首页> 美国卫生研究院文献>Micromachines >Effect of Enhanced Squeezing Needle Structure on the Jetting Performance of a Piezostack-Driven Dispenser
【2h】

Effect of Enhanced Squeezing Needle Structure on the Jetting Performance of a Piezostack-Driven Dispenser

机译:增强的挤压针结构对压电堆驱动分配器喷射性能的影响

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Advanced dispensing technology is urgently needed to improve the jetting performance of fluid to meet the requirements of electronic product integration and miniaturization. In this work, an on–off valve piezostack-driven dispenser was used as a study object to investigate the effect of needle structure on jetting performance. Based on fluid dynamics, we investigated nozzle cavity pressure and jet velocity during the dispensing process using theoretical simulation for needles with and without a side cap. The results showed that the needle with a side cap had larger jet velocity and was capable of generating 8.27 MPa of pressure in the nozzle cavity, which was 2.39 times larger than the needle without a side cap. Further research on the influence of the nozzle and needle structural parameters showed that a nozzle conic angle of 85°–105°, needle conic angle of 10°–35°, and side clearance of 0.1–0.3 mm produced a dispenser with a large jet velocity and stable performance, capable of dispensing microscale droplets. Finally, a smaller droplet diameter of 0.42 mm was achieved in experiments using a glycerol/ethanol mixture, with a variation range of ± 4.61%.
机译:迫切需要先进的分配技术来提高流体的喷射性能,以满足电子产品集成和小型化的要求。在这项工作中,使用开关阀压电堆栈驱动的分配器作为研究对象,以研究针头结构对喷射性能的影响。基于流体动力学,我们使用带和不带侧盖的针头的理论模拟研究了分配过程中的喷嘴腔压力和射流速度。结果表明,带有侧盖的针具有较大的喷射速度,并且能够在喷嘴腔中产生8.27 MPa的压力,这是没有侧盖的针的2.39倍。对喷嘴和针头结构参数的影响的进一步研究表明,喷嘴锥角为85°-105°,针锥角为10°-35°,侧面间隙为0.1-0.3 mm,产生了具有大喷嘴的分配器速度快,性能稳定,能够分配微滴。最后,在使用甘油/乙醇混合物的实验中,液滴直径较小,为0.42 mm,变化范围为±4.61%。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号