Aiming at the problem of sealing characteristics of dynamic seals using magnetorheological（MR）fluids

the sealing characteristics of MR fluid seals for rotary MR dampers are studied by experimental methods.According to the structure characteristics of the damper and the MR fluid sealing device

the experimental system structure of MR fluid sealing device is designed.Based on the basic magnetization curve of MR fluid and the characteristics of magnetic core material

the magnetic circuit design of the experimental system is finished.Experimental system is established to test the sealing characteristics of different sealing gaps

and the experimental results are analyzed.The research results show that the sealing gap with different radial dimensions will be filled with MR fluid after rotor rotating to a certain revolution

no continuous leakage occurs when rotor continue to rotate

dynamic seal is achieved.