新型压电式喷墨头的数值仿真与结构优化

发布时间：2018-03-10 06:38

本文选题：压电驱动　切入点：喷墨头　出处：《大连理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：压电驱动式喷墨打印机是基于逆压电效应工作的,由于其响应速度快、非接触性、高分辨率等优点得到了广泛的应用。目前市场上使用的喷墨打印机核心部件——喷墨头,主要由国外垄断和生产,国内巨大的市场需求促使了大批学者对喷墨打印头的研究。基于喷墨打印机目前的这种发展情况,本文特别提出了一种新型的压电驱动式喷墨打印头结构。在对新型结构的实验研究和优化分析过程中,由于实验制作研究存在成本高,时间长,受仪器设备局限性大等诸多缺点,为了节约成本、提高效率,本文利用数值模拟优化方法,使用计算机软件COMSOL设计优化结构尺寸参数,根据模拟优化结果指导实验研究。首先,本文通过分析压电式喷墨打印机的工作原理,综合考虑实验室设备及能够实现的MEMS工艺,设计了一种新型的压电式喷墨打印头。相比目前市场上应用的喷墨头,该结构具有简单易制作,一体化程度高,成本低,易实现批量化生产等优点。其次,本文基于有限元方法,通过COMSOL模拟软件分析了影响该结构喷墨情况的主要因素,其中包括压电陶瓷层参数、电压、控制波形、腔室尺寸、喷孔尺寸、限流部等等。在分析了各个因素对于墨滴喷射情况的影响后,选取了最合适的结构参数,最终确定了该结构实验制作的参数。用模拟分析的方法为实验制作提供参考,降低实验成本,缩短研究时间。最后,本文通过对实验制作的新型压电式喷墨头进行了多普勒振动测试,验证了模拟分析的正确性和该结构设计的合理性。同时测试也使我们发现了结构存在的问题,为后续的研究和设计提供了帮助。
[Abstract]:Piezoelectric driven inkjet printer is based on inverse piezoelectric effect. It has been widely used because of its high response speed, non-contact, high resolution and so on. At present, inkjet head, the core component of inkjet printer, is widely used in the market. Mainly monopolized and produced by foreign countries, huge domestic market demand has prompted a large number of scholars to study inkjet printing heads. Based on the current development of inkjet printer, a new type of piezoelectric driven inkjet head structure is proposed in this paper. In the process of experimental research and optimization analysis of the new structure, the cost of experimental manufacture research is high. In order to save cost and improve efficiency, in order to save cost and improve efficiency, in order to save cost and improve efficiency, this paper uses numerical simulation optimization method and computer software COMSOL to design and optimize structural dimension parameters. According to the results of simulation optimization, the experimental research is guided. Firstly, by analyzing the working principle of piezoelectric inkjet printer and considering the laboratory equipment and MEMS process, a new type of piezoelectric inkjet head is designed. The structure has the advantages of simple and easy to make, high degree of integration, low cost and easy to realize mass production. Secondly, based on the finite element method and COMSOL simulation software, the main factors that affect the ink jet are analyzed, including the parameters of piezoelectric ceramic layer, voltage, control waveform, chamber size, nozzle size, etc. After analyzing the influence of various factors on the droplet injection, the most appropriate structural parameters are selected, and the parameters of the structure experimental fabrication are finally determined. The method of simulation analysis is used to provide reference for the experimental fabrication. The experiment cost is reduced and the research time is shortened. Finally, the Doppler vibration test of a new type of piezoelectric inkjet head is carried out, which verifies the correctness of the simulation analysis and the rationality of the structure design. At the same time, the test also makes us discover the problems existing in the structure. It is helpful for further research and design.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP334.83

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