초록 ▼

A bottom silo unloader is disclosed in which a tapered sweep auger has its inner end of largest diameter supported for rotation about a transverse vertical axis at the center of a silo so that it sweeps over the silo floor as it is also rotated on its longitudinal axis to feed material to a center-l

A bottom silo unloader is disclosed in which a tapered sweep auger has its inner end of largest diameter supported for rotation about a transverse vertical axis at the center of a silo so that it sweeps over the silo floor as it is also rotated on its longitudinal axis to feed material to a center-located hopper therebelow with which a discharge auger communicates. The outer smaller end of the sweep auger is spaced off the silo floor and unsupported other than through the driven inner end. In its specifically disclosed form the tapered shaft of the sweeper auger is composed of three equal length sections of constant diameter, the diameters of which are progressively increased from shaft section to shaft section in the direction of the supported inner end of the sweep auger. The helical flight about the shaft sections have a constant radial depth and related pitch so that the loading capacity of the sweep auger increases from a minimum on its unsupported outer shaft section to a maximum on its shaft section closest to the center of the silo.

대표청구항 ▼

In a bottom silo unloader having a sweep auger drivingly supported at its inner end for rotation about a transverse related vertical axis and for simultaneous rotation about its own axis, the improvement wherein the sweep auger comprises a series of helical flight bearing shaft sections of which the

In a bottom silo unloader having a sweep auger drivingly supported at its inner end for rotation about a transverse related vertical axis and for simultaneous rotation about its own axis, the improvement wherein the sweep auger comprises a series of helical flight bearing shaft sections of which the outermost shaft section has the smallest diameter and each succeeding shaft section in a direction inwardly therefrom has a larger diameter than the immediately preceding shaft section, and wherein the helical flights about each of the shaft sections all have the same radial depth, the loading capacity of the channels between the flights of each succeeding shaft section being larger than that to the preceding shaft section.