SU1255225A1 - Bearing unit for rolling mill roll - Google Patents

Description

The invention relates to rolling production and can be used in B structures, rolls, which use liquid friction bearings.

The aim of the invention is to increase the bearing capacity and resource of the reference node by optimizing the temperature and dc of the lubricating fluid.

Fig, 1 shows the reference node, a cross-section; figure 2 is the same, a longitudinal section; fig.Z - sleeve-liner, cross-section; 4 is the same longitudinal section (bottom view of the non-working area).

The rolling mill support assembly (ka consists of a pillow 1 with cavities 2 and 3 for supplying and discharging lubricating fluid, an insert bush 4 with pockets 5 and openings 6 connecting pockets 3 with cavities 2 for supplying lubricating fluid, an adapter bush pins 7 fixedly mounted with respect to the mill roll 8, the front 9 and the rear 10 covers with seals. In the non-working part, the insert bushing 4 is provided with two groups of grooves 11 and 12, which are made on the inner side and are located along the axis of rotation of the roll. groups are interconnected, When this group of grooves 11 and 12 are connected respectively with pockets 5 for supplying and removing lubricant. Poslednieskvoz nye grooves 13 serve for removing the heated oil in the crankcase one hydrodynamic bearing.

Support node pryatnogo roll works as follows.

When the roller 8 (fig. 1) rotates, the lubricating fluid supplied in the cavity 2 of the pressure cushion enters the pockets 5 of the liner sleeve 4 through the holes 6. A part of the lubricant E is absorbed by the rotating sleeve 7 in the bearing friction zone, the rest is lubricated with the inlet temperature comes under pressure with the same temperature along the grooves 14 and 15 into the first and second group of longitudinal grooves, the geometry of which is chosen taking into account the ps radiation of the turbulent flow regime in them in order to intensify the heat exchange between the heated sleeve th-pin and flowing in the grooves of the cooling lubricant. As the oil warms up (i.e. the sleeve-sleeve cools), it withdraws from the last KasiaBOK pass-through, thereby providing a continuous supply of lubricant with an inlet temperature (unheated) to the longitudinal grooves, where there is an intense heat exchange between the heated pin bushing and the cold oil

The heated lubricating fluid in the working area of the liner, which constitutes a small fraction of the total flow through the bearing, is mixed in the exit pocket with cold oil supplied from the oil system, as a result of which the oil is pumped into the second group of grooves to slightly exceed the oil temperature the entrance. The oil enters the first group of grooves with the inlet temperature, and when reversed - the other way round.

The proposed rolling mill support unit, in comparison with the known ones, due to the optimization of the thermal regime of a hydrodynamic underwater heater, significantly increases its reliability and durability. In addition, by effectively reducing the temperature of the axle bushing, conditions are created to increase the loading of the support unit, including at elevated rolling speeds and at a nominal load on the fluid friction bearing. Lowering the temperature of the axial sleeve will increase the durability of the main component of the anvil rolls.

FIG. 2

Fig.Z

And 11 / J / J 12 n I / -vV. L ///

1it

Editor G. Volkova

Compiled Y. mov

Tehred I. Veres Proofreader L. Patay

Order 4744 / 8Discount 518 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

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

Xt

Claims (1)

ROLLER ROLLING SUPPORT ASSEMBLY, comprising a pad with cavities for supplying and discharging lubricating fluid, a hydrodynamic bearing having an insert sleeve with an inoperative upper and working lower parts, between which there are pockets and holes for supplying lubricating fluid, a trunnion sleeve, front and rear lid, characterized in that, in order to increase the bearing capacity and resource of the support unit by optimizing the temperature of the lubricating fluid, the insert sleeve is made with two groups of grooves located and the inner side of the upper broken part and having mirror symmetry with respect to the axis of the rotation shaft ka, with each group consisting of a consecutive series of interconnected circumferential grooves with axes parallel to the axis of rotation _{with the} shaft-ka, and in each group of the first groove is connected to a number & a pocket adjacent to it, and the groove of the last row on both end parts has a cavity for draining the lubricant SU „„ 1255225