A seal construction for a centrifugal pump

A seal construction for sealing the impeller 2 of a centrifugal pump on the suction side 3 with respect to the pump housing 1 comprises a sealing means 7 between the impeller 2 and the pump housing 1, a pressure chamber 23 that is delimited by the pump housing 1, the impeller 2 and the sealing means...

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Bibliographische Detailangaben
Hauptverfasser:	CORNELIS ALBERT VAN DER NEUT, HASAN HUSEYIN BUGDAYCI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CYLINDERS ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT PUMPS PISTONS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS SEALINGS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A seal construction for sealing the impeller 2 of a centrifugal pump on the suction side 3 with respect to the pump housing 1 comprises a sealing means 7 between the impeller 2 and the pump housing 1, a pressure chamber 23 that is delimited by the pump housing 1, the impeller 2 and the sealing means 7. The pump housing 1 and the impeller 2 have a gap 24 between them via which the pressure chamber 23 is in communication with the discharge side 4 of the impeller 2. Pressurising means is connected to the pressure chamber 23 for forcing a liquid medium 21 into the pressure chamber 21 under excess pressure. The sealing means 7 comprise at least two lip seals 8, 9 positioned one after the other in the direction of the axis of the impeller 2, between which the lip seals 8, 9 the connection 20 for the pressurising means is located, the pressurised liquid 21 urging the lip seals 8, 9 into sealing contact with the sealing surface 17 of the shell 18.