间隙密封结构在高速重载轴承座上的应用研究
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摘要
运用流体力学计算分析传统间隙密封结构应用于高速重载轴承座的可行性。研究发现,当密封盘以工作转速2 000 r/min工作时,传统间隙密封能够实现完全密封所需的最大密封间隙宽度为0.556 mm,使用条件苛刻。对传统间隙密封结构进行了改进,增大了间隙密封结构的密封间隙,并在密封盘第一阶凸台上增设了数个气压孔。计算及分析结果表明,改进后的间隙密封结构在密封盘以工作转速2 000 r/min工作时,能够实现完全密封所需的最大密封间隙宽度可达1 mm以上,改善了间隙密封结构的使用条件。实验证明了改进的间隙密封结构能够实现高速重载轴承座的完全密封。
The feasibility of the gap sealing structure applied to the high speed and heavy duty bearing housing was investigated by hydrodynamics.It is found that when the seal disc worked at a working speed of 2 000 r/min,the maximum seal gap width required by the traditional gap seal for complete sealing is 0.556 mm,and the operating conditions are harsh.The traditional gap seal structure was improved by increasing the gap of the gap seal structure and adding several air pressure holes on the first stage of the disc.Through calculation and analysis,it is found that when the improved gap seal structure is operated under the working speed of 2 000 r/min,the maximum gap width required for complete sealing could be up to 1 mm,which improves the service conditions of the gap seal structure.The experimental results show that the improved gap seal structure can achieve complete sealing of high speed and heavy duty bearing housing.
The feasibility of the gap sealing structure applied to the high speed and heavy duty bearing housing was investigated by hydrodynamics.It is found that when the seal disc worked at a working speed of 2 000 r/min,the maximum seal gap width required by the traditional gap seal for complete sealing is 0.556 mm,and the operating conditions are harsh.The traditional gap seal structure was improved by increasing the gap of the gap seal structure and adding several air pressure holes on the first stage of the disc.Through calculation and analysis,it is found that when the improved gap seal structure is operated under the working speed of 2 000 r/min,the maximum gap width required for complete sealing could be up to 1 mm,which improves the service conditions of the gap seal structure.The experimental results show that the improved gap seal structure can achieve complete sealing of high speed and heavy duty bearing housing.
引文
[1]李伟,何毅斌,王彦伟,等.新型线香机设计及间隙密封流场仿真分析[J].机电工程,2016,33(6):713-717.LI W,HE Y B,WANG Y W,et al.Design of new incense machine and simulation analysis of clearance seal flow field[J].Mechanical & Electrical Engineering Magazine,2016,33(6):713-717.
[2]王成刚,何凡,刘慧,等.间隙宽度对冲击气缸间隙密封性能的影响[J].润滑与密封,2016,41(6):25-28.WANG C G,HE F,LIU H,et al.Effects of clearance width on clearance sealing performance of impact cylinder[J].Lubrication Engineering,2016,41(6):25-28.
[3]马慧明,张亚,李世中.弹底火药气体的间隙密封结构性能分析[J].振动与冲击,2017,36(12):140-145.MA H M,ZHANG Y,LI S Z.An analysis on the performance of a clearance seal structure applied to gunpowder gas of a projection base[J].Journal of Vibration and Shock,2017,36(12):140-145.
[4]DANISH S N,QURESHI S U R,IMRAN M M,et al.Effect of tip clearance and rotor-stator axial gap on the efficiency of a multistage compressor[J].Applied Thermal Engineering,2016,99(5):68-73.
[5]SURYANARAYANAN S,MORRISON G L.Analysis of flow parameters influencing carry-over coefficient of labyrinth seals[C]//Proceedings of ASME Turbo Expo 2009:Power for Land,Sea and Air.Orlan-do,Florida:ASME,2009.
[6]SHEN C,XIA X L,CAO Z W,et al.Analysis of flow and heat characteristics of seal structure with gap and cavity under the impact of high speed airflow[J].Acta Aeronautica et Astronautica Sinica,2012,33(1):34-43.
[7]YANG R,YANG J D,QI M X,et al.Numerical investigation of leakage and power loss for different seal types in turbine stage environment[C]//Proceedings of ASME Turbo Expo 2010:Power for Land,Sea and Air.Glasgow,UK:ASME,2010.
[8]程宁,李薇,洪国同.自由活塞斯特林发动机间隙密封泄漏特性分析[J].真空与低温,2012,18(2):94-100.CHENG N,LI W,HONG G T.Analysis on the gap seal leakage characteristics in free piston Stirling engines[J].Vacuum and Cryogenics,2012,18(2):94-100.
