圆筒状褶式机油滤清器的模拟与优化设计

Simulation and optimization design on cylindrical pleated lube oil filter

为降低机油滤清器过滤压力损失,通过压力损失试验,确定了压力损失模拟的边界条件,建立了压力损失的二维CFD模拟模型,分析了压力损失特性与影响因素,推导了压力损失与影响因素的多元回归关系式。模拟结果表明:对滤芯压降影响的主次顺序为过滤速度、滤芯折高、流道宽度、折数、滤纸厚度与含尘浓度;滤芯初始压力损失与其结构及运行参数呈非线性关系,并与滤芯褶数存在最佳值;回归关系式的相关系数为0.998,因此,可靠性高。

In order to reduce the pressure drop of lube oil filter, the boundary simulation conditions of the pressure drop were confirmed by pressure drop test, and a 2D CFD （computational fluid dynamics） simulation model was put forward. The properties of the pressure drop and its influence factors were analyzed, and a multianalysis regress relationship was proposed. Simulation result shows that the influence factors are filtrating speed, fold height, routeway width, fold number, filter paper thickness and impurity concentration, whose influence degrees are from big to small. The relationships between the initial pressure drop and the influence factors but the thickness are nonlinear, besides, there is an optimal fold number. The correlative coefficient of the regress relationship is 0. 998, so the relationship is credible. 1 tab, 12 figs, 11 refs.