Design and simulation analysis of electric needleless syringe

Abstract

A new design of a needleless syringe based on a moving-coil electromagnetic linear actuator drive is proposed to address the problems of the uncontrollable driving force and bulky structure commonly found in current commercial needleless syringes. The structural parameters of the moving-coil electromagnetic linear actuator with the electromagnetic driving force at different current strengths are obtained using the finite element analysis method. The results of jet stagnation pressure and jet velocity were obtained by MATLAB numerical calculation and CFD jet simulation. The process of 0.1 ml drug diffusion under the skin at a current size of 40 A was simulated. The results show that the jet stagnation pressure at the nozzle is 32 MPa, the jet velocity is 246 m/s, and the jet diffusion depth reaches 15 mm under the maximum driving force condition. The output electromagnetic force of the moving-coil electromagnetic linear actuator in this scheme is proportional to the current’s magnitude, and the actuator’s small size allows it to be used as a driving component of a hand-held needleless syringe.