| 摘要 |
A centrifugal pump used for conveying very thick and/or viscous materials and products which comprises a screw impeller of at least one start, of which the component blade, which is in the form of a helix (8) having a pitch which increases in the material feed direction, has a slightly conical outer profile, is wound on a highly conical core (5) smoothly joined to a base disc (6), and at its downstream terminal portion is twisted towards the core (5) to assume the configuration of a delivery vane (9) forming an acute angle with the disc (6) and disposed along a chord thereof, and supporting an overlying circumferential ring (10) which defines a closed delivery duct for the material. |
