SIMULATION OF THE INTERACTION OF MAGNETIC ASSEMBLIES OF THE "KARUSEL" LEVITATING MILKING PLATFORM

On large dairy farms of 1,200 heads or more, milking machines of the "Karusel" type with a capacity of 40 to 90 milking places have become the most widespread. The large size of the installation itself and the high mechanical load on the platform determine the increased wear of the wheel thrusters (rail-wheel). Therefore, the development of a levitating milking platform with permanent magnets is of urgent importance. The study was conducted to determine the parameters of the magnetic field generated by permanent magnets based on simulation using the Ansys Maxwell program. Three variants of magnetic assemblies were considered: with permanent rectangular, cylindrical and cubic magnets assembled in the form of Halbach arrays. The visualized results of 3D-modeling of the levitating magnetic field between movable and stationary magnetic assemblies in the form of magnetic induction lines have been obtained, allowing us to assess the overall picture of the magnetic field distribution in the air gap and beyond, and determine its force characteristics, creating the effect of levitation, as well as the number of magnetic assemblies per milking place. The average value of magnetic induction in a working gap of the magnetic assemblies made: for rectangular magnets (100×100×30mm) - 0,306 TL, cylindrical magnets (100×30mm) - 0,233 TL and double symmetric Assembly of Halbach (5×5) of the five magnets cubic form (25×25×25) - 0,539 TL. Specific repulsive forces per 1 kg elementary magnetic assemblies for rectangular magnets made - 84 N/kg cylindrical - 48,7 N/kg for the Assembly of Halbach - 314,3 N/kg. It is preferable to use Halbach assemblies when creating a levitating milking platform.