A review of recent studies on valve-less piezoelectric pumps

Due to the advantages of small size, low power consumption and price, no wear, and reliable performances of valve-less piezoelectric pumps, which academics have studied and gained excellent consequences for, valve-less pumps are applied in the following fields: fuel supply, chemical analysis, biological fields, drug injection, lubrication, irrigation of experiment fields, etc. In addition, they will broaden the application scope in micro-drive fields and cooling systems in the future. During this work, first, the valve structures and output capabilities of the passive valve and active valve piezoelectric pumps are discussed. Second, the various forms of symmetrical structure, asymmetrical structure, and drive variant structure valve-less pumps are introduced, the working processes are illustrated, and the advantages and disadvantages of pump characteristics with the flow rate and pressure are analyzed under different driving conditions. In this process, some optimization methods with theoretical and simulation analysis are explained. Third, the applications of valve-less pumps are analyzed. Finally, the conclusions and future development of valve-less piezoelectric pumps are given. This work attempts to provide some guidance for enhancing output performances and applications.

Automated summary

Valve-less piezoelectric pumps have been widely applied in fields such as fuel supply, chemical analysis, biological fields, drug injection, lubrication, and irrigation due to their advantages of small size, low power consumption, no wear, and reliable performances. The various forms and working processes of valve-less pumps are discussed, along with the advantages and disadvantages of pump characteristics under different driving conditions. The applications and future development of valve-less pumps are also analyzed. This work provides guidance for enhancing output performances and applications.