双作用压电泵绝缘压电振子的研究

为了提高压电泵的工作效率，提出了对压电泵中的动力元件-压电振子进行特殊绝缘处理，使压电振子在两个方向弯曲变形时都可以形成输出工作能力，即双面作用的绝缘压电振子。阐述了由一个绝缘压电振子形成两个工作腔体的双作用压电泵结构。根据小挠度弹性弯曲理论导出了绝缘圆形复合压电振子的弹性曲面微分方程，阐述了绝缘处理方案和过程，并对其绝缘特性进行分析。对绝缘压电振子进行了实验测试，实验结果表明：双作用绝缘压电振子不仅具有绝缘特性,而且具有良好的韧性和强度；其击穿电压比未绝缘处理压电振子的击穿电压提高了20～30V。为相关产品开发和科研提供了一种新型双面作用的压电驱动元件。

Research of insulated bimorph in piezoelectric pump with double functions

In order to improving piezoelectric pump’s work efficiency a insulated bimorph with double functions is proposed through processing insulation of bimorph. The insulated bimorph as driving piezoelectric pump’s component can curve on two directions and form the outputs. A double functions piezoelectric pump’s structure is expounded that a insulated bimorph forms two antrums. Some elastic curved surface differential equations of insulated circular piezoelectric composite laminates are derived from the elastic thin plate bending theory with small deflection. The project and course of insulated process of bimorph were introduced and analyzed. The experimental results showed that the Insulated bimorph not only has insulated characteristic but also favorable tenacity and consideration. Its attack voltage advances 20～30V than uninsulated bimorph. A new piezoelectric component with double function is offered for correlative manufacture and scientific research.