Axial thrust adjustment for dual screw-type pump

Details Axial thrust adjustment for dual screw-type pump Axial thrust adjustment for dual screw-type pump

1975-03-24

1977-04-12

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

By changing working member or cylinder relative position

418203, F01C 116, F01C 2100, F04C 110

Patent

active

040172236

ABSTRACT:
A dual screw-type pump is provided with a means for balancing the resultant dynamic axial thrust on the screw assemblies during operation of the pump. The resultant thrust on each assembly is absorbed in part by a circular piston on the assembly near the rear of the pump and the remainder by a thrust bearing engaged with the assembly near the front of the pump. The longitudinal position of one of the screw assemblies is selectively adjustable relative to the position of the other screw assembly to balance the thrust on the screw assemblies.

REFERENCES:
patent: 1218602 (1917-03-01), Holdaway
patent: 1323459 (1919-12-01), Dorr
patent: 1677980 (1928-07-01), Montelius
patent: 1751703 (1930-03-01), Long
patent: 2095168 (1937-10-01), Burghauser
patent: 2590561 (1952-03-01), Montelius
patent: 3057665 (1962-10-01), Zalis
patent: 3161349 (1964-12-01), Schibbye
patent: 3658452 (1972-04-01), Kita

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