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Study on Distributed High Specific Power Micro-engines

分布式高比功率微型发动机研究

基本信息

批准号：
02555045
负责人：
NAKAJIMA Naomasa
金额：
$ 3.9万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1992
项目状态：
已结题

项目摘要

1. Design of micro Stirling engineThe micro Stirling engine, a miniaturized Stirling engine the length, or height of whose body measured no more than several centimeters, was designed and fabricated. The steps taken both to establish the design concept and actually to produce a microactuator were investigated. Geometrical scale analysis and computer simulation are used to investigate how the design parameters change when the engine size was reduced. This analysis and simulation enable a micro Stirling engine with an approximately 50 ml piston swept volume to be produced. The output power is approximately 10mW at 100K temperature difference, and specific power is about 1W/kg.2. Light driven micro actuatorWe designed and fabricated light driven micro actuators which was intended to use as array of distributed high specific power actuators. The light driven micro actuator is a microcell which has a membrane actuated by heated working fluid(Freon 113). Heat is supplied by semiconductor laser through an optical fiber. The membrane is 0.8 mm square and 0.8mm thickness, and made of NICrSI. The maximum displacement of the membrane measured 35mm at 50mW laser power, and the microcell could respond at 5Hz pulsative laser input.3. Application of an array of the actuatorsA laser light driven micromechanical pump for fluid has been designed and fabricated. The pump consists of an array of the microcells. These are covered by a thin glass plate with a 18 mm gap which makes a flow channel. The experiment driven by pneumatic pump instead of laser light showed reasonable pump performance, but the one driven by light was not satisfied results because of delay of working gas cooling.A guide mechanism of a medical catheter using array of the microcell was also investigated.

1.微型斯特林发动机的设计微型斯特林发动机，一个小型化的斯特林发动机的长度，或其身体的高度测量不超过几厘米，设计和制造。研究了建立设计概念和实际生产微致动器所采取的步骤。采用几何缩尺分析和计算机模拟的方法研究了发动机尺寸减小后设计参数的变化。该分析和模拟使得能够生产具有大约50 ml活塞扫掠体积的微型斯特林发动机。在100 K温差下，输出功率约为10 mW，比功率约为1 W/kg.光驱动微致动器我们设计并制作了光驱动微致动器，用于分布式高比功率致动器阵列。光驱动微致动器是具有由加热的工作流体（氟利昂113）致动的膜的微单元。半导体激光器通过光纤提供热量。膜为0.8mm见方，0.8mm厚，由NICrSI制成。在50 mW的激光功率下，膜的最大位移为35 mm，微电池对5 Hz的脉冲激光输入有响应.驱动器阵列的应用设计并制作了一种激光驱动的微机械流体泵。该泵由微单元阵列组成。这些由具有18 mm间隙的薄玻璃板覆盖，该间隙形成流动通道。实验结果表明，用气动泵代替激光驱动可以获得较好的抽运效果，而光驱动由于工作气体冷却延迟，抽运效果不理想。