The Use of Information Technology for the Design of a Prototype Engine with Rotor in Magnetic Bearings

Abstract

The questions of planning and calculation of prototype magnetic rotor suspension of small engines at making of elaborate machine-building designs in particular pumps, turbo-expanders or expanders of compressor units of small and medium sizes. The preliminary estimation of dynamic descriptions of the rotor systems requires development of adequate mathematical models with taking into account numerous parameters, including design features, such as supports, stiffness and damping characteristics. A laboratory installation of a complete magnetic suspension of a horizontal rotor according to a combined magnetic-electromagnetic type is proposed and implemented. It uses two passive magnetic bearings created using two annular permanent magnets with axial magnetization as two radial bearings. The axial support is an active magnetic bearing (AMB) with stators in the form of armored cores. The functionality of this AMB uses a discrete method and an analog control system. Finite-element modeling was carried out and the dynamic characteristics of the structure under study were calculated. An experimental installation of the rotor propotype was developed and manufactured, with the help of which experimental testing of the developed model was carried out and the reliability of the calculated results was verified. Comparison of calculated and experimental results shows the effectiveness of the application of information technology in the design of complex engineering structures.