Development of High-Speed Giant-Magnetostrictive Actuator with a Stroke-Amplifier and Its Application to Diesel Fuel Injectors

带行程放大器的高速超磁致伸缩作动器的研制及其在柴油机喷油器上的应用

• 批准号: 07455111
• 负责人: TANAKA Hirohisa
• 金额: $ 2.69万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455111/
• 关键词: Giant Magnetostrictive Alloy; Linear Actuator; Mechatronics; Magnetic Field Analysis; Fluid Power Control; ソニア アクチュエータ; メカトロニクス

Electro-hydraulic switching-valves are used in the pulse-flow control system of automotive transmission or construction manipulator. The control qualities, precision and quietness are improved by quickening the switching speed. The giant-magnetstrictive material actuator (Te_<0.3>Dy_<0.7>Fe_<1.9>) stretches its length in proportion to the magnitude of magnetic field with a natural angular frequency of over 1.2kHz. It has the mechanical properties of maximum strain of 1500-2000*10^<-6>. The displacement of 35mm is provided by using 70mm in length of the device at the strain of 500*10^<-6> in usual magnetization. This displacement is not so sufficient to control the usual switching-valve of flow capacity of 8l/min at 7MPa. For applying this device to control the valve, two types of hydraulic stroke-amplifiers based on the Pascal's principle are designed and tested. One is a combination of large and small pistons, the other is a set of metal-bellows. The both mechanisms amplify the stroke through the fluid enclosed in the primary and secondly chambers. This research presents the comparison of performance of both types in the points of response, stiffness, amplifying-ratio and adaptability to the electro-hydraulic switching-valve. The test result is that the piston-type actuator can control the pressure of 3-port-switching-valve at the PWM carrier frequency of 300Hz. Furthermore, its application to diesel fuel injection valves is discussed and a basic design of the injector using the giant-magnetostrictive actuator is presented.

电液开关阀用于汽车变速器或工程机械手的脉冲流量控制系统。通过加快切换速度，提高了控制品质、精度和静音性。超磁致伸缩致动器（Te_<0.3>Dy_<0.7>Fe_<1.9>）的长度与磁场的大小成正比，其固有角频率大于1.2kHz。它具有最大应变为1500-2000 × 10 - 4的力学性能<-6>。在通常磁化下，在500 × 10 ↑ [3]的应变下，通过使用70 mm长的器件提供35 mm的位移<-6>。该排量不足以控制在7 MPa下流量为8l/min的常用开关阀。为了将该装置应用于阀门控制，设计了两种基于帕斯卡原理的液压行程放大器，并进行了试验。一种是大小活塞组合，另一种是一套金属波纹管。这两种机构通过封闭在主腔室和副腔室中的流体来放大冲程。本文从响应特性、刚度、放大比以及对电液开关阀的适应性等方面对两种类型的电液开关阀进行了性能比较。试验结果表明，该活塞式执行器能够在300 Hz的PWM载波频率下实现对三通开关阀的压力控制。讨论了超磁致伸缩致动器在柴油机喷油阀中的应用，提出了超磁致伸缩致动器喷油器的基本设计方案。

项目成果

Yasukazu Sato: "Fluid Power Control by Electro-hydraulic Proportional Seat Valves" Proceedings of the 3rd JHPS International Symposium on Fluid Power Yokohama'96. 313-318 (1996)

Yasukazu Sato：“电液比例座阀的流体动力控制”第 3 届 JHPS 国际流体动力横滨研讨会96 论文集。

Hirohisa Tanaka: "Fluid Power Control Technology" JSME International. 37. 629-637 (1994)

Hirohisa Tanaka：《流体动力控制技术》JSME International。

田中裕久: "建設機械用電子油圧マニプュレータの研究" 日本機械学会論文集C編. 61. 1078-1083 (1996)

Hirohisa Tanaka：“工程机械电动液压机械手的研究”日本机械工程学会会刊，C版61。1078-1083（1996）。