The Experimental Research On Piezoelectric-stack Pumping Using Displacement Amplification

In recent years,all sorts of piezoelctric-pumps of different purpose have been made.This paper,baseed on looking back to trailblazers'production,proposes a new type of piezoelectric-pump driven by piezoeletric-stack using displacement Amplification. IntroductionThis part gives us a mainly introduction to the piezoelectric-pump about home and abroad,and expatiates the characteristics and the working principles,and analyses the development trend.The piezoelectric-pump driven by piezoelectric-stack is a newly development trend,it can accommodate frequency and pressure in a large scale and control the output flux in precision.This pump will widely apply to transfusion,feed oil and clean the equipment in industrial automation,and scientific research,lab, chemical preparation and cooling of CPU etc.Driven Theory of Piezoelectric-stackBecause the piezoelectric-stack is the core part of the pump that we designed,we should pay more attention to driven principle of the piezo-stack so that we can using it correctly.This paper introduces piezoelectric material and interrelated parameter,output characteristic and driven principle and driving type of piezoelectric-stack.Piezoelectric-stack can give more output displacement and pressure and have more rate of conversion and more stability than bimorph type.it has been used to all kinds of driving places.Design of Displacement AmplificationWe design displacement amplification because of the little displacement output of the piezo-stack.This paper analyses the disadvantage and advantage of all sorts of amplification,and proposes a new type of displacement amplification based on...