Abstract
The crushing equipment is characterized by a significant energy-consuming system during the crushing workflow. The current trend in the development of such processes puts forward requirements for the development of new or improvement of existing energy-saving equipment. The essence of the solution to the problem in this work is determined by using resonant modes, which are inherently the most effective. The practical implementation of the resonance mode has been achieved taking into account the conditions for the interaction of the resonant vibration crusher with the material at the stages of its destruction. The degree of the stress-strain state of the material is taken into account, which was a prerequisite for identifying the potential for the development of a vibration load. Composed equations of motion based on a substantiated discrete-continuous model of a vibration crusher and processing material. An approach is applied to determine the stepwise destruction of the material with the determination of the required degree of energy. This methodological approach made it possible to reveal the nature of the process of material destruction, where energy costs at the stages of crack formation, their development and final destruction are taken into account. It was revealed that the greatest energy consumption during the operation of crushers goes into the kinetic energy of the crushing plates and the potential energy of deformation of the springs. The proposed model is common for any design of a vibration machine and its operating modes. The stable resonance mode has made it possible to significantly reduce the energy consumption for the course of the technological process of material grinding. The results obtained are used to improve the calculation methods for vibratory jaw and cone crushers that implement the corresponding energy-saving stable zones of the working process.
Highlights
Introduction4/7 ( 112 ) 2021 the rate of development of scientific and technological progress is growing every year
The construction industry is one of the leading industries worldwide
This work is based on energy hypotheses that do not take into account the presence of a crack in the material, and the fracture process itself is considered as a single process
Summary
4/7 ( 112 ) 2021 the rate of development of scientific and technological progress is growing every year. All approaches to improving the energy efficiency of a crushing machine can be divided into three categories: 1) development of a new design; 2) improvement of the existing design; 3) optimization of the workflow. The main factors include the shape of the material and its strength, the presence of cracks in the material (the size of the crack, its dislocation relative to the applied force and the number). It is necessary add the location of the material itself in the crushing chamber (resting on the working surfaces of the machine or interacting with other pieces of crushing material), etc. An urgent task, in addition to creating new crushing equipment, is the task of reducing the energy consumption of the existing crushing equipment
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