Tendencies of non-assur mechanisms use in the structure of technological machines

Abstract

The article gives the scientific research analysis results in the field of non-assured mechanisms on the basis of which the conclusion is made about the need for further development of mechanisms and methodological approaches to the synthesis of machines with special properties of the kinematic structure. This makes it possible to reduce energy consumption and improve technical performance, in particular, grinding machines and presses with gear and jagged actuating devices. The developed general scheme for the formation of the adaptable parameters of the technological machine establishes the dependence of these parameters on the conditions determined by the external environment, the properties of the initial and final product, and also implements the design of a materials grinder with different physical and mechanical properties, a press for molding fuel granules based on gear and jagged actuating devices with tense closed kinematic contours. The results of experimental studies have confirmed the existence of a relationship between the magnitude of the closed kinematic loop prestressing and the energy of the grinding and pressing process. The revealed regularities make it possible to minimize energy consumption in accordance with the strength of the mill charge or the size of the deformed sample by choosing rational parameters of the circuit stress, i.e. to adapt the technological machine to the properties of the processed material. Experimental studies of a gear mill on a sample of sandstone, quartz, marble have confirmed that, with the same energy consumption, the maximum grinding efficiency (an increase in the proportion of fine particles) is achieved only in a certain range of closed kinematic circuit loading corresponding to the strength of the mill charge. The data obtained make it possible to use the effect of a tense closed kinematic contour of gear and jagged actuating devices in technological machines for various purposes.