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江澳翔1(), 陈源1(), 李运堂1, 江锦波2, 彭旭东2, 章聪1, 王冰清1
收稿日期:
2024-05-08
修回日期:
2024-06-11
出版日期:
2024-06-26
通讯作者:
陈源
作者简介:
江澳翔(1999—),男,硕士研究生,744439232@qq.com
基金资助:
Aoxiang JIANG1(), Yuan CHEN1(), Yuntang LI1, Jinbo JIANG2, Xudong PENG2, Cong ZHANG1, Bingqing WANG1
Received:
2024-05-08
Revised:
2024-06-11
Online:
2024-06-26
Contact:
Yuan CHEN
摘要:
以超临界二氧化碳为润滑介质,考虑湍流、阻塞、惯性等高速流体效应建立箔片柱面气膜密封润滑理论模型,研究了不同高速流体效应组合下密封端面流场、箔片变形的变化规律,揭示了高速高压超临界二氧化碳箔片柱面气膜密封的运行机理,进一步分析了工况和结构参数对密封性能的影响规律,获得了结构参数的优选范围。结果表明:湍流效应对超临界二氧化碳箔片柱面气膜密封润滑界面流场和密封性能影响较大,阻塞效应和惯性效应影响相对较小;各流体效应之间存在交互作用,湍流效应会使阻塞出口边界压力减小,而惯性效应会使阻塞出口边界压力增大,且湍流效应条件下惯性效应对气膜浮升力的影响作用更为显著;当长径比取2.0~2.5,柔度系数取0.001~0.003,密封性能较优。
中图分类号:
江澳翔, 陈源, 李运堂, 江锦波, 彭旭东, 章聪, 王冰清. 微间隙高速流体效应对箔片柱面气膜密封性能影响研究[J]. 化工学报, DOI: 10.11949/0438-1157.20240505.
Aoxiang JIANG, Yuan CHEN, Yuntang LI, Jinbo JIANG, Xudong PENG, Cong ZHANG, Bingqing WANG. Study on the influence of micro-gap high-speed fluid effects on compliant foil cylindrical gas film seal performance[J]. CIESC Journal, DOI: 10.11949/0438-1157.20240505.
参数名称 | 数值 |
---|---|
环境压力pa / MPa | 0.1 |
进口压力pin /MPa | 8 |
出口压力pout / MPa | / |
转速n /(r/min) | 30000 |
介质温度T /K | 314 |
表1 工况参数
Table 1 Working condition parameters
参数名称 | 数值 |
---|---|
环境压力pa / MPa | 0.1 |
进口压力pin /MPa | 8 |
出口压力pout / MPa | / |
转速n /(r/min) | 30000 |
介质温度T /K | 314 |
变量名称 | 数值 |
---|---|
半径R /mm | 25.4 |
密封长度L /mm | 50.8 |
半径间隙C /μm | 10 |
偏心率e | 0.6 |
波箔片厚度tb /mm | 0.8 |
波箔片节距s / mm | 4.572 |
波箔片半弦长l / mm | 1.778 |
泊松比 | 0.3 |
弹性模量/ GPa | 214 |
表2 结构参数
Table 2 Structural parameters
变量名称 | 数值 |
---|---|
半径R /mm | 25.4 |
密封长度L /mm | 50.8 |
半径间隙C /μm | 10 |
偏心率e | 0.6 |
波箔片厚度tb /mm | 0.8 |
波箔片节距s / mm | 4.572 |
波箔片半弦长l / mm | 1.778 |
泊松比 | 0.3 |
弹性模量/ GPa | 214 |
高速流体效应 | Case Ⅰ | Case Ⅱ | Case Ⅲ | Case Ⅳ | Case Ⅴ | Case Ⅵ |
---|---|---|---|---|---|---|
湍流效应 | 忽略 | 考虑 | 忽略 | 考虑 | 忽略 | 考虑 |
阻塞效应 | 忽略 | 忽略 | 考虑 | 考虑 | 考虑 | 考虑 |
惯性效应 | 忽略 | 忽略 | 忽略 | 忽略 | 考虑 | 考虑 |
表3 高速流体效应组合模型
Table 3 High-speed fluid effects combination model
高速流体效应 | Case Ⅰ | Case Ⅱ | Case Ⅲ | Case Ⅳ | Case Ⅴ | Case Ⅵ |
---|---|---|---|---|---|---|
湍流效应 | 忽略 | 考虑 | 忽略 | 考虑 | 忽略 | 考虑 |
阻塞效应 | 忽略 | 忽略 | 考虑 | 考虑 | 考虑 | 考虑 |
惯性效应 | 忽略 | 忽略 | 忽略 | 忽略 | 考虑 | 考虑 |
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