基礎(chǔ)振動下電磁換向閥壓力流量特性研究
發(fā)布時間：2018-08-06 20:58
【摘要】：針對基礎(chǔ)振動對電磁換向閥壓力-流量特性的影響,采用控制閥口壓差模擬壓力損失的方法,同時考慮基礎(chǔ)振動引起的閥芯瞬態(tài)液動力和電磁力的變化,建立了基礎(chǔ)振動下的電磁換向閥的數(shù)學(xué)模型和仿真模型,實驗驗證了模型的準(zhǔn)確性,分析了基礎(chǔ)振動參數(shù)和結(jié)構(gòu)參數(shù)對閥的壓力-流量特性和流量波動的影響。研究表明:小流量、低壓降電磁換向閥對基礎(chǔ)振動的順應(yīng)性較好;基礎(chǔ)振動下存在壓力-流量特性降低區(qū)域和流量波動失效區(qū)域,壓差為0.7 MPa時的壓力-流量特性降低區(qū)域是0.4MPa時的45倍;彈簧剛度小于5kN/m時,減小閥芯質(zhì)量、增大阻尼系數(shù)有利于降低流量波動幅值。該研究對基礎(chǔ)振動下電磁換向閥的選型和設(shè)計提供了一定的理論參考。
[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.
【作者單位】： 中南大學(xué)機(jī)電工程學(xué)院;中南大學(xué)高性能復(fù)雜制造國家重點實驗室;
【基金】：國家重點基礎(chǔ)研究發(fā)展計劃資助項目(2013CB035400)
【分類號】：U455.31
本文編號：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.
【作者單位】： 中南大學(xué)機(jī)電工程學(xué)院;中南大學(xué)高性能復(fù)雜制造國家重點實驗室;
【基金】：國家重點基礎(chǔ)研究發(fā)展計劃資助項目(2013CB035400)
【分類號】：U455.31
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1 李霄涵;基于HDM-4的智能高速公路速度流量特性與用戶成本分析[D];北京交通大學(xué);2016年
，本文編號：2168970
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