Electro-hydraulic control valves are key hydraulic components for industrial applications and aerospace,which controls electro-hydraulic motion.With the development of automation,digital technology,and communication t...Electro-hydraulic control valves are key hydraulic components for industrial applications and aerospace,which controls electro-hydraulic motion.With the development of automation,digital technology,and communication technology,electro-hydraulic control valves are becoming more digital,integrated,and intelligent in order to meet the requirements of Industry 4.0.This paper reviews the state of the art development for electro-hydraulic control valves and their related technologies.This review paper considers three aspects of state acquisition through sensors or indirect acquisition technologies,control strategies along with digital controllers and novel valves,and online maintenance through data interaction and fault diagnosis.The main features and development trends of electro-hydraulic control valves oriented to Industry 4.0 are discussed.展开更多
Valve management is one of the major functions of DEH for steam turbine. It has an important practical significance for the security and economy of the steam turbine. This paper starts from the valve configuration fig...Valve management is one of the major functions of DEH for steam turbine. It has an important practical significance for the security and economy of the steam turbine. This paper starts from the valve configuration figure of the domestic-type 300 MW steam turbine, and then makes a simple comparison between the two types of valve governing modes. In order to realize the valve control, the structure of control system has been established, in which the roles of the mathematical functions are discussed. On the basis of the experiment of valve flow characteristic, this article carries out a quantitative study on the functions of the valve management and the parameter tuning method. Through a serious corrections, the sequence valve flow characteristic curve is obtained, which can provide significant guidance on the research of valve management of the similar steam turbines.展开更多
随着工业化日渐发展,汽轮发电机在越来越多的领域得到了有效应用,并发挥了重要作用。随着市场上对汽轮发电机的依赖性增大,传统的控制技术已无法满足现有设备的需求。为提高汽轮发电机运行的可靠性,汽轮机数字电液控制系统(Digital Elec...随着工业化日渐发展,汽轮发电机在越来越多的领域得到了有效应用,并发挥了重要作用。随着市场上对汽轮发电机的依赖性增大,传统的控制技术已无法满足现有设备的需求。为提高汽轮发电机运行的可靠性,汽轮机数字电液控制系统(Digital Electric Hydraulic control system,DEH)电调自动控制技术应运而生。基于此,详细分析在汽轮发电机中的DEH电调自动控制技术,突破传统的技术限制,为汽轮发电机提供现代化控制技术的理论基础。展开更多
基金Supported by NSFC-Zhejiang Joint Fund(Grant No.U1509204)National Natural Science Foundation of China(Grant Nos.51835009,51922093).
文摘Electro-hydraulic control valves are key hydraulic components for industrial applications and aerospace,which controls electro-hydraulic motion.With the development of automation,digital technology,and communication technology,electro-hydraulic control valves are becoming more digital,integrated,and intelligent in order to meet the requirements of Industry 4.0.This paper reviews the state of the art development for electro-hydraulic control valves and their related technologies.This review paper considers three aspects of state acquisition through sensors or indirect acquisition technologies,control strategies along with digital controllers and novel valves,and online maintenance through data interaction and fault diagnosis.The main features and development trends of electro-hydraulic control valves oriented to Industry 4.0 are discussed.
文摘Valve management is one of the major functions of DEH for steam turbine. It has an important practical significance for the security and economy of the steam turbine. This paper starts from the valve configuration figure of the domestic-type 300 MW steam turbine, and then makes a simple comparison between the two types of valve governing modes. In order to realize the valve control, the structure of control system has been established, in which the roles of the mathematical functions are discussed. On the basis of the experiment of valve flow characteristic, this article carries out a quantitative study on the functions of the valve management and the parameter tuning method. Through a serious corrections, the sequence valve flow characteristic curve is obtained, which can provide significant guidance on the research of valve management of the similar steam turbines.
文摘随着工业化日渐发展,汽轮发电机在越来越多的领域得到了有效应用,并发挥了重要作用。随着市场上对汽轮发电机的依赖性增大,传统的控制技术已无法满足现有设备的需求。为提高汽轮发电机运行的可靠性,汽轮机数字电液控制系统(Digital Electric Hydraulic control system,DEH)电调自动控制技术应运而生。基于此,详细分析在汽轮发电机中的DEH电调自动控制技术,突破传统的技术限制,为汽轮发电机提供现代化控制技术的理论基础。
