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排灌机械工程学报
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排灌机械工程学报  0, Vol. Issue (): 1-    DOI:
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基于动网格上游泵送机械密封的性能研究
陈汇龙 刘玉辉 刘彤 王强 李雯瑜
(江苏大学 能动学院,江苏 镇江,212013)
The upstream pumping mechanical seal performance study based on the dynamic mesh and cavitations model 
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摘要 为了准确获得上游泵送机械密封的液膜厚度,采用proe软件建立螺旋槽上游泵送机械密封的三维参数化模型,应用Fluent软件的动网格技术,同时考虑空化的影响,对机械密封微间隙内流场进行了数值模拟。将得到的液膜厚度与有关文献的测试结果进行对比分析。并在同时考虑空化模型和动网格技术的基础上,计算分析了工况参数对液膜刚度和泄漏量的影响。研究表明:应用动网格计算的液膜厚度与测试结果所获得的结果基本一致(最大相对误差为19.6%,最小相对误差为0,平均相对误差为8%),从而验证了动网格技术在机械密封内流场模拟中是可行的;机械密封内流场计算应当考虑空化问题,才能得到比较真实的流场特性;基于动网格和空化模型的内流场模拟计算能够较准确地预测液膜厚度;泄漏量和液膜刚度随着转速、介质压力的增加而增加,端面螺旋槽在产生泵送效应的同时也产生动压效应。
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陈汇龙 刘玉辉 刘彤 王强 李雯瑜
关键词上游泵送   液膜厚度   动网格   空化     
Abstract: In order to get the accurate liquid film thickness of the upstream pumping mechanical seal, the model of 3-D flow in upstream pumping mechanical seals with spiral grooves was made by Pro/E wildfire. To construct parametric micro-gap geometrical model of seal faces, using dynamic mesh technology, Fluent software was applied to simulate the flow field of spiral groove upstream pumping mechanical seal in consider of the cavitations. Liquid membrane thicknesses of different working conditions were obtained and compared with the experiments to verify the correctness of the simulation results. And the effect of working condition parameters on liquid membrane stiffness and the leakage were calculated and analyzed. Research shows that: Liquid membrane thicknesses obtained by simulation is basically in line with that of the experiments (the maximum relative error is 19.6%, the minimum relative error is 0, the average relative error is 8%), which verifies the dynamic mesh technique to the flow field simulation on the mechanical seal is feasible. the problem of cavitations should be considered in flow field calculation on the mechanical seal to obtain the true flow field characteristics the simulation based on dynamic mesh and cavitations model in the flow field can be used to predict liquid membrane thickness. Leakage and liquid film rigidity increase with the speed, medium pressure increases, and spiral groove end can produce pumping effect, meanwhile, the dynamic pressure effect are obtained.
Key wordsupstream pumnping   liquid membrane thickness   dynamic mesh   cavitation   
引用本文:   
陈汇龙 刘玉辉 刘彤 王强 李雯瑜. 基于动网格上游泵送机械密封的性能研究[J]. 排灌机械工程学报, 0, (): 1-.
CHEN Hui-Long- Liu-Yu-Hui- Liu-Tong- Wang-Qiang- Li-Wen-Yu. The upstream pumping mechanical seal performance study based on the dynamic mesh and cavitations model [J]. Journal of Drainage and Irrigation Machinery Engin, 0, (): 1-.
 
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