Study Of High-precision And High-frequency Micro-pump Based On GMM

Giant Magnetostrictive Material is a new and efficient kind of high-tech material, which can implement electromagnetic-mechanical energy conversion. It has high electromagnetic coupling coefficient, notable features of response speed and large output force. Micro devices with new functional materials also have mushroomed as emerge in endlessly. With the field of hydraulic transmission and control developing rapidly, giant magnetostrictive material plays a vital role, micro-pump developed by which will have broad application prospects.Based on the advantage of giant magnetostrictive material and its application condition, make an application research on high-precision and high-frequency micro-pump based on GMA. On the issue of GMM materials thermal deformation restrain and micro-pump oil leakage problems, discuss the temperature control device of the converter and micro-pump seal of pump chamber structure design method, and design a new type of composite temperature control device and a flexible hinge film output device. In order to reduce micro-pump leakage, this paper puts forward the new idea of flexible hinge film output. The great flexibility&high precision flexible hinge film has carried on the detailed design, and design a kind of composite flexible hinge film. In order to match the drive frequency of GMM rod at the same time, modal analysis has been carried out on the flexible hinge film and its inherent frequency is388Hz. The paper carries out theoretical analysis of the micro-pump’s heating mechanism, and use finite element analysis software to analyze temperature distribution of the drive under temperature control with complex method and nothing. From simulation results, complex temperature control method is effective under the intermittent work condition of2h. It ensures the temperature of the GMM rod in a44.5℃or so, and it will rise to about75℃with no measures to control the temperature, ensured the temperature of the GMM rod reasonable, felled by39%. The static and dynamic characteristics of micro-pump model was established based on the linear piezomagnetic equation. Use AMESim to discuss the influence of the driving current and driving frequency to the size of the converter’s output displacement and force and micro-pump’s pump-pressure and the output flow rate respectively. From simulation results, in1.5A、300Hz condition, the step rise time is0.292ms, the steady state output displacement is95.15μm, the steady state output force is1427N,and the output flow is1.86L/min, which verifies GMA has notable features of high response, large output displacement and large output force.Above all, compared with the traditional micro-pump, micro-pump with the flexible hinge seal cavity and composite temperature control device has higher accuracy and can be used in precision machining, aerospace, and biomedical sciences. It laid a solid theoretical foundation for the future of Giant magnetostrictive devices development, and also has important significance to the design and application.