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压气机级间台阶篦齿封严的封严性能研究
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国家自然科学基金项目(51505482);中国民航局科技计划项目(MHRD20160106);中央高校基本科研基金项目(3122015C015); 中国民航大学科研启动基金项目(2014QD02S);福建省清洁燃烧与能源高效利用工程技术研究中心开放课题(KF201703).


Research on Sealing Performance of Stepped Labyrinth Seal in Compressor Stages
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    摘要:

    以压气机级间的三台阶篦齿封严结构为研究对象,研究篦齿封严间隙、篦齿深度、篦齿前后倾角、衬套开槽的深度对台阶篦齿封严的泄漏特性、温升特性和旋流特性的影响。研究结果表明:篦齿封严间隙和篦齿前倾角对封严性能有较大影响;随封严间隙的减小,实际泄漏流量明显减小、风阻温升明显增大、旋转比减小,封严间隙从10 mm减小到02 mm,实际泄漏流量减小幅度为73%,系统的风阻温升增大幅度为78 K,系统旋转比从033减小到027;随篦齿前倾角的增大,实际泄漏流量微弱减小、风阻温升微弱增大,而前倾角对系统的旋转比影响不大,前倾角从0°增大到30°,实际泄漏流量减小幅度为20%,系统风阻温升增大幅度为7 K。因此,可以通过适当减小封严间隙和增大篦齿前倾角来达到减小泄漏流量的目的。

    Abstract:

    The threestepped labyrinth seal structure between the compressor stages was studied as the object of study.The effects of the gaps of the labyrinth,the depth of the labyrinth,the angle of inclination of the labyrinth,the height of bushing slot on leakage characteristic,windage heating characteristics,and swirling characteristics were studied.The results show that the sealing gap and the front inclined angle have a significant effect on the sealing performance.With the decrease of the sealing gap,the actual leakage mass flow is decreased significantly,the windage heating of the system is increased,and the swirl ratio of the system is decreased. When the sealing gap is decreased from 10 mm to 02 mm,the actual leakage flow is decreased by 73%,the windage heating of the system id increased by 78 K,and the system swirl ratio is decreased from 033 to 027.With the increase of the front angle,the actual leakage mass flow is decreased slightly and the windage heating of the system is increased slightly.When the front inclined angle is increased from 0° to 30°,the actual leakage mass flow is decreased by 20%,and the system windage heating is increased by 7 K.Therefore,the leakage flow can be reduced by appropriately reducing the sealing gap and increasing the front inclined angle of the labyrinth.

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何振鹏,王伟韬,刘佳杭.压气机级间台阶篦齿封严的封严性能研究[J].润滑与密封,2019,44(10):21-31.
. Research on Sealing Performance of Stepped Labyrinth Seal in Compressor Stages[J]. Lubrication Engineering,2019,44(10):21-31.

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  • 在线发布日期: 2020-03-12
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