基于压差-位移校正的两级插装式比例调速阀特性研究

传统调速阀是在节流阀基础上串联定差减压阀或是并联溢流阀构成,其存在节流损失大、流量控制精度易受负载干扰、结构尺寸大等不足。针对以上问题,提出一种基于压差-位移校正的两级插装式比例调速阀,通过传感器反馈的主级压差计算出主阀芯位移,并与反馈位移做闭环PI控制以达到控制流量的目的。通过分析插装阀工作原理及数学模型建立流量控制器,在Simulation X中建立该阀仿真模型。仿真结果验证了该阀的正确性与可行性,并表明该阀具有优越的静态控制精度和较好的静态负载特性,且其动态特性良好。

Study on the Characteristics of Two stage Flow Control Poppet Valve with Drop-Spool Opening Compensation

The traditional flow valve is almost consisted of the series differential pressure relief valve or parallel relief valve on the basis of the throttle. This structure would increase the system throttling loss, susceptible to load interference leads to low control accuracy and increase system complexity and other issues. To address the problem above, a two stage flow control poppet valve with drop spool opening compensation is presented. The main spool displacement was calculated by the main differential pressure of the sensor feedback, and with the feedback of the main spool displacement to do closed loop Proportion Integral (PI) control to achieve the purpose of controlling the flow. The flow controller was established by analyzing the working principle and mathematical model of the poppet valve, and the simulation model of the valve was established in simulation X. The simulation results verify the correctness and feasibility of the valve, and show that the valve has excellent static control accuracy and good static load characteristics, and its dynamic characteristics are good.