压水室隔舌安放角对离心泵无过载性能的影响  

Effect of the setting angle of a volute tongue on non-overloading performance of centrifugal pumps

作　　者：牟介刚[1,2] 刘菲[1,2] 谷云庆[1,2] 郑水华[1,2] 施瀚昱 王荣[1,2] 汪洋[1,2] 王成刚 

机构地区：[1]浙江工业大学机械工程学院,浙江杭州310014 [2]浙江工业大学过程装备及其再制造教育部工程研究中心,浙江杭州310014 [3]约瑟夫·傅里叶大学格勒诺布尔国立综合理工学院,格勒诺布尔38031

出　　处：《哈尔滨工程大学学报》2015年第8期1092-1097,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51305399);浙江省自然科学基金资助项目(LQ15E050005)

摘　　要：为了实现离心泵的无过载性能、保证泵运行的可靠性,以IH-100-65-200型化工离心泵为研究对象,采用RNG k-ε模型对不同隔舌安放角的离心泵进行数值模拟,分析不同隔舌安放角下离心泵轴功率、扬程、效率及内部流场的变化规律,研究隔舌安放角对离心泵无过载性能的影响,并对数值模拟结果进行试验验证。研究结果表明:压水室隔舌安放角是离心泵无过载性能的一个重要参数,随着隔舌安放角的减小,离心泵的扬程和效率提高,扬程曲线变得平坦、易出现驼峰;喉部面积增加,使泵更容易获得饱和轴功率性能;流体在叶轮和蜗壳内的静压增加,速度梯度方向和流道方向较一致,减小了流体与蜗壳壁面的撞击损失。In order to achieve the non-overloading performance and ensure the reliability of the centrifugal pumps, taking the IH-100-65-200 chemical centrifugal pump as the research object, numerical simulations including variation laws of shaft power, head, efficiency and inner flow field of centrifugal pump, and the non-overloading performance of the pump under different volute tongue angles were conducted with the adoption of RNG k-ε model. The results of the numerical simulation were verified by the tests. The results indicate that the volute tongue angle of pumping chamber is an important parameter of the non-overloading centrifugal pumps. With the decrease of volute tongue angle, the head and efficiency of the pump show an uptrend; the head curves become flat and are prone to hump; pumps are more easy to achieve the saturated shaft power performance as the throat area enlarges; the fluid pressure in the impeller and volute increases and the velocity gradient is in consistent with the flow direction, which leads to the decrease of the impact loss of fluid and volute wall.

关 键 词：离心泵 隔舌安放角 无过载性能 数值模拟 轴功率 离心泵扬程 离心泵效率 

分 类 号：TH311[机械工程—机械制造及自动化]