Ultrasonic Vibration Friction Reduction in Pneumatic Actuators
H. Gao 1, 2, T. Cheng 3, G. Bao 1, M. De Volder 2, D. Reynaerts 2
1 Harbin Institute of Technology, Harbin, China
2 Katholieke Universiteit Leuven, Leuven, Belgium
3 Changchun University of Technology, Changchun, China
Piston–cylinder actuator is one of the most commonly used actuators in automation. In order to suppress leakage, these actuators require seal rings which unfortunately introduce friction, which affects the positioning accuracy and output force. In this article, ultrasonic vibration is investigated as a way to reduce this friction. A compact cylinder pneumatic actuator with a bore diameter of 5 mm and a stroke of 10 mm was fabricated. The cylinder was designed to accommodate two piezoelectric stacks. The latter are used to excite vibration modes in the cylinder in order to reduce friction. Dry friction measurement shows a 52.2% reduction from the original friction at a driving frequency of 106 kHz and vibration amplitude of 0.09 μm. In the wet friction experiments, the friction force can be reduced by 66.9% from the original friction within vibrations at amplitude of 0.11 μm.
ACTUATOR 2014 Manuscript Poster 46
Publication date: 10/04/2015
Manuscript Poster 46 published in Conference Proceedings ACTUATOR 2014
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