Research on liquid supply performance of multi-nozzle electrospray head based on stacked flow channel structure
In an odd-numbered multi-nozzle electrohydrodynamic jet printing system,aiming at the problem that the non-uniform flow obtained by the nozzle array when the flow pump is supplying liquid affects the printing quality,a solution is proposed to set up a stacked micro-channel in the nozzle to assist in the shunting.Based on the above-mentioned stacked microchannels,the influence rule of the geometry,structural parameters and parallel arrangement of the flow channels on the diversion effect of the diversion unit is systematically studied.The results show that the distribution performance of the flow channel with the regular hexagonal diversion unit is better;increasing the groove width of the "porous" fractal channel can improve the uniformity of liquid supply;when the groove width of the main channel is not more than 0.6 mm,uniformity of liquid supply in the flow channel increases with the increase of the width of the main channel;the uniformity of liquid supply in the double-stage flow channel with the total number of 17 parallel outlets is better.Further,the stacked micro-channel shunt structure is integrated with the actual nozzle,and it is verified that under the conditions of the actual applied electric field of the printing system,the channel can still maintain a good uniformity of liquid supply and the maximum non-uniformity of the outlet is within 6%.
electrohydrodynamic jet printingstacked microchannelodd-numbered multi-nozzleflow distribution uniformity
万方数据
维普
