Abstract
This paper discusses a method for vibration isolation of a vertical axis automatic washing machine with a hydraulic balancer. First, a way to isolate vibration through a small amplitude of the suspension rod’s axial force is proposed, and a base circle of a cone along which the lower joint of a suspension rod moves is discussed. Based on the circle, a geometric constraint involving the slant angle of the suspension rod, the deflection angle of the washing/spinning assembly, the suspension radius of the tub and the eccentricity of the system at the steady state is derived. Considering that the trace along which the suspension rod moves is also affected by the dynamics of the system, a governing equation satisfying the equilibrium conditions of the centrifugal forces and torques is obtained. Combing the geometric constraint and governing equation together achieves a general governing equation for vibration isolation of the system. Finally, the general governing equation is proven by simulations, and the relations between the optimal installing height and several parameters are discussed.
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This paper was recommended for publication in revised form by Editor Yeon June Kang
Hai-Wei Chen, Ph.D, is currently an Associate Professor at the School of Mechanical Engineering, Jiangnan University, China. His research interests include stability analysis and vibration control, finite element modeling and design, nonlinear dynamical systems, computer-aided design and manufacturing.
Wei-Xi Ji, Ph.D., is currently a professor at the School of Mechanical Engineering, Jiangnan University, China. His research interests include modern integrated manufacturing; enterprise resource planning; computer-aided design and manufacturing.
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Chen, HW., Ji, WX., Zhang, QJ. et al. A method for vibration isolation of a vertical axis automatic washing machine with a hydraulic balancer. J Mech Sci Technol 26, 335–343 (2012). https://doi.org/10.1007/s12206-011-0812-2
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DOI: https://doi.org/10.1007/s12206-011-0812-2