SU1214965A1 - High-vacuum seal - Google Patents

Description

2, The seal according to claim 1, about t l and - with the fact that on the end surfaces of the shaped sleeve in the exit zone of said Canadians there are radial grooves filled with FIELD1 I.

3. The seal according to claim 1, characterized in that it provides

1214965

They are attached to the pins between which these balls are placed, thrust bushings and fastening means, while the inserts are mounted and fixed to the pole pieces through the thrust bushings by means of fastening with the possibility of adjusting their axial position.

The invention relates to a vacuum technician, in particular, to magneto-fluidic seals, applied by dp sealing mobile elements operating under reduced pressure.

The aim of the invention is to automatically supply ferromagnetic fluid (FML) to the zone sealed by using wicks and means of adjusting supports,

The figo shows the device section; on - node I in figure 1; FIG. 3 shows the connection of a shaped sleeve with a wick.

The high vacuum seal consists of KopiTyca 1, inside of which an annular magnet 2 is placed, seals 3 with which pole tips 4 are in contact, made in the form of one-and-a-half elastic shells, inside of which a shaped sleeve 5 is installed with surface and central grooves 6 and 7 that are co-wired between each other with an inclination in the side of the shaft 8 channels 9 "Surface grooves 6 are filled with porous wicks 10, in which there is a ferromagnetic fluid 11, fed into the sealing zone 12 through the internal groove 13 and the external groove 14 Channel 15, tube 16 with the supplying device of the permanent residence device 17. The shaft-contacting parts of the shells 18 have a tip 19 at the ends facing each other, and on opposite sides there are recesses in which the inserts 20 are placed on the pins 21 with balls 22 installed between them , secured by nuts 23, through thrust sleeves 24. Ring magnet 2, seals 3, shaped

sleeve 5 is clamped by pole lugs with the help of an adjusting nut 25 and ring 26 through shoes 27, having convex-concave spherical surfaces 28 and 29,

The device works as follows.

After filling the wicks 10 FMF

With the help of the feeding device 17, through the tube 16 and the channel 15, the FMF is squeezed into the zone 12, for which the shaft 8 is rocked or the pole pieces 4 are compressed.

Using the nut 25, through the rings 26 and the shoes 27, the sealing zone 12 is filled through the central grooves 7, 14 and 13 and the channels 99 connected to the surface

Mice 6. The FMJ is held in the wicks x 10 and when extruded through the channels 9 it concentrates on the tips of 19 cones of the shells 4 (as around magnetic concentrators

power lines), which ensures reliable sealing of the shaft 8 in its spatial movement and automatic feeding of this liquid during its evaporation. So

As pole lugs 4 are made with 3 x static, then with vibrations the tightness is not broken, at the same time the forces are perceived by the balls 22, the adjustable position of the pins 21 and the inserts 22. The magnitude of the compression of the insert 20 to the balls is provided by the nuts 23 through the bushes 24. the device with the housing is made with the help of seals 3 by pressing {sleeves 26 with the help of a nut 25.

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Compiled by S.Voronova Editor T.Parfenova Tehred A. Babinets Corrector M. Pojo

Order 897/49 Circulation 880 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Z-ZZ, Raushsk nab., 4/5

Branch ShSh Patent, Uzhgorod, st. Project, 4

fpus.3

Claims (3)

1. HIGH-VACUUM SEAL, containing an annular magnet, pole pieces made in the form of one-and-a-half facing towards each other, installed in the housing and forming a cavity in which the shaped sleeve is located, the ferromagnetic fluid supply source communicated through the shaped sleeve with the specified cavity, this on the pole pieces are balls in contact with the shaft, and between the pole pieces and the shaft there is a gap filled with ferromagnetic fluid, and a compression device, characterized in what, s. the purpose of the automatic supply of ferromagnetic fluid into the sealing zone, it is equipped with wicks installed between the pole, tips and end surfaces of the shaped sleeve, while the shaped sleeve has radial central grooves connected to the channels with its end surfaces: inclined towards the meeting of the pole pieces, moreover the radial central groove is in communication with the ferromagnetic fluid supply source. Fig. 1 with © © 1 2. The seal according to claim 1, characterized in that radial grooves filled with wicks are made on the end surfaces of the shaped sleeve in the exit zone of these channels. 3. The seal according to claim 1, characterized in that it is provided with bushings on the pins, between which the balls are placed, thrust bushings and fastening means, while the liners are mounted and secured to the pole pieces through thrust sleeves with fastening means with adjustable · Linings of their axial position.