title: A screw-thread-type ultrasonic actuator based on a Langevin piezoelectric vibrator.
abstract: A novel screw-thread-type ultrasonic actuator based on a Langevin piezoelectric vibrator, with an assembly comprised a threaded shaft, is presented. The bolt-clamped Langevin vibrator consists of 4 chips of PZT ceramics and generates more energy with a certain input power. The threads of the stator multiply the linear force and position resolution, and the threaded rod is rotated directly to achieve linear movement without additional mechanical conversion. The actuator was designed and optimized using the Finite Element Method (FEM), and a prototype was fabricated. At 300 Vp-p, the maximum thrust force, velocity, and efficiency were approximately 4.2 N, 9.5 mm s(-1), and 5.6%, respectively.
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Xiangcheng
authors.initials: X
authors.lastname: Chu
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Jiawei
authors.initials: J
authors.lastname: Wang
authors.affiliation: School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China.
authors.forename: Songmei
authors.initials: S
authors.lastname: Yuan
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Longtu
authors.initials: L
authors.lastname: Li
authors.affiliation: Paihe Science and Technology Holding Co., Ltd., Beijing 100083, China.
authors.forename: Hongchao
authors.initials: H
authors.lastname: Cui