Slewing and Luffing Stackers

A traveling slewing stacker serves stockpiles to the left and right of the stockpile yard conveyor. Controlled remotely, it can build a stockpile in chevron, coneshell, or windrow stockpiling modes. This type of stacker i......A traveling slewing stacker serves stockpiles to the left and right of the stockpile yard conveyor. Controlled remotely, it can build a stockpile in chevron, coneshell, or windrow stockpiling modes. This type of stacker is the most versatile since it is able to slew from a stockpile to the other side of the yard conveyor and build equal stockpiles on both sides of the yard feed conveyor. The tripper is connected to the traveling stacker and serves to transfer material from the longitudinal stockyard conveyor onto the boom conveyor. The stacker consists of a rigid box girder design of a three-point system connecting to a slewable upper carriage design by way of slew bearing, slew gear and slew drive pinions. The upper carriage also has the box girder design and carries the boom pivot. The luffing motion is often done by hydraulic cylinder and counterweighted by concrete counterweight designed to slew and pass under the tripper car. Stackers and trippers are designed for variable speed travel and can be quickly relocated from one place of the stockpile to another. This machine can be operated in a manual mode, semi-automatic mode or fully automatic mode from a central control station.