自适应大流量安全阀的流固耦合分析与保压实验

Fluid-Structure Coupling Analysis and Pressure Holding Test of Adaptive Large Flow Safety Valve

为提高自适应大流量安全阀关键零件的可靠性及寿命,利用UG软件建立自适应大流量安全阀关键零件的三维模型,并借助ANSYS Fluent软件对其进行了网格划分,通过单向流固耦合分析得到了一级锥阀、二级差动阀芯等关键零件的应力、应变云图;为进一步研究自适应大流量安全阀的低压密封性,利用ZF-2WG液压支架阀综合实验台对其进行了6、14 MPa 2种不同压力的打压实验。仿真及实验结果表明:一级锥阀的锥面附近区域为应力集中区域,锥尖附近区域为应变集中区域;二级阀芯4个阻尼孔靠差动腔侧的出口处为应力集中区域,二级阀芯外环形差动腔接触流体区域为应变集中区域;通过操作控制P口压力为6、14 MPa,保压时间为120 s,压力值基本保持在设定值,保压效果非常理想。

In order to improve the reliability and life of adaptive large flow safety valve key parts,UG software was used to establish the 3D model of the adaptive large flow safety valve key parts,and with the help of ANSYS Fluent software,through unidirectional fluid-structure coupling analysis,the stress and strain cloud diagrams of the key parts such as first stage cone valve and second stage differential valve core were obtained.In order to further study the low pressure sealing performance of the adaptive large flow safety valve,the pressure test of ZF-2WG hydraulic support valve was carried out at 6 MPa and 14 MPa.The simulation and experimental results show that the stress concentration region is near the cone surface of the first stage cone valve,and the strain concentration region is near the cone tip.The outlet of the four damping holes on the side of the differential cavity of the secondary valve core is the stress concentration area,and the fluid contact area of the external annular differential cavity of the secondary spool is the strain concentration area.When the P port pressure is 6 MPa and 14 MPa,the pressure holding time is 120 s,the pressure value is basically maintained at the set value,the pressure holding effect is very ideal.