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以氮气式水击泄压阀阀内流道流场为研究对象,运用浸入实体法模拟氮气式水击泄压阀启闭过程,建立流体域及浸入实体域三维几何模型,结合阀芯运动轨迹,建立阀芯动力学方程,针对阀芯锥面不等面积的特殊设计,分析了泄压阀在水击脉动压力作用下启闭过程中阀芯各个端面上的受力状态,同时对比分析了泄压阀在不同入口恒压和水击脉动压力作用下阀芯各个端面受力及泄放量大小的影响规律。结果表明,阀芯在启闭过程中是一个震荡过程,存在一定的不平衡受力,阀芯各端面受力不均匀,且都发生方向相反、不同幅度的震荡,阀芯圆柱面受力可忽略。
Taking the flow field in the valve of nitrogen-type water hammer relief valve as the research object, the three-dimensional geometric model of the fluid field and the immersion solid body was established by using the immersion solid method to simulate the opening and closing process of the nitrogen- , The dynamic equation of the valve core is established. According to the special design of the unequal area of the valve cone, the stress state of the valve core on the opening and closing of the valve is analyzed under the action of water hammer pulsating pressure. At the same time, Pressure relief valve at different inlet constant pressure and water hammer pulsating pressure on each end of the spool force and the impact of the size of the law. The results show that during the process of opening and closing, the valve core is an oscillating process, and there is a certain unbalanced force. The force exerted on each end of the valve core is uneven, and the opposite directions occur. ignore.