Abstract
The article describes the process of destruction of soil lumps on sifting separators of potato harvesters, based on the theory of low-cycle fatigue strength, based on the position that the destruction occurs as a result of the presence of initial defects and consists in the nucleation and development of cracks present in the body. A probabilistic model of reducing to “pass-through” sizes of large soil particles is considered, considering not only their destructive, but also hardening effect of cyclic loads of sifting separators, as well as the effect of areas of load application to the lump on the intensity of the destruction process and the purity of the heap. The conclusion was obtained that it is possible to increase the efficiency of the process of destruction of soil particles when using vibration effects. A design is proposed and the optimal parameters of a vibration separator with a reflector are determined.
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