JUSTIFICATION OF CHANGE IN CASE OF VACUUM PUMPS

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Milk production is closely related to the milking process. The operations that are involved in this process require high responsibility and are quite laborious. The economic efficiency of the milking process depends not only on the qualifications of the operators, but to a large extent is determined by the technical perfection of the means of mechanization that are used. After all, the vacuum pump, which is part of any milking installation, has a significant impact on the productivity of the latter. The operation of the executive elements of the milking machines, as well as the transportation of milked milk, depends on the amount of air taken. The perfect design of the vacuum pump affects the energy consumption of the milking process. The analysis of vacuum pumps used in the technological process of machine milking is made. Research and literary sources indicate that mechanical rotary vacuum pumps are most widely used, this is explained by a number of technical and economic indicators. The specific energy consumption of a rotary vane vacuum pump depends on the value of the set working vacuum and the rotor speed. In most rotary vane vacuum pumps, the housing design provides for the movement of air through the inlet pipe to the inlet port and does not fill the space between the two blades as much as possible. If the air is escaping, it cannot be quickly emitted through the outlet window. These disadvantages are eliminated by the fact that a transverse groove is located at the end (in the direction of movement of the rotor) of the inlet window. To effectively remove air from the pump, the outlet window, at the beginning (in the direction of the rotor movement), has a transverse groove, the dimensions of the grooves are 4/5 of the width of the vacuum pump housing and less than 1/2 of the width of the corresponding window. The proposed design of the body of the vacuum pump makes it possible to increase the productivity by 7-12% and reduce the power consumption for the drive by 8-10%, in addition, there is a decrease in the heating of the body to 67-74 °С.