全径球阀与缩径球阀在不同开度下的流通性能  

Flow Performance of Full Bore Ball Valves and Reduced Bore Ball Valves at Different Opening Degrees

作　　者：李波 黄永红 王瑞 张善义 LI Bo;HUANG Yonghong;WANG Rui;ZHANG Shanyi

机构地区：[1]济南迈克阀门科技有限公司,山东济南250400

出　　处：《煤气与热力》2024年第6期V0012-V0015,共4页Gas & Heat

摘　　要：试验测试全径球阀与缩径球阀在不同开度下的流阻系数,全径球阀与缩径球阀的开度小于等于20°时,流阻系数随着开度增大急剧下降,当开度在20°~50°的范围内,流阻系数变化趋势随开度增大逐步转变为平缓,当开度大于50°时,流阻系数变化趋势趋于稳定。模拟仿真了全径球阀与缩径球阀在不同开度下的压力变化、流速变化。全径球阀开度为50°时,阀球处出现回旋现象,开度为60°时,回旋现象消失;缩径球阀开度为60°时,阀球处存在回旋现象,开度大于等于70°时,回旋现象逐步消失。缩径球阀开度为80°时,仍存在高速区域,直到缩径球阀完全打开,高速区域仍未完全消失。模拟仿真了全径球阀与缩径球阀在不同开度下的流阻系数变化。开度小于40°时,全径球阀和缩径球阀流阻系数变化均较为剧烈,开度大于等于40°时,流阻系数变化趋于平缓。试验结果和模拟仿真结果表明,相同的开度下,全径球阀流阻系数比缩径球阀低,全径球阀在流通性能上具有一定优势。The flow resistance coefficients of full bore ball valve and reduced bore ball valve at different opening degrees are experimentally tested.When the opening degrees of full bore ball valve and reduced bore ball valve are less than or equal to 20°,the flow resistance coefficients decrease sharply with the increase of the opening.When the opening degrees are within the range of 20°to 50°,the change trends of the flow resistance coefficients gradually become gentle with the increase of the opening.When the opening degrees are greater than 50°,the change trends of the flow resistance coefficients become stable.The pressure change and flow rate change of full bore ball valve and reduced bore ball valve at different opening degrees are simulated.When the opening degree of full bore ball valve is 50°,the vortex phenomenon appears at the valve ball 60°.When the opening degree of reduced bore ball valve is 60°,there is a vortex phenomenon at the valve ball,and the vortex phenomenon gradually disappears when the opening degree is greater than or equal to 70°.When the opening degree of reduced bore ball valve is 80°,there is still a high-speed area,and the high-speed area does not completely disappear until the reduced bore ball valve is fully opened.The changes of flow resistance coefficients of full bore ball valve and reduced bore ball valve at different opening degrees are simulated.When the opening degrees are less than 40°,the changes in flow resistance coefficients of full bore ball valve and reduced bore ball valve are more severe.When the opening degrees are greater than or equal to 40°,the changes in flow resistance coefficient tend to be gradual.The test results and simulation results show that the flow resistance coefficient of full bore ball valve is lower than that of reduced bore ball valve at the same opening degree,and the full bore ball valve has certain advantages in flow performance.

关 键 词：全径球阀 缩径球阀 流阻系数 

分 类 号：TU995.3[建筑科学—供热、供燃气、通风及空调工程]