Research And Experiment Of Bidirectional Electromagnetic Drive For Wide Suspended Projectile Weft Insertion

Aiming at the problems of the traditional torsion-axis pick-and-pick weft insertion,such as large impact,low energy utilization rate,limited speed increase and difficulty in speed regulation,this paper proposes a new method of inductive electromagnetic drive suspension two-way weft insertion pick and shuttle making.Due to the controllability of electric energy,the launch speed can be precisely controlled by using electromagnetic drive technology.Electromagnetic drive technology can enable the launch object to obtain high speed and long range in a short time and short stroke,and the energy loss is small.According to the technical requirements of the suspension weft insertion of wide-width looms,based on electromagnetism,the induction electromagnetic drive suspension weft insertion has no friction,high efficiency,and high speed.According to the proposed new induction electromagnetic drive suspension weft insertion method,the circuit model and finite element simulation model of single-phase induction electromagnetic projection and three-phase induction electromagnetic ejection shuttle are established successively.In the single-phase induction electromagnetic projection,through equivalent circuit analysis,kinetic energy calculation,electromagnetic force calculation and ANSYS simulation,the influence of the shape and structure of the weft insertion device,the afterflow branch of the circuit system,and the optimal trigger position of the drive coil on the acceleration performance of the weft insertion device is analyzed.In order to meet the technological requirements of different wide width looms,the drive stages of the electromagnetic coil can be changed to achieve different acceleration effects,The experiment simulates the acceleration process of the three-stage induction electromagnetic pickup.After the acceleration,the maximum speed of the weft guide can reach 140.65m/s;In the three-phase induction electromagnetic ejection,the size parameters of the electromagnetic catapult are designed according to the equivalent circuit and kinematics analysis,and then the three-dimensional finite element model of the electromagnetic catapult is established.The influence factors of the three-phase electromagnetic ejection exit speed are studied by adjusting the three-phase current frequency,amplitude,coil turns and air gap width.The acceleration effect of the superposition of multiple electromagnetic catapults is experimentally simulated,and the maximum speed can reach 50.58m/s.The simulation results show that the induction electromagnetic suspension weft insertion can meet the requirements of the two-way weft insertion process of the wide loom,and has a higher weft insertion efficiency compared with the traditional torsion spindle picking and magnetic resistance electromagnetic picking.Through the comparison of experiments and simulations of multistage induction electromagnetic projection and three-phase induction electromagnetic ejection,the acceleration performance and acceleration effect of single-phase induction electromagnetic projection and three-phase induction electromagnetic ejection are analyzed respectively,and the feasibility of induction electromagnetic drive suspension weft insertion technology is verified,which provides a reference for the follow-up research of electromagnetic suspension weft insertion of wide loom.