Dmitriev I. Substantiation of working conditions and constructive and technological parameters for adaptive air-powered magnetic pulsator of milking machine

Dissertation Thesis is aimed at raising the efficiency of cows' machine milking by means of substantiation the working conditions and constructive and technological parameters for adaptive air-powered magnetic pulsator of milking machine. The constructive and technological aspects and parameters of pulsator have been analyzed as well as their impact on milk yield. It was found that the relevant way to increase the efficiency of machine milking is the development of adaptive air-powered magnetic pulsator of milking machine. Structural and functional pulsator scheme as well as the analytical dependence for modeling the time-setting membrane stresses have been elaborated that provided the opportunity to regulate the transient process in inter-walls chamber of milking machine. The mathematical model for the duration of air exhaust and inflation in the chambers of changeable vacuum-gage pressure have been derived. It has been proved both theoretically and experimentally that provision of assigned time parameters for the processes of air exhaust and inflation in chambers is achieved due to the certain diameter of pulsator blowholes and depends on vacuum-gage pressure and chamber size of changeable vacuum-gage pressure of "teat cup pulsator" system. Rational parameters for adaptive air-powered magnetic pulsator that provide increase of daily average milk yield, decrease of labor costs for performing the final jobs and rise in labor productivity in 1,38 times have been grounded. Key words: milking machine, air-powered magnetic pulsator, membrane, machine milking, teat cup, vacuum-gage pressure, pressure gage, indicator diagram, scheduled experiment, time characteristics.