气动切断阀门快速启闭特性研究
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摘要
介绍了气动阀门的快速开关对阀门和气动执行机构产生的影响。分析了阀门开关速度过快,冲击载荷将损坏阀杆和气动执行机构,及其在管道系统产生水锤效应和危害。论证了大口径阀门过短的开关时间要求,执行机构难予满足,其过短的时间要求不切实际。在满足使用要求的前提下,应合理规定气动阀门的开关时间,不仅选型更加经济,而且阀门和气动执行机构的使用故障率也会降低。
The influence of quick switch of pneumatic valve on valve and actuator is introduced.Extremely short switching time will have adverse effects on valves and pneumatic actuators.Fast valve switching speed may result in damage to valve stem and pneumatic actuator by impulsive load.Suddenly closing of valve can also bring about water hammer effect which causes serious harm to the entire pipeline system.If there is no actuator suitable for large-diameter valves with extremely short switching time,the time requirement is superficial and impractical.Under the premise of satisfying the requirements for use,appropriate reduction of the requirement on the switching time of pneumatic valves can not only offer more economical selections,but also lower the failure rate of valves and pneumatic actuators.
The influence of quick switch of pneumatic valve on valve and actuator is introduced.Extremely short switching time will have adverse effects on valves and pneumatic actuators.Fast valve switching speed may result in damage to valve stem and pneumatic actuator by impulsive load.Suddenly closing of valve can also bring about water hammer effect which causes serious harm to the entire pipeline system.If there is no actuator suitable for large-diameter valves with extremely short switching time,the time requirement is superficial and impractical.Under the premise of satisfying the requirements for use,appropriate reduction of the requirement on the switching time of pneumatic valves can not only offer more economical selections,but also lower the failure rate of valves and pneumatic actuators.
引文
[1]赵洪铺,刘际,刘永良,等.气动执行器气动控制时间影响因子的理论分析[J].液压与气动,2018,(3):94-95.
[2]陆培文.实用阀门设计手册第2版[M].北京:机械工业出版社.2007:1173-1174,1156.
[3]秦大同,谢里阳.现代机械设计手册第4卷[M].北京:化学工业出版社.2011:21-41.
[4]石朝锋,薛立鹏,张连万,等.气动阀门运动特性研究[J].导弹与航天运载技术,2018,359(1):44.
[5]GB/T 1220-2007,不锈钢棒[S].
[6]GB/T 699-2015,优质碳素结构钢[S].
[7]NB/T 47010-2017,承压设备用不锈钢和耐热钢锻件[S].
[8]GB/T 3077,合金结构钢[S].
[9]GB/T 1221-2007,耐热钢棒[S].
[10]陈特欢,任志刚.流体管道水锤抑制的时间尺度变换控制[J].控制理论与应用,2018,35(2):198.
[11]段博崧,张健,姜继海.阀口压差对液压气穴发光的影响[J].液压与气动,2019,(1):1-2.
[12]王照成,徐俊辉,彭杰.大型合成氨厂循环水系统水锤分析[J].天然气化工-C1化学与化工,2018,43(2):54-55.
[2]陆培文.实用阀门设计手册第2版[M].北京:机械工业出版社.2007:1173-1174,1156.
[3]秦大同,谢里阳.现代机械设计手册第4卷[M].北京:化学工业出版社.2011:21-41.
[4]石朝锋,薛立鹏,张连万,等.气动阀门运动特性研究[J].导弹与航天运载技术,2018,359(1):44.
[5]GB/T 1220-2007,不锈钢棒[S].
[6]GB/T 699-2015,优质碳素结构钢[S].
[7]NB/T 47010-2017,承压设备用不锈钢和耐热钢锻件[S].
[8]GB/T 3077,合金结构钢[S].
[9]GB/T 1221-2007,耐热钢棒[S].
[10]陈特欢,任志刚.流体管道水锤抑制的时间尺度变换控制[J].控制理论与应用,2018,35(2):198.
[11]段博崧,张健,姜继海.阀口压差对液压气穴发光的影响[J].液压与气动,2019,(1):1-2.
[12]王照成,徐俊辉,彭杰.大型合成氨厂循环水系统水锤分析[J].天然气化工-C1化学与化工,2018,43(2):54-55.