| 摘要 |
A pump (200) comprises a driving rotor (202) and a driven rotor (203) that are positioned in a housing (199) such that, as the driving rotor and the driven rotor rotate, the teeth (223a) of the driving rotor and the teeth (223b) of the driven rotor mesh to form a positive displacement seal (196,198). The teeth of the driving rotor and the driven rotor are configured such that seals between the inlet side (210) and the discharge side (211) of the pump are formed between only the leading surfaces (208) of the teeth of the driving rotor and the trailing surfaces (209) of the teeth of the driven rotor. |
