RU2486977C1 - Forming roll bearing seal - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: forming roll bearing seal comprises bearing assembly fitted on shaft journal and adapter with circular groove at its end, bearing cover with sealing gland seat. Said sealing gland comprises case, radial sponge with working edge interacting with adapter radial surface. Reliable contact with adapter surface in changing the position of roll rubbing surfaces relative to gland sponges is ensured by furnishing the gland with second radial sponge connected with case end face and interacting by its working edge with adapter groove inner radial surface. Said adapter has ledge interacting with extra sponge.

EFFECT: higher reliability of seal.

1 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 construction of a sealing device for a support of a rolling roll, comprising a bearing cover with a seat for mounting a sealing collar, including a housing, radial and end lips with working edges interacting with the respective surfaces of the rolling roll (see RF patent No. 2169873, class F16J 15/32, 12/12/1998).

This sealing device supports the rolling roll allows for reliable sealing of the friction surfaces at a certain fixed position of the end and radial surfaces of the roll.

A disadvantage of the known design of the sealing device is that when changing the position of the friction surfaces of the roll relative to the lip of the cuff, the latter are not able to provide reliable working contact with the end and radial surfaces of the roll with their working edges.

Of the known designs of sealing devices, the closest in technical essence (prototype) is a sealing device for a roll support, comprising a bearing assembly located on the roll neck and a nozzle with a groove in the end face, a cover covering the bearing with a socket for installing a sealing sleeve including a housing, and two jaws with working edges interacting with the surfaces of the nozzle (see RF patent No. 2389573, CL 7 B21B 31/02, 05.22.2009).

A disadvantage of the known design of the sealing device (prototype) is that with significant movements of the roll relative to the cuff, the latter will have contact only with the radial surface of the nozzle, while a gap is formed between the end surface of the nozzle and the cuff, which is filled with water with scale, which significantly reduces the sealing cuff properties.

The technical result of the proposed sealing device supporting the roll is to maintain the sealing properties of the cuff during axial movement of the roll relative to the cuff, increasing the durability of the sealing device, increasing efficiency.

The technical result of the proposed sealing device for supporting the roll is achieved by the fact that the cuff is equipped with a second additional radial sponge connected to the end of the housing and interacting with its working edge with the inner radial surface of the groove of the nozzle, made in the radial direction with the protrusion in contact with the surface of the additional sponge. In addition, the outer surfaces of the nozzle - radial and end, made inclined.

The claimed sealing device of the support of the rolling roll is illustrated in the drawing, which shows as an example the device of support of the rolling roll having significant axial displacements.

In the pillow 1 there is a bearing 2 mounted on the neck of the roll 3, on which there is a nozzle 4 with a longitudinal circular groove 5 made at the end, a cover 6 with a sealing sleeve 7 located in it, consisting of a housing 8, a radial lip 9 with a working edge 10, interacting with the radial surface 11 of the nozzle 4, and the second radial sponge 12 connected to the end of the housing 8 and interacting with its working edge 13 with the inner radial surface 14 of the groove 5 of the nozzle 4. On the radial surface 14 of the groove 5 of the nozzle 4 there is a protrusion 15 activating with the inner surface of the sponge 12. Outer surfaces - end 16 and radial 17 - nozzles 4 are made inclined.

The operation of the device is as follows.

In the process, the sponge 12, contacting simultaneously with the protrusion 15 and the working edge 13 with the surface 14 of the nozzle 4, creates an insurmountable obstacle for the penetration of coolant with scale in the bearing area. The radial lip 9, in contact with its working edge 10 with the surface 11 of the nozzle 4, provides the final protection of the bearing 2 from the penetration of coolant with scale. During the installation of the roll 3 (especially on high-quality rolling mills), significant axial movements of the nozzle 4 relative to the pillow 1 with the cover 6 and the sealing collar 7 are possible. When the roll 3 is moved to one or the other extreme position, the jaws 9 and 12 will be in constant contact with their workers edges 10 and 13, and the protrusion 15, in contact with the sponge 12, creates an additional obstacle for the penetration of scale with coolant into the cavity of the bearing 2. Inclined end 16 and radial 17 of the surface of the nozzle 4 during rotation create t centrifugal force, which beats coolant with scale from the friction zone.

Thus, the proposed sealing device of the support of the rolling roll allows you to save the sealing properties of the cuff when changing the position of the rubbing surfaces, increase the durability of the sealing device, increase its efficiency by creating additional obstacles and ensuring guaranteed interaction of the working edges of the cuff with the surfaces of the sealing device.

Claims (2)

1. The sealing device of the support of the rolling roll, comprising a bearing assembly located on the roll neck and a nozzle with a longitudinal circular groove made on the end face, a cover covering the bearing, with a socket for installing a sealing collar including a housing, a radial lip with a working edge interacting with a radial surface nozzles, characterized in that the cuff is provided with a second additional radial sponge connected to the end of the housing and interacting with its working edge with the inner radial surface the surface of the groove of the nozzle, made in the radial direction with a protrusion in contact with the surface of the additional sponge. 2. The sealing device of the support of the rolling roll according to claim 1, characterized in that the outer end and radial surfaces of the nozzle are made inclined.