RU2456103C1 - Seal device of turning roller support - Google Patents

Abstract

FIELD: machine-building.

SUBSTANCE: support device of turning roller comprises a bearing assembly and a nozzle, located on cylinder neck, a lid covering the bearing with a "П"-shaped radial comprising a body with two working edges that interact with the outer surface of the nozzle. Maintaining the integrity under condition of penetration into the device of different environments is ensured by the fact that the outer surface of the nozzle is made in the form of two divergent conical surfaces with the central vertex and the cone angle ranging from 15° to 45°, while the ratio of angles of conical surfaces is equal to 1.3…1.5 on either side of the nozzle.

EFFECT: reliability improvement of seal of the bearing rolls.

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 is the design of the sealing device of the support 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 the roll roll support used as a sealing device, comprising 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 with two working edges interacting with the outer surface of the nozzle (see RF patent No. 2063276, class B21B 31/02, 05.16.1994).

This sealing device supports the rolling roll allows you to provide a reliable seal of the rubbing surfaces in the presence of one sealed medium.

A disadvantage of the known design of the sealing device (prototype) is that it does not provide a seal against penetration of another medium into the device, both working edges are directed in one direction.

The technical result of the proposed sealing device of the support of the rolling roll is the preservation of the sealing properties of the cuff operating in the conditions of two sealed media, as well as the ability to change the pressing force of the working edges to seal different media.

The technical result of the proposed sealing device of the support of the rolling roll is achieved by the fact that the outer surface of the nozzle is made in the form of two multidirectional conical surfaces with the formation of large ends of the peaks, with cone angles from 15 ° to 45 °, while the ratio of the angles of inclination of the conical surfaces is 1.3 ... 1.5 to either side of the nozzle.

The claimed sealing device of a support of a rolling roll made using a liquid friction bearing is shown in the drawing, where Fig. 1 shows a sealing device of a support of a rolling roll.

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 cuff 6 located in it, including two working edges 7 and 8 in contact with the conical surfaces 9, 10 of the nozzle 4. The working edge 7 is directed to the seal coolant "O", the working edge 8 is directed to the seal lubricating bearing 2 fluid "C". In this embodiment, the ingress of coolant into the bearing 2, consisting, for example, of water with scale, is undesirable. Therefore, to ensure more reliable contact of the working edge 7 with the nozzle, the conical surface 9 facing the roll 3 is made with an inclination angle β greater than the angle of inclination α of the conical surface 10 facing the bearing 2. This ratio is 1.3 ... 1, 5, while the angles of the conical surfaces are in the range from 15 ° to 45 °. In the event that it is necessary to provide a more reliable seal from the outflow of grease from the bearing 2, the angle α is 1.3 ... 1.5 times greater than the angle β (not shown in the drawing). 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 7, 8, in contact with the conical surfaces 9, 10 of the nozzle 4, prevents lubricant “C” from flowing out of the bearing 2 on the one hand, and on the other hand prevents coolant “O” from entering the bearing 2. Depending on which medium it is more important to protect from the penetration of another medium into it, the angles of inclination of the conical surfaces 9, 10 of the nozzle 4 are chosen. When the cuff is operated with different contact forces at the working edges, their wear is distributed unevenly. Therefore, to increase the durability of the cuff, with obvious wear of a more loaded working edge, the cuff is turned 180 °. In this case, a less worn working edge is replaced by a more worn out one.

Thus, the proposed sealing device of the support of the rolling roll allows you to change the preload force of the working edges of the U-shaped cuff for two sealed media due to different angles of inclination of the nozzle, resulting in increased reliability of the device.

Claims (1)

A sealing device for a support of a rolling roll, comprising a bearing assembly and 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 with two working edges interacting with the outer surface of the nozzle, characterized in that the outer the surface of the nozzle is made in the form of two opposite conical surfaces with the formation of large ends of the cones of the top, with angles of inclination of the conical surfaces from 15 ° to 45 °, the ratio of the mentioned angle is 1.3 ... 1.5 on one or the other side of the nozzle.