| 摘要 |
A pump comprising a housing 12 between inlet and outlet passages 14, 11, and a rotor 17 within the housing. The rotor includes a surface which engages with an interior surface of the housing to form a seal, and at least one shaped surface which is radially inward of the housing engaging surface so as to form a pump chamber between the rotor and housing. A seal is provided between the outlet and inlet passages, and is urged into engagement with the rotor. The outlet passage includes a second inlet 141 for passing a second fluid to the outlet passage, and a device downstream of the second inlet for mixing the fluid from the rotor with the fluid from the second inlet. The inlet and outlet passages, seal and housing may be formed as a one-piece moulding. An inner tube 144 may be provided coaxially within the outlet passage, with one fluid passing along the inner tube, and the other fluid passing between the inner tube and outlet passage. |
