基于PCM数字阀和针形阀的流量调节装置设计  

Research of Flow Regulating Device Based on PCM Digital Valve and Needle Valve

作　　者：康洪铭[1] 霍国 成垒 陈辅政[1] 唐领 KANG Hong-ming;HUO Guo;CHENG Lei;CHEN Fu-zheng;TANG Ling(China Aerodynamics Research and Development Center, Mianyang, Sichuan 621000)

机构地区：[1]中国空气动力研究与发展中心,四川绵阳621000

出　　处：《液压与气动》2022年第4期139-146,共8页Chinese Hydraulics & Pneumatics

摘　　要：随着风洞高压供气试验对流量调节的指标不断提高,模拟调节阀已无法完全满足试验需求,同时针对目前数字阀存在的不足,设计了一种基于PCM数字阀和针形阀相结合的流量调节装置。该装置先通过PCM数字阀提供基准流量,针形阀再进行微调,从而实现流量调节。介绍了PCM数字阀喷嘴结构的设计、喉道面积的分配和电磁阀的参数计算,以及针形阀流量特性的分析、阀体结构和电动作动筒的设计,提出了流量控制流程和基于非线性自整定的PID调节控制策略。结果表明:该装置的流量调节范围达到了0.1~8.1 kg/s,绝对控制精度优于±3 g/s,相对控制精度优于±0.04%FS,同时具有调节时间短、超调量小、鲁棒性好等特点,可为风洞高压供气试验提供有力支撑。With the high pressure air supply experiments in wind tunnel improve continuously,the required indicators of flow regulation increase gradually.Both the analog control valve and the digital valve can't meet the demands,then a flow regulating device based on PCM digital valve and needle valve is designed to achieve the goal.The PCM digital valve provide reference flow,and the needle valve continue to adjust residual flow.The introduction of PCM digital valve includes nozzle structure design,throat area distribution,and magnetic valve calculation.The presentation of needle valve contains the flow characteristics analysis,and the valve structure design.Based on the nonlinear self-tuning PID,The flow control process and adjusting strategy is put forward.The results show that the flow regulation range of flow regulating device is reached 0.1~8.1 kg/s,the absolute control accuracy is superior±3 g/s,the relative control accuracy is superior±0.04%FS,at the same time,the device has the characteristics of short adjustment time,small overshoot and good robustness,which provides strong support for high pressure gas supply experiments.

关 键 词：供气试验 数字阀 针形阀 流量调节 

分 类 号：TH137[机械工程—机械制造及自动化] TH138