一种新型大流量数字阀

发布时间：2019-02-26 11:24

【摘要】：大流量开关阀一般采用多级先导结构,体积、质量较大,且先导流量和零位泄漏较大,为此提出了基于二维螺旋伺服结构的一体化大流量开关阀.该大流量数字开关阀利用螺旋伺服结构通过液压力将阀芯的旋转运动转换为阀芯的轴向运动,实现二级液压功率放大,无需另外配置先导阀.在分析大流量数字开关阀工作原理的基础上,利用流体动力学理论建立其数学模型;在MATLAB平台上采用龙格库塔数值算法编制仿真程序,进行理论分析;最后建立实验平台对理论分析结果进行验证.理论和实验结果表明:新型大流量数字开关阀具有良好的流量特性和良好的动态特性,阀芯位移2.7mm的时间约17ms.工作压力为3MPa、阀芯位移为0.25mm时,流量达到123.3L/min;工作压力为7 MPa、阀芯位移为0.2mm时,流量达到106.9L/min.
[Abstract]:The large flow on-off valve generally adopts multi-stage pilot structure, large volume, large mass, and large pilot flow and zero leakage. Therefore, an integrated large-flow switch valve based on two-dimensional spiral servo structure is proposed. The high-flow digital on-off valve uses the screw servo structure to convert the rotating motion of the valve core into the axial motion of the valve core by hydraulic pressure to realize the two-stage hydraulic power amplification without the need to configure the pilot valve. On the basis of analyzing the working principle of large-flow digital on-off valve, the mathematical model is established by using the theory of fluid dynamics, and the simulation program is compiled with Runge-Kutta numerical algorithm on the platform of MATLAB, and the theoretical analysis is carried out. Finally, an experimental platform is established to verify the theoretical analysis results. The theoretical and experimental results show that the new type of digital on-off valve with large flow rate has good flow characteristics and good dynamic characteristics, and the time of valve core displacement 2.7mm is about 17 Ms. When the working pressure is 3 MPA and the valve core displacement is 0.25mm, the flow rate reaches 123.3 L / min, and when the working pressure is 7 MPa, the valve core displacement is 0.2mm, the flow rate reaches 106.9 L / min.
【作者单位】：浙江工业大学机械制造及自动化教育部重点实验室;
【基金】：浙江省自然科学基金资助项目(LY15E050018)
【分类号】：TH137.52

【相似文献】