RU2456106C1 - Sealing device of turning roller bearing - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: structure of the bearing rolls contains a bearing assembly and a nozzle located at the neck of the cylinder, the lid covering the bearing with a "П"-shaped radial collar, which includes a body, two sponges with working edges interacting with the outer surface of the nozzle. Maintaining integrity under condition of high pressure of lubrication is ensured owing to the fact that the outer surface of the nozzle is designed in the shape of stepped conical surfaces, the angles of which are directed to the bearing, and the angles of conical surfaces range from 30° to 60°. In addition, the sponge facing the bearing is made more rigid.

EFFECT: invention is intended to improve reliability of seal of the bearing rolls.

2 dwg

Description

The invention relates to the field of rolling equipment, specifically to sealing devices of bearings of work rolls, and can be used in sealing devices of bearing bearings of machines and mechanisms.

Known as an analogue is the design of the sealing device of the bearing of the rolling roll (see, for example, RF patent No. 2059903, class F16J 15/32, 03/29/1993). This sealing device comprises a cover with a sealing assembly located in it, including two cuffs, one of which, with its working edge, is in contact with the end surface of the roll, and the other with its working edge is in contact with the radial surface of the roll neck. The disadvantage of this device is that two cuffs are used to seal two surfaces, which makes it difficult to use in tight spaces.

Of the known designs of sealing devices, the closest in technical essence (prototype) is a rolling roll bearing used as a sealing device, containing a bearing assembly and a nozzle located on the roll neck, a cover covering a bearing with a U-shaped radial sleeve including a housing, two elastic jaws with working edges interacting with the outer surface of the nozzle (see RF patent No. 2063276, CL B21B 31/02, 05.16.1994).

This sealing device of the support of the rolling roll makes it possible to provide reliable sealing of rubbing surfaces in the presence of one compacted medium under a slight overpressure - up to 0.1 atm.

A disadvantage of the known design of the sealing device (prototype) is that if there is a lubricant with high pressure in the bearing area, the elastic lips of the cuff are not able to withstand the additional load and deviate towards the pressure, which leads to a loss of the sealing properties of the device.

The technical result of the proposed sealing device of the rolling mill bearing is the preservation of the sealing properties of the cuff in the presence of high pressure.

The technical result of the proposed sealing device of the rolling mill bearing is achieved by the fact that the outer surface of the nozzle is made in the form of a stepped cone with a taper angle in the direction of the bearing, while the angles of the conical surfaces are in the range from 30 ° to 60 °. In addition, the sponge placed closer to the bearing is made with greater rigidity.

The claimed sealing device of the bearing of the rolling roll is shown in the drawings, where Fig. 1 shows a device with elastic jaws of the same stiffness; figure 2 is the same device with elastic lips of different stiffness.

In the pillow 1 with the bearing 2 of the rolling roll 3 and the nozzle 4, a cover 5 is installed with a sealing U-shaped radial cuff 6 located in it, including two elastic lips 7, 8 with working edges 9 and 10 in contact with the conical surfaces 11, 12 of the nozzle 4 .

The operation of the device is as follows.

During operation, when the roll 3 is rotated together with the nozzle 4, the U-shaped collar 6 with its working edges 9, 10, in contact with the conical surfaces 11, 12 of the nozzle 4, prevents the leakage of the lubricant under high pressure from the bearing 2. The angles of the conical surfaces of the nozzle 4 are selected depending on the pressure level in the range from 30 ° to 60 °. In the case of a sufficiently high pressure in the area of the bearing, the elastic sponge 7 located closer to the bearing 2 is made with greater rigidity, for example, shorter than the sponge 8. Therefore, the main lubricant pressure is perceived by the first sponge 7 from the bearing 2, and the second sponge 8 by its working edge 10 permanently prevents leakage of grease from bearing 2.

Thus, the proposed sealing device of the bearing of the rolling roll allows you to reliably hold the lubricant under pressure in the bearing area due to the nozzle with a stepped cone, as well as due to the location of the sponge closer to the bearing with greater rigidity.

When rolling, for example, precious metals, it is not allowed to get grease and a cooling liquid roll on the surface of the rolled metal. Therefore, rolling is carried out “dry”, i.e. without lubricating-cooling fluid, and to the sealing devices of bearings increased demands are made.

Claims (2)

1. The sealing device of the rolling roll bearing, comprising a nozzle located on the neck of the roll, a cover covering the bearing with a U-shaped radial sleeve installed in it, including a housing and two elastic jaws with working edges interacting with the outer surface of the nozzle, characterized in that the outer surface of the nozzle is made in the form of a stepped cone with taper angles directed towards the bearing, while the angles of the conical surfaces are in the range from 30 ° to 60 °. 2. The sealing device according to claim 1, characterized in that the sponge placed closer to the bearing is made with greater rigidity.

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