基础振动下电磁换向阀压力流量特性研究
发布时间：2018-08-06 20:58
【摘要】：针对基础振动对电磁换向阀压力-流量特性的影响,采用控制阀口压差模拟压力损失的方法,同时考虑基础振动引起的阀芯瞬态液动力和电磁力的变化,建立了基础振动下的电磁换向阀的数学模型和仿真模型,实验验证了模型的准确性,分析了基础振动参数和结构参数对阀的压力-流量特性和流量波动的影响。研究表明:小流量、低压降电磁换向阀对基础振动的顺应性较好;基础振动下存在压力-流量特性降低区域和流量波动失效区域,压差为0.7 MPa时的压力-流量特性降低区域是0.4MPa时的45倍;弹簧刚度小于5kN/m时,减小阀芯质量、增大阻尼系数有利于降低流量波动幅值。该研究对基础振动下电磁换向阀的选型和设计提供了一定的理论参考。
[Abstract]:In view of the effect of foundation vibration on the pressure-flow characteristics of electromagnetic directional valve, the method of simulating pressure loss by controlling the pressure difference of valve mouth is adopted, and the changes of transient hydraulic force and electromagnetic force of valve core caused by foundation vibration are considered at the same time. The mathematical model and simulation model of electromagnetic directional valve under foundation vibration are established, and the accuracy of the model is verified by experiments. The effects of foundation vibration parameters and structural parameters on the pressure-flow characteristics and flow fluctuation of the valve are analyzed. The results show that the low pressure drop electromagnetic directional valve has better compliance with the foundation vibration with small flow rate, and the pressure flow characteristic reduction region and the flow fluctuation failure area exist under the foundation vibration. When the pressure difference is 0.7 MPa, the reduction area of pressure-flow characteristic is 45 times of that of 0.4MPa, and when the spring stiffness is less than 5kN/m, the mass of valve core is reduced and the amplitude of flow fluctuation is reduced by increasing damping coefficient. The research provides a theoretical reference for the selection and design of electromagnetic directional valve under foundation vibration.
【作者单位】： 中南大学机电工程学院;中南大学高性能复杂制造国家重点实验室;
【基金】：国家重点基础研究发展计划资助项目(2013CB035400)
【分类号】：U455.31
本文编号：2168970
[Abstract]:In view of the effect of foundation vibration on the pressure-flow characteristics of electromagnetic directional valve, the method of simulating pressure loss by controlling the pressure difference of valve mouth is adopted, and the changes of transient hydraulic force and electromagnetic force of valve core caused by foundation vibration are considered at the same time. The mathematical model and simulation model of electromagnetic directional valve under foundation vibration are established, and the accuracy of the model is verified by experiments. The effects of foundation vibration parameters and structural parameters on the pressure-flow characteristics and flow fluctuation of the valve are analyzed. The results show that the low pressure drop electromagnetic directional valve has better compliance with the foundation vibration with small flow rate, and the pressure flow characteristic reduction region and the flow fluctuation failure area exist under the foundation vibration. When the pressure difference is 0.7 MPa, the reduction area of pressure-flow characteristic is 45 times of that of 0.4MPa, and when the spring stiffness is less than 5kN/m, the mass of valve core is reduced and the amplitude of flow fluctuation is reduced by increasing damping coefficient. The research provides a theoretical reference for the selection and design of electromagnetic directional valve under foundation vibration.
【作者单位】： 中南大学机电工程学院;中南大学高性能复杂制造国家重点实验室;
【基金】：国家重点基础研究发展计划资助项目(2013CB035400)
【分类号】：U455.31
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，本文编号：2168970
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