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针对齿轮传动的振动噪声问题,搭建齿轮转动轴系实验台,并将一种剪切式磁流变阻尼器引入齿轮平行轴系,研究磁流变阻尼器对齿轮传动轴系振动的控制规律。采用加速度传感器,从齿轮箱体振动的角度研究磁流变阻尼器对齿轮传动轴系振动的影响,发现磁流变阻尼器可以抑制有效箱体振动,且降幅随阻尼器工作电流增加而升高,竖直方向降幅可达30%,水平方向降幅可达40%;通过分析其时、频域波形可以发现,磁流变阻尼器可以降低0~4 000 Hz各频率成分振动,尤其是降低1 000Hz以下振动成分幅值60%左右,降低3 000Hz左右振动成分幅值80%左右。应用磁流变阻尼器可以通过监测齿轮箱体振动情况,适时改变阻尼器电流来适应齿轮箱不同工况,保证箱体及传动轴振动保持在较低水平。
Aiming at the problem of vibration and noise of gear transmission, a test bench of gear rotating shaft system was set up and a shear-type magnetorheological damper was introduced into gear parallel shaft system to study the control law of magnetorheological damper on the vibration of gear shaft. The influence of magnetorheological damper on the vibration of gear shaft system is studied by using accelerometer and vibration of gearbox. It is found that the magnetorheological damper can restrain the vibration of effective box body, and the amplitude decreases with the increase of the working current of the damper , Down 30% in the vertical direction and up to 40% in the horizontal direction. By analyzing the time and frequency waveforms, it can be found that the MR damper can reduce the vibration of each frequency component from 0 to 4 000 Hz, 000Hz below the vibration amplitude of about 60%, reducing about 3 000Hz about 80% amplitude vibration components. Magnetorheological damper can be used to monitor the vibration of the gearbox body, timely change the damper current to adapt to different conditions of the gearboxes, to ensure that the vibration of the box body and the transmission shaft is kept at a low level.