Forming roll bearing seal

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

 

The invention relates to the field of rolling equipment, particularly to sealing devices of the working roll bearings, and can be used in sealing devices of bearings for machines and mechanisms.

Known here as the similar design of the sealing device supports mill roll, containing the bearing cover with the socket for the installation of the seal, comprising a casing, radial and mechanical sponge with working edges that interact with the respective rolling surfaces of the roll (see RF patent №2169873, CL F16J 15/32, 12.12.1998).

This sealing device supports mill roll allows you to ensure reliable sealing of the rubbing surfaces at a certain fixed position of the mechanical and radial surfaces of the roll.

A disadvantage of the known construction of the sealing device is that by changing the position of the rubbing surfaces of the roll relative to the jaws cuff latter is not able to provide their working edges reliable contact with the face and the radial surfaces of the roll.

Known constructions of sealing devices closest to the technical essence (prototype) is a sealing device supports mill roll, containing situated on the neck Valk the bearing unit and the nozzle with a groove in the end face, cover the bearing with a socket to install the seal, comprising a casing, and two sponges with working edges that interact with surfaces of the nozzle (see RF patent №2389573, CL 7 WW 31/02, 05.22.2009).

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

The technical result of the proposed sealing device supports mill roll is maintaining the sealing properties of the cuff during axial movement of the roll relative to the cuff, increase the durability of the sealing device, improving the efficiency.

The technical result of the proposed sealing device supports mill roll is achieved by the fact that the cuff is provided with a second radial sponge connected to the end of the body and interacting with its working edge with the inner radial surface of the groove of the nozzle, is made in the radial direction with the tab in contact with the surface for more sponges. The AOC is e in the outer surfaces of the nozzle - radial and mechanical, executed inclined.

Declared the sealing device supports mill roll is illustrated by the drawing, which in the example shown, the device supports mill roll having a significant axial movement.

The cushion 1 is set to a bearing 2, sitting on the neck of the roll 3, on which the nozzle 4 is made at the end of the longitudinal circular groove 5, the lid 6 is placed in it, the sealing lip 7, consisting of a body 8, a radial sponge 9 with the working edge 10 that communicates with the radial surface 11 of the nozzle 4, and the second radial sponge 12 connected to the end of the body 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 is made protrusion 15 in contact with the inner surface of the sponge 12. The outer surface face 16 and 17 radial - nozzles 4 are inclined.

The operation of the device is as follows.

In the process, the sponge 12, simultaneously contacting with the protrusion 15 and the working edge 13 with the surface 14 of the nozzle 4, creates an insurmountable obstacle to the penetration of coolant from the dross in the area of the bearing. Radial sponge 9, contacting its working edge 10 with the surface 11 of the nozzle 4, provides a window is athelney protection of the bearing 2 from the ingress of coolant from the dross. During installation of the roll 3 (especially section rolling mills) of the possible significant axial movement of the clamping sleeve 4 relative to the cushion 1 with the cover 6 and the sealing lip 7. When moving the roll 3 in one or the other extreme position of the jaws 9 and 12 will be in constant contact with their working edges 10 and 13, and the protrusion 15, contacting the sponge 12, creates an additional barrier for the penetration scale with the cooling fluid in the cavity of the bearing 2. Inclined end 16 and 17 of the radial surface of the nozzle 4 when the rotation creates a centrifugal force that repels the coolant from the dross from the friction zone.

Thus, the proposed sealing device supports mill roll allows you to maintain the sealing properties of the cuff by changing the position of the rubbing surfaces, to increase the durability of the sealing device, to increase its efficiency by creating additional barriers and to guarantee interoperability working edges of the cuff with the sealing surfaces of the device.

1. The sealing device supports mill roll, containing situated on the neck of the roll bearing unit and the nozzle for the end of the longitudinal circular groove, a cover enclosing the bearing, with a socket for installing a sealing mange is s, includes case, radial sponge with a working edge that interacts with the radial surface of the nozzle, characterized in that the cuff is provided with a second radial sponge connected to the end of the body and interacting with its working edge with the inner radial surface of the groove of the nozzle, is made in the radial direction with the tab in contact with the surface for more sponges.

2. The sealing device supports mill roll according to claim 1, characterized in that the outer end and a radial surface of the nozzle is made inclined.



 

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