DFT型水轮机调速器机械液压随动系统技术研究  

Study on machinery liquid-pressure servo-system of type-DFT turbine governor

作　　者：吴运华[1] 

机构地区：[1]长江科学院控制设备研究所,湖北武汉430010

出　　处：《长江科学院院报》2002年第2期44-46,共3页Journal of Changjiang River Scientific Research Institute

基　　金：水利部水利开发基金资助项目 (SJ964 6)

摘　　要：传统的中小型机械液压水轮机调速器液压随动系统机械杆系多 ,油、管路复杂 ,成本及整机故障率高。针对这些不足 ,采用丝杆机构取代传统杆系 ,用控制滑阀取代主配压阀 ,减少传递环节 ,使系统结构更加简单合理。改进后系统转速死区ix≤ 0 .0 8% ,静态特性曲线线性度误差ε <5 % ;随动系统不准确度ia<1.5 % ;自动空载 3min转速摆动相对值Δx≤± 0 .2 5 % ,接力器不动时间Tq<0 .2s,甩 10 0 %负荷 ,过渡过程超过 3%额定转速的波峰N<2 ,调节时间T <4 0s,且系统操作简单 ,维护、保养方便 ,运行寿命延长 。The traditional middle small sized machinery liquid pressure servo system of turbine governor has some defects,such as:more machinery members,complex oil channels and pipelines,expensive cost and high failure rates. Aiming at these defects,the new system uses screw members in stead of the traditional member system and employs controlled sliding valve in stead of main pressure distribution valve,and, in result,the system structure is simplified and more reasonable.The data of main parameters are as follows:① rotational speed dead zone i x ≤ 0.08% ;② linear error of static characteristic curve ε <5%;③ degree of un accuracy of servo system i a< 1.5% ;④ no movement time of the servomotor T q< 0.2 s;⑤ relative speed oscillating value Δ x ≤ 0.25% under auto unload operation in 3 min ;⑥ in transition process of throwing off load 100%,wave number N <2,regulating time T <40 s;The improved system possesses the advantages of simple operation,convenient maintenance and service long operating life and high reliability.

关 键 词：水轮机 调速器 液压系统 

分 类 号：TK730.41[交通运输工程—轮机工程]