K. Peychev, G. Dineva, D. Georgiev
Department of Agricultural Engineering, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria

(Manuscript received 24 June 2024; accepted for publication 18 December 2024)

Abstract. The main parameters of pulsation systems in milking machines for cows are pulsation rate and ratio (pulse fill factor). They are generated and fed to the system in alternating mode. In the present material, the influence of the ratio on the temporal structures of the pulse is studied. The effect of “phase overlap” at ratios other than 50/50 and its effect on alternating mode operation is described. The analysis is focused on the nature of milk movement through the collector and the probability of occurrence of the so-called “backflow”. A reasoned recommendation concerning the device and the volume of the collectors in milking machines for cows is derived.