The 18th International Conference on Electrorheological Fluids and Magnetorheological Suspensions (ERMR 2023)

Magnetorheological fluid (MRF) equipment subjected to shocks may expose the fluid to extreme flow environments, in which shear rates may exceed 10⁵ s^-1. Currently, most rheometers can only measure the rheological behavior of MRF under low shear rate conditions. It is clearly inappropriate to design a high shear rate MRF equipment based on low shear rate data. One of the challenges in designing a high shear rate MRF detection device is mechanical noise and operational portable. In this paper, a concentric cylinder type MRF detection device with low mechanical noise and easily operated is proposed. The high-speed drive module of the detection system causes a lot of mechanical vibration noise. Drive module vibration affects the performance of MRF measurement module, which leads to a decrease in the accuracy of the characterization results of the MRF. In order to eliminate the negative impact of the drive vibration on measurement module, a new noise suppression structure is proposed in this paper. The MRF detection device was designed based on finite element theory and experiments were conducted. This device also designed with a fluid rapid loading and unloading module. The MRF characteristics at a shear rate of 35000 s^-1 were measured using an MRF detection device. It is shown that the device reported in this study is potentially valuable in determining the high shear characteristics of MRF.

MRF,measurement device,high shear rate