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2015, № 1 (176)

Panov E.I., Polischuk V.Y., Khanin V.P. THE IMPROVEMENT OF THE TENSION OF THE WOOD SAWDUST INTO THE EXTRUSION AREA OF THE PELLET-MILL WITH THE CIRCULAR DIEPellet-mills are widely used in the production of pellets from raw materials of vegetable origin. Starting from the 20-ies of the last century they were used for pressing feed, and lately they are used for pressing of wood sawdust. Because of this there are the problem of the optimal design of such working elements of the pellet-mills. The solution lies in to conduct identification and verification of mathematical models of the extrusion process in semi-pressing into the working elements of the pellet-mill. For one of the same models which describes the stress of the extruded semi-finished product on the contact surfaces of working elements: the circular die and the pressing roller, such a procedure was performed. Based on the results of the experimental determination of the normal to the surface of the pressing pellet-mill roller extrusion tension softwood sawdust with the humidity of 10% and identification of a mathematical model of the tension state of the semimanufactured material in the areas of the lag and lead wedge workspace of the pellet-mill was refined theoretical description of the tension state in the area of semi-finished extruded — distribution extrusion area normal tension and shear tension on the contact surfaces of the die and the press roller between which there is a differential dependence.Key words: The Reliability of the results was proved by the high value of the confidence factor of the approximation. This result allows to specify the force which are operating under the working elements of the pekket-mill with the circular die, and therefore to refine the calculations of strength and durability of the pressing mechanism.


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About this article

Authors: Hanin V.P., Polishchuk V.Yu., Panov E.I.

Year: 2015

Sergey Aleksandrovich

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