SU1756706A1 - Magnetoliquid seal - Google Patents

Abstract

Use for sealing rotating shafts when transferring motions to gas or liquid media with increased pressure drop. Invention: a magnet assembly in the form of a magnet with pole pieces adjacent to its face surfaces is installed on one of the sealing surfaces. Working gaps zapolayy magnetic fluid. The caps of the non-magnetic material fit VK face ends of the tips. The bearing is made in the form of a sleeve of a non-magnetic material installed between the magnetic assembly and another sealed surface with the possibility of axial movement. The magnet-conductor is installed on the end surfaces of the sleeve and forms working gaps with the tip and the sealing surface. 2 Il.

Description

The invention relates to a sealing technique and can be used in the national economy to seal rotating shafts when transmitting motion to gas or liquid media with increased pressure drop.

The aim of the invention is to improve the reliability of the seal

FIG. 1 shows a sectional seal when installing a magnet assembly in a housing; in fig. 2 - the same on the shaft

The seal contains a magnetic unit in the form of a permanent magnet 1 with pole tips 2 and 3, adjacent1 to its end surfaces mounted in the housing 4 or on the shaft 5 a bearing in the form of a sleeve 6 of non-magnetic material mounted with the possibility of axial displacement between the magnetic node and compacted surface shaft 5 or

housing 4. On the end surfaces of the bushings 6, annular magnetic conductors 7 and 8 are mounted, which with the pole lugs 2 and 3 and the sealing surface of the shaft 5 or the housing 4, have working gaps 61.62.63.34 and (5 5.5 b or b7, 6v, respectively, filled with a magnetic fluid. The seal is equipped with caps-limiters 9 and 10, made of a non-magnetic material and adjacent to the end surfaces of the pole pieces 2 and 3. Magnetic force resulting from the interaction of magnetic fluids with a permanent magnet 1 pre tstvuet its leakage claim bd action of differential pressure. The magnitude of this force depends on the magnetic characteristics of the fluid and proportional to the gradient magnetic field. The axial movement of the shaft 5 does not affect the sealing performance due to installation of the sleeve 6 is axially

X1

 sl o

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oh oh

movement, which is limited by caps 9 and 10.

Claims (1)

Invention Formula A magneto-fluidic seal comprising a body mounted on one of the sealing surfaces of a magnet assembly in the form of a magnet with pole pieces adjacent to its end surfaces, a bearing and a magnetic fluid in the working gaps, in order to increase T 5 7 Editor T Kurkova Fig2 Compiled by A Beltsova Tehred M. Morgental reliability of the seal, it is equipped with caps of non-magnetic material adjacent to the end surfaces of the pole lugs, ring 5 magnetic cores, the bearing is made in the form of a sleeve of non-magnetic material installed between the magnetic assembly and the other sealed surface with the possibility of axial movement, and mag10 The nitropipe is installed on the end surfaces of the sleeve with the formation of working gaps with the pole pieces and the sealing surface. 9. 4. J L F 68 Figl F. 6. 8, 4. Proofreader And Shmakov