| 摘要 |
<p>1. A controlled hydraulic servo-valve destined to transmit an order for positioning the mobile part (5) of a hydraulic receiver (2) and to verify the correct execution of this order, comprising a hydraulic distribution slider (24A), the displacement in translation of which provokes the connection of the receiver (2) with a source of hydraulic pressure and an outlet, said hydraulic distribution slider (24A) being fixed to a rod (25) which is free in translation along its axis and rotated by an electric motor (11) executing rotations of an angle which is proportional to the amplitude of the movement the mobile part (5) of the receiver (2) must carry out, the rod (25) being supplied with at threaded portion (31) meshing with a screw (32) which is fixed in translation along the axis of the rod (25), characterized in that said screw (32) is fixed to the shaft of a second electric motor (51) which is controlled by a detector (52) which elaborates a signal as a function of the displacement of the mobile part (5) of the receiver (2) so that said second motor (51) executes a rotation in the opposite direction of the rotation of the first motor (11), and of an angle which is proportional to the amplitude of the movement actually carried out by the receiver (2) during the execution of the given order.</p> |
