Design of a New Magneto-Rheological Pressure Seal for Rotary Shaft

摘要

In this study, a new pressure seal, which can adjust the magnitude of the yield stress of the chamber containing amagnetorheological (MR) fluid, is investigated. The proposed seal can maintain the required pressure during the rotationof the shaft which may vary due to the friction. This design is based on the field-dependent special characteristics of MRfluid. Specifically, the inherent property of MR fluid changing from the liquid phase to semi-solid phase by applying themagnitude is utilized to achieve this goal. Owing to the semi-solid property of MR fluid under the magnetic field, MRfluid can replace the role of silicon materials in designing seal structure. Due to the high sealing provision, the proposedseal can be applicable to pressure locking, dust- and water-proof, and mating two different pieces. The maximal pressurewhich can be handled by the proposed is derived and analyzed in each case. The behaviors of fluid inside the housing issimulated and observed through the commercial software. The optimization of seal dimensions are then calculatedwithout the pressure loss in design process.