Coupling between rotating sections of helicopter fluid valve

摘要

The coupling which connects a rotating driving part (10) and a rotating driven part (20) having a common rotational axis (1) has a pre-stressed leaf spring (30) with two free ends (31a,31b). These are each held by the driving and rotating parts. This spring engenders rotational couples of equal and opposite magnitude on the driving and driven parts. The free ends are each mounted so that, during rotation of the driving part relative to the driven part, one of the free ends (31b) can lift the driving part and the other free end (31a) can lift the driven part. The free ends are displaced relative to each other so that the distance between the free ends, and thus the pre-stressing of the elastic element, increases.