SU1016600A1 - Shaft stuffing box seal - Google Patents

Abstract

A shaft seal, containing cortus, enclosed in a separator, по ав ами, ами ами ами,, ью ью ью ью,,,,,,,, охват охват охват охват охват охват охват having the possibility of circumferential movement, and in the dawn between the outer surface of the segments and the inner surface of the adjusting sleeve, a ribbon is placed, one end to Torah is fixed on cenepaTo-j in D, and others) is passed through the slot and the control sleeve in the gap that serves mezhpu latter and the housing. .

Description

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The invention relates to a sealing technique and can be used in compressors, pumps and hydraulic compressor units.

A shaft seal is known, comprising a housing with a soil book in which a sealing element is placed, covered by an elastic chamber and pressed against the shaft by pressure C 1

The disadvantage of such a seal is low reliability, since the hydraulic connections on the pump – oil seal line have a pressure drop due to leaks, which causes a decrease in pressure in the elastic chamber, and consequently, a leakage of the oil seal. A shaft seal is known, which contains a stuffing box, which has the possibility of circumferential movement, a gasket placed in it with a pressing element in a flat spiral spring, and an end cap, with one end of the spring fixed in the stuffing box and the other end on the end cap. 21.

The disadvantage of this device is that it does not ensure uniform compression of the gasket around the circumference, which reduces the reliability and durability of the seal.

The closest to the proposed technical essence and the achieved result is the stuffing shaft seal, comprising a housing, radially movable segments enclosed in a separator, covering the stuffing box packing, and a packing box SZ.

The disadvantage of this construction is that the radial compression of the packing by segments is carried out using

several screws that does not provide even reduction. As a result, uneven packing wear occurs, which leads to a decrease in the reliability of the seal.

The purpose of the invention is to increase the reliability and durability of the seal by uniformly distributing the compressive compression force.

This goal is achieved by the fact that, in a device comprising a housing, radially movable segments enclosed in a separator, covering the gland packing and the back block, are placed between the housing and the segments

a sleeve with a slot, having the possibility of circumferential movement, and in a viewer, between the outer surface of the segments and the internal surface of the adjusting sleeve

placed tape, one end of which is fixed to the separator, and the other passed through the slot of the adjusting sleeve and placed in the gap between the latter and the body.

FIG. 1 shows a seal, cross section; in fig. 2 is a sectional view in FIG. one.

The packing shaft seal 1 comprises a housing 2, a packing follower 3, a stuffing box 4, which is pressed against the shaft 1 by segments 5, which are enclosed in a separator 6. An adjusting sleeve 7 is installed between the segments 5 and the housing 2, having the possibility of circumferential movement. Through the slit 8 of the adjusting sleeve 7, a tape 9 of durable material (for example made of steel) is passed, covering segments 5 and fixed at one end on the separator 6. The other free end of the tape 9, located in the cavity between, the sleeve 7 and the body 2, forms its margin for implementation of additional compression during adjustment.

When assembling the stuffing box, the tape 9 is fastened at one end on the separator 6 and is fully wound onto it. The separator 6 with the tape 9 is inserted into the adjusting sleeve 7, through the slit 8 of which is pulled and wound onto the sleeve 7. Then the separator 6 with the tape 9 and the sleeve 7 is placed into the housing 2, which is attached to the separator 6. The slots of the separator 6 are placed into segments 5 and assemble the packing gasket rings 4. The assembled assembly is mounted on the shaft 1, after which the preload of the gasket 4 is pre-compacted by the string pack 3 and then crimped with tape 9.

Seal works as follows.

As the gland packing 4 is worn, its uniform compression along the length is performed by radially movable segments 5 when the tape 9 is filled with a cavity between the segments 5 and sleeve 7 by rotating the sleeve 7. This ensures uniform compression of the packing and, consequently, the reliability of the seal.

The technical and economic efficiency of the invention is to increase the reliability of the proposed gland packing, due to the fact that when the tape is compressed, the force of pressing the packing is evenly distributed

310166004

to the surface of the shaft, and then, to its filling due to uniform uniform wear, as well as a coarse force to press the packing to tee by reducing the wear of the packing shaft.

Claims (1)

OIL SEALING SHAFT SEAL, comprising a housing, radially movable segments enclosed in the separator, covering the stuffing box and packing follower, characterized in that, in order to increase the reliability and durability of the seal · by evenly distributing the packing compression force, an adjustment sleeve with a slot is placed between the housing and the segments having the possibility of circumferential movement, and in ¹ gap 'between the outer surface of the segments and the inner surface of the adjusting sleeve there is a tape, one end of which mounted on the separator, and the other is passed through the slot of the adjusting sleeve and placed in the gap between the last case. . ·