Abstract
The efficiency of milking dairy farm animals depends on the reliability of the milking equipment. Domestic milking machines are equipped with UVU 45/60 with a rotary vacuum pump that has an extremely limited service life, which is mainly due to imperfection of the lubrication system for its working bodies. In addition, oil loss along with the exhaust air leads to high lubricant consumption and environmental pollution. Analysis of modern designs of foreign rotary vacuum pumps shows that their operational reliability and service life are increased at the expense of maximum reduction of friction in the working body due to the improvement of the lubrication system, increased productivity, and elimination of oil loss and environmental pollution. One of the technical solutions to solve these problems is to equip the vacuum installation with a device that provides circulating lubrication of the pump working bodies without emitting oil into the atmosphere. The team of authors substantiated the design of the oil trap for the pump lubrication system with the efficiency of separating oil from the exhaust air up to 95 %. Experimental vacuum installations with single-circuit and double-circuit lubrication systems have been developed. Production tests of vacuum installations performed at a number of farms in Stavropol Territory confirmed high efficiency of the proposed engineering solution. The operational reliability of the pump due to the circulating lubrication of its working bodies in terms of the prolonged overhaul period increased by 65-70 %. Irrecoverable oil losses and environmental pollution are almost excluded. The payback period for additional capital investments in the vacuum installation design does not exceed 1.2-1.5 years.
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