Calculation and design of magnetorheological chambers for hydraulic equipment
Keywords:
magnetorheological systems, technologies of working fluid control, frequency characteristics, control electromagnetic fieldsAbstract
Magnetorheological damping and vibration-absorbing systems are characterized by adaptability, good dissipation of shock and vibration load, and minor plunger movements under loads. The research is devoted to constructive solutions for magnetorheological working chambers with inhomogeneously distributed dissipative stiffness properties, and their layout in hydraulic damping equipment. The paper presents two types of magnetorheological working chambers: magnetorheological chamber with inhomogeneously distributed dissipative stiffness properties; and magnetorheological chamber with inhomogeneously distributed dissipative stiffness properties that is divided into subcavities. The proposed magnetorheological working chambers have higher energy efficiency and workflow stability. The developed damping method and its constructive implementation significantly improve the dynamics of workflow and reduce the dissipation time of shock and vibration loads. In a magnetorheological chamber with inhomogeneously distributed dissipative stiffness properties, damping is carried out by neutralizing the shock wave and by generating an acoustic wave to change its propagation velocity. The magnetorheological chamber with inhomogeneously distributed dissipative stiffness properties and subcavities dissipates mechanical energy by modeling viscous friction characteristics in the volume of magnetorheological fluid. The described numerical models make it possible to calculate and design modifications of the proposed magnetorheological working chambers. We proposed a method for calculating the design parameters of magnetorheological working chambers; it is based on values of the coefficients that take into account the frequency characteristics of control electromagnetic fields.
The results of numerical simulation illustrate the dynamics of changes of viscosity characteristics in control electromagnetic fields and values of the coefficients that take into account the frequency characteristics of control electromagnetic fields.
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