轮胎动平衡机双平面偏心动态补偿系统设计

Design of Double-plane Eccentricity Dynamic Compensation System for a Tire Dynamic Balancing Machine

针对轮胎动平衡机的偏心补偿问题,提出一种具有自动调节功能的双平面偏心动态补偿装置.通过电磁摩擦的方式改变平衡盘与主轴的啮合状态,使平衡盘与主轴差速运动,实现对4个平衡盘角度位置的调整,改变平衡盘的合成不平衡量,实现了系统不平衡量的补偿.在动平衡试验机上安装该装置,并进行了砝码验证对比试验.试验结果表明:该装置通过降低系统自身的不平衡量,获得了更好的振动信号,减少了同频干扰,降低了对系统零部件的磨损,提高了系统的测试精度、稳定性和重复性.

The unbalance of tire dynamic balancing machine itself is an important factor affecting the test accuracy. The unbalance of the system itself was usually subtracted in the subsequent calculation without changing the mechanical structure in the current study of eccentricity compensation; therefore,the dynamic balancing machine still worked in the eccentric state. According to the problem of eccentricity compensation for the tire dynamic balancing machine,a double-plane eccentricity compensation device with automatic adjusting function was proposed. By adjusting four balance discs with the electromagnetic friction method to change the synthetic unbalance of the balance discs,the compensation was realized.The device was installed in the tire dynamic balance testing machine and a weight verification contrast experiment was carried out. The experimental results show that by reducing the unbalance of the system itself,the better vibration signal is obtained,which reduces the interference of the same frequency,decreases the wear of the system components, and improves the testing precision, stability and repeatability of the system.