AUTO BALANCING OF SIEVED SEPARATORS WITH A CONSTANT EQUIVALENT MOMENT OF INERTIA
It is noted that the sieve boots of grain cleaning machines perform linear oscillations with a high frequency for their mass which leads to the development of considerable unproductive mechanical reactive inertial power, which can exceed the productive (or useful) dissipative power by an order of magnitude. Therefore, the neutralization of inertial power leads to a significant increase in the energy efficiency of the mechanism. Self-neutralization of inertial power is carried out in mechanisms with a constant equivalent moment of inertia due to the shift of the phases of oscillation of the working bodies, with any number. At the same time the dynamics of the mechanism with a constant equivalent moment of inertia with two massive working bodies has mainly theoretical value since its practical use is difficult due to the imbalance of the mechanism. It is obvious that the degree of balance (or imbalance) of the mechanism is directly related to the “degree” of the central symmetry of the figure (star) formed by the cranks. The aim of the work is to establish the conditions for auto-balancing mechanisms with a constant equivalent moment of inertia with four and three working bodies. The tasks of the study are to determine the forces acting on the body of the mechanism. The relevance of this study is due to the need to determine the minimum possible number of working bodies at which auto-balancing of the mechanism with a constant equivalent moment of inertia is performed. “Stars” formed by cranks of mechanisms with a constant equivalent moment of inertia with more than two working bodies have central symmetry. Such mechanisms are balanced. The minimum number of working bodies perform- ing linear oscillations in a balanced mechanism with a constant equivalent moment of inertia is three.