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Justification of rational design parameters of milking machine for installations with milk line system

This article is devoted to improving the efficiency of the milking process by improving the mode of milk transport by using a two-chamber milking cluster with partial air intake into the milk collecting chamber in the d-phase. Creating a two-chamber cluster with partial air intake will combine the main benefits of operating a milking machine with an alternate and simultaneous pulsator, stabilize the vacuum pressure in the b-phase and create a sufficient pressure gradient in the d-phase. To establish and verify the design parameters of the twochamber milking cluster, a program and methodology for conducting experimental studies have been developed. Experimental samples of the milking cluster and a laboratory stand with the possibility of varying factors were developed for the research. To determine the influence of factors on the amplitude of the oscillation of the vacuum pressure in the collecting chamber of the cluster in the b-phase and in the d-phase compression stroke, a screening factor experiment was performed. It is experimentally established that the vacuum pressure resistance in the b-phase, within the zootechnical requirements, will be at the diameter of the throttle hole within 2-3 mm, and the diameter of the milk hose more than 12 mm. The use of the milk hose dh = 10 mm in combination with the small diameter of the throttle hole gives a vacuum variation from 15 to 17 kPa. This is characterized by insufficient air supply and does not provide a pressure difference for transporting a portion of milk to the milk line. The use a 12 mm diameter milk hose creates a vacuum pressure drop from 18 to 11 kPa. The use of a 14 mm diameter milk hose creates a drop in vacuum pressure within the range of 38 to 27 kPa, which is not enough to transport the milk-air mixture.