刘在伦,孙雨,王东伟,侯祎华,马希金.离心泵泵腔流道液体泄漏量试验与计算方法[J].农业机械学报,2015,46(6):97-101.
Liu Zailun,Sun Yu,Wang Dongwei,Hou Yihua,Ma Xijin.Experiment and Calculation Method of Fluid Leakage in Flow Passage of Pump Chamber on Centrifugal Pump[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(6):97-101.
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离心泵泵腔流道液体泄漏量试验与计算方法   [下载全文]
Experiment and Calculation Method of Fluid Leakage in Flow Passage of Pump Chamber on Centrifugal Pump   [Download Pdf][in English]
投稿时间:2014-07-24  
DOI:10.6041/j.issn.1000-1298.2015.06.015
中文关键词:  离心泵  泵腔流道  隙径比  泄漏量  速度系数
基金项目:国家自然科学基金资助项目(51269010)和浙江省自然科学基金资助项目(LY12E09002)
作者单位
刘在伦 兰州理工大学 
孙雨 兰州理工大学 
王东伟 兰州理工大学 
侯祎华 兰州理工大学 
马希金 兰州理工大学 
中文摘要:设计了针对泵腔流道液体泄漏量测量的专用试验装置,采用改变叶轮轴向位置(即改变泵腔轴向间隙)来改变隙径比的方法,在间隙为0.2mm、0.3mm,长度为15mm密封环条件下,对隙径比为0.127、0.101、0.076、0.051、0.025、0.006的泵腔流道的进出口液体压力和液体泄漏量进行了测试及分析,并提出了泵腔流道液体泄漏量计算公式及其速度系数的确定方法。结果表明:不同隙径比的泵腔流道液体泄漏量系数与压力系数的变化很有规律性,其关系曲线几乎是一些斜直线,但隙径比和密封环间隙对其有较大影响;在泵结构不变情况下,只减小泵腔轴向间隙就能有效地减少液体泄漏量,提高泵容积效率,泵腔轴向间隙最佳取值范围为1~5mm。
Liu Zailun  Sun Yu  Wang Dongwei  Hou Yihua  Ma Xijin
Lanzhou University of Technology,Lanzhou University of Technology,Lanzhou University of Technology,Lanzhou University of Technology and Lanzhou University of Technology
Key Words:Centrifugal pump  Flow passage of pump chamber  Gap-diameter ratio  Leakage  Velocity coefficient
Abstract:A special testing apparatus was designed for measure and calculation of fluid leakage in flow passage of pump chamber. Gap-diameter ratio was changed by changing axial position of the impeller, i.e., changing the axial clearance of the pump chamber, when gap of wear-ring was 0.2mm and 0.3mm,respectively, and length of wear ring was 15mm, the import and export liquid pressure and fluid leakage in flow passage of pump chamber (gap-diameter ratio was 0.127, 0.101, 0.076, 0.051, 0.025 and 0.006, respectively) were tested and analyzed. The curves of leakage coefficient and pressure coefficient were obtained under different gap diameter ratios conditions. In addition, the curves of velocity coefficient and gap diameter ratio with different pressure coefficients were provided by calculating the experimental data. Results showed that under different gap-diameter ratios, fluid leakage coefficient and pressure coefficient in flow passage of pump chamber varied regularly, their relation curves were almost oblique lines, but gap diameter ratio and gap of wear ring can significantly affect curves. When the structure of pump was constant, decrease of axial clearance of pump chamber can effectively reduce fluid leakage, thus the volume efficiency of pump can be increased, and the optimum value range of axial clearance of pump chamber was 1~5mm. Computational formula of fluid leakage in flow passage of pump chamber and determination method of velocity coefficient were presented. This study is of great significance to the volume efficiency of pump, wheel resistance loss, liquid pressure distribution in pump chamber and the calculation of axial thrust.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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