Rotordynamic Instabilities in Washing Machines

Drüke, Simon; Bicker, Rainer; Schuller, Bernd; Henke, Christian; Trächtler, Ansgar

doi:10.1007/978-3-319-99268-6_27

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…A mathematical model of the dynamic system of the washing machine was created, which was used to analyze the dynamics and optimize the parameters of the machine using the technology of rigid-flexible connection [12]. The report [13] investigates the rotor-dynamic effects for horizontal front-loading washing machines. Also noteworthy are the methods of damping washing machines using magneto and electro-rheological fluids [14].…”

Section: Introductionmentioning

confidence: 99%

Design Principles of Horizontal Drum Machines with Low Vibration

Drach¹,

Горошко²,

Dwornicka³

2021

Adv. Sci. Technol. Res. J.

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Using the example of washing machines using the linear theory of vibrations, the dynamics of horizontal rotary drum machines is investigated and the basic requirements for their layout are formulated to reduce vibration activity. The mathematical equations of vibrations of the multiply connected system tub-drum on elastic suspensions are compiled for main types of washing machines and centrifuges with horizontal axis of rotation. The problem is solved in a linear setting based on the Lagrange equation of the second kind. The accuracy and adequacy of the mathematical model was tested directly on a full-scale object by measuring noise, vibrations, support forces and stress distribution in individual elements and units of the washing machine in the entire range of drum rotation frequencies. Investigations of the nature of system vibrations depending on changes in the position and attachment points of elastic and damping elements were carried out using simulation in the Simulink environment. As a result of the research, the basic requirements for the layout of horizontal rotary drum machines were experimentally confirmed. Experimental verification was carried out to confirm the results obtained. It has been experimentally proven that the improvement of the experimental setup to reduce its vibration activity increases the efficiency of using direct-acting liquid autobalancers.

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Section: Introductionmentioning

confidence: 99%

Design Principles of Horizontal Drum Machines with Low Vibration

Drach¹,

Горошко²,

Dwornicka³

2021

Adv. Sci. Technol. Res. J.

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“…Drüke et al [ 21 ] modeled the door gasket as a linear spring–damper element as well. They focused on the potential causes of rotordynamic instabilities without evaluating the effect of the gasket.…”

Section: Introductionmentioning

confidence: 99%

Washing Machine Dynamic Model to Prevent Tub Collision during Transient State

Sánchez-Tabuenca

Galé

Lladó

et al. 2020

Sensors

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In horizontal-axis washing machines, the front gasket as well as the damping system are crucial owing to the possible collision of the tub with the housing during the transient period. However, most dynamic models for predicting tub motion focus on the steady state and consider only the suspension system without including the gasket. We conducted an experimental study to analyze the effect of the gasket on the transient motion of the tub. The results obtained indicate the necessity of implementing the gasket in the multibody model of a washing machine to accurately predict the tub behavior during this period. The gasket model is formed by a combination of Voigt elements. Stiffness parameters are determined using a load cell, and damping factors are estimated using a process that integrates Adams/View, Matlab optimization algorithms, and displacement measurements that are taken using accelerometers. A D-optimal design used to predict the effect of the gasket parameters reveals that the tub displacement is most sensitive to the changes in linear stiffness in the transversal direction. Finally, the model of the gasket provides a better approach for predicting the tub movement during resonance that can be used in the design phase to avoid tub collision.

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Rotordynamic Instabilities in Washing Machines

Cited by 2 publications

References 17 publications

Design Principles of Horizontal Drum Machines with Low Vibration

Design Principles of Horizontal Drum Machines with Low Vibration

Washing Machine Dynamic Model to Prevent Tub Collision during Transient State

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