Abstract
Vacuum transport units based on water-ring pumps are used for pumping aggressive liquids. The previously developed mathematical model of the liquid pumping process was used to assess the effect of changes in the rotor speed. The load characteristics of the ELRS-45 water-ring vacuum pump from ERSTVAK were used in the calculation. The numerical method was used to solve the system of differential equations. Increasing of the rotor speed leads to a decrease in the absolute pressure in the tank at the end of the first step. As a result, the volume of liquid pumped in one cycle increases significantly. The average performance of the unit is significantly increased. While energy efficiency decreases. The calculated parameters allow you to select the characteristics of automatic control of the system.
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