Abstract
Methods of reducing the metal consumption and increasing the structural strength of screw devices through the use of tubular shafts with amplifiers in dangerous sections are proposed. The review of the study shows that the modernization of the design of horizontal machines with screw devices was previously carried out and there is a positive experience in the development of such structures. The configuration of the shafts of mechanical gears usually provides the necessary rigidity of the structure. The load part of such shafts is thickened, less loaded on the shank has a thinned configuration with a smaller volume of material assigned to it. Due to the use of a special annular bandage pressed onto the screw shaft, the composite shaft is reinforced, representing a solid structure of hollow cylinders interconnected by guaranteed tension. The reduction of metal consumption is ensured by reducing the mass of the shaft, only dangerous sections are reinforced with bandages, which makes it possible to significantly facilitate the design of screw devices and increase the energy efficiency of the machine as a whole.