| 摘要 |
A vane for a displacement pump comprising a body (1), a profiled pumping chamber (2) defined within said body (1), and a rotor (4) rotatably mounted within said body (1), eccentric with respect to the pumping chamber (2) and carrying a vane (5) whose end portions slide against the inner surface (3) of the pumping chamber (2), characterized in that each operating end portion of the vane (5) is formed by a tilting tip (9) having a coupling means (11) articulated with respect to the vane body (5) and suitable for tilting within a limited field with respect to the vane body (5), the shape of the tip (9) and the allowed tilting field being such that the tilting tip (9) is applied against the inner surface (3) of the pumping chamber (2) when the vane (5) is rotated in a preestablished working direction (F1), and being such that the tip (9) is allowed to retract from the inner surface (3) of the pumping chamber (2) when the vane (5) is rotated in the direction (F2) opposite to the preestablished operating direction (F1). The invention also concerns a rotary displacement pump comprising at least a vane with tilting tips. |
