Aktiebolaget Skf

Björn Pettersson

Mats Johansson

Filip Rosengren

A pressure compensating device or arrangement for a roller arrangement which includes a central, non-rotating shaft provided with spaced apart bearings positioned adjacent opposite axial ends of the shaft and rotatably supporting at least one tubular roller segment, and where sealing arrangements are provided outside the bearings for sealing off the space inside the bearings and between the shaft and the roller segment towards the environment. The pressure compensating device includes a longitudinal bore extending from one end of the shaft and through at least a part thereof, with the bore communicating with the space between the sealing arrangements via channels. The bore is provided with a flexible member preventing direct communication between the exterior and the space between the sealing arrangements.

Pressure compensating device for a roller

The invention refers to a pressure compensating device () for a bearing housing, which is incorporating a sealed off compartment, and which device is intended to compensate pressure variations in the sealed off compartment, wherein the device () incorporates a housing (), in which is positioned a bellows () of flexible material, which housing () has at least one first opening () through which the interior of the bellows () communicates with the side of the bearing housing where a varying pressure can be expected, and wherein the bellows () further is associated with an additional opening (), adapted to allow the bellows () to alter its momentary form for compensating such pressure variations.

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Vallda, Sweden

Björn Pettersson