RU2393035C1 - Sealing device for rolling mill support - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: proposed device comprises bearing cover with seat for sealing collar that includes casing, radial and face jaws with working edges interacting with mating surfaces of rolling mill. Reliable contact between jaws wedges and roller radial and face surfaces, in change of roller friction surfaces position relative to collar jaws, results from that collar jaws are jointed to casing and can vary their position with respect to roller surface. Note here that angle formed by jaw with roller face surface makes 25-45°, that formed by jaw with roller radial surface makes 30-35°, while ratio between the lengths of radial and face jaws makes 1.1 -1.2.

EFFECT: longer life and efficiency due to maintenance of sealing properties during change of relative position of roller friction surfaces.

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 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 a rolling roll sealing device containing a bearing cover with a seat for installing a sealing collar, including a housing, radial and end lips with working edges interacting with the respective surfaces of the rolling roll (see patent RF No. 2169873, class 7 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 (prototype) 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.

The technical result of the proposed sealing device supporting the roll is to maintain the sealing properties of the cuff in the process of changing the relative position of the friction surfaces of the roll, increasing the durability of the sealing device, increasing efficiency.

The technical result of the proposed sealing device supporting the roll is achieved by the fact that the lip of the cuff is connected to the housing with the possibility of changing its position relative to the surfaces of the roll when they are contacted by the working edges, while the angle with the end surface of the roll is 25-45 °, and the angle with the radial surface of the neck the roll is 30-35 °, and the ratio of the lengths of the end and radial jaws is 1.1-1.2.

The claimed sealing device of the bearing of the rolling roll is shown in the drawings, where

- figure 1 shows the sealing device of the support of the rolling roll in the working position;

- figure 2 - position of the cuff in the working (preloaded) state;

In the pillow 1 with the bearing 2 of the rolling roll 3, a cover 4 is installed with a sealing collar 6 fixed therein by means of a clamping flange 5, which consists of a housing 7 and jumpers 8 and 9 of the end lip 10 and the radial lip 11 connected with it, having working edges 12, 13 in contact with the end surface A and the radial B of the surfaces of the roll 3. In this case, the working surface of the end sponge 10 makes an angle β = 25-45 ° with the end surface A of the roll 3, the working surface of the radial sponge 11 makes an angle α = with the radial surface B of the neck of the roll 3 30-35 ° ratio of the length D of the end jaws 10 to length E is equal to the radial jaws 11 of 1.1-1.2.

The operation of the device is as follows.

In the process, the end sponge 10, in contact with its working edge 12 with the end surface A of the roll 3, prevents the coolant from entering the bearing cavity 2, and the radial sponge 11, in contact with its working edge 13 with the surface B of the roll 3, prevents the leakage of grease from the bearing 2 Due to the fact that during the installation of the roll 3 its axial movements are possible, therefore, to compensate for them, the length D of the end lip 10 is 1.1-1.2 times longer than the length E of the radial lip 11, which is not changes its position Nia relative radial surface B. The angle α, formed by a sponge 11 having a radial surface B has a constant value equal to 30-35 °. A smaller value of the angle, taking into account this design of the cuff, does not provide sufficient pressing of the working edge to the contacted surface, a larger value of the angle leads to excessive preloading of the working edge, and therefore to its increased wear. The angle β formed by the sponge 10 with the end surface A during installation can be in the range of 25-45 °.

Thus, the proposed sealing device of the support of the rolling roll, containing a cuff with end and radial lips, connected to the housing with the ability to change their position relative to the surfaces of the roll when they are contacted by the working edges, while the angle with the end surface of the roll is 25-45 °, and the angle with a radial surface of the neck of the roll is 30-35 °, and the ratio of the lengths of the front and radial jaws is 1.1-1.2, allows you to save the sealing properties of the cuff when changing the position of the rubbing surfaces lk, increase the durability of the sealing device, increase its efficiency by ensuring guaranteed interaction of the working edges of the cuff with the surfaces of the sealing device.

Claims (1)

A sealing device for a support of a rolling roll, comprising a bearing assembly located on the neck of the roll, a cover covering the bearing, with a socket for installing a sealing collar including a housing, radial and end lips with working edges interacting with respective surfaces of the roll, characterized in that the lips the cuffs are connected to the housing with the possibility of changing their position relative to the surfaces of the roll when working edges interact with them, while the angle formed by the lip th with the end surface of the roll is 25-45 °, the angle formed by the sponge with the radial surface of the neck of the roll is 30-35 °, and the ratio of the lengths of the end and radial jaws is 1.1-1.2.

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