注排液式砂轮在线动平衡技术研究

发布时间：2018-11-23 07:23

【摘要】：为有效抑制磨削过程中由砂轮失衡引起的振动,提出了一种新的注排液式砂轮在线动平衡方法,并设计了平衡装置。通过控制注入平衡腔内的液体与计算排出平衡腔的液体,控制平衡腔内残余液体质量,进而利用残余液体提供合适的平衡校正量。分析平衡腔内液体的离心力与腔内液位半径的关系,建立动态注液模型。采用打靶法对排液用的短孔型节流阀进行参数标定,分析了影响节流阀参数的因素,建立了流量控制模型,实现了平衡腔中残余液体量的精确计算。动平衡实验结果表明,在砂轮转速为2 700r/min时进行校正,使用注排液式砂轮动平衡方法,振动幅值下降达89.25%,验证了提出的在线动平衡方法的可行性和平衡效果,同时也表明该平衡方法具有持续的平衡能力,解决了现有注液式在线动平衡腔满而丧失平衡能力的问题。
[Abstract]:In order to effectively suppress the vibration caused by grinding wheel unbalance, a new on-line dynamic balancing method is proposed and a balancing device is designed. The residual liquid mass in the equilibrium cavity is controlled by controlling the liquid injected into the equilibrium cavity and the liquid discharged from the equilibrium cavity, and the appropriate balance correction quantity is provided by using the residual liquid. The relationship between the centrifugal force and the liquid level radius in the equilibrium cavity was analyzed and the dynamic liquid injection model was established. The parameters of the short-hole throttle valve for liquid discharge were calibrated by shooting method. The factors affecting the parameters of the throttle valve were analyzed and the flow control model was established. The accurate calculation of the residual liquid volume in the balance chamber was realized. The results of dynamic balance experiment show that the vibration amplitude decreases by 89.25 when the rotational speed of grinding wheel is 2 700r/min. The feasibility and balance effect of the online dynamic balancing method are verified. At the same time, it is shown that the equilibrium method has the ability to balance continuously, which solves the problem that the existing liquid-injection on-line dynamic equilibrium cavity is full and the balance ability is lost.
【作者单位】：西安交通大学机械制造系统工程国家重点实验室;
【基金】：国家自然科学基金资助项目(51275379);国家自然科学基金创新研究群体资助项目(51421004)
【分类号】：TG743

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