To eliminate the limitations on the structure and installation, researchers have separated the piezoelectric actuator from the diaphragm of the pump chamber to make an indirect drive piezoelectric diaphragm pump. This installation limits the deformation of the vibrator, making it difficult for the pump chamber to obtain a large volume change. In order to construct a closed volume pump chamber, the vibrator must be sealed to the periphery of the pump body. Ī typical piezoelectric diaphragm pump uses a circular piezoelectric vibrator to directly drive fluid. This type of pump has the advantages of simple structure, easy miniaturization, zero electromagnetic interference and low noise, so it is widely used in many fields such as biomedicine, fuel cells, cooling systems, and household appliances. The piezoelectric diaphragm pump, which uses a piezoelectric actuator as a drive unit, is a common form of positive displacement pump. When the chamber height was 0.15 mm, the output pressure reached a maximum value of 85.2 kPa. When the pump chamber height was 0.25 mm, the output flow rate of pumping water reached a maximum value of 213.5 mL/min. When the peak-to-peak voltage of the driving power was 220 V, the amplitude of the diaphragm reached a maximum value of 0.43933 mm, and the volume change of the pump was correspondingly improved. The results show that the piezoelectric resonance pump resonated at 236 Hz when pumping air. After analyzing the working principle of the piezoelectric resonance pump and establishing the motion differential equation of the vibration system, prototypes with different structural parameters were made and tested. The pump chamber diaphragm was separated from the driving unit, and the resonance principle was used to amplify the amplitude of the pump diaphragm. In order to increase the volume change of the pump chamber, a square piezoelectric vibrator with a flexible support is proposed in this paper and used as the driving unit of the pump. ![]() Small volume changes are important factors that restrict the improvement of the performance of a piezoelectric diaphragm pump.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |