| 摘要 |
A rotary screw vacuum pump (10) comprises a housing (12) that has a lower pressure inlet region (14) and a higher pressure outlet region (16) and two intermeshing screws 18 disposed in the chamber and configured to cooperably rotate to compress a gas in working chambers formed between them and the housing while pumping the gas from the lower pressure inlet region to the higher pressure outlet region. The housing (12) has a least one liquid inlet (20) to admit a sealing liquid to seal the working chambers. The intermeshing screws (18) comprise Quimby-type screws. |
