THE MAIN DIRECTIONS OF DESIGNING IMPROVED ENERGY-EFFICIENT LIQUID RING VACUUM PUMPS IN THE AGRO-INDUSTRIAL COMPLEX

Abstract

Vacuum technologies have found wide application in the technological processes of the agro-industrial complex. For example, pneumatic conveying systems operating on vacuum pressure are actively developing. They are suitable both for handling dry bulk materials and for handling liquids (milk, equipment flushing solutions, liquid fertilizers, etc.). Also, the use of vacuum is a good way to intensify processing processes, such as drying, extraction, evaporation, etc. Low-temperature boiling of the liquid occurs under vacuum, which allows you to process quickly and retain the maximum amount of biologically active substances. Among machines that organize vacuum, liquid ring vacuum pumps are among the most promising for research. They are simple and reliable in operation, have a low level of noise and vibration and are capable of pumping air containing vapors, dropping liquid and solid inclusions. However, there are disadvantages - low vacuum depth, low efficiency due to the need to expend a large amount of power on the rotation of the liquid ring, etc. These problems can be minimized by introducing into the design the regulation of the flow section of the discharge window and the rotating pump housing, which will kinematically close with the working wheel. When designing a LHVN, first of all, the required number of working stages is determined based on the given technological parameters of the process for which the pump is used. Then, a preliminary design is made, a schematic diagram is determined and the main geometry of the participating components is developed, taking into account the existing restrictions. Prospects for research in this area are the improvement of existing designs, as well as the introduction of the proposed design solutions in the design of two-stage pumps.