无胶须轮胎模具弹簧气孔套进气段结构对喷射流动参数的影响

基于计算流体动力学（CFD）技术，利用大型流体工程计算软件CFX15.0，模拟研究无胶须轮胎模具弹簧气孔套进气段结构对喷射流动参数的影响。结果表明：在相同弹簧行程下，随着阀杆锥角增大，流阻系数先减小后逐渐增大，而在相同阀杆锥角下，流阻系数则随弹簧行程增大而总体减小；阀杆锥角和弹簧行程对流量系数和出口端流量的影响则相反。本研究获得最佳喷射流动参数的条件为：弹簧行程小于（大于）0.2 mm时，阀杆锥角取65.4°（69.4°）。;Based on computational fluid dynamics technology，the effect of the inlet section structure of spring vent sleeve for burr-free tire mould on the injection flow parameters was simulated by using large fluid engineering calculation software CFX15.0. The results showed that，at same spring stroke，the flow resistance coefficient decreased first and then increased gradually with the increasing of the valve stem cone angle，while the flow resistance coefficient decreased with the increasing of spring stroke at same valve stem cone angle. However, the effect of valve stem cone angle and spring stroke on the flow coefficient or outlet flow was opposite. The condition to obtain the best jet flow parameters for the study was that the valve stem cone angle was 65.4°（69.4°） when the spring stroke was less（greater）than 0.2 mm