Abstract: In order to decrease the vibration noise radiated by a pipe mold centrifuge, a 3-D model of the pipe mold centrifuge was established, and its vibratory mode and inherent characteristics were analyzed. The vibration and noise of the centrifuge was measured under three conditions, that is, without pipe mold, with empty pipe mold and with filled pipe mold respectively. According to the test results, it is found that the primary factor which affects the vibration and noise of the machine is the interaction between the riding wheels and the pipe mold, so it is necessary to change their contact form in order to decrease the shock and vibration. Through analyzing the mechanism of damping layer to reduce noise and vibration, a new damping treating technique for reducing noise and vibration was presented, which was putting damping material layer on the surfaces of the riding wheels and changing the rigid contact to the elastic contact between the wheels. The contrast test of the centrifuge with damping riding wheels and the original riding wheels were conducted. The results indicate that the vibratory energy of centrifuge with damping riding wheels decreases by more than 60%, and the noise decreases by more than 10 dB(A), which has a striking effect in reducing the vibration and noise.

Key words: electromechanical engineering, centrifuge, vibration noise, damping riding wheel

摘要： 为了降低管模离心机的振动噪声，建立了离心机管模的三维模型并进行模态分析，研究了管模的固有特性。经过对无管模、空管模和实管模的振动噪声的试验分析，得知托轮和管模的相互作用对振动噪声的影响很大，需要改变它们的接触形式以减小冲击振动。通过对阻尼层减振降噪机理进行研究，提出在托轮表面增加阻尼材料层、变刚性接触为弹性接触的减振降噪方法。对采用阻尼托轮与原托轮的离心机进行了对比试验，结果表明，阻尼托轮使离心机的振动能量减少60%以上，噪声降低10 dB(A)以上，减振降噪效果非常显著。

关键词: 机电工程, 离心机, 振动噪声, 阻尼托轮