| 摘要 |
The invention relates to a screw, a screw part and a method for converting movement of a fluid to a rotating movement of a screw. The screw comprises a series of screw parts, each screw part comprising at least one screw blade, wherein successive screw parts are coupled to each other by means of a coupling, wherein the screw blades of successive screw parts substantially connect to each other such that the series of screw parts forms a spiral-shaped screw. |
