基于电磁阀的小流量换向器修正方法研究

Research on Correction Method of Small Flow Diverter Based on Solenoid Valve

为了研究二位三通电磁阀在微小流量下的换向性能,研究中对某型电磁阀换向时间差开展了测试试验。试验结果表明电磁阀换向时间差为负值,且时间差随流量减小其绝对值增大。在高流量段电磁阀具有良好换向性能;而在低流量范围内,通过采用双衰减函数进行修正,可有效降低换向时间差引入的不确定度。研究表明:将电磁阀作为换向器应用于小流量液体流量标准装置具有较高可行性。

In order to study the performance of the two-position three-way solenoid valve as a diverter under a small flow rate, a test was conducted to investigate the diverting time difference of a certain type of solenoid valve. The test result shows that the diverting time difference of the solenoid valve is negative,and the difference increases as the flow rate decreases. The solenoid valve has good performance in high flow range. In the low flow range,the correction method by using a double exponential decay function, the uncertainty introducend by the diverting time difference can beeffectively reduce. The study shows that it is highly feasible to use a solenoid valve as a diverter for the standard facility for small liquid flow.