| 摘要 |
An apparatus for unloading material such as chips or the like from the bottom of a silo, comprising a conveyer screw mounted on an annular frame which surrounds a central outlet orifice in the bottom of the silo, and which can be rotated about the central axis of the silo for swinging said screw along the bottom of the silo. The screw is also mounted for rotation about its longitudinal axis for conveyance of material to the outlet orifice. The rotation of the screw is effected by means of a motor which is mounted stationary independently of the rotating frame, and the power transmission takes place through a drive shaft extending along the central axis, and a countershaft which is mounted on the rotating annular frame and arranged parallel to but offset from the first shaft. The swinging motion of the screw is performed by means of a hydraulic device which is mounted at the outer end of the conveyer screw. The hydraulic device cooperates with the inner circumference of the silo and communicates with a stationary source of hydraulic motive fluid outside the silo, the hydraulic fluid passing through a bore in the drive shaft, through a flexible conduit between the upper end of the drive shaft and the inner end of the screw and through the screw itself. |
