排灌机械工程学报
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排灌机械工程学报  2019, Vol. 37 Issue (5): 427-434    DOI: 10.3969/j.issn.1674-8530.18.0145
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一种钠冷快堆核主泵动静压导轴承间隙流体动力特性分析
张凌峰,孙见君*,马晨波,张玉言
南京林业大学机械电子工程学院, 江苏 南京, 210037
Analysis of hydrodynamic characteristics of guide hybrid-bearings for sodium-cooled fast reactor coolant pumps
ZHANG Lingfeng, SUN Jianjun*, MA Chengbo, ZHANG Yuyan
College of Mechanical and Electrical Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
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摘要 针对钠冷快堆核主泵在实际运行过程中存在轴颈磨损和泄露问题,提出了一种通过设置螺旋槽来改善轴承间隙流体动力特性的方法.基于CFD数值模拟,对比了轴瓦螺旋槽轴承和主轴螺旋槽轴承性能优劣,发现主轴螺旋槽轴承效果更好.据此,探讨了螺旋槽结构参数对轴承间隙流体动力特性的影响,提出了初步优化的轴承结构.结果表明:影响支反力和偏位角的主因素是螺旋槽螺旋角,随着螺旋角的增大支反力增大、偏位角减小;影响泄漏量的主因素是螺旋槽螺旋角和槽台宽比,随着螺旋角和槽台宽比的增大泄漏量增大;头数对轴承性能参数影响不具有统计学意义.当螺旋槽结构参数设计为头数12,螺旋角42°,槽台宽比2时,导轴承具有最优的综合性能.研究成果对轴承结构设计有一定的指导意义.
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张凌峰
孙见君*
马晨波
张玉言
关键词核主泵   螺旋槽   流体动力学   数值模拟   优化     
Abstract: Since the sodium-cooled fast reactor coolant pump is subject to problems associated with journal wear and leakage during its operation, a guide plain bearing with spiral grooves is proposed to improve hydrodynamic characteristics of the gap in the bearing. Based on numerical simulations of CFD, the advantages and disadvantages of the bearings with spiral grooves respectively in the bush and the spindle are compared in terms of their performance. It turns out that the bearing with spiral grooves in the spindle is more effective. Accordingly, the influence of spiral groove structural variables on fluid dynamic characteristics of the bearing gap is explored, and then a preliminary optimized bearing structure is put forward. The results show that the helix angle of spiral groove is a significant factor influencing the support force and deflection angle. Further, with increasing helix angle, the support force rises but the deflection angle decreases. The helix angle and the groove-to-dam width ratio are two factors significantly affecting the leakage. Specially, the leakage increases with increase of the helix angle and the ratio. The number of spiral grooves has no significant effect on the bearing performance. The bearing with 12 spiral grooves, 42? helix angle and 2.0 groove-to-dam width ratio has the best overall performance. These results have certain guiding significance for the hybrid-bearing structure design.
Key wordsreactor coolant pump   spiral groove   hydrodynamics   numerical simulation   optimization   
收稿日期: 2018-07-16;
引用本文:   
张凌峰,孙见君*,马晨波等. 一种钠冷快堆核主泵动静压导轴承间隙流体动力特性分析[J]. 排灌机械工程学报, 2019, 37(5): 427-434.
ZHANG Ling-Feng,SUN Jian-Jun-*,MA Chen-Bo et al. Analysis of hydrodynamic characteristics of guide hybrid-bearings for sodium-cooled fast reactor coolant pumps[J]. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(5): 427-434.
 
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