[9]周栋栋,陈奎生,湛从昌,等.间隙密封旋转接头流场特性仿真分析[J].机械设计与制造,2016(10):63-65.ZHOU D D,CHEN K S,ZHAN C C,et al.The flow field of clearance seal of rotary joint analysis[J].Mechanical Design and Manufacturing,2016(10):63-65.
[10]余常武,谢瑛,张俊,等.面向磨削主轴的间隙式密封性能分析[J].润滑与密封,2013,38(6):35-42.YU C W,XIE Y,ZHANG J,et al.Study on the clearance seal performance oriented to grinding spindle[J].Lubrication Engineering,2013,38(6):35-42.
[11]夏鹏,王祥和,刘占生,等.CFD优化火箭涡轮泵间隙密封静动态特性计算模型[J].推进技术,2017,38(7):1603-1609.XIA P,WANG X H,LIU Z S,et al.CFD optimized calculation of static and dynamic characteristics for annular seals in rocket turbo pumps[J].Journal of Propulsion Technology,2017,38(7):1603-1609.
[12]姜汝.间隙密封的性能研究[D].大庆:东北石油大学,2012.
[13]QI Y X,MENG X Q,MU D F,et al.Study on mechanism and factors affecting the gas leakage through clearance seal at nano-level by molecular dynamics method[J].Energy,2016,102(7):43-49.
[2]王成刚,何凡,刘慧,等.间隙宽度对冲击气缸间隙密封性能的影响[J].润滑与密封,2016,41(6):25-28.WANG C G,HE F,LIU H,et al.Effects of clearance width on clearance sealing performance of impact cylinder[J].Lubrication Engineering,2016,41(6):25-28.
[3]马慧明,张亚,李世中.弹底火药气体的间隙密封结构性能分析[J].振动与冲击,2017,36(12):140-145.MA H M,ZHANG Y,LI S Z.An analysis on the performance of a clearance seal structure applied to gunpowder gas of a projection base[J].Journal of Vibration and Shock,2017,36(12):140-145.
[4]DANISH S N,QURESHI S U R,IMRAN M M,et al.Effect of tip clearance and rotor-stator axial gap on the efficiency of a multistage compressor[J].Applied Thermal Engineering,2016,99(5):68-73.
[5]SURYANARAYANAN S,MORRISON G L.Analysis of flow parameters influencing carry-over coefficient of labyrinth seals[C]//Proceedings of ASME Turbo Expo 2009:Power for Land,Sea and Air.Orlan-do,Florida:ASME,2009.
[6]SHEN C,XIA X L,CAO Z W,et al.Analysis of flow and heat characteristics of seal structure with gap and cavity under the impact of high speed airflow[J].Acta Aeronautica et Astronautica Sinica,2012,33(1):34-43.
[7]YANG R,YANG J D,QI M X,et al.Numerical investigation of leakage and power loss for different seal types in turbine stage environment[C]//Proceedings of ASME Turbo Expo 2010:Power for Land,Sea and Air.Glasgow,UK:ASME,2010.
[8]程宁,李薇,洪国同.自由活塞斯特林发动机间隙密封泄漏特性分析[J].真空与低温,2012,18(2):94-100.CHENG N,LI W,HONG G T.Analysis on the gap seal leakage characteristics in free piston Stirling engines[J].Vacuum and Cryogenics,2012,18(2):94-100.
[9]周栋栋,陈奎生,湛从昌,等.间隙密封旋转接头流场特性仿真分析[J].机械设计与制造,2016(10):63-65.ZHOU D D,CHEN K S,ZHAN C C,et al.The flow field of clearance seal of rotary joint analysis[J].Mechanical Design and Manufacturing,2016(10):63-65.
[10]余常武,谢瑛,张俊,等.面向磨削主轴的间隙式密封性能分析[J].润滑与密封,2013,38(6):35-42.YU C W,XIE Y,ZHANG J,et al.Study on the clearance seal performance oriented to grinding spindle[J].Lubrication Engineering,2013,38(6):35-42.
[11]夏鹏,王祥和,刘占生,等.CFD优化火箭涡轮泵间隙密封静动态特性计算模型[J].推进技术,2017,38(7):1603-1609.XIA P,WANG X H,LIU Z S,et al.CFD optimized calculation of static and dynamic characteristics for annular seals in rocket turbo pumps[J].Journal of Propulsion Technology,2017,38(7):1603-1609.
[12]姜汝.间隙密封的性能研究[D].大庆:东北石油大学,2012.
[13]QI Y X,MENG X Q,MU D F,et al.Study on mechanism and factors affecting the gas leakage through clearance seal at nano-level by molecular dynamics method[J].Energy,2016,102(7):43-49.
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