摘要
针对某钢铁公司坯连铸机结晶器调宽液压系统中比例减压阀因最小软夹紧力不足导致的使用寿命短的问题,通过分析比例减压阀的结构及减压原理,对其性能进行优化研究。研究表明,在压差作用下,阀芯、阀套间的缝隙和同心状态会影响比例减压阀的缝隙流量,而阀芯结构参数是决定比例减压阀最小减压压力的关键因素。据此提出通过研磨对应台阶以增大阀芯与阀套间隙的改进方案,并搭建液压阀检测试验台,对比例减压阀压力-信号特性曲线进行检测。试验结果表明:研磨后,比例减压阀的最小减压压力降至0.4 MPa,且压力滞环仍符合样本要求;比例减压阀上机使用满足实际工况需求,使用寿命提升至原来的3倍以上,在降低维护成本的同时,有效提高了生产效率。该研究为板坯连铸机结晶器设备的稳定运行提供了理论依据,具有显著的工程应用价值。
To address the issue of short service life of proportional pressure reducing valves in the crystallizer wide side adjustment hydraulic system of a slab continuous casting machine at a steel company,caused by insufficient minimum soft clamping force,an optimization study on the valve performance was conducted by analyzing its structure and pressure reducing principle.The research shows that under pressure difference,the gap and concentricity between the valve spool and sleeve affect the gap flow,and the structural parameters of the spool are the key factors determining the minimum pressure reducing capability of the proportional valve.Accordingly,an improvement solution was proposed by grinding the corresponding step to increase the gap between the spool and sleeve.A hydraulic valve testing bench was built to examine the pressure signal characteristic curve of the proportional pressure reducing valve.Test results indicate that after grinding,the minimum pressure reducing pressure of the proportional valve decreases to 0.4 MPa,while the pressure hysteresis still meets the sample requirements.The proportional pressure reducing valve satisfies actual working conditions when installed,and its service life is extended to more than three times the original.This not only reduces maintenance costs,but also effectively improves production efficiency.The study provides a theoretical basis for the stable operation of crystallizer wide side adjustment equipment in slab continuous casters and demonstrates significant engineering application value.
作者
牛红杰
郑文明
闫凡熙
刘顺东
NIU Hongjie;ZHENG Wenming;YAN Fanxi;LIU Shundong(Science and Technology Department,North China Institute of Aerospace Engineering,Langfang Hebei 065000,China;Shougang Jingtang United Iron&Steel Co.,Ltd.,Tangshan Hebei 063200,China)
出处
《机床与液压》
北大核心
2026年第5期198-202,共5页
Machine Tool & Hydraulics
基金
廊坊市科学技术研究与发展计划自筹经费项目(2021011072
2025011039)。
关键词
结晶器调宽
比例减压阀
性能优化
缝隙流动
液压系统
crystallizer wide side adjustment
proportional pressure reducing valve
performance optimization
gap flow
hydraulic system
