International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

This article presents the design of an experimental setup developed to investigate the influence of the auger rotation speed, the height of the lifted soil, and the radius of curvature of the flexible screw-type sectional working body on the torque at the drive shaft during soil transport from the center of a pit. Based on the conducted research, corresponding regression equations and response surfaces were constructed to study the influence of the screw rotation speed, the lifting height of the excavated soil, and the radius of curvature of the flexible screw-type sectional working body on the torque value on the drive shaft during transportation. Analysis of the presented regression equation shows that the dominant factor influencing the torque value is the material lift height h. The radius of curvature R of the flexible screw sectional working body also significantly influences the change in torque. The least influential factor is the rotational speed n of the working body.

The article presents, based on research into the impact of military operations on agricultural soils, the design of a flexible screw sectional working body, which will allow to increase the functional and operational characteristics of screw conveyors during the disposal of the removed contaminated soil layer. For the research, an experimental setup was developed and manufactured, with the help of which the torque on the drive of the flexible screw conveyor was determined. Based on the results of the research, graphical dependences of the change in the value of the torque Т on the frequency of rotation of the drive shaft of the working body n, on the radius of curvature Rк of the technological line and on the height h of movement when the technological line is completely filled with loose cleaned damaged soil from the middle of the crater are constructed. The obtained research results make it possible to choose the optimal design, kinematic and technological parameters of the developed screw sectional working body for transporting loose cleaned damaged soil from the middle of the crater.

The article presents the design of a finger safety clutch with axial withdrawal of a jammed screw to remove it from the overload zone. The theoretical dependences of determining the change in torque during the operation of the finger safety clutch on the angle of relative rotation of the half couplings and the design and technological parameters of the engagement elements are presented. On the basis of force and kinetostatic analysis of the coupling, the nature and magnitude of the change in their torque at all stages of relative rotation of the coupling halves were determined. The developed and manufactured prototypes of the finger safety coupling made it possible to conduct a set of experimental studies. For the safety clutch of a screw conveyor, based on the analysis of theoretical and experimental test data, the adequacy of theoretical calculations and actual values of torques during the mechanism operation was compared.

The article presents a scheme of a new combined screw conveyor, which makes it possible to improve the performance of conveyors. To eliminate the identified disadvantages in the operation of flexible screw conveyors, new types of sectional working bodies hinged to each other have been developed, which will increase the reliability and durability of conveyors.

The paper presents the constructions of finger safety clutch of screw conveyor, as well as the developed laboratory installation for conducting experimental studies in determining the optimal parameters and modes of operation of screw conveyor at overloaded working body. The results of experimental studies of the finger safety clutch are given, which allow to estimate the intensity of influence of this or that parameter on the torque value at different stages of its operation.