关键词: 机电工程, 离心机, 振动噪声, 阻尼托轮

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