叶轮平衡孔直径对离心泵水力性能的影响  

Influence of impeller balancing hole diameter on hydraulic performance of centrifugal pump

作　　者：刘在伦[1,2] 石福翔 王仁忠 张森[1] 孙雨[1] 

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]兰州理工大学温州泵阀工程研究院,浙江温州325105 [3]松溪县中等职业技术学校,福建松溪353500

出　　处：《兰州理工大学学报》2016年第6期57-61,共5页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51269010);浙江省自然科学基金(LY12E09002)

摘　　要：开平衡孔双密封环叶轮具有能平衡大部分轴向力的特性,至今仍广泛应用于离心泵中.在降速后的IS80-50-315型离心泵上,用平衡孔直径为0、6、8、10mm的同一个叶轮,对泵的性能、前后泵腔和平衡腔的液体压力进行了系统测试.试验结果表明,加大叶轮平衡孔直径,会使泵的扬程降低,输入功率增大,效率降低;前后泵腔液体压力在相同半径处随着叶轮平衡孔直径的增大而减少,且后泵腔液体压力平均值较前泵腔液体压力高;在后密封环径向间隙不变时,随着叶轮平衡孔直径的增大,平衡腔液体压力无因次曲线变得平坦,从控制平衡腔液体压力及轴向力角度,后密封环径向间隙断面面积与叶轮平衡孔总面积存在最佳比值.Centrifugal pump impeller with balance holes and double sealing rings has properties of balan- cing most of axial force, and this kind of structure is still widely used in centrifugal pump. In this article, the centrifugal pump IS80-50-315 is taken as the research object, and an identical impeller with a series of impeller balancing hole diameters of 0,6,8, and 10 millimetres was used in test. During the test, the per- formance of the pump, fluid pressure in front pump chamber and back pump chamber, and the balance chamber fluid pressure were measured systematically. The result of this experiment showed that with the increase of the impeller balancing hole diameter, the pump head and efficiency would reduce and the input power would increase. The analysis of test data showed that on the same radial position, the fluid pressure in front pump chamber and back pump chamber would decrease. With the increase of the impeller balan- cing hole diameter. With the increase of the impeller balancing hole diameter, the dimensionless fluid pres- sure curves of the pump balance chamber would be flattened out. With the view of controlling balance chamber pressure and axial force, the area ratio of rear seal-ring clearance to all balance holes has an opti- mum value.

关 键 词：离心泵 叶轮平衡孔 性能 泵腔压力 平衡腔压力 

分 类 号：TH311[机械工程—机械制造及自动化]