刮板输送机链轮磨损与圆环链形变之间的关系

摘要/Abstract

摘要：

采用数值分析与试验结合的方法分析了圆环链形变与驱动链轮磨损之间的关系。建立了圆环链有限元模型，分析了标准圆环链在不同负载下圆弧段的弹性形变，数值计算结果表明：在拉伸负载作用下，圆环链圆弧段为椭圆，椭圆长短轴之差随负载增加而增大,当负载接近弹性极限载荷时，圆环链椭圆弧段出现凹弧；采用柔性三坐标仪检测磨损前后驱动链轮链窝曲面并进行分析后发现,链轮链窝在准线方向磨损趋于均匀，母线方向磨损与圆环链形变之间存在关联。测试链轮母线磨损与匹配圆环链21.4%弹性极限载荷时外廓一致。最后得出了圆环链拉伸方向为短轴的椭圆环链或将有利于缓减链轮链窝曲面磨损的结论。

关键词: 圆环链, 弹性形变, 驱动链轮, 磨损

Abstract:

To calculate the deformation of the arc segment for round link chains, a finite element model was established, the elastic deformation of arc segment in different load was analyzed. The numerical calculation results show that, the arc segment of round link chain was deformed as ellipsis shape under the tensile load, and the difference between longer axis and shorter axis is bigger with higher load. When the tensile load is close to the elastic maximum, concave arc appeares in the middle of the ellipsis. Scanning the sprocket surface with flexible 3D coordinatograph and analysing the detected dots, results show that sprocket surface wear on the direction of directrix is even, and wear on the direction of generatrix has a relationship with the deformation of round link chain. The wear curve of the detected sprocket on the direction of generatrix is close to the deformation of the outer-side for round link chain with 21.4% elastic maximum load. So elliptical chain, shorter axis of which is aligned with the tensile force, may be a better chain to lower the wear of sprocket surface.

Key words: round link chain, elastic deformation, driving sprocket, wear

中图分类号:

TH277

王淑平, 杨兆建, 王学文. 刮板输送机链轮磨损与圆环链形变之间的关系[J]. 中国机械工程, 2014, 25(12): 1586-1590.

Wang Shuping, Yang Zhaojian, Wang Xuewen. Relationship between Round Link Chain Deformation and Worn Sprocket[J]. China Mechanical Engineering, 2014, 25(12): 1586-1590.

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