深孔钻削双锥面负压排屑系统数值模拟与试验研究

Numerical Simulation and Experimental Study on Deep Well Drilling Double Cone Negative Pressure Scraps Discharge System

以深孔加工单锥面负压排屑系统为设计依据,根据流体力学理论设计双锥面深孔负压排屑系统,并建立流体力学模型与数学模型。利用计算流体力学(FLUENT)技术,对一系列不同负压结构进行了数值模拟。模拟过程入口与出口均采用压力边界条件。分析排屑通道压力与速度变化曲线,得出排屑通道内流体的压力与速度变化规律。通过与实验结果进行对照发现,射流喷嘴大小以及角度是影响深孔排屑的重要因素,而且与单锥面负压排屑系统相比,双锥面负压抽屑效能明显增强。

The single cone negative pressure clearance system of deep hole processing wa considered as design basis. According to the theory of fluid mechanics design of double cone hole negative pressure drainage system,the fluid model and mathematical model was established.By using the computational fluid dynamics technology,a series of different negative structures was done with numerical simulation.Simulation of the entrance and exit was used under pressure boundary condition.Analyzing the chip channel pressure and velocity change curve, drawing the variation law of cuningfluid pressure and speed within the channel. The result was found by contrasting the experiment, that the important influential factors of deep-hole chip are nozzle cone angle and size.Compared with the single cone negative pressure drainage ,the drainage effi- ciency of double cone negative pressure increases apparently.