| 摘要 |
PCT No. PCT/CH93/00186 Sec. 371 Date Jul. 18, 1994 Sec. 102(e) Date Jul. 18, 1994 PCT Filed Jul. 23, 1993 PCT Pub. No. WO94/02303 PCT Pub. Date Feb. 3, 1994.A retruder (reverse extruder) (1) having at least one housing, with charging (10) and removal (11) ports, and at least two mutually meshing reversible screws (2, 3) running in opposite directions (12, 13) and conveying the medium at the same time in the direction (14) of conveying and in the reverse direction (15). The reversal of thrust reduces the axial bearing load ont he reversible screws (2, 3) and the pressure on the bearing seals. This makes it possible to increase the conveying pressure and to increase the frictional forces of such machines without reducing the service life and the availability thereof. |
