Achieving Full Forward Flow of Valveless Piezoelectric Micropump Used for Micro Analysis System
The valveless piezoelectric micropump has the advantages of simple structure, high precision and low cost, which can realize the directional transport of micro-fluid and wildly be applied in a micro analysis system. However, backflow at the outlet cannot be avoided due to the limitation of its worki...
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| Format: | Article |
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MDPI AG
2022-08-01
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| Series: | Actuators |
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| Online Access: | https://www.mdpi.com/2076-0825/11/8/218 |
| _version_ | 1797411902080417792 |
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| author | Kai Li Xianxin Zhou Haoyuan Zheng Biao Liu Shuo Chen Weishan Chen Junkao Liu |
| author_facet | Kai Li Xianxin Zhou Haoyuan Zheng Biao Liu Shuo Chen Weishan Chen Junkao Liu |
| author_sort | Kai Li |
| collection | DOAJ |
| description | The valveless piezoelectric micropump has the advantages of simple structure, high precision and low cost, which can realize the directional transport of micro-fluid and wildly be applied in a micro analysis system. However, backflow at the outlet cannot be avoided due to the limitation of its working mechanism. Large reflux rate can increase the volume control accuracy per cycle, but reduces the stability of the micro analysis system. In order to achieve a full forward flow, which reduce the influence of backflow on the system’s stability, the reflux characteristics of the designed valveless piezoelectric micropump were studied. The condition proposed, which should be satisfied for obtaining full forward flow, is that the reflux rate should be less than 50%. The influence of relations between the size of the key structures and pumping characteristics are established, and the references for structural parameter selection to reduce backflow and achieve full forward flow are given. This paper highlights the methods of controlling the pumping performance and achieving full forward flow, based on structural parameter selection analysis and adjusting excitation. The reflux rate can be reduced to 5% when the inlet angle is increased to 9°. The experimental results verify the validity of the obtained results and the proposed methods of control. This work provides important references for applying valveless piezoelectric micropumps in micro analysis and precision-driven systems. |
| first_indexed | 2024-03-09T04:52:00Z |
| format | Article |
| id | doaj.art-6a20607487464d14b851bd64774e34a1 |
| institution | Directory Open Access Journal |
| issn | 2076-0825 |
| language | English |
| last_indexed | 2024-03-09T04:52:00Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Actuators |
| spelling | doaj.art-6a20607487464d14b851bd64774e34a12023-12-03T13:09:18ZengMDPI AGActuators2076-08252022-08-0111821810.3390/act11080218Achieving Full Forward Flow of Valveless Piezoelectric Micropump Used for Micro Analysis SystemKai Li0Xianxin Zhou1Haoyuan Zheng2Biao Liu3Shuo Chen4Weishan Chen5Junkao Liu6State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, ChinaThe valveless piezoelectric micropump has the advantages of simple structure, high precision and low cost, which can realize the directional transport of micro-fluid and wildly be applied in a micro analysis system. However, backflow at the outlet cannot be avoided due to the limitation of its working mechanism. Large reflux rate can increase the volume control accuracy per cycle, but reduces the stability of the micro analysis system. In order to achieve a full forward flow, which reduce the influence of backflow on the system’s stability, the reflux characteristics of the designed valveless piezoelectric micropump were studied. The condition proposed, which should be satisfied for obtaining full forward flow, is that the reflux rate should be less than 50%. The influence of relations between the size of the key structures and pumping characteristics are established, and the references for structural parameter selection to reduce backflow and achieve full forward flow are given. This paper highlights the methods of controlling the pumping performance and achieving full forward flow, based on structural parameter selection analysis and adjusting excitation. The reflux rate can be reduced to 5% when the inlet angle is increased to 9°. The experimental results verify the validity of the obtained results and the proposed methods of control. This work provides important references for applying valveless piezoelectric micropumps in micro analysis and precision-driven systems.https://www.mdpi.com/2076-0825/11/8/218valveless piezoelectric micropumpreflux ratefull forward flowpumping volumereflux characteristic |
| spellingShingle | Kai Li Xianxin Zhou Haoyuan Zheng Biao Liu Shuo Chen Weishan Chen Junkao Liu Achieving Full Forward Flow of Valveless Piezoelectric Micropump Used for Micro Analysis System Actuators valveless piezoelectric micropump reflux rate full forward flow pumping volume reflux characteristic |
| title | Achieving Full Forward Flow of Valveless Piezoelectric Micropump Used for Micro Analysis System |
| title_full | Achieving Full Forward Flow of Valveless Piezoelectric Micropump Used for Micro Analysis System |
| title_fullStr | Achieving Full Forward Flow of Valveless Piezoelectric Micropump Used for Micro Analysis System |
| title_full_unstemmed | Achieving Full Forward Flow of Valveless Piezoelectric Micropump Used for Micro Analysis System |
| title_short | Achieving Full Forward Flow of Valveless Piezoelectric Micropump Used for Micro Analysis System |
| title_sort | achieving full forward flow of valveless piezoelectric micropump used for micro analysis system |
| topic | valveless piezoelectric micropump reflux rate full forward flow pumping volume reflux characteristic |
| url | https://www.mdpi.com/2076-0825/11/8/218 |
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