磨粒叶序化排布砂轮表面磨削液流场分析

Flow Field Analysis of Grinding Fluid on Surface of Grinding Wheel with Phyllotactic Grain Pattern

为均化砂轮表面磨削液分布状态并获得最大的有效流量,根据叶序理论设计仿生结构的磨粒族砂轮。通过建立磨削区流场的运动方程和边界条件,利用流体力学软件(Fluent)仿真分析磨粒族叶序排布砂轮表面的磨削液流动状态,并与交错排布、矩阵排布及无序排布砂轮进行比较。结果表明:叶序排布砂轮磨削时磨削液在磨削区沿着叶列线沟槽均匀流动,有利于磨削热的传导和磨屑的及时排出;在相同的条件下,叶序排布磨粒族砂轮的磨削液有效流量更多,说明叶序排布砂轮较其他排布砂轮具有更好的冷却、润滑作用。

In order to uniform the grinding fluid on the surface of grinding wheel and obtain maximum useful flow rate,the bionic structure grinding wheel with abrasive cluster was designed according to phyllotactic theory. By establishing the fluid field movement equations and boundary conditions of the flow field in the grinding zone and using computational fluid dynamics software( Fluent),the flow state of the grinding fluid on the surface of grinding wheel with phyllotactic grain pattern were simulated,and the result was compared with that of the grinding wheel with abrasive cluster of random,array and staggered configuration. The results show that when grinding by the grinding wheel with phyllotactic grain pattern,the grinding fluid flows along spiral grooves of phyllotactic pattern,which makes fluid flow divergence around,and is advantaged to the grinding heat conduction and abrasive chip removal in time. At the same grinding condition,the grinding wheel with phyllotactic grain pattern posses the most useful flow rate,which shows it has better cooling and lubrication function than other grinding wheels.