IMPROVEMENTS IN DRY PUMPS

A screw pump comprises a pair of rotors (92, 94) each carrying an external screw thread (96, 98), the pair of rotors being rotatably mounted in a stator (72) and arranged such that, in operation, the screw threads of the rotors intermesh as the rotors rotate in opposing directions. Means (100, 102)...

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Bibliographische Detailangaben
Hauptverfasser:	MCDIARMID, ALLAN, EDMISTON, TUNNA, CLIVE, MARCUS, LLOYD, TOMKINS, MARK, EDWARD
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING HEATING LIGHTING MECHANICAL ENGINEERING POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS WEAPONS
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Beschreibung
Zusammenfassung:	A screw pump comprises a pair of rotors (92, 94) each carrying an external screw thread (96, 98), the pair of rotors being rotatably mounted in a stator (72) and arranged such that, in operation, the screw threads of the rotors intermesh as the rotors rotate in opposing directions. Means (100, 102) are provided for actively controlling the axial position of the rotors within the stator during use of the pump. L'invention concerne une pompe à vis comprenant une paire de rotors (92, 94) comportant chacun un filet de vis extérieur (96, 98), cette paire de rotors étant montée rotative dans un stator (72) conçu de sorte qu'en cours de fonctionnement, les filets de vis des rotors s'engrènent lorsque les rotors tournent dans des sens opposés. On utilise des moyens (100, 102) pour commander activement la position axiale des rotors dans le stator pendant l'utilisation de la pompe.