RU2402395C1 - Seal of mill roll bearing - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy, particularly to mill roll bearing seals. Proposed mill roll bearing seal comprises annular cup packing fitted in bearing cover consisting of case with at least two working edges jointed to case by two jaws to interact with shaft journal. Said cup packing has at least two working edges jointed to case by two conical jaws to interact with cover groove inner surface. Cover has radial channels. Cover bottom part drain bore is made aligned with aforesaid radial channels.

EFFECT: good sealing properties, longer life.

1 dwg

Description

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

Known as an analogue is the design of the bearing sealing device (see "Application of rubber technical products in the national economy", Reference manual, Moscow, "Chemistry", 1986, p.90, Fig. 3.10. K) The device includes an annular cuff consisting of housing, at least two working edges interacting with the working surface of the shaft. The cuff with its body is installed rigidly in the lid, therefore, the axial movement of the cuff relative to the shaft can only be carried out within the limits determined by the shaft dimensions, and the cuff is worn along the working edges in contact with the shaft, which limits the capabilities of the device.

Of the known designs of sealing devices, the closest in technical essence (prototype), is a sealing device of a rolling roll bearing, comprising an annular sleeve installed in the cover, consisting of a housing with at least two working edges connected to the housing by conical lips and interacting with the neck roll (see RF patent No. 2063276, class B21B 31/02, 05.16.1994). This sealing device of the bearing of the rolling roll due to the elastic properties of the sponge allows to some extent compensate for the relative relative movements of the friction surfaces: the roll and cuffs.

A disadvantage of the known design of the sealing device (prototype) is that mutual displacements occur only between the cuff and the roll, which limits the capabilities of the device. In addition, during operation, the medium to be sealed, for example, water with scale, falling into the cavity between the working edges, ultimately penetrates into the bearing cavity, which leads to premature wear of the latter.

The technical result of the proposed sealing device of the rolling mill bearing is to expand the capabilities of the device by maintaining the sealing properties of the cuff under conditions of significant movements of the friction surfaces, increasing the durability of the sealing device and bearing.

The technical result of the proposed sealing device of the rolling mill bearing is achieved by the fact that the cuff is provided with at least two working edges connected to the housing by conical lips and contacting the inner surface of the lid bore, with radial channels made in the housing and in the lower part of the lid coaxial to the radial channels made through (drain) hole.

The claimed sealing device of the bearing of the rolling roll is shown in the drawing.

In the pillow 1 with the bearing 2 of the rolling roll 3, a cover 4 is installed with a ring seal 5 of the ring type, consisting of a housing 6, two conical lips 7 with working edges 8 interacting with the neck of the roll 3 and two conical lips 9 with working edges 10 interacting with surface 11 of the inner bore of the cover 4. The flange 12 at the end of the cover 4 is installed with the possibility of restricting the movement of the cuff 5 relative to the cover 4. In the housing 6 of the cuff 5 there are radial channels 13, and a radial through is made in the lower part of the cover 4 ( Livni) opening 14.

The operation of the device is as follows.

In the process, when moving the roll 3 in the axial direction, the cuff 5 contacts its working edges 8 with the surface of the neck of the roll 3, and the working edges 10 with the surface 11 of the cover 4. Moreover, depending on the degree of wear of the working edges 8, 10 and the size of the contact the pressure cuff can perform relative sliding both relative to the roll and relative to the cover, which allows to increase the range of movements, as well as to obtain more uniform wear of the contacted surfaces. In the case of penetration of the coolant 15 (for example, water with scale) into the inner cavity of the cuff 5, the fluid 15 flows through the channels 13 into the drain hole 14 of the cover 4. As a result, the penetration of the coolant into the cavity of the bearing 2 is completely prevented, significantly increasing its durability

Thus, the proposed sealing device of the rolling roll bearing allows preserving the sealing properties of the cuff under conditions of significant movements of the sealed surfaces, virtually eliminating the ingress of water into the bearing and, thereby, increasing its durability, and increasing the life of the cuff.

Claims (1)

A sealing device of a rolling roll bearing, comprising an annular cuff installed in the cover, consisting of a housing with at least two working edges connected to the housing by conical lips and interacting with the neck of the roll, characterized in that the cuff is made with at least two working edges connected to the housing by conical jaws and in contact with the inner surface of the lid bore, while the housing has radial channels and the bottom of the lid is aligned with the radial channels Alami made a drain hole.

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