贯流风叶自动数控钻削去重动平衡系统研究与实现

Automatic Dynamic Balance Research and Realization of Cross-flow Fan by NC Drilling

针对贯流风叶手动粘贴平衡片精度低、效率低、易脱落等缺点,首次引入数控去重动平衡技术,自主研发贯流自动数控钻削去重动平衡系统。首先简述贯流风叶动平衡力学原理和二面平衡原理;其次对贯流风叶不平衡量钻削实现精确建模;同时,采用4个压电传感器作为硬支撑平衡机的不平衡量测量装置,输出第一和第二校正面X和Y方向的模拟量电压（0~10 V）,经过信号处理电路后,再由PCL-812PG多功能数据采集卡传送给单片机控制系统;再者,通过补偿系统、电压与不平衡量的比例系数,计算得到两个校正面的不平衡量;最后精确控制两个进给主轴钻削,实现贯流风叶自动数控钻削去重动平衡。实验结果表明：研究设计的贯流风叶自动数控钻削去重动平衡系统的不平衡量减少率达到90%。

Aiming at the disadvantage of low precision,low efficiency and easily pulled off of the cross-flow fan by manual dynamic balance,the NC drilling technology was firstly introduced into this field,and the automatic dynamic balance of cross-flow fan by NC drilling was developed by our independent research. First,the mechanisms of dynamic balance and two end-face equivalent balance were introduced. Then,the accurately modeling of cross-flow fan unbalance by NC drilling was proposed. In the same time,four piezoelectric sensors were used as the measuring equipment of fixed blade support balancing machine,and the analog voltage（ 0 ~ 10 V） of the double emendation plate＇s X and Y direction was output. After that,by signal processing,the analog voltage was transferred to the microcomputer control system by the PCL-812 PG data acquisition card. And then later,the unbalances of two emendation plate were calculated by the coefficient of analog voltage and unbalance. Finally,the automatic dynamic balance of cross-flow fan was came true by NC drilling. The experimental result shows that the maximumachievablereduction ratio of this dynamic balance system can reach up to 90%.