EP 2156056 A1 20100224 - METHOD FOR CONTROLLING THE PRESSURE OF A CONFINING FLUID IN A CONVEYOR AND A CONVEYOR FOR SUCH A METHOD
Title (en)
METHOD FOR CONTROLLING THE PRESSURE OF A CONFINING FLUID IN A CONVEYOR AND A CONVEYOR FOR SUCH A METHOD
Title (de)
VERFAHREN ZUR DRUCKREGELUNG EINES SPERRMEDIUMS IN EINER FÖRDEREINRICHTUNG UND FÖRDEREINRICHTUNG FÜR EIN DERARTIGES VERFAHREN
Title (fr)
PROCÉDÉ DE RÉGLAGE DE LA PRESSION D'UN FLUIDE DE BLOCAGE DANS UN DISPOSITIF DE CONVOYAGE ET DISPOSITIF DE CONVOYAGE POUR UN TEL PROCÉDÉ
Publication
Application
Priority
- EP 2008055075 W 20080425
- EP 07108274 A 20070515
- EP 08749736 A 20080425
Abstract (en)
[origin: US9303654B2] A method for the pressure regulation of a barrier fluid in a pumping device (10) is introduced, which includes a pump unit (11) with a shaft (12) and a pump housing (13), a drive unit (17), which is mechanically coupled to the pump unit and a shaft sealing arrangement (16.1, 16.2), which seals the pump housing (13) relative to the shaft (12). In the method, a pumping medium is pumped by means of the pumping device (10) and the barrier fluid is conveyed via a feed line (5.1, 5.2) to a common housing (18), in which the pump unit (11) and the drive unit (17) are arranged, in order to prevent a leakage of the pumping medium out of the pump housing (13). Additionally, the pressure of the supplied barrier fluid is increased when a pressure difference between the pressure of the supplied barrier fluid and a detected pressure of the pumping medium in the pump unit (11) falls below a pre-determined value. For this purpose a pressure reducing valve (1) for the differential-pressure is opened and the feed line is connected through to a source (3, 4) for the barrier fluid via the open valve, the pressure of which lies by more than the pre-determined value above the pressure of the pumping medium in the pump unit.
IPC 8 full level
F04D 29/10 (2006.01)
CPC (source: EP US)
F04D 29/108 (2013.01 - EP US); F04D 29/128 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
WO 2008138730 A1 20081120; AT E513134 T1 20110715; BR PI0811580 A2 20150804; BR PI0811580 B1 20191001; EP 2156056 A1 20100224; EP 2156056 B1 20110615; US 2012027564 A1 20120202; US 9303654 B2 20160405
DOCDB simple family (application)
EP 2008055075 W 20080425; AT 08749736 T 20080425; BR PI0811580 A 20080425; EP 08749736 A 20080425; US 59980808 A 20080425