一种用于人工心脏的快速换向阀的设计

摘要

To automatic reversing valve, high frequency, fast response speed and no hydraulic impact for the commutation, low noise are contradictory. In order to improve automatic reversing valve reversing frequency and reduce commutation delay time, and to ensure the stable reliable reversing without hydraulic clamping and hydraulic impact phenomena, a quick reversing electric valve for artificial heart was designed and made. The theoretical analysis shows that by changing the hole size, this quick reversing electric valve can be applied in many occasions. Experiments show that when the commutation frequencies are 24 and 82 times/min, using the fast reversing valve, the artificial heart blood pressure waveform is stable. It is shown that the stable and reliable fast directional valve can apply to high frequency occasions such as artificial heart.%自动换向阀的换向频率高、 换向响应速度快与换向平稳无液压冲击、 噪声低是互相矛盾的. 为了提升自动换向阀的换向频率和减少换向延迟时间, 并保证换向可靠无液压卡紧现象、 稳定无液压冲击现象, 设计并制作了一种用于人工心脏的快速换向电动阀. 理论分析表明: 通过改变阀通孔尺寸, 此快速换向电动阀在大、 小流量场合均能适用; 实验结果证明: 快速换向阀在换向频率为24次/min和82次/min时, 人工心脏血压波形稳定, 表明此快速换向阀能稳定可靠适用于高频的人工心脏等场合.