of which is made inclined to the axis of the shaft; in fig. 2 - the same, with an end surface made wavy but; in fig. 3 - the same, with a bracelet spring, inside of which is installed a cord made of porous material; in fig. 4 - the same, with a bracelet spring enclosed in a protective sheath, made of porous material.

The seal consists of a sealing ring 1, made of an elastic-rigid material such as plastic, a support ring 2, the end surface 3 of which is inclined at an angle d- (or wavy but) to the axis 4 of the shaft or cylinder 5, and a bracelet spring 6 that rests on the conical surface 7 of the sealing ring 1 and the end surface 3 of the support ring 2. The radial mechanical seal is installed in the mounting groove 8 of the cylinder (or shaft) 9,

The ring 1 is in contact with the shaft (or cylinder) 5 and the end surface opposite to the cavity being sealed 10; gyu 1 groove 8

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The support ring 2 can be made with an end surface 12 of a wavy shape (FIG. 2).

The bracelet spring 6 may be filled with a cord 13 made of a porous material and impregnated with a lubricating fluid (Fig. 3), or enclosed in a protective sheath 14 made of a porous material (Fig. 4). The distance H from the end surface 3 of the support ring 2 to the opposite end surface P of the seat groove 8 is variable along its perimeter from H cd to Nd, d.

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The device works as follows.

Bracelet strap 6, which can be filled with cord 13 or enclosed in a porous sheath 14, is mounted on the conical surface of the 7 o-ring 1 and rests on the end surface 3 of the support ring 2, which is inclined (or wavy) in relation to axis 4 of the Gili shaft of the cylinder) 5, and presses the sealing ring 1 simultaneously to the surface of the shaft (or cylinder) 5 and the end 1 of the mounting groove 8, occupying a different position depending on the width of the groove 8 (distance H) on the conical surface 7 of the seal - those nogo ring 1, and creates a correspondingly different magnitude of contact pressure on the sealing ngh surfaces 15 and 16 along the perimeter of the seating grooves 8. In operation, by sealing edges of the sealing ring 1 formed hydrodynamic wedges, i

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Claims (5)

Claim 1. Radial mechanical seal, _ί containing a sealing ring, made and? elastic material, and a bracelet spring resting on the contour surface of the sealing ring and the end of the landing groove, which is distinguished by the fact that, in order to increase reliability, a support ring is installed between the bracelet spring and the end of the landing groove, the plane of the end face of which is in contact with the spring is made inclined to the shaft axis and the ends of the landing groove, and the distance from the end surface of the support ring in contact with the spring to the opposite end surface of the landing groove, with which Second contacts the O-ring, alternately along its perimeter. 2. Seal by π. 1, characterized in that the end surface of the support ring in contact with the spring is made wavy relative to the opposite ends of the landing groove. 3. Seal by π. 1, characterized in that the bracelet spring has an itnur made of a porous material and impregnated with a lubricating fluid. 4. Sealing by π. 1, characterized in that the bracelet spring is enclosed in a protective shell made of a porous material. 5. The seal according to paragraphs. 3 and 4, characterized in that foam rubber is used as a porous material. FIG. 2