Abstract: A lubrication system for leading a lubricant from a lubrication unit to a point to be lubricated, the lubrication unit and said point being movable with respect to each other. The system comprises means for leading a quantity of the lubricant at predetermined intervals from the lubrication unit to the point to be lubricated. For reducing the demand for space, a fast coupler is provided for leading lubricant from the lubrication unit to the point to be lubricated. The fast coupler is arranged to be in a position allowing the flow when the lubrication unit and the point to be lubricated are interconnected and in a position preventing the flow when the lubrication unit and the point to be lubricated are detached from each other.

Abstract: The invention relates to a slide-ring seal which comprises a frame portion provided with connections for a sealing liquid and seal rings (4) provided with slide rings (5). Each slide ring (5) is thereby fastened in place by means of a shrinkage fit. In order to provide a better wearability and a better sealing effect, each seal ring (4) is formed by two ring portions (7, 8) which are fastened on each other by means of a radial shrinkage fit. The slide ring (5) is essentially L-shaped in cross-section so that the slide ring is provided with at least two supporting surfaces (9, 10) extending in parallel with the sliding surface. A radial clearance (11) is provided between the outer periphery of the slide ring (5) and the inner surface of the seal ring (4). The supporting surfaces (9, 10) of the slide ring (5) are supported on the seal ring (4), whereby the slide ring (5) is fastened on the seal ring (4) solely by an axial press fit.