【摘要】 为了改善广泛应用的三级同心溢流阀的噪声特性,按照实际阀的结构和参数,建立了锥形主阀内部流场的三维模型,应用计算流体动力学计算软件Fluent,对三级同心溢流阀模型的多种工况进行了仿真计算和可视化研究,给出了锥阀阀腔内的速度场、压力场分布图。在可视化分析的基础上对阀芯的结构做了改进,对比了3种结构不同阀的内部流场特性。结果表明,改进结构后流场中漩涡区的分布减小,最低压力得到提高,降低了气蚀和噪声发生的可能性。此研究工作为流道结构的优化设计提供了理论依据。更多还原

【Abstract】 To improve the noise characteristic of hydraulic relief valve widely used in practice,a 3-D model of initial flow field was established according to the practical structure and parameters of a main poppet valve.By using the computational fluid dynamics(CFD) software Fluent,numerical simulations and visual analysis of the hydraulic relief valve in different work conditions were carried out.The pressure and velocity distribution graphs in the valve were obtained.Based on the visual analysis,the structure and parameters of the valve were adjusted.Three different structure valves were compared and investigated.The results show that the eddy area is reduced and the lowest pressure increases through improving the original structure,so the possibility to cause cavitation and noise is reduced.The study provides a basis for the optimal design of the valve structure and parameter.更多还原