Structure design and characteristics analysis of a cylindrical giant magnetostrictive actuator for ball screw preload

作     者：JU Xiao-jun LIN Ming-xing FAN Wen-tao BU Qing-qiang WU Xiao-jian 鞠晓君;林明星;范文涛;卜庆强;吴筱坚

作者机构：Key Laboratory of High-efficiency and Clean Mechanical Manufacture of Ministry of EducationSchool of Mechanical EngineeringShandong UniversityJinan 250061China 

基　　金：Project(51475267) supported by the National Natural Science Foundation of China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2018年第25卷第7期

页      码：1799-1812页

摘      要：In order to achieve automatic adjustment of the double-nut ball screw preload, a magnetostrictive ball screw preload system is proposed. A new cylindrical giant magnetostrictive actuator （CGMA）, which is the core component of the preload system, is developed using giant magnetostrictive material （GMM） with a hole. The pretightening force of the CGMA is determined by testing. And the magnetic circuit analysis method is introduced to calculate magnetic field intensity of the actuator with a ball screw shaft. To suppress the thermal effects on the magnetostrictive outputs, an oil cooling method which can directly cool the heat source is adopted. A CGMA test platform is established and the static and dynamic output characteristics are respectively studied. The experimental results indicate that the CGMA has good linearity and no double-frequency effect under the bias magnetic field and the output accuracy of the CGMA is significantly improved with cooling measures. Although the output decreased with screw shaft through the actuator, the performance of CGMA meets the design requirements for ball screw preload with output displacement more than 26 μm and force up to 6200 N. The development of a CGMA will provide a new approach for automatic adjustment of double-nut ball screw preload.

主 题 词：ball screw preload cylindrical giant magnetostrictive actuator (CGMA) structure design output characteristics 

学科分类：080202[080202] 08[工学] 0802[工学-机械学] 

核心收录：

D　O　I：10.1007/s11771-018-3870-0

馆 藏 号：203309964...