IMPROVING EFFICIENCY OF CONTINUOUS MIXERS WITH AN OSCILLATION MECHANISM

PURPOSE. Continuous mixing technological equipment is widely used in industry, construction engineering and agriculture. Some mixers alongside with rotatory motion of actuators also employ reciprocating motion (oscillation) in order to improve the quality of mixtures. The purpose of this work is to identify the possibility of improving these machines performance through increasing their kinematic parameters. METHODS. A design model of a two-shaft mixer has been developed in the course of study. It allowed to perform a mathematical modeling of kinematic and power parameters of the mechanism. RESULTS AND THEIR DISCUSSION. The relationships between the kinematic, dynamic and geometric parameters of the mixer mechanism are analyzed. The dependences of axial and tangential loads on the ratio of velocities, as well as axial velocity and acceleration on the ratio of velocities are obtained. CONCLUSIONS. The axial velocity has the greatest value when the rotation angle of the eccentric equals 180° and the acceleration is 120 or 240°. To reduce actuator’s dynamic loads it is necessary to use such high-speed modes, under which the acceleration varies insignificantly, i.e. in the interval of the velocity ratio from 0 to 0.2. The study results show that the increase in the ratio of axial and tangential velocities increases the tangential load and decreases the axial load on the working shaft blades.

continuous mixer, oscillation, kinematic parameters, dynamic parameters, mathematical modeling, axial velocity, tangential velocity

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