化工学报Issue(11)：4536-4542,7.DOI:10.3969/j.issn.0438-1157.2014.11.046
中低压干气密封螺旋槽结构参数优化
Structural parameter optimization of spiral groove dry gas seal under low or medium pressure
摘要
Abstract
Based on full factorial design, optimization of structural parameters of a spiral groove dry gas seal (S-DGS) under low or medium pressure was performed. Based on the theory of gas lubrication, the sealing characteristic parameters, such as increase ratio of hydrodynamic open force, film stiffness and film stiffness to leakage ratio of an S-DGS under low or medium pressure were analyzed, and the preferred value ranges of structural parameters of spiral grooves were obtained. The concept of characteristic parameter optimization zone of an S-DGS was presented. The optimum sealing performance with different compressibility numbers of an S-DGS could be properly reflected by characteristic parameter optimization zone. When an S-DGS was operated under low or medium pressure and at high-speed, excellent sealing performance could be obtained for an S-DGS when spiral angle was between 10° and 25° and groove depth was between 5μm and 10μm. Excellent hydrodynamic effect and axis film stability could be obtained when groove-to-dam ratio was between 1.5 and 4.0 and groove length-width ratio was between 2 to 8. Excellent comprehensive sealing performance could be obtained when groove-to-dam ratio was between 0.7 and 1.5, groove length-width ratio was between 2 to 5.关键词
螺旋槽/性能优化带/干气密封/参数优化Key words
spiral groove/performance optimization zone/dry gas seal/parameter optimization分类
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彭旭东,江锦波,白少先,李纪云,王玉明..中低压干气密封螺旋槽结构参数优化[J].化工学报,2014,(11):4536-4542,7.基金项目
国家自然科学基金项目(51175740,51275473) （51175740,51275473）
高等学校博士学科点专项科研基金项目(20103317110002) （20103317110002）
国家重点基础研究发展计划项目（2014CB046404)。@@@@ supported by the National Natural Science Foundation of China (51175740,51275473),the Special Research Fund for the Doctoral Program of Higher Education of China (20103317110002) and the National Basic Research Program of China (2014CB046404) （51175740,51275473）
