新型非牛顿流体减振器对滚筒洗衣机减振降噪效果的研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (15) : 311-322.

论文

宋元锦1,2，庄重2，程帜军2，蒋卫斌2，王先平2，方前锋2

作者信息 +

Vibration and noise reduction effect of new type non-Newtonian fluid damper on drum washing machine

SONG Yuanjin1,2, ZHUANG Zhong2, CHENG Zhijun2, JIANG Weibin2, WANG Xianping2, FANG Qianfeng2

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文章历史 +

摘要

滚筒洗衣机通常采用的摩擦式减振器在低载荷高频脱水时减振效果不理想，导致了洗衣机机壳产生了剧烈振动。针对这一问题，本文提出了一种新型非牛顿流体变阻尼减振器，基于非牛顿流体剪切稀化特性和阻尼器孔内一维粘性流动方程研究了其对洗衣机运行时的振动抑制效果及物理机制。相对传统的固态摩擦式减振器，非牛顿流体具有明显的剪切稀化特性，使得在高频工况下非牛顿流体变阻尼减振器的输出阻尼力显著减小，克服了传统减振器高频表观弹性系数增大的缺陷。系统研究了不同结构参数的减振器对洗衣机低负载偏心运行下的减振作用，证明了较小的间隙高度更有利于振动能量的耗散，适当增大非牛顿流体的粘度或增加阻尼头的数量可以增强振动抑制效果，同时也可以起到良好的降噪功效。结果表明，通过合理的阻尼结构设计与非牛顿流体配比，变阻尼减振器可以对洗衣机整个洗涤过程尤其是高频甩干环节产生良好的减振效果，加速度衰减比最高可达83.49%，能量衰减了98.44%，噪音降低了10.38dB。

Abstract

Typically used in drum washing machines, the friction damper has an insufficient damping effect at low load and high-frequency dewatering, which causes the washing machine shell to vibrate severely. In order to address this problem, a novel type of non-Newtonian fluid variable damping damper is proposed in this paper. Based on the non-Newtonian fluid shear thinning properties and the one-dimensional viscous flow equations in the damper holes, the vibration suppression effect and the physical mechanism of the washing machine during its operation were investigated. The non-Newtonian fluid has apparent shear thinning characteristics when compared to the conventional solid-state friction damper, which significantly reduces the output damping force of the non-Newtonian fluid variable-damping damper and fixes the drawback of the conventional damper that the apparent elastic coefficient rises at high frequencies. A systematic investigation of the vibration damping effect of dampers with various structural parameters on the low load eccentric operation of a washing machine shows that a smaller gap height is more advantageous for the dissipation of vibration energy and that appropriately increasing the viscosity of the non-Newtonian fluid or the number of piston heads can enhance the vibration suppression effect while also being beneficial for noise reduction. The results demonstrate that the variable damping damper can produce a good vibration damping effect for the entire washing process of the washing machine, especially for the high-frequency drying process, and the acceleration attenuation ratio can reach up to 83.49%, the energy attenuation is up to 98.44%, and the noise reduction is up to 10.38dB. This can be achieved through reasonable damping structure design and non-Newtonian fluid proportioning.

导出引用

宋元锦1,2，庄重2，程帜军2，蒋卫斌2，王先平2，方前锋2. 新型非牛顿流体减振器对滚筒洗衣机减振降噪效果的研究[J]. 振动与冲击, 2024, 43(15): 311-322

SONG Yuanjin1,2, ZHUANG Zhong2, CHENG Zhijun2, JIANG Weibin2, WANG Xianping2, FANG Qianfeng2. Vibration and noise reduction effect of new type non-Newtonian fluid damper on drum washing machine[J]. Journal of Vibration and Shock, 2024, 43(15): 311-322

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