PL185033B1 - Multistage packing with ferromagnetic fluid - Google Patents

Abstract

A multi-stage gland seal with ferromagnetic fluid, containing a number of axially polarized magnets, characterized in that it consists of housings (1) made of a non-magnetic material in which permanent magnets (2) with a C-shaped cross-section are mounted, and the housings (1) are placed in a gland chamber closed with a gland (3), wherein in the gaps between the shaft (4) and the N and S poles of the magnets (2) there is ferromagnetic fluid (5), and in the housings (1) of the magnets (2), on the side of the gland chamber wall and on the side of the magnets (2) there are made seats for sealing rings (6) and (7), type "0" and channels (8) supplying ferromagnetic fluid and closed with plugs (9), and at the bottom of the gland chamber there is preferably an additional sealing ring (10).

Description

The subject of the invention is a multi-stage gland packing with a ferromagnetic liquid, used to seal rotary shafts of machines and devices operating under pressure in a gas environment or in high vacuum conditions.

A multi-stage ferromagnetic seal is known from the English patent description No. 2,130,662, which consists of a series of axially polarized permanent magnets and multi-edge pole pieces placed between them, mounted in a stuffing box. There is a ferromagnetic liquid in the radial gaps between the surfaces of the multi-edge pole pieces and the shaft surface.

The essence of the multi-stage ferromagnetic gland seal with a series of axially polarized magnets is that it consists of housings made of non-magnetic material in which permanent magnets with a C-section are embedded, and the housings are placed in a gland chamber closed with a gland. In the gaps between the shaft and the N and S poles of the magnets there is a ferromagnetic liquid, and in the magnet mounts on the side of the stuffing box wall and on the side of the magnets there are 0-type sealing ring seats and ferromagnetic fluid supply channels and closed with plugs. An additional sealing ring is preferably arranged at the bottom of the stuffing box.

The use of permanent magnets with a C-section, axially polarized, made it possible to eliminate the pole pieces, i.e. simplify the structure.

The subject of the invention is shown in the embodiment in the drawing showing a multi-stage gland seal with a ferromagnetic fluid in cross-section.

The seal according to the invention consists of housings 1 made of a non-magnetic material in which axially polarized permanent magnets 2 with a C-section are embedded. Housings 1 are placed in a stuffing box closed with a gland 3. There is a ferromagnetic liquid in the gaps between the shaft 4 and the N and S poles of magnets 2 5. In the magnet holders 1, on the side of the wall of the stuffing box and on the side of magnets 2, there are seats for sealing rings 6 and 7, of the "0" type, and the ferromagnetic fluid supply channels 8 closed with plugs 9. At the bottom of the stuffing box, an additional sealing ring 10, made of, for example, graphite or braided rope can be placed.

185 033

185 033

Publishing Department of the UP RP. Circulation of 50 copies. Price PLN 2.00.

Claims (1)

Patent claim Multistage gland packing with ferromagnetic liquid, containing a series of axially polarized magnets, characterized by the fact that it consists of housings (1) made of non-magnetic material, in which permanent magnets (2) with C-section are embedded, and housings (1) are placed in stuffing box closed with a gland (3), where in the gaps between the shaft (4) and the N and S poles of the magnets (2) there is a ferromagnetic liquid (5), and in the magnet holders (1) (2) on the side of the stuffing box wall and on on the side of the magnets (2) there are 0-type seats for sealing rings (6) and (7) and channels (8) supplying ferromagnetic fluid and closed with plugs (9), and an additional sealing ring (10) is preferably placed at the bottom of the stuffing box ).