| 摘要 |
PCT No. PCT/SE91/00219 Sec. 371 Date Nov. 25, 1992 Sec. 102(e) Date Nov. 25, 1992 PCT Filed Mar. 21, 1991 PCT Pub. No. WO91/14869 PCT Pub. Date Oct. 3, 1991.Screw pump of the type which comprises a rotatable screw (16) in a housing (11), the threads (20, 21) of which are partially in engagement with a rotatable sealing device (19). The screw area of the screw (16), that is, the thread groove (20) and thread root (21) of which are generated by a generatrix (22), which is a part of a circle arc, the circle of which is rotatable about an eccentric rotation axis (23), when the generatrix rotates about the shaft of the screw (24) and displaced along this with a velocity which is proportional to the rotational velocity of the screw. The sealing device (19) comprises at least one circular disc (25), the eccentric rotation axis (26) of which, being arranged transverse to the axis (24) of the screw, coincides with the rotation axis of the generatrix. |
