Rotary expansible chamber devices – Multistage – Interengaging rotary members
Patent
1990-05-29
1992-02-25
Vrablik, John J.
Rotary expansible chamber devices
Multistage
Interengaging rotary members
418 15, 418180, 418206, F04C 1818, F04C 2300
Patent
active
050908790
ABSTRACT:
A positive displacement, recirculating Roots-type rotary gas compressor which operates on the basis of flow work compression. The compressor includes a pair of large diameter recirculation conduits (24 and 26) which return compressed discharge gas to the compressor housing (14), where it is mixed with low pressure inlet gas, thereby minimizing adiabatic heating of the gas. The compressor includes a pair of involutely lobed impellers (10 and 12) and an associated port configuration which together result in uninterrupted flow of recirculation gas. The large diameter recirculation conduits equalize gas flow velocities within the compressor and minimize gas flow losses. The compressor is particularly suited to applications requiring sustained operation at higher gas compression ratios than have previously been feasible with rotary pumps, and is particularly applicable to refrigeration or other applications requiring condensation of a vapor.
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Roots DVJ Dry Vacuum Whispair Blowers, Dresser Industries Inc., Connersville, Indiana, Apr. 1982.
Vacuum Generation by Means of Roots Vacuum Pumps, Balzers Co., Hudson, N.H., May 1985.
Eklund William A.
Vrablik John J.
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