Mounting for a rotating shaft with sealing ring

Abstract

The invention relates to a bearing (56a, 56b) for mounting a rotating shaft (76) comprising a bearing housing (60) with an opening for accommodating a shaft (76) to be mounted, an inwardly oriented peripheral retaining collar (74) arranged on the edge of the opening, a bearing bush (58) arranged in the bearing housing (60), and a sealing ring (72) arranged in the bearing housing (60) between the bearing bush (58) and the retaining collar (74), which sealing ring abuts the rotating shaft (76) in a sealing manner. According to the invention, the sealing ring (72) has a sealing lip (72c) angled away from the bearing bush (58), oriented axially and tapering to a point at its free end, which sealing lip forms a contact surface of the sealing ring (72) on the shaft (76) to be mounted. The invention can be used in particular in conveying devices for high-density materials, e.g. in a screw conveyor, in which the sealing of the bearing is to be guaranteed against a conveyed medium penetrating from outside.

Description

technical field [0001] The invention relates to a bearing for a rotary shaft and in particular to the sealing of such a bearing against intrusive dirt. Background technique [0002] Bearings of this type are used, for example, in conveyor systems for viscous materials, in which the bearings of screw conveyors that rotate are sealed against the intrusion of viscous material, but also in concrete pumps, where the In pumps, for example, a concrete pump valve (for example an S-pipe or a swing slide valve) is pivoted back and forth in the concrete tank by means of a shaft. [0003] High demands are placed on the bearings of such mechanisms in that although they are surrounded by the medium to be conveyed (eg silt, concrete, sand-water mixture, etc.), they must be robust and durable. Furthermore, there is usually a requirement for such bearings that no lubricant (for example oil or grease) can escape from the bearing into the medium to be conveyed. [0004] It is known from the ...

AI Technical Summary

Problems solved by technology

On the one hand in order to avoid the penetrating of the viscous material to be conveyed into the bearing, but also to prevent the lubricant necessary for the lubrication of the bearing from escaping from the bearing into the viscous material, since this may be undesirable depending on the viscous material being conveyed of

In addition, high demands are placed on the service life of the bearings of screw conveyors, since the replacement of bearings and possibly supported shafts also entails high time and expense

Furthermore, it is desirable that the bearings also provide a good seal when they show signs of wear after a certain period of use, so that the replacement of parts is postponed when wear occurs

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