86. New damper design for noise control of washing machine

Guang-qing Lu1, Dong-mei Pang2

MOE Key Lab of Disasters Forecast and Control in Engineering, Jinan University, Guangzhou, China

1Corresponding author

E-mail: 1tgqluyp@jnu.edu.cn, 2tpangdm@jnu.edu.cn

(Received 12 February 2016; accepted 19 April 2016)

Abstract. A fully automatic washing machine with vertical pulsator and 10 kg load capacity has most violent shake and or vibration, and worst dynamic stability, which result in maximum noise in dehydration. The mechanisms of noise generation and motions at stage of dehydration are analyzed. Dynamic impacting excitation is firstly clarified as the most important dominant factor in understanding acoustic behavior of the washing machine at the stage. A new damper is developed and designed on the basis of improving the degree of harmonics (DOH) of dynamic impacting force, which is employed as the critical criterion for damper design. Applying the damper developed reduces the washing machine noise 2.2 dB(A) and 4.7 dB(A) under conditions of normal and worst unbalance respectively.

Keywords: washing machine, damper, noise control, dynamic impact force.

References

[1]        Liu S. Current state and strategies of home-appliances. Commercial Products and Quality, Issue 2, 2012, p. 307‑307.

[2]        Song J. N. Specifications for “vibro-performances of washing machines” – guides for vibration reduction. Home Appliances, Issue 1, 2012, p. 37‑37.

[3]        Wang Z. W., Wu H. H. Analysis and simulation on dynamic characteristics of top‑loading washing machine. China Mechanical Engineering, Vol. 13, Issue 23, 2002, p. 2033‑2035.

[4]        Chen S. T., Yue J. S., Xu Z. G. Detailed explanation on testing data of noise and vibration for washing machines. Technology of Home Appliances, Issue 7, 2015, p. 34‑36.

[5]        Zheng H. M., Liu Z. S., Li Z. Y. Experimental study on vibro-analysis and vibration reduction of new type of slant axial washing machine. Experimental Mechanics, Vol. 19, Issue 4, 2004, p. 477‑482.

[6]        Xu C., Zhuo Y. Y., Li X. C. Vibration and noise control of drum washing machine. Environmental Engineering, Vol. 26, Issue 1, 2008, p. 57‑60.

[7]        Zheng H. M., Liu L., Jia W. Y. Application of WBS to noise reduction of washing machine. Light Industrial Machines, Vol. 25, Issue 1, 2007, p. 122‑124.

[8]        Gu Q. K., Zhang S. P., Li C. Y., et al. Development on washing machine with low vibration and noise. Noise and Vibration Control, Issue 5, 2003, p. 42‑44.

[9]        Liu B., Feng T., Wu X., et al. Analysis on working deformations and noise at low frequencies of slant drum washing machine. Noise and Vibration Control, Issue 3, 2010, p. 50‑54.

[10]     Gu C. L., Zhou F. C., Xiang H. Y. Analysis on vibrational and noise issues of drum washing machines. Proceedings of National Conference on Home-appliances, Ningbo, Zhejiang, China, 2014, p. 386‑391.

[11]     Xu Z. G., Lu J. G., Zhao W. B., et al. Investigation on Criterions in grades of vibro-performance tests for washing machines. Electric Equipments, Supplement, S1, 2011, p. 238‑241.

[12]     Assembling Structure of Dampers for Washing Machine. LG Electronics, Inc., Patent No. 200410031382.0, 2004.

[13]     Dampers of Washing Machine. LG Electronics, Inc., Patent No. 200410043167.2, 2004.

[14]     Dampers and its Control Method of Washing Machine. LG Electronics, Inc., Patent No. 200510006555.8, 2005.

[15]     Damper Components of Drum Washing Machines. Lejin Electronics (Tianjing) Co., Patent No. 200410018886.9, 2004.

[16]     Damper Used for Washing Machine. Hitachi Production Co. Ltd., Patent No. 200510076213.3, 2005.

[17]     Hydraulic Damper of Drum Washing Machine. Lejin Electronics (Tianjing) Co., Patent No. 200510013753.7, 2005.

[18]     Masiro K. T. Noise reduction of fully automatic washing machine. Home Appliances, Vol. 65, Issue 4, 1991, p. 39‑42.

[19]     Tatsmi H., Ito M. Vibration control methods of automatic washing machines. Noise Control, Vol. 9, Issue 1, 1985, p. 29‑33.

[20]     Wu H. X., Dong G. Z., Qin L. G., et al. Modification of spider gear back to uniform the stress and improve the anti-wear performance of a real thrust washing machine. Engineering Failure Analysis, Vol. 60, 2016, p. 107‑116.

[21]     Nashif A. D., Jones D. G. Vibration Damping. A Wiley-Inter-Science Publication, 1985.

[22]     Sun J. C. Principle of Mechanical Noise Control. Northwestern Polytechnology University Press, 1993.

Cite this article

Lu Guang‑qing, Pang Dong‑mei New damper design for noise control of washing machine. Journal of Measurements in Engineering, Vol. 4, Issue 2, 2016, p. 43‑51.

 

Journal of Measurements in Engineering. June 2016, Volume 4, Issue 2

© JVE International Ltd. ISSN Print 2335-2124, ISSN Online 2424-4635, Kaunas, Lithuania