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A system for powder transport based on piezoelectrically excited ultrasonic progressive waves

机译:基于压电激发超声渐进波的粉末传输系统

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摘要

The transport and dosage of granular materials are an important part of Process Engineering. Thereby, the food, chemical, pharmaceutical and coating industries set high demands on the transport and dosage performances of the used plants. In this context, Ultrasound Process Technology in the past years has developed itself into an attractive alternative compared to presently used classical technologies.This paper describes the application of ultrasonic progressive waves in a powder-feeding device. The use of a specific pipe material with appropriate damping characteristics allows to generate a progressive wave using a single piezoelectric actuator. Small objects can be carried along the surface of a pipe by the elliptic motion at the surface, which is the result of a flexural progressive wave. The operational principle is the same as in travelling wave ultrasonic motors.It was experimentally confirmed that the device can be used for feeding and supplying small amounts of powder. The powder-fed performance, however, strongly depends on environmental conditions, so that a control of the system is required. Construction and characteristics of a trial device are shown. (C) 2004 Elsevier B.V. All rights reserved.
机译:颗粒材料的运输和剂量是过程工程的重要组成部分。因此,食品,化学,制药和涂料工业对用过的植物的运输和剂量性能提出了很高的要求。在这种情况下,与目前使用的经典技术相比,超声波处理技术在过去几年中已发展成为一种有吸引力的替代方法。本文介绍了超声波渐进波在粉末进料装置中的应用。使用具有适当阻尼特性的特殊管道材料可以使用单个压电致动器产生渐进波。小物体可以通过弯曲的渐进波在管道表面通过椭圆运动而被携带。其工作原理与行波超声马达相同,经实验证实该装置可用于进料和进料少量粉末。但是,粉末进料的性能在很大程度上取决于环境条件,因此需要对系统进行控制。显示了试用装置的结构和特性。 (C)2004 Elsevier B.V.保留所有权利。

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