| 摘要 |
<p>A fluid meter (10) including a unit (12) for measuring the fluid volume passing through said meter and a repulsive magnetic drive consisting of a driving portion (26) connected to said measuring unit, and a driven portion (44), both of said portions being located opposite one another and rotatable about an axis XX'. During normal operation, the motion of the driving portion (26) rotates the driven portion (44). The driven portion (44) is movable along said axis, and when said driven portion does not follow the motion of the driving portion (26), it is subjected to variable axial magnetic repulsion forces from said driving portion, which forces act to space it apart therefrom. In the spaced-apart position, the driven portion (44) is acted upon by a resilient member (60) that, when bent, urges said driven portion towards the driving portion, whereby the driven portion is alternately subjected to opposite forces until it reaches the same rotation speed as the driving portion.</p> |
