Abstract
It is obvious that the volumetric method of regulating the drive system is the most energy efficient. Implementation of the volumetric method is an expensive engineering solution for conventional hydraulic systems, but magnetorheological drives minimize the difference between costs of using volumetric and throttle control methods. Therefore, the paper describes a method for increasing the efficiency of magnetodynamic pumps by applying helical control electromagnetic fields. The authors presented an unconventional patented design solution of the formulated task and created an algorithm for improving the efficiency of the operation by optimizing the flow path geometry. A design solution to increase efficiency of magnetodynamic pumps is implemented by controlling the flow of magnetorheological fluid in the external dynamic helical electromagnetic fields; it generates hydrodynamic effects, transfers the radial velocity component of the flow and forms a helical path of magnetorheological fluid particles. The helical control fields are induced by a cascade of electromagnetic control blocks, which consist of differential winding elements arranged in a circle. It initiates the rotating and reciprocating motion of magnetorheological fluid. A numerical model has been developed to improve the efficiency of its operation and includes magnetodynamic and hydrodynamic parts. The use of this numerical model makes it possible to rationalize the characteristics of magnetodynamic pumps. The paper presents a step-by-step algorithm of improving the efficiency of the magnetodynamic pump operation. The algorithm describes the sequence of determining the required parameters and patterns. Speed components are rationalized by a parameter, which characterizes the intensity of flow rotation. As a result of a numerical experiment, static characteristics of the magnetodynamic pump were obtained for different values of the mentioned parameter.
Keywords
Magnetodynamic pump, efficiency of the operation, helical magnetic fields, hydrodynamic effects.
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