Piezo stack driven powder delivery device

Abstract

The invention provides a piezoelectric stack driven powder conveying device. The powder conveying device comprises driving platforms, a conveying pipe and conveying pipe fixation devices, wherein one end part of the conveying pipe is connected with one driving platform through one conveying pipe fixation device; the other end of the conveying pipe is connected with the other driving platform through the other conveying pipe fixation device; the driving platforms are used for applying an elliptic vibration to the conveying pipe to drive the conveying pipe to perform the elliptic vibration; and the conveying pipe is used for performing the elliptic vibration and then driving powder to move through frictional force to realize powder conveying. According to the powder conveying device, the whole conveying pipe performs the elliptic vibration, and the driving force on the powder at all parts of the pipe wall of the conveying pipe and the movements of the powder are same, so that powder interaction is greatly reduced and more diversified powder can be effectively conveyed by the conveying device.

Description

technical field [0001] The invention relates to the field of powder conveying, in particular to a powder conveying device driven by a piezoelectric stack. Background technique [0002] Traditional powder conveying devices have been developed relatively maturely, but these devices are generally large in size and high in noise, and are only suitable for conveying a large amount of powder. With the development of human productivity and the advancement of science and technology, especially in the fields of medicine, chemical industry, and food processing, there is an urgent need for quantitative and accurate delivery of a small amount of powder and miniaturization of delivery devices. [0003] Using the inverse piezoelectric effect of piezoelectric ceramics, electrical energy can be converted into mechanical energy. Various actuators and transmission mechanisms made based on this principle have the characteristics of small size, simple structure, high precision, and good control...

AI Technical Summary

Problems solved by technology

This device has good conveying and precise control effects on some powders such as corundum, etc., and has the advantages of simple structure, high control precision and low noise, but at the same time it requires that the energy absorption coefficient of the conveying pipe must be relatively large, and the size of the conveying pipe is not suitable. If it is too long, the characteristics of the powder will have a great influence on the conveying efficiency, and it will work at the resonance frequency, and the heat will be serious, so it cannot continue to work for a long time

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