Theoretical justification of the design parameters of a screw-type feeding device in the facility for the preparation of liquid feed mixtures

BACKGROUND: Most of the main livestock products in the coming years will be produced on existing farms under collective lease conditions, as well as on individual farms, which will ensure intensive management of the industry.

AIM: Study and obtaining of theoretical and analytical dependencies to justify the design parameters of the feeding device in the facility for the preparation of liquid feed mixtures.

METHODS: The presented facility for the preparation of liquid feed mixtures is a multifunctional technical device capable of performing three functions: dosing the material (a whole milk substitute), supplying liquid (the pumping function) and preparing the mixture (the mixer function). The corresponding calculation schemes for determining the parameters are given.

RESULTS: An analysis of the working bodies of machines and mechanization for transporting dry components shows that a screw body, manufactured according to scientifically based recommendations, can meet the requirements and characteristics of the component supplied for mixing.

The process of separating the dry component and moving it to the impeller is as follows. The dry component is located in the loading chamber 1 and then, under the gravity, it falls on the feeding device 2, which moves the feed to the impeller. In case of translational motion of the machine, the wedge-shaped lower edge of the screw housing is inserted into the roller component and separates it from the surface, which then enters the working area of the screw. The auger mills part of the dry food with its flights and moves it to the impeller of the facility.

CONCLUSION: The obtained theoretical and applied analytical dependencies make it possible to determine the design parameters of the screw, including the screw pitch to diameter ratio, which must be taken into account when designing facilities for preparing mixtures with the supply of a dry component to the impeller. This method can also be used for writing computer programs.