气垫调压室与减压阀联合防护下的减压阀优化  

Optimization of pressure reducing valve under joint protection of pressure reducing valve and air cushioned surge chamber

作　　者：李海涛 孙丽君 

机构地区：[1]山东省胶东调水工程寿光管理站,山东寿光262700

出　　处：《人民长江》2016年第9期67-70,共4页Yangtze River

摘　　要：以刚性水锤的状态空间法和弹性水锤的特征线方法为理论基础,针对气垫调压室与减压阀联合防护下减压阀对气垫调压室和机组参数的影响问题开展数值模拟。以某运行中的水电站为例,对其输水系统中不同减压阀的参数实施相关优化,在对优化结果进行分析、研究的基础上,通过总结得出了减压阀阀径的选取原则,即阀径不宜过大,也不宜过小;最优减压阀直径应当能保证机组导叶在关闭时产生的蜗壳末端最大压力近似地等于减压阀在关阀时所产生的阀前最大压力。运行实践表明,机组关阀的时间应当能在降低压力的同时又能够保证关闭时间不能太长,以免造成水资源的浪费。On the basis of the state space method of rigid water hammer and Methodot characteristics（ MOC） of elastic water hammer,the impact of pressure reducing valve under joint protection of pressure reducing valve and air cushioned surge chamber on the air cushioned surge chamber and parameters of units is simulated. Taking a hydropower station in operation as an example,the parameters of different pressure reducing valve of the water transfer system are optimized and the principle for selecting the diameter of the pressure reducing valve is summarized,which can not be too large or too small,on the basis of the analysis and study of the optimization results. The optimal diameter should guarantee that the maximum pressure at the end of the volute casing when the stators are closing should be equal to the maximum upstream pressure generated when the pressure reducing valve is closing. The practice showed that the closing time of the valves can not be too long and should reduce the pressure as well,so as to avoid the waste of water resources.

关 键 词：减压阀直径 关闭时间 调压室涌浪 蜗壳末端压力 

分 类 号：TV732.56[水利工程—水利水电工程]