Abstract
Domestic and foreign industries do not produce milking machines that would fully comply with the physiology of animals. Full milking of the udder and reduction of cows with ma-stit significantly depends on the operation of the milking machine. The quality of serial milking cups does not fully meet modern zootechnical requirements. In the process of their work, especially at the beginning and at the end of milking cows, "idle" milking can take place at nominal vacuum. Milking at high vacuum often irritates the teat sphincter, which often causes mastitis in animals, followed by cancer. Also, along with the growth of milk production, its quality is extremely important. The main technical solutions for milking machines with controlled change of vacuum pressure are analyzed. Some theoretical and experimental studies of the milking machine, which provides a reduction of the vacuum load on the udder and a rigid vibration effect on the teat sphincter at nominal vacuum in the process of machine milking cows. Despite the many known solutions to improve the milking machine, the task of creating a design that combines high productivity and stimulation of the reflex remains relevant. Designs of milking machines are now being improved mainly in two directions, namely - the development of milking machines that allow you to adjust the operating parameters depending on the level of milk yield and design improvements of milking machines that stimulate the milk reflex without causing the animal negative effects. Theoretical studies of the working process of machine milking allowed to systematize the method of engineering calculation of the milking machine with controlled mode of vacuum pressure on the teats of the cow and to determine the optimal design parameters of the executive mechanisms. The obtained analytical expressions characterize the influence of their parameters and mode of operation on the dynamics of milk production during machine milking of cows.
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