Study on force transfer performance of spiral convection magnetorheological dampers
LÜ Weijie
LUO Jiahao
ZHANG Guang
CHEN Junyu
SUN Min
LUO Xiang
Abstract：[Objective]To address the limitations of conventional magnetorheological(MR)dampers,such as poor controllability of torque output and low torque density,a high-torque-density spiral convective MR damper with dual operational modes for both forward and reverse rotation was proposed.[Methods]Firstly,a mathematical model was established to characterize the damping torque output across multiple flow channels.Then,a physical prototype of the MR damper was developed.Lastly,a dynamic torque performance test platform was constructed to evaluate its torque output under forward and reverse modes at speeds of 40 r/min,80 r/min,120 r/min,160 r/min,and 200 r/min,with excitation currents of 2 A,4 A,and 6 A.[Results]Test results demonstrate that at 6 A excitation current and 200 r/min speed,the average steady-state torque of forward and reverse mode reaches 2.72 N·m and 2.56 N·m;the average starting torque of forward and reverse mode achieves 7.34 N·m and 7.81 N·m;the maximum torque density reaches 10 826.82 N/m2 in the forward rotation mode.These findings validate the effectiveness of the proposed design in overcoming the inherent limitations of traditional MR dampers.
Keywords：Magnetorheological fluidSpiral convectionRotary damperTorque densityDynamic characteristic
Publication Date：2025-11-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 158-166 )