The work is aimed at studying the process of moving a single particle of bulk material in the vertical direction by a spiral-screw working tool of the conveyor and substantiating its technical characteristics. A single particle of granular material is considered the equivalent of a material point. A spiral-screw conveyor is used as a device for moving bulk material. The transportation process is carried out when the device is in a vertical position. The construction of this device implies that the drive of the working tool is located in the lower part, so that during operation the material is moved from the bottom to the top. When determining the parameters of the process of moving bulk material using a conveyor with a spiral-screw working tool, modeling using the d’Alembert equations is applied. These equations describe the steady flow of particles in a cylindrical coordinate system. The applied d’Alembert principle makes it possible to use static methods to solve problems of dynamics. For a mechanical system, you can write the equations of motion in the form of equilibrium equations. Such equations can be used to determine unknown forces, in particular, constraint reactions, as well as conditions acting on a single particle of bulk material being moved by a transport device. The particle, when moving, directly interacts with a complex system that includes: a fixed inner part of the outer casing generatrix; a fixed outer part of the inner cylinder generatrix; a movable spiral-screw working tool with certain geometric parameters (the wire diameter of the spiral, the spiral pitch, the average diameter of waps).
The article is devoted to the study of the corrosion process rate of steel parts in livestock and poultry buildings, primarily, dung removers, which are operated and exposed to a chemically aggressive environment. The issues of metal loss of parts which are in contact with waste products of cattle, pigs and poultry are considered. The results of the influence of corrosion processes on loosening torque increase of the threaded joints of dung removing equipment for livestock and poultry farms are also presented. The research results can be used in design and repairs of farm dung removers.
The article describes the functional relationship between the geometric parameters of the spiral screw and the kinematic motion characteristics of the material being moved and its individual particles. The authors considered the movement of a particle in the cylindrical system of coordinates. Differential equations have been obtained, which describe the motion trajectory of a material particle along the inner surface of the casing of a spiral–helical device.
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