Substantiation of the design parameters of the chipper pipeline for shredding logging waste

Abstract

The results of studies of structural parameters and working process of chip removal from the chipper, with the upper chipper ejection, through the chipper pipeline, consisting of five sections are presented. The operating principle of this method of chippings removal is based on using the kinetic energy of rotating blades, from which the particles, receiving a certain amount of it, are directed in a stream of mixture with air through the chippings pipeline into the transport container. The specified method has inherent disadvantages - not always a stable process of removal of the resulting chips, which does not allow to achieve effective operation of chippers with this design. It is established that the design features of the chipper chipper pipeline have a significant influence on the removal of these particles from the chipper shell, especially in view of the predominance of the fine fraction obtained as a result of chopping twigs, branches and tops. The very long length of the chipper pipeline, the specific geometric shape in its various sections, as well as the considerable height of the chip elevation, from 2 to 4 meters, from the disc knives to the outlet window, have a restraining effect on the movement of the chips and on the performance of the entire mechanism.