RU1277698C - Magnet-fluid bearing - Google Patents

Abstract

MILTI-LIQUID CUSHION, comprising an annular permanent magnet mounted in an integral housing and a ferromagnetic fluid, characterized in that, in order to increase the reliability of

Description

{The invention relates to a joint assembly and, in particular, to bearings of bearings lubricated by a ferromagnetic lubricant.

An object of the present invention is to increase the reliability of a subpine by improving the temperature conditions of a ferromagnetic lubricant.

Figure 1 shows a section of a magnetic fluid bearing; in Fig.2 V1ZD L subtype on the side.

The magneto-liquid bearing consists of a housing 15 made of ferromagnetic material, with annular magnetic circuits 2 and 3 of ferromagnetic material rigidly fixed in it and an annular permanent magnet-1 magnet 4. Magnetic circuits 2 and 3 have internal conical surfaces in which the bushings 5 and 5 are rigidly fixed 6, made of non-magnetic material with through HijiMH grooves 7 and 8, tapering to the center of the bearing, and the angle of inclination of the grooves 7 and 8 k to 9 of the ferromagnetic material is equal to the angle of inclination of the conical surface 2 and 3. magnntoprovodov ferromagnetic grease 10 fills the po-. cavity with bushings 5 and 6, grooves 7 and 8 and forms an excess volume held under the action of a nonuniform magnetic field at the periphery of the bearing,. . . The proposed magneto-liquid bearing operates as follows.

The magnetic circuit is formed by a permanent magnet 4, magnetic circuits 2 and 3, ferro-lubricant 10 and shaft 9. An inhomogeneous magnetic field in the friction contact area and grooves 7 and 8 is created due to the conical surfaces of the magnetic circuits 5 and 6, and the magnetic field energy is used very rationally, so K -iK Magnetic cores 2 and 3 with end faces, surfaces on both sides of the mating ring with a permanent magnet 4 and form a closed magnetic circuit, the magnetic flux of which is practically not scattered; it is scattered into the surrounding medium and closed through ferrosmazku 10 and the shaft 9 with retraction inhomogeneous magnetic field 10 in ferrosmazki zo.nu friction. The bearing is capable of perceiving alternating radial loads. When the shaft 9 rotates, thermal energy is generated due to forces in the frictional contact zone. Elemental volume AV located in

In the friction zone, it heats up, its magnetization decreases and it is pushed through the grooves 7 and B with gradient magnetic forces into the zone with a lower magnetic field intensity

those. to the peripheral zone of the bearing, where -Cools due to heat exchange with the environment. In this case, the magnetization of the ferrous lubricant increases and the elementary volume uV

w tilts in. field with great intensity, i.e. into the upper part of the grooves 7 and -8, it moves along the grooves 7 and 8, where as a result of constantly renewed thermomagnetic convection it enters the friction zone. The implementation of the cavity between the bushings 5. and 6 improves the dynamics of convection.

Ferro Grease Speed

.3 the grooves 7 and 8 are proportional to the magnitude of the field gradient component in the direction of motion of the layers of the lubricant 10. Therefore, the angle of inclination of the conical surfaces of the magnetic circuit. And the slope of the groove are chosen so that the direction of movement of the layers coincides with the direction of the magnetic field gradient.

Variable section of grooves 7 and 8

(slope angle 25-40) also improves the conditions of thermomagnetic convection of the lubricant 10, improves the continuity and ner, continuity of the flow of warm and cold layers.

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