摘要
为优化高速泵冷却循环回路和提高可靠性,设计了一种采用动压流体润滑轴承的无油高速离心泵,通过工质流体润滑轴承和冷却电机,将增压流道与冷却循环流道结合,结构更加紧凑。为分析高速离心泵的内部流动特性,采用CFD方法对该泵在设计转速下不同流量时泵内部的流动情况进行了数值模拟,并在搭建的测试台上对模型泵的水力性能进行了实验研究。研究表明:高速离心泵设计工况下内部流道中相对速度和总压的分布均匀;模拟计算的泵扬程和效率与实验值接近,模拟值具有较高精度;工况条件对泵的水力性能有较大影响,应避免过小流量运行。
An oil-free high-speed centrifugal pump that used dynamic fluid lubrication bearings was designed for the optimization of cooling loop and improvement of reliability,in which working fluid lubricated bearings and cooled motor.The high-speed pump was more compact because of the combination of pressure boosting field and cooling circulation.In order to study the internal flow of high-speed pump,the flow characteristics of the pump under different flow rates at design speed were simulated and studied by CFD method.The hydraulic performance of the model pump was experimentally studied on the built test bench.The research shows that the distributions of relative velocity and total pressure in the internal flow passage of high-speed centrifugal pump under design conditions are uniform.The pump head and efficiency calculated by the simulated flow field are close to the experimental values,thus the simulation prediction has high accuracy.The working conditions have a great impact on the hydraulic performance of the pump and the pump needs to avoid running at low flow rates.
作者
陈信
赖天伟
房煦峰
侯予
CHEN Xin;LAI Tian-wei;FANG Xu-feng;HOU Yu(State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi’an,China,Post Code:710049)
出处
《热能动力工程》
CAS
CSCD
北大核心
2020年第1期56-61,共6页
Journal of Engineering for Thermal Energy and Power
基金
中科院低温工程学重点实验室开放课题(CRYO20186)
陕西省重点研发计划(2018ZDXM-GY-057)。
关键词
高速泵
离心泵
流场模拟
实验研究
high-speed pump
centrifugal pump
flow field simulation
experimental research
