Performance research on double-valved and three-valved piezoelectric pumps with double series-wound chambers

By analyzing the working principles and structures of double-valved and three-valved piezoelectric pumps with double series-wound chambers,it was proved that the output ability of three-valved pump is better than that of double-valved pump.To explain the theoretical analyis,the pump samples were designed and manufactued,several experiments had been done when inlet chamber and outlet chamber work respectively,and the sum of flowrates was compared with that produced by their double chambers working together alternately.Experimental results show that double-valved and three-valved piezoelectric pumps' maximal output flowrates are 972 ml/min and 1 035 ml/min,maximal output pressures are 28.7 kPa and 40 kPa,and maximal self-suction heights are 0.41 mH2O and 0.43 mH2O,respectively when they are powered by AC 200 V,which indicates that the results agree with the theory very well.