双喷孔滑油喷嘴流动及流量特性的数值计算研究

In order to study the internal flow and volume flow rate characteristics of the oil jet nozzles with two orifices, according to the flow characteristics of oil jet nozzle, a numerical calculation model of the flow of the nozzle was established based on the VOF(volume of fluid) two-phase method. Based on the verification of the reliability of the numerical calculation method, the effects of orifice distance, diameter ratio and orifice distribution order on oil jet nozzle flow and volume flow rate characteristics were calculated and analyzed. The results show that the volume flow rate of each orifice in the two orifices structure is smaller than the oil volume flow rate of the single orifice. The difference between the volume flow rate of each orifice and the volume flow rate of single orifice at the same diameter ratio decreases with the increase of orifice distance, and the maximum deviation of the volume flow rate of orifice is 4.4% when the diameter ratio is 2.0 and the orifice distance is twice the base orifice diameter. The volume flow rate of the downstream orifice decreases with the increase of the diameter ratio. The larger diameter ratio and the smaller distance of two orifices, the greater influence of the upstream orifice on the downstream orifice, and the larger the difference of volume flow rate between the downstream orifice and single orifice is. When the orifice distance is twice the base orifice diameter and the diameter ratio increased from 1.0 to 2.0, the flow rate of the downstream orifice decreased by 2.8%. The oil volume flow rate of the same orifice diameter located upstream of the nozzle at the same orifice distance is greater than the volume flow rate when it is located downstream, but the total volume flow rate of oil jet nozzle is almost the same.