Paper presents feasibility study for verification of the hypothesis of improving the productivity of reload operations using screw conveyors with rotary casings. For this purpose, an experimental installation was developed and experimental studies were conducted. Research results fully confirmed the hypothesis. On the basis of a feasibility study of casing rotation in screw conveyors, the conveyor performance increased by 24%, with the conveyor capacity thereby increased by 4.5%. Due to the application of rational parameters of the screw conveyor with a rotary casing, overall economic factor was improved by more than 10%. To achieve the economic efficiency of reload operations using screw conveyors with rotary casings, the rotational frequency of the casing should range from 460 to 620 rpm.
Based on the power-saving technologies, the design of an installation for coiling elliptical screw workpieces is worked out. Theoretical dependences for determining power and structural parameters of coiling a screw profile workpiece (SPW) on the elliptical mandrel are developed with consideration of the material grade specification and the parameters of technological equipment. The dependences of the moment value of SPW bending to the elliptical mandrel on its rotation angle, thickness and width are defined. The challenge is to develop the progressive methods of manufacturing augers and their sub-type - L-shaped auger spirals (LSAS) with high precision geometrical dimensions Computer simulation of the tape workpiece winding process on ellipse mandrel with initial conditions, displacements, deformations and stresses that arising in the material of tape workpice after applying the simulated efforts to it, was shown. Given simulation showed ranges where maximum stresses of tension and compression arising in material of tape workpiece, and made it possible to determine the minimum radius of curvature during winding, which is advisable to take at least 20 mm.
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