SU1117098A1 - Support unit of rolling-mill roll - Google Patents

Abstract

SUPPORTING UNIT OF A ROLLING ROLL, containing a cushion with cavities for supplying and discharging a lubricating fluid, hydrodynamic bearing, the sleeve sleeve of which has pockets and holes for supplying a lubricating fluid, a bush-sleeve, front and rear ears, so as to of the operability of the support unit, the sleeve-liner is equipped with throttles with channels connecting the pockets of the liner sleeve with one and / or two cavities for draining lubricating fluid, the throttles being located symmetrically along both st oronam relative to the axis of rotation of the roll. (L 00

Description

I The invention relates to rolling production and concerns the design of stands using fluid-friction bearings. A rolling mill support assembly is known, comprising a cushion, a hydrodynamic podshpnik installed therein and means for supplying and discharging the lubricant LI. The disadvantage of this assembly is due to insufficient removal of heated the process of operation of the lubricating fluid, which leads to a decrease in the allowable sliding speeds and bearing load capacity. Closest to the proposed technical essence and the achieved result is the support assembly of the rolling roll, which contains a cushion with cavities for supplying and discharging lubricating fluid, a hydr dynamic feed, and an insert, which has pockets and openings for supplying lubricant, and a sleeve. pin, front and rear covers 23. However, during operation, the bearing is heated, the lubricating fluid is not completely removed through the pocket of the insert bush, and partially grabs with the pin sleeve and is inserted into the pocket L supply of lubricating fluid, which leads to a higher temperature of lubricating fluid. Increasing the temperature of the lubricating fluid in the working gap reduces the durability of the bearing and the reliability of its operation, since the permissible load and sliding speed are reduced. The aim of the invention is to increase the operability of the support assembly. This goal is achieved by the fact that in the rolling mill support unit containing a cushion with cavities for supplying and discharging a lubricating fluid, a hydrodynamic bearing, the liner sleeve of which has pockets and holes for the supply of lubricating fluid, a pin bushing, front and rear the covers, the sleeve, are provided with chokes from channel No. 1 connecting the sleeves of the sleeve into one and / or two cavities to drain the lubricating fluid, and the throttles are symmetrically arranged on both sides relative to the axis of rotation of the roll. 8 In FIG. 1 shows the proposed mill support assembly, cross section; in fig. 2 - the same lengthwise incision; in fig. 3 - sleeve insert, - longitudinal section; in fig. 4 - the same, end view; in fig. 5 is a section A-A in FIG. 4. The rolling mill support assembly comprises a cushion 1 with cavities for supplying 2 and discharging 3 lubricating fluid, a liner-insert 4 with pockets 5 and 6 and openings 7 connecting pockets 5 and 6 with cavities 2 for supplying lubricating fluid, an axial bushing 8 fixedly mounted with respect to the mill roll 9, the front 10 and the rear 11 of the sealing caps. The insert bush 4 is provided with throttles 12 connecting the pockets 5 and 6 to the cavities for draining the 3 lubricating fluid, and the throttles can be made so that the pockets mentioned can only be connected to one cavity 3. The direct connection of the pockets 5 and 6 with cavity 3 of the poop (through channels 13 and / or equivalent holes 14). The support unit works as follows. When the roller 9 rotates in the direction indicated by the arrow in Fig. 1, the lubricating fluid supplied in the cavity 2 of the cushion 1 under pressure, through hole 7 pic stubs into pockets 5 and 6 of sleeve 4. Part of the lubricant is caught by the rotating sleeve 8 in the bearing friction zone, the remaining lubricant enters the gap 15 and flows out through the ends of the bearing. The lubricating fluid is heated, the working gap has passed partially into pocket 6. the bushings of the liner 4 and partly into the pocket 5. In these kia mans, the heated lubricating fluid is intensively mixed with the re-flowing due to the intensive circulation of the lubricating fluid in pockets 5 and 6, which is facilitated by throttling lips 12. Displaced lubricating fluid is discharged from pockets 5 and 6 through throttling devices 12. The amount of loose liquid discharged from pockets 5 and 6 and 4 is regulated by throttling devices 12.

Changing the direction of rotation of the roll to the opposite to ensure the conditions of reverse rolling can occur at any time, since this does not require additional alterations in the structure. As the working surface of the insert bushing A is worn, its turn is 180

The proposed constructive implementation of the reference node for rolls, rolling mills allows to increase

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his performance. This is achieved by improving the temperature regime by increasing the circulation of the lubricating fluid in the pockets of the liner bushing and improving the removal of the heated lubricating fluid from the working area of the hydrodynamic bearing. In addition, the bearing assembly process is simplified. The bearing is assembled in a single pattern, regardless of the direction of rotation of the roll.

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Claims (1)

ROLLER ROLLER SUPPORT ASSEMBLY, comprising a pad with cavities for supplying and discharging lubricating fluid, a hydrodynamic bearing, the insert sleeve of which has pockets and holes for supplying lubricating fluid, a spigot hub, front) and a rear cover, which is characterized in that in order to increase the operability of the support unit, the insert sleeve is equipped with throttles with channels connecting the pockets of the insert sleeve with one and / or two cavities for draining the lubricant, and the interconnectors are located symmetrically on both sides m relative to the axis of rotation of the roll. figure 1 1 1117098