摘要
对于火电厂主蒸汽系统平行双闸板闸阀高温高压工况下密封性能恶化的这一技术难题,本文提出楔形补偿方案,采用15°楔形角动态补偿机构,由介质压力驱动自身完成热变形和密封应力的自适应匹配;零摩擦启闭结构、双向自增强密封面设计使应力波动减小了67%,5000次循环磨损量≤0.05 mm,泄漏率稳定在了0.007 mL/min之内,均优于工业标准ISO15848-1 Class VI标准值。工程使用表明,该技术可以将每年的维修费降低了82.8%,密封面粗糙度下降了50%,实现了无卡痕运转,为高参数机组阀门的设计提供了技术支持,极大提高了火电设备的长周期可靠运行。
For the technical challenge of deteriorating sealing performance of parallel double gate valves in the main steam system of thermal power plants under high temperature and high pressure conditions,this paper proposes a wedge compensation scheme,which adopts a 15°wedge angle dynamic compensation mechanism and is driven by the medium pressure to achieve adaptive matching of thermal deformation and sealing stress;The zero friction opening and closing structure,as well as the bi-directional self reinforcing sealing surface design,reduce stress fluctuations by 67%.The wear amount after 5000 cycles is≤0.05 mm,and the leakage rate remains stable within 0.007 mL/min,all of which are better than the industrial standard ISO15848-1 Class VI value.Engineering applications have shown that annual maintenance costs can be reduced by 82.8%,sealing surface roughness can be reduced by 50%,and seamless operation can be achieved.This technology provides technical support for the design of valves for high parameter units and can greatly improve the long-term operational reliability of thermal power equipment.
作者
赵安东
叶鹏豪
郑海云
刘军
罗丑根
沈伟光
ZHAO An-dong;YE Peng-hao;ZHENG Hai-yun;LIU Jun;LUO Chou-gen;SHEN Wei-guang(Shangzheng Valve Group Co.,Ltd.,Wenzhou 325105,Zhejiang,China;China Ulo Valve Co.,Ltd.,Wenzhou 325105,Zhejiang,China;Zhejiang Qilong Valve Co.,Ltd.,Wenzhou 325105,Zhejiang,China;DBV Valve Co.,Ltd.,Wenzhou 325102,Zhejiang,China;Zhejiang Xinou Automatic Instrument Co.,Ltd.,Wenzhou 325106,Zhejiang,China)
出处
《阀门》
2025年第11期1214-1219,共6页
Chinese Journal of Valve
关键词
双闸板闸阀
楔形补偿
热膨胀
零摩擦
双向自增强
double gate valve
wedge compensation
thermal expansion
zero friction
bidirectional self enhancement
