【摘要】 为了输送纳卫星热控系统中的高黏度冷却液,提出了一种柔性瓣膜阀压电泵。根据人体主动脉瓣的形状特点设计了柔性瓣膜阀的结构,旨在模拟人体心脏的仿生泵送功能。通过有限元的方法对柔性瓣膜阀进行了应力-应变分析,结果表明柔性阀具有单向截止性并可集成于压电微泵。开发并加工制作了锥形管柔性瓣膜阀压电泵和柱形管柔性瓣膜阀压电泵,输出性能试验结果表明,柱形管柔性阀压电泵的最大流量为15.38 mL/min,比锥形管柔性阀压电泵的流量高170.77%。试验验证了柱形管柔性阀压电泵具有输送高黏度液体的能力,在纳卫星热控制系统中具有应用潜力。更多还原

【Abstract】 A piezoelectric pump with flexible valve has been developed to pump high viscosity cooling liquid in the nanosats thermal control system. The structure of the flexible valve is designed according to the characteristics of the human aortic shape with the aim to simulate the bionic pumping function of the human heart. Dynamic stress-strain features of the flexible valve are analyzed by the finite element method,and the results show that the proposed flexible valve is suitable and functional for the piezoelectric pump. Then the cylinder and diffuser/nozzle piezoelectric pumps based on flexible valves have been developed and fabricated. Experimental results of the output performance indicate that the maximum flow rate of the cylinder piezoelectric pump with flexible valve is 15.38 mL/min,170.77% higher than the diffuser/nozzle piezoelectric pump with flexible valve. The ability of the cylinder piezoelectric pump with flexible valve for transmitting high viscosity liquid has been validated. The piezoelectric pump with flexible valve has potential applications in the nanosats thermal control system.更多还原