| 摘要 |
A mass flow meter (10, 50, 130, 200, 300) comprising a housing (11) including a fluid inlet (4) and a fluid outlet (6, 36). The housing (11) defines a chamber (13) and a rotatable member (12A, 12B, 60A, 60B, 210A, 210B) is arranged in the chamber (13) so as to be rotatable about an axis (24). A momentum device (14, 15) is also arranged in the chamber (13) and connected to the rotatable member (12A, 12B, 60A, 60B, 210A, 210B) via a connection comprising a biasing element (9, 52) so as to be rotatable about the axis (24) and rotatable relative to the rotatable member (12A, 12B, 60A, 60B, 210A, 210B). A fluid path (34) in fluid communication with the fluid inlet (4) and the fluid outlet (6, 36) is provided. The fluid path (34) passes through both the rotatable member (12A, 12B, 60A, 60B, 210A, 210B) and the momentum device (14, 15). The fluid path (34) enters the momentum device (14, 15) at a radial distance r1 from the axis (24) and exits the momentum device (14, 15) at a different radial distance r2 from the axis (24). A torque provider (21, 56) may be coupled to the rotatable member (12A, 12B, 60A, 60B, 210A, 210B) via a shaft (8, 62) or gear member (58). |
