Globoid-worm machine with tapered screw clearance near high pres

Details Globoid-worm machine with tapered screw clearance near high pres Globoid-worm machine with tapered screw clearance near high pres

1983-01-11

1984-11-27

Smith, Leonard E.

Rotary expansible chamber devices

With mechanical sealing

Seal element between working member and cylinder

418195, F01C 124, F04C 2700

Patent

active

044848722

ABSTRACT:
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.

REFERENCES:
patent: Re30400 (1980-09-01), Zimmern
patent: 3632239 (1972-01-01), Zimmern

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