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<p>The limited micro-amplitude of piezoelectric discs is a critical factor constraining the output performance of valveless piezoelectric pumps. To address this limitation and enhance the volumetric change within the pump chamber, this study proposes a resonant valveless piezoelectric pump equipped with a Tesla valve. By decoupling the pump chamber diaphragm from the excitation unit and leveraging the principle of resonance, the diaphragm’s amplitude is amplified, thereby improving the overall output performance of the piezoelectric pump. Additionally, the "diode effect" of the Tesla valve is employed to achieve unidirectional fluid flow. First, the motion differential equation for the excitation unit is derived based on the operating principles of the resonant pump, and a force analysis of the pump chamber diaphragm is conducted. Second, the finite element method is used to simulate the flow velocities in both forward and reverse directions through the Tesla valve. Finally, a prototype of the pump is fabricated and experimentally tested. The experimental results indicate that the resonant pump achieves a maximum output flow rate of 108&#xa0;mL/min when the mass block is 15&#xa0;g, the driving frequency is 35&#xa0;Hz, and the driving voltage is 150&#xa0;V. Interestingly, increasing the stiffness of the spring leads to a decrease in the output flow rate. For instance, when the spring diameter is 14&#xa0;mm, the flow rate reduces to 83&#xa0;mL/min. Furthermore, increasing the shunt angle of the Tesla valve improves the pump's output performance; however, when the angle exceeds 60°, the flow rate decreases to 77.7&#xa0;mL/min.</p>

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Resonant valveless piezoelectric pump with tesla valve

  • 期刊论文

  • 发表日期：

    2025年5月13日

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  • Xiaochao Tian,
  • Zhenming Wang,
  • Yingyu Dai,
  • Defeng Niu,
  • Zhicheng Zhong,
  • Xia Liu

摘要

The limited micro-amplitude of piezoelectric discs is a critical factor constraining the output performance of valveless piezoelectric pumps. To address this limitation and enhance the volumetric change within the pump chamber, this study proposes a resonant valveless piezoelectric pump equipped with a Tesla valve. By decoupling the pump chamber diaphragm from the excitation unit and leveraging the principle of resonance, the diaphragm’s amplitude is amplified, thereby improving the overall output performance of the piezoelectric pump. Additionally, the "diode effect" of the Tesla valve is employed to achieve unidirectional fluid flow. First, the motion differential equation for the excitation unit is derived based on the operating principles of the resonant pump, and a force analysis of the pump chamber diaphragm is conducted. Second, the finite element method is used to simulate the flow velocities in both forward and reverse directions through the Tesla valve. Finally, a prototype of the pump is fabricated and experimentally tested. The experimental results indicate that the resonant pump achieves a maximum output flow rate of 108 mL/min when the mass block is 15 g, the driving frequency is 35 Hz, and the driving voltage is 150 V. Interestingly, increasing the stiffness of the spring leads to a decrease in the output flow rate. For instance, when the spring diameter is 14 mm, the flow rate reduces to 83 mL/min. Furthermore, increasing the shunt angle of the Tesla valve improves the pump's output performance; however, when the angle exceeds 60°, the flow rate decreases to 77.7 mL/min.