| 摘要 |
The invention relates to a fluid-transfer device (16), including a rotor comprising two centrifugal wheels (20, 30), and a stator including a set of continuous axisymmetric return channels (50), channelling the fluid from the first wheel to the second wheel (30). Each of the return channels comprises, in series, a diffusing portion (52) which guides the fluid in a centrifugal direction, a bent portion (54) which redirects the flow of fluid in a centripetal direction, a return portion (56) which guides the fluid along a centripetal path, and then an outlet portion (57) formed in a first non-tubular part (62, 162), which guides the fluid towards the second wheel. In said channels, the diffusing portion (52) and the bent portion (54) are separate parts, and the diffusing portion is formed in a second non-tubular part (62, 163) secured to the first non-tubular part. The invention also relates to a method for manufacturing said device. |
