| 摘要 |
A mixing device is provided with a conical mixing vessel and with a mixing screw whose top end is rotatably suspended from a swivel arm, and whose bottom end at least in the radial direction of the mixing screw is supported in the vessel by means of a supporting element which is not connected thereto in the direction of rotation of the screw and which is suspended concentrically with respect to the mixing vessel, the bottom end of the screw and the supporting element being provided with cooperating surfaces which directly bear onto each other. In order to reduce friction between said surfaces, means are provided for making the supporting element rotate with such rotational speed that the cooperating surfaces of the supporting element and the mixing screw do not or do hardly slip with respect to each other.
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