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Difference between revisions of "Vertical Screws"
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[[File:Vertical screws.jpg|thum|right|Vertical Screws]] | |||
'''Vertical Screws '''are used in bulk material handling, like agriculture, or in unit handling, like manufacturing. They are well suited for applications where horizontal space is limited; or for large, heavy loads. | |||
A vertical screw conveys material upward in a vertical path. It requires less space than some other types of elevating conveyors. Vertical screw can handle most of the bulk materials provided there is no large lump. The maximum height is usually limited to 30m. | |||
A vertical screw consists of a screw rotating in a vertical casing. The top bearing for the screw shaft must be designed to stand against radial and thrust loads. A suitable inlet port at the lower end and a discharge port at the upper end of the casing are provided. Feeding a vertical screw conveyor deserves careful consideration. Most materials are fed to the [[Vertical Conveyors]] by a straight or offset horizontal feeder conveyor. The ideal operation of a vertical screw is to have a controlled and uniform volume of material feeding.Uneven feeding and start stop operation may adversely affect the performance of the vertical screw in terms of speed, capacity and horse power. | |||