Abstract
The article highlights the advantages and benefits of pipeline transport of liquid feed mixtures on small pig farms, the device and the principle of operation and technical characteristics of the improved rotor pump developed by the authors of the article. Methods of experimental research to determine the concentration of feed mixtures, the influence of the shape of the separator on the performance characteristics, the required power and the flow of an improved pump are presented. The results of the experiments showed that one of the bottlenecks limiting the operation of rotary pumps on feed mixtures of increased concentration is the low suction capacity of the pump, that is, the design of the suction pipe of the pump, where an increase in resistance with an increase in the concentration of feed mixtures causes a breakdown of the operating mode and cavitation. To resolve this issue, we used a screw feeder installed in front of the pump suction nozzles. It was found that if the screw feeder provides excess pressure within (about, 0.25 ... 0.3) 105 Pa per suction cavity, the pump operates stably and reliably.
Highlights
Modern pig farming is the world's leading livestock industry; occupying a leading position in the 'meat' balance
Based on the analysis of the designs and performance of the pumps used for the supply of viscous slurries, as well as the requirements imposed on them and taking into account the preliminary expirations, the design and technological scheme of a two-rotor rotary pump was adopted as an object of research [16,17,18,19], and a rotary pump with a screw feeder was developed for supplying liquid feed mixtures by pipe distributor
Our preliminary studies of this pump showed that a rotary pump of this design works stably at a feed mixture moisture content of 70 % or more
Summary
Modern pig farming is the world's leading livestock industry; occupying a leading position in the 'meat' balance. In the structure of world meat production, pork ranks first (38.739.7 %). In Asia, the share of pork in the production of all types of meat is 54.6 %, in Europe 51.0 %, in Russia 32.4 % [1]. The organization of productive, cost-effective pig breeding on small farms can be successfully solved if it is carried out at a high technical level and with a rational animal feeding. Dry food does not require additional preparation, it is convenient for distribution, but it increases the dustiness of the air in the pigsty and causes respiratory diseases in pigs. When the animals are fed only with dry compound feeds, their digestibility decreases by 4 .. When the animals are fed only with dry compound feeds, their digestibility decreases by 4 .. 6 % compared to the use of wet feed mixtures [2,3,4,5]
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