| 摘要 |
A decanter type centrifugal separator includes a torque transmission mechanism with enhanced effect of absorbing a torsional vibration. The decanter type centrifugal separator (10) includes a bowl (20) having a cylindrical part (21), a conical part (22), a separated liquid discharge dam part (25), and a dewatered solid discharge port (26); a screw conveyor (40) disposed in the bowl (20) for axially conveying sedimentation solid, and arranged to be coaxial with the bowl (20) to be rotatable at a speed different from that of the bowl (20); a processed liquid feed means (15); a separated liquid discharge port (81); a solid discharge port (82); a drive means (71); and a differential gear unit (50) for generating a difference in speeds between the bowl (20) and the screw conveyor (40). A torque transmission mechanism (60, 61) includes an elastic damping member (67) for receiving a drive force transmission load on a torque transmission surface (66) of a joint flange part (62a, 62b) formed in a joint part (43) of a drive transmission shaft (51) as a source of torsional vibration generation on a side of the screw conveyor (40) between the differential gear unit (50) and the screw conveyor (40) in order to provide flexibility in a direction of rotation and an effect of damping the torsional self-excited vibration in small angles in forward and backward directions generated during transmission of drive force, thereby absorbing the torsional self-excited vibration of the screw conveyor (40) generated during conveyance of treatment substances due to a minute difference in speeds between the bowl (20) and the screw conveyor (40).
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