SU1253686A1 - Hydrostatodynamic bearing for rolling mill rolls - Google Patents

Description

FIELD OF THE INVENTION The invention relates to rolling production, in particular to the structures of roll mill support assemblies.

The aim of the invention is to increase the reliability and durability of the bearing.

Figure 1 shows the hydrostathodynamic bearing, longitudinal section; figure 2 - sleeve hydrostatic bearing; on fig.Z - section aa in figure 2; figure 4 - section bb in figure 2; on fig.Z - section bb In figure 2.

Hydrostrodynamic bearing consists of a sleeve-axle 1 mounted on a conical neck of the roll 2 and covered by a plug-in sleeve 3 placed in the housing 4. Axial loads are perceived by a rolling thrust unit 5 fixed by a nut 6. To prevent the working fluid from flowing out of the bearing, it is closed by the front 7 and the rear 8 of the seal with seals. The pipe 9 together with the channels 10 formed inside the sleeve-insert 3 connects the high-pressure cavity 11 of the working fluid to the working area of the insert-liner 3 via throttles 12. On the working surface of the insert-liner 3, starting from the throttles 12, annular grooves 13 are made extending along an arc of a circle with an angle C of 5-30 °. At H 30 °, leakage of working fluid and pressure drop in the working area of the bearing are possible.

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N ri

FIG. 2

five

0

five

0

five

Moreover, the annular grooves 13 are connected by longitudinal grooves 14 into a coil, which, together with the pin bushing, forms a capillary, creating a hydrostatic pressure field that balances the external load on the bearing. The capillaries are located from the ends of the liner insert at a distance of one-fourth of its length with a pitch equal to twice the width of the segment grooves.

The bearing works as follows.

When applying a hydrostatic lubricant to a non-rotating loaded bearing, it from channel 10 through throttle 12 enters the capillary formed by the grooves 13 and 14 and fills it to that length until the created hydrostatic pressure field balances the load that is in effect at the moment . The total length of the grooves corresponds to the maximum load on the bearing, depending on its size and

working conditions. I

Rotating bearing works

in the hydrodynamic mode, and the grooves having a small cross section in the transverse direction, slightly affect the hydrodynamic properties of the bearing.

The proposed design of a hydrostatic dynamic bearing as compared with the known ones makes it possible to increase its reliability and durability.

-one

l

fig.Z

73

(Reg. 5

With (: Y.L. tavitel ed Editor M.Kelemesh Tehred L.Serdyukova Proofreader M.Maksimishinets

Order 4663/13 Circulation 518 Subscription

VNIIPI USSR State Committee

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

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

HYDROSTATODYNAMIC BEARING FOR ROLLING ROLLS, comprising a housing, an insert sleeve, the working surface of which is connected through channels and chokes to a high-pressure cavity, a sleeve hub, front and rear covers with seals, characterized in that, in order to increase the reliability and durability of the bearing, the working surface of the liner sleeve is a series of parallel segmented grooves with an arc length of 5-30 °, connected by means of longitudinal grooves into spiral-shaped groups forming a capillary with a pin-axle, located from the ends of the liner at a distance of one fourth of its length with a step equal to twice the width of the segment grooves. Figure 1 1253686 A1