基础振动下插装式单向阀的动态响应特性研究

Study on dynamic response characteristics of cartridge check valve under foundation vibration

为明确强振动环境对某特种车辆插装式单向阀工作性能的影响,建立了插装式单向阀在基础振动作用下的数学模型和AMESim仿真模型,分析了当基础振动最大加速度为4g时,不同振动参数及阀结构参数下单向阀的动态响应特性,并通过实验验证了模型的有效性.结果表明:当正向通流,基础振动频率大于43 Hz时,单向阀全工况的流量波动幅值占比小于10%,不会发生流量波动失效,时均流量相对无振动时的相对偏差小于25%;当流量小时,弹簧刚度越大、阀芯质量越小,流量波动越小;当流量大时,弹簧腔阻尼孔直径越大,流量波动越小;当反向截止时,基础振动会使阀口打开,最小反向泄漏流量达到3.3 mL/min,截止功能失效.振动环境下,可通过适当增大弹簧刚度、减小阀芯质量和增大弹簧腔阻尼孔直径来减小插装式单向阀的流量波动.

To clarify the effect of strong vibration environment on the working performance of cartridge check valve for a special vehicle,the mathematical model,and AMESim simulation model of the cartridge check valve under foundation vibration were established.The dynamic response characteristics of the check valve with different vibration parameters and valve structure parameters were analysed when the maximum acceleration of foundation vibration was 4g.The validity of the model was verified by experiment.Results show that when forward flow is passed and the base vibration frequency is greater than 43 Hz,the amplitude of flow fluctuation of the check valve is less than 10% of the full working condition,and there is no failure of flow fluctuation,and the relative deviation of the time-averaged flow rate relative to no vibration is less than 25%.When the flow rate is small,the larger the spring stiffness,the smaller the mass of the spool,and the smaller the flow rate fluctuation.When the flow rate is large,the larger the diameter of the spring cavity damping orifice,the smaller the flow rate fluctuation.While the check valve is reverse cutoff,foundation vibration can make the valve orifice open,and the minimum reverse leakage flow is 3.3 mL/min,and the cutoff function is disabled.Under vibration environment,the flow rate fluctuation of cartridge check valve can be reduced by appropriately increasing the spring stiffness,reducing the mass of the spool and increasing the diameter of the spring cavity damping orifice.