Design And Performance Analysis Of A New Type Of Volumetric Flowmeter

During the industrial automation,flow instrument is one kind of the automation meters widely used in metallurgy.Because every flow meter has its advantage.Up to now,there's no flow meter which can be used in all function,for every kind of flow meter has its limitation to the mediator,the characteristic of the outflow variation and the capability to adapt to the environment.Although new types of flow meters appear, the traditional ones are still in use and play an important roll in modem measurement control system.This thesis designed a new type of volumetric flow meter --shaped-chamber flow meter and analyzed the performance of the flow meter.The shaped-chamber flow meter consists of an inner shaped-chamber cylinder with an inlet,an outlet and a guide groove,an upside cover plate,a downside cover plate and a rotor with cruciform slot and two units of slide plate with elastic elements. The cylinder with shaped-chamber inner composes of a 1/4 elliptical,1/2 great circle, 1/4 small circle and a ladder flat surface.This structure prevents the flow meter from contra rotating,and makes compensation for wear.The thesis introduces the operating principle of the flow meter,the subsequence of the package and the matters need attention during design.After treatment,find there's a problem in the slide plate and put forward a plan to improve.During the thesis,I consider about the three questions we should consider(1) Friction resistance.The attrition abrasion happened during the process of flow meter. (2)Coriolis acceleration.Because slide plate do translational slip in the cruciform slot and at the same time rotate with the rotor,so generate Coriolis acceleration.Then discussed the impaction the inertia force on the intensity of the slide plate.(3)Vibration.The vibration mainly happened in the 1/4 elliptical.I analyzed the situation of the vibration and the element which creates the vibration and put forward method to reduce vibration..The thesis analyzed the error characteristic of the shaped-chamber flow meter based on the analysis of the volumetric flow meter.Take out a scheme to standardize the flow meter.The normal operation of the flow meter shows the rightness of the principle and the structure.At last,I present the recommendation on the improvement of the measuring system.