作　　者： ; ; ; (曹炳鑫）;

机构地区： 南京航空航天大学

出　　处： 《振动．测试与诊断》 2014年第6期1072-1079,1170,共8页

摘　　要： 为分析半球缺阻流体无阀压电泵中阻流体半球缺的绕流阻力的大小及变化规律对泵输出性能的影响,对阻流体作用规律进行了试验研究。首先,建立了两个半球缺纵向遮流系数及流阻系数的计算公式;其次,递推出多个半球缺纵向排列遮流阻力作用规律;最后,建立了任意多个半球缺纵向流阻系数的关系式。通过对纵向排列半球缺的流阻及泵流量试验,验证了该关系式的正确性;同时,在驱动电压为120V、频率为6Hz时,置入4个半球缺得到了43.89mL/min的最大泵流量,理论与试验流量变化趋势一致。研究表明,半球缺纵向流阻系数关系式可用于半球缺无阀压电泵的流阻及泵流量计算,球缺数量与泵流量呈正相关。 In order to analyze the influence of the magnitude of flow resistance and its variable rules of hemisphere-segmentbluff-body(HSBB) on pump output performance in a valveless piezoelectric pump with HSBB,experimental research on the acting law of HSBB is carried out.The longitudinal flow cover coefficient and the flow resistance coefficient calculation formula are established.Then,the flow cover resistance acting law of multiple hemisphere-segments in longitudinal alignment is obtained.Finally,the longitudinal relational expression of any number of hemisphere-segments is established,and the validity of the expression is validated based on flow resistance and pump flow experimental research of hemispheresegments in longitudinal alignment.The maximum pump flow of 43.89 ml/min is obtained at driving voltage 120 V and frequency 6 Hz with four hemisphere-segments in the pump.This experimental flow variation trend is consistent with the theory.This researchshows that longitudinal flow resistance coefficient relational expression of hemisphere-segments is available for the calculation of flow resistance and pump flow of the valveless piezoelectric pump with HSBB.The number of hemisphere-segmentsis positively correlated with pump flow.The conclusion has practical significance for analyzing and adjusting pump flow.

关 键 词： 无阀 压电泵 半球缺 阻流体 阻力系数 遮流系数

领　　域： [机械工程] [机械工程]