Theoretical study of dynamic parameters of oscillating end-effectors of cleanser of a potato

Abstract

The purpose. To determine dynamic parameters of oscillating end-effectors of cleanser of potato, ensuring upgrading of cleanout of tubers from admixtures. Methods. Theoretical mechanics, higher mathematics and strength of materials. The program is made as well as numerical calculations on computer are carried out. Results. For the developed new construction of cleanser of potato of spiral type on the basis of consideration of geometry of curving of working spiral at its cross oscillations analytical dependences of change of walk of coiling of cleaning spiral as a result of its deformation, in particular simultaneous longitudinal tensioning and cross sag are gained. It has enabled to gain limitations on the maximum value of that deformation under condition of non-dropping out of tubers of potato through intra-coil space in view of constructive and kinematic parameters of cleaning spiral, its material, and technological operating conditions of separator. Execution of these conditions enables to considerably increase quality of cleanout of tubers of potato from the stuck soil and plant residues and is essential to diminish their losses. Conclusions. New analytical dependences are gained for determination of changed walk of arched spiral at any moment and for any intra-coil clearance during oscillating process, on the basis of which numerical calculations on the PC have been carried out. According to numerical calculations cleaning spiral at its angular velocity of twirl w = 30rad. · s–1, density of its material r = 7700 kg · m–3, elastic modulus E = 2 · 1011 Pa, radius of bar r=8,5 mm and uniformly distributed load of potato heap which intensity is equal to 1000 N · m–1, with initial walk of coiling S=48 mm at considered cross oscillations due to deformation can change a walk up to 54 mm that ensures non-dropping out of tubers of potato from cleanser.