| The giant magnetostrictive harmonic motor combines the advantages of the giant magnetostrictive material (GMM) and the harmonic drive, which has a wide application range. The hydraulic micro displacement amplifier, which is used as the displacement steering and amplification device, plays a key role in the realization of the transmission. In this paper, the theory of the amplifier's displacement amplification is studied, and the actual displacement amplification effect is verified by experiment. The specific research contents are as follows.(1) Referred to relevant literature. According to the actual work requirements of harmonic motor, designed diaphragm as the input, the bellow as the output end of the amplifier structure.(2) By using the finite element method for diaphragm and bellow simulation, obtained the corresponding equivalent working area, and established the theory multiple of hydraulic displacement amplifier. Studied the factors that influence the diaphragm equivalent area, obtained the optimum size of the diaphragm transition ring fillet.(3) Designed hydraulic micro displacement amplifier experiment scheme. Actual static displacement and dynamic displacement output performance curves were obtained through experiment. Established the actual displacement multiple. The feasibility of diaphragm-bellow type hydraulic micro displacement amplifier was verified. Compare the theoretical data with the experimental data, based on the mathematical model of oil compressibility, the gas content in the oil chamber and the actual oil volume modulus of the amplifier were analyzed.(4) Based on the factors that affect the equivalent area of the diaphragm, optimization design was carried out. Combined with the 3D model design software and the finite element analysis software, the improved diaphragms were simulated and analyzed. The optimal structure model of the diaphragm was obtained, and the displacement magnification was obviously improved.Through the research content and the related conclusion above, the data reference for the follow-up research and development work of the harmonic motor hydraulic displacement amplifier was provided. It also provided support for the development of new harmonic motor. |
PDF Full Text Request