离心泵平衡腔泄漏量和压力的计算与试验研究  

Calculation and experimental study of leakage and pressure in balance cavity of centrifugal pump

作　　者：曾继来[1] 刘在伦[1,2] 邵安灿 权辉 ZENG Jilai;LIU Zailun;SHAO Ancan;QUAN Hui(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Engineering Institute of Wenzhou Pump and Valve,Lanzhou University of Technology,Wenzhou 325102,Zhejiang China;Preeminence Pump Co.Ltd.,Songxi353500,Fujian China)

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325102 [3]普仑斯泵业有限公司,福建松溪353500

出　　处：《华中科技大学学报（自然科学版）》2023年第4期69-74,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51969014);甘肃省自然科学基金资助项目(20JR5RA456)。

摘　　要：基于后密封环和平衡孔泄漏量相等原理,推导出了平衡腔泄漏量和压力的数学模型.对不同后密封环间隙和平衡孔直径时的后密封环进口压力、平衡腔压力、平衡腔泄漏量进行了系统测试,结果发现:增大后密封环间隙对后泵腔有降压作用,而对平衡腔有增压作用;增大平衡孔直径,后泵腔压力和平衡腔压力有不同程度的降低,但当密封环间隙较小时后泵腔压降效果不明显.计算得到了后密封环流量系数和平衡孔流量系数与比面积的试验曲线,后密封环流量系数随比面积增大而增大,而平衡孔流量系数随比面积增大而减小.给出了流量系数比与比面积的试验曲线,该曲线反映了后密封环间隙和平衡孔直径对平衡腔压力的耦合调节作用,具有重要工程应用价值.Based on the equal leakage of the rear seal ring and the balance hole,mathematical models of the balance cavity leakage and pressure were derived.The inlet pressure of rear seal ring,the balance cavity pressure and leakage of balance cavity were systematically tested when the radial clearance of rear seal ring and the diameter of balance hole are different.The results show that the increase of the rear seal ring clearance has a depressurization effect on the rear pump cavity and a pressurization effect on the balance cavity.When the diameter of the balance hole is increased,the pressure of the rear pump cavity and the pressure of the balance cavity are decreased to different degrees.However,when the clearance of the seal ring is small,the pressure reduction effect of the pump cavity is not obvious.The test curves of the flow coefficient of the rear seal ring and the flow coefficient of the balance hole and the specific area were calculated.The flow coefficient of the rear seal ring increases with the increase of the specific area,while the flow coefficient of the balance hole decreases with the increase of the specific area.The test curve of flow coefficient ratio and specific area was given,which reflects the coupling regulating effect of the gap of the rear seal ring and the diameter of the balance hole on the pressure of the balance cavity,and has important engineering application value.

关 键 词：离心泵 轴向力 泄漏量 后密封环 平衡孔 流量系数 

分 类 号：TH311[机械工程—机械制造及自动化]