ROTARY POSITIVE-DISPLACEMENT FLUID-MACHINE

A volumetric machine comprises a screw rotatable inside a casing and cooperating with at least one pinion-wheel. The screw has a low pressure end adjacent a low pressure port and a high pressure end adjacent a high pressure port, the high pressure end being provided with an annular sealing device su...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	AKIRA OHTSUKI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A volumetric machine comprises a screw rotatable inside a casing and cooperating with at least one pinion-wheel. The screw has a low pressure end adjacent a low pressure port and a high pressure end adjacent a high pressure port, the high pressure end being provided with an annular sealing device substantially preventing axial leakage towards a cavity maintained at the low pressure to reduce axial thrusts on the screw. The profile of the screw corresponds to that of the casing with a very small clearance, except in an area adjacent the sealing device where the clearance increases from the low pressure side towards the sealing device.