| 摘要 |
<p>The invention concerns a variable-delivery vane pump comprising a body (1) having a cavity (2) wherein a mobile ring (3) can move inside which is a hub (4) rotatable about a fixed axis (R) and provided with vanes (5) which during rotation are supported against the inner surface of the mobile ring (3), and displacing means for moving the mobile ring (3), in accordance with a control pressure, between a position centered on the axis of rotation of the hub and a predefined extreme eccentric position relative to the axis of rotation (R) of the hub (4). The means displacing the mobile ring (3) comprise a control recess (10) provided in the wall of the cavity (2) of the body (1) and a projection (9) formed on the outer surface of the ring (3) designed to slide in the control recess (10) of the cavity (2) of the body (1) so as to form a control chamber wherein is applied the control pressure.</p> |
