SU1401219A1 - Shaft seal - Google Patents

Abstract

The invention relates to a sealing technique and can be used to seal rotating shafts of machines and apparatuses operating: under pressure drop conditions. The aim of the invention is to increase the reliability of compaction by improving tS 1 of the lubrication conditions of the friction pair and creating a uniform volume-stress state in the stuffing wrap. an elastic-elastic ring 13 is installed, covering the gland packing 8. The bore 2, made in the housing 1, is filled with magnetic fluid, which is under the influence of the magnetic forces of a permanent magnet 14, installed on the yoke 3, through the holes 15 of the disk 10 and the stuffing box 8 enters the friction zone. Under the action of the force of the springs 4, the pressure of the medium being sealed, as well as the force generated in the radial direction by the elastic-elastic ring 13, the stuffing box gasket 8 is in a uniform volume-stressed state of sludge. c (L 17 15

Description

The invention relates to a sealing technique and can be used to seal rotating shafts of machines and apparatus operating under pressure drop conditions.

The purpose of the invention is to increase the reliability of the seal by improving the lubrication conditions of the friction pair and the creation of forces acting in the axial direction from the springs 4 and the pressure of the sealing medium, as well as from the force generated in the radial direction by an elastic ring 13 compressed by the pressure flange 11 by means of bolts 12, the stuffing box 8 is in uniform

the tribute in the stuffing box of the uniform volume-stressed state.

a good volume-tight state.

The drawing shows the seal section.

The seal consists of a housing 1 with a bore 2 made in it, filled with magnetic fluid, an axially movable sleeve 3, spring-loaded springs 4, relatively rigidly fixed to the shaft 5 by a screw 6 of the sleeve 7 and a stuffing box 8. The stuffing box 8 is placed between the projection 9 of the housing 1 , the holder 3 and the perforated disk 10, closing the bore 2 with a magnetic fluid.

which ensures its rigidity.

i

Under the action of magnetic forces created by the permanent magnet 14, the magnetic fluid from the bore 2 through the holes 15 in the disk 10 and the stuffing box 8, which is wetted by it, is drawn into the zone of the movable sealing contact of the friction pair (working gap), where during seal operation. Force of magnetic fluid suction in the zone

 the friction pair is increased due to the effect of the capillary effect and the hydV boring of the pressure flange 11, the static 25 pillar of the magnetic fluid with the possibility of axial bone,

move relative to the body

1 with the help of bolts 12, placed the presence of magnetic fluid in the working gap, held by the magnetic paroelastic ring 13, covering the presence in the working gap of magnetic fluid held by the magnetic polar 35

40

the outer surface of the gland 30 enhances the sealing effect of the packing 8. A permanent magnet 14 is mounted on the axially movable holder 3, a pair of friction is formed by the inner surface of the holder 3 and the end surface of the gland packing 8,

The disk 10 has holes 15 through which the bore 2 communicates with the stuffing box 8, the bore 2 is connected by a channel 16 with a vessel 17 filled with magnetic fluid,

The channel 18 is also made in the base of the housing 1; The axially movable holder 3 is fixed against rotation relative to the sleeve 7 with a pin 20,

The sealing of mobile and fixed joints is carried out by elastic elastic elements 21,

Seal works as follows.

45

50

compaction in general.

Claims (1)

Formula from. gaining A shaft seal containing a housing and a spring-loaded axially movable sleeve in contact with the gland packing, characterized in that, in order to increase the seal reliability, it is equipped with a permanent magnet mounted on the tube, perforated disk, elastic ring and pressure flange with a boring drilled in it, mounted on the housing with the possibility of axial movement, in the housing there is a boring filled with magnetic fluid and closed from the stuffing box with perforated dis ohm, and elastic ring placed in the bore of the pressure flange of the outer covering poverhnos- ti stuffing. which ensures its rigidity. i Under the action of magnetic forces generated by a permanent magnet 14, the magnetic fluid from the bore 2 through the holes 15 in the disk 10 and the stuffing box 8 that is wetted by it is drawn into the zone of the movable sealing contact of the friction pair (working gap), where it is held during seal operation. Force of magnetic fluid suction in the zone The presence in the working gap of the magnetic fluid held by the magnetic  increases sealing effect compaction in general. Formula from. gaining A shaft seal containing a housing and a spring-loaded axially movable sleeve in contact with the stuffing box, characterized in that, in order to increase the reliability of the seal, it is equipped with a permanent magnet mounted on the sleeve, a perforated disk, an elastic-elastic ring and a pressure flange with A bore drilled into it, mounted on the body with the possibility of axial movement, is bored in the housing, filled with magnetic fluid and closed from the gland packing by perforated dis com, and the elastic-elastic ring is placed in the bore of the pressure flange to cover the outer surface of the stuffing box.