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AssigneeSiemens Aktiengesellschaft
InventorsBenedikt Bentele, Norbert Schmid, Siegfried Schonwald
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A liquid ring pump having a control disk interposed between the impeller housing and a cover provided with connecting stubs is disclosed. A seal is interposed between the cover and the control disk and pressed against the control disk by a supporting edge of the cover. The seal further has a central web separating the pressure and the suction spaces formed in the cover. The interior of the impeller housing is sealed from the exterior thereof at the edge resting against the control disk. Sealing at two spaced locations, i.e. at the edge of the housing and between the cover and the control disk, is accomplished with a one-piece seal in accordance with the invention by providing a cup-shaped seal which has at the free end of its circumferential wall a radially outward-extending bead which is pressed against the rim of the impeller housing by an edge of the cover which axially extends beyond the circumferential wall.
In a liquid ring pump comprising an impeller housing, a cover, a control disk interposed between the cover and the housing, and sealing means interposed between the cover and the control disk for sealing the cover and the disk and for sealing the interior of the impeller housing from the exterior thereof at the edge of the cover adjacent to the control disk, the improvement comprising a single cup-shaped seal interposed between the cover and the control disk for sealing the cover and the control disk and having at the free end of its circumferential wall a bead which extends radially outwardly, and the cover having a rim which extends beyond the circumferential wall, the seal being disposed to be pressed against the edge of the impeller housing by the rim of the cover.
Dependencies are inferred from the claim text.