微量润滑切削多组分在线混合器结构设计及仿真

Structure Design and Simulation Analysis of Multi-component Inline Mixer for Mixing Cutting Fluid in Minimal Quantity Lubrication

为促进不同切削液在线混合,设计了混合器结构,进行了切削液雾滴分布均匀性数值仿真试验,并开展试验验证。结果表明:具有分流器结构,且进液口位于混合管中心部位的混合器均匀性指数γ_(a)值和变异系数CV值分别为0.8734和0.3638,均高于其他混合器;进行实际喷雾试验,基于水敏纸上雾滴分布,所得γ_(a)和CV值分别为0.8928和0.2844,近似于数值仿真结果。试验证明了基于数值仿真进行均匀性分析的可行性,验证了具有分流器结构,且进液口位于混合管中心部位的混合器性能优良,可以用于生产中切削液的在线混合式微量润滑。

The cutting fluid of multi-component sprayed with inline mixing can effectively improve the lubrication and cooling efficacy of the machining zone.Therefore,a kind of mixer with differing structure parameters for inline mixing cutting fluids is proposed and designed.The inline mixing performance of the mixer with a multi-injection structure and the liquid inlet at the middle of the mixing tube is simulated and tested.Results show that the uniformity index(γ_(a))and the coefficient of variation(CV)value obtained by numerical simulation are 0.8734 and 0.3638,respectively,which are higher than those of other mixers.Based on the actual distribution of droplets on the water-sensitive paper,the γ_(a) and CV values are 0.8928 and 0.2844,respectively,which are similar to the results obtained by numerical simulations.The tests proves the feasibility of uniformity analysis based on numerical simulation,and further shows that the proposed mixer has excellent performance and can be used in inline mixing cutting fluids under actual minimal quantity lubrication conditions.