A Study on the Dynamic Behaviour of an Automatic Washing Machine

Hwang, Seonhong; Lee, Jun Young; Suzuki, Seiichirou; Hur, Woon Gu

doi:10.1299/jsmeenv.2001.11.131

Cited by 3 publications

(2 citation statements)

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“…The authors [25] analyzed an ABD with several chambers in the form of successive concentric annular cavities, which were supposed to increase the balancing properties of the liquid. Suzuki S. et al [26] developed a numerical model of mass distribution in a washing machine with a liquid balancer. Mitsuishi, M. et al [27] estimated the force generated by the fluid balancer from the observed load values for the entire rotating structure.…”

Section: Introductionmentioning

confidence: 99%

The Inertial Disturbances of Fluid Movement in the Chamber of a Liquid Autobalancer

Lozynskyi,

Shihab,

Drach

et al. 2024

Machines

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This article analyses the problem of automatic balancing rotors with a liquid balancer, which is a cylindrical chamber partially filled liquid of a certain density. This problem is related to the problem of the dynamics of bodies with cavities partially filled with liquid. As part of this task, we analyzed disturbances in the relative motion of the fluid in the ABD chamber caused by the Coriolis force inertia. The distortions of the free surface of the liquid were found, resonant phenomena in the flow of the working fluid were investigated, and the physical explanation of the received results given should be taken into account when designing the corresponding ones self-balancing devices. It was established that the axial component of the Coriolis inertial force causes peculiar wave phenomena in the correcting fluid movement. For the given nature of undisturbed motion, the conditions of this phenomenon’s occurrence are determined only by the geometric dimensions of the cylindrical chamber and the thickness of the liquid layer in undisturbed motion, and do not depend on the intensity of rotation of the liquid, nor on its density. It is shown that a decrease in the “ABD chamber height–radius” ratio leads to stabilization of the movement of the system. Experimental verification has been performed; theoretical results on the developed stand for work research rotor system with a vertical axis of rotation.

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Section: Introductionmentioning

confidence: 99%

The Inertial Disturbances of Fluid Movement in the Chamber of a Liquid Autobalancer

Lozynskyi,

Shihab,

Drach

et al. 2024

Machines

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“…The approaches and the results of E. L. Thearle's work formed the basis of the following studies: J. Larry, O. Gusarov [5], V. P. Nesterenko [6], H. S. Hoon, L. J. Young, S. Suzuki [7], Ye. M. Pashkov [8,9], C. H. Jung, C. S. Kim, Y. H. Choi [10], M. A. Langthjem, T. Nakamura [11], M. W. M. Cunico, [12] H. W. Chen, W. X.…”

Section: Introductionmentioning

confidence: 99%

Passive Balancing of the Rotor with an Auto-Balancing Device with a Viscous Incompressible Liquid

Drach

Royzman

Bubulis

et al. 2021

mech

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The use of liquid auto-balancers to compensate the operational changes in the imbalance of rotary systems without stopping them is of interest because of the relative structural simplicity of these devices, which are passive direct-acting regulators that do not require power supply and control systems to move correction masses. The experience of the study of passive auto-balancing devices (SBD) indicates that the existing theory (statements) of passive automatic balancing of the fluid is idealized and inaccurately describes the processes that occur with the working bodies during their operation. In particular, the lack of studies on the effect of liquid viscosity on the efficiency of self-balancing and the reasonableness of the selection of liquid during the development of fluid SBD demanded to analyse the operation of liquid SBD in the real system, taking into account the influence of liquid properties on the efficiency of the vertical rotor balancing process. It is shown that the efficiency of balancing increases with the approach of the angular velocity to the critical one and with the increase of the external resistance. The massive forces of the working fluid have less effect on the balancing efficiency than the viscosity for liquid SBDs.

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Experimental and Analytical Investigation on a Liquid Balance Ring for Automatic Washing Machines

Urbiola-Soto¹,

López-Parra

2010

ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 5

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A high-speed camera and a Particle Image Velocimetry (PIV) technique are used on a transparent liquid balancing device typical of modern washing machines. Experimental results indicate that the baffles placed inside the ring cavity interact with the fluid for it to develop modes of vibration of circumferential and axial type, thus rendering a complex swirl flow inside the annular cavity comprised of two inertial waves. One of such waves travels backwards relative to the rigid body motion. As as a result, a damping effect is induced and a phase lag with respect to the exciting unbalance occurs. An analytical dynamic model of the unbalanced response is derived and correlated with fluid flow visualization experiments and vibration measurements.

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A Study on the Dynamic Behaviour of an Automatic Washing Machine

Cited by 3 publications

References 0 publications

The Inertial Disturbances of Fluid Movement in the Chamber of a Liquid Autobalancer

The Inertial Disturbances of Fluid Movement in the Chamber of a Liquid Autobalancer

Passive Balancing of the Rotor with an Auto-Balancing Device with a Viscous Incompressible Liquid

Experimental and Analytical Investigation on a Liquid Balance Ring for Automatic Washing Machines

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