排油孔位置对流量报警阀阈值的影响分析OA

The structure of the spring chamber oil discharge hole has a significant impact on the performance of the mechanical flow alarm valve.Rational design can enhance stability,sensitivity,and reliability,ensuring the normal operation of hydraulic systems.In this thesis,a combined method of simulation and experimentation is used to compare the effects of two spring chamber oil discharge hole structures(the oil discharge hole is directly opposite the inlet and the oil discharge hole is directly connected to the outlet)on the alarm flow threshold of the flow alarm valve.Computational fluid dynamics analysis shows that the oil discharge hole being directly opposite the inlet(model 1)causes the liquid in the spring chamber to interact with the incoming flow,increasing the pressure on the valve core to the right,raising the alarm threshold,and resulting in significant pressure loss and energy consumption.In contrast,connecting the oil discharge hole directly to the outlet(model 2)reduces the pressure inside the spring chamber,allowing the alarm to be triggered at a lower inlet flow rate,thus achieving higher flow sensitivity.Experimental results also confirm that,under identical conditions,the alarm flow threshold of model 1(63.5 L/min)is much higher than that of model 2(15.7 L/min),verifying the simulation analysis results.