基于阀芯位移软测量的数字阀智能驱动方法研究  

Intelligent Driving Method of Digital Valve Based on Soft Measurement of Valve Core Displacement

作　　者：姚静[1,2] 杨帅[1] 殷航 王运昌 王文静 丘铭军[3] YAO Jing;YANG Shuai;YIN Hang;WANG Yunchang;WANG Wenjing;QIU Mingjun(School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004;Hebei Provincial Key Laboratory of Heavy Fluid Power Transmission and Control,Yanshan University,Qinhuangdao 066004;National Key Laboratory of Metal Forming Technology and Heavy Equipment,China Heavy Machinery Research Institute Corporation,Xi'an 710032)

机构地区：[1]燕山大学机械工程学院,秦皇岛066004 [2]燕山大学河北省重型机械流体动力传输与控制实验室,秦皇岛066004 [3]中国重型机械研究院股份公司金属成形技术与重型装备全国重点实验室,西安710032

出　　处：《机械工程学报》2024年第4期155-166,共12页Journal of Mechanical Engineering

基　　金：国家重点研发计划(2022YFC2805703);国家自然科学基金面上(51975507);河北省自然科学基金联合基金(E2021203250)资助项目。

摘　　要：针对数字阀在目前驱动方法控制下存在动态响应慢、静态线性可控区间小、电能损耗较高等问题,提出一种基于阀芯位移软测量的数字阀智能驱动方法。建立数字阀机理模型,分析数字阀动态响应过程,得到驱动电压和阀入口压力是影响数字阀响应速度的关键参数;建立阀芯位移软测量模型,通过有限元仿真和试验修正温度对位移软测量模型的影响,精度达到92.04%;基于关键参数对数字阀动态响应的影响规律,提出一种智能驱动方法,阀芯位移软测量值作为多级工作阶段精准切换的条件,维持阶段驱动信号智能调节以适应压力的变化;搭建数字阀性能测试试验平台,验证智能驱动方法的有效性。结果表明,相较单电压驱动方法,智能驱动方法下阀芯启闭时间最高缩短43.9%,占空比-流量特性曲线线性区间最高提升20%,饱和区间均在10%以内,电能损耗降低66%。该智能驱动方法有效提高了数字阀的动静态特性,降低了线圈电能损耗。Under the current driving control method,the digital valve has the problems of slow dynamic response,small static linear controllable range,and high power.An intelligent driving method of the digital valve based on a soft measurement of the valve core displacement is proposed.The mechanism model of the digital valve is established,and the dynamic response process of the digital valve is analyzed.The driving voltage and valve inlet pressure are the key parameters affecting the response speed of the digital valve.The valve core displacement soft measurement model is established,and the influence of the correction temperature on the displacement soft measurement model is analyzed by finite element simulation and experimental analysis.The accuracy reaches 92.04%.Based on the influence of key parameters on the dynamic response of the digital valve,an intelligent drive method is proposed.The soft sensor value of the valve core displacement is used as the condition of accurate switching in the multi-stage drive stage.In the maintenance stage,the driving signal is adjusted intelligently to adapt to the change of pressure.The experimental platform of the digital valve performance test is built to verify the effectiveness of the intelligent drive method.The results show that compared with the single voltage drive method,the intelligent drive method can reduce the opening and closing response time by 43.9%.The linear range of the duty cycle-flow characteristic curve is increased by 20%,the saturation range is less than 10%,and the power loss is reduced by 66%.It effectively improves the dynamic and static characteristics of the digital valve,reduces the power loss of coil.

关 键 词：数字阀 位移软测量 动态响应 智能驱动方法 节能 

分 类 号：TH137[机械工程—机械制造及自动化]