| 基于摩擦因数的螺旋密封性能影响因素分析 |
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| 引用本文： | 黎义斌,李建忠,白小榜.基于摩擦因数的螺旋密封性能影响因素分析[J].排灌机械工程学报,2020,38(11):1131-1137. |
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| 作者姓名： | 黎义斌 李建忠 白小榜 |
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| 作者单位： | 兰州理工大学能源与动力工程学院,甘肃兰州730050;重庆水泵厂有限责任公司,重庆400033 |
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| 基金项目： | 重庆水泵厂有限责任公司委托合作项目 |
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| 摘 要： | 为了揭示工作参数对螺旋密封性能和内部流动的影响机理,获得螺旋密封工作参数的选取范围和相互关系,将摩擦因数作为螺旋密封性能的量纲一评价因子.首先,建立了包括离心泵和螺旋密封的耦合三维模型和块结构化网格模型,基于RANS雷诺时均方法和RNG k-ε模型,选择螺旋角、相对槽宽和相对槽深等工作参数,基于Fluent软件预测了轴向雷诺数和螺旋密封摩擦因数的特性曲线,并对螺旋密封内部流场分布特性进行数值分析.结果表明:不同螺旋密封模型的摩擦因数随着轴向雷诺数增大而减小,且减小幅度越来越小;在其他影响因素一致,而仅改变螺旋角、相对槽宽和相对槽深中的某一参数的情况下,当螺旋角α=21.05°或相对槽宽r=0.5时,摩擦因数达到最大值,密封性能最优;当相对槽深H=3时,密封性能最优.为螺旋密封的设计和选型提供理论依据.
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| 关 键 词： | 螺旋密封 螺旋角 轴向雷诺数 摩擦因数 数值模拟 |
| 收稿时间： | 2019-04-22 |
Friction factor-based analysis of influence factors of spiral-grooved seal on performance |
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| LI Yibin,LI Jianzhong,BAI Xiaobang.Friction factor-based analysis of influence factors of spiral-grooved seal on performance[J].Journal of Drainage and Irrigation Machinery Engineering,2020,38(11):1131-1137. |
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| Authors: | LI Yibin LI Jianzhong BAI Xiaobang |
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| Institution: | 1. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2. Chongqing Pump Industry Co. Ltd., Chongqing 400033, China |
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| Abstract: | In order to reveal the mechanism that working parameters influence the performance and internal flow of spiral-grooved seals and obtain selection ranges and interrelationships of the parameters, a friction factor was used as a dimensionless indictor for evaluating the performance of spiral-grooved seals. At first, a 3D model of a spiral-grooved seal and its structured-mesh block were built. Then, the spiral angle, relative groove width and relative groove depth were selected, and the characteristic curves of friction factor of spiral-grooved seals are predicted against axial Reynolds number by Fluent software based on the RANS equations. The internal flow field features were analyzed too. The results show that the friction factor decreases with increasing axial Reynolds number, and the decrement gets smaller and smaller. When the spiral angle is 21.05° or the width is 0.5, the friction factor reaches the maximum value and the sealing performance is the best. When the relative groove depth is 3, the sealing performance is the best. This study can provide a theoretical basis for the design of spiral-grooved seals. |
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| Keywords: | spiral-grooved seals spiral angle axial reynolds number friction factor numerical simulation |
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