高速螺旋槽气体润滑端面密封件热变形传热模型

IF 6.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Chunhong Ma , Shaoxian Bai
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引用次数: 0

摘要

热传导引起的密封面热变形直接影响密封运行的稳定性。在此,考虑到气体的可压缩性和窒息流效应,建立了螺旋槽气体端面密封的传热分析模型。然后,根据所提出的传热模型进行了热力流体动力润滑(TEHL)分析,计算了摩擦热通量、表面传导热通量和薄膜吸附热通量,并分析了不同运行参数(包括转速、密封温度和密封压力)下的密封面变形情况。结果表明,气体膨胀引起的吸附热使薄膜冷却,这通常会导致复杂的温度分布,并在热变形中起着不可忽视的重要作用。对于螺旋槽端面密封,密封压力和转速的增加会使吸附热量因槽的泵送效应而显著增加。更重要的是,可以通过改变密封宽度来控制热变形。在这里,对于螺旋槽端面密封,随着密封宽度从 5 毫米增加到 13.1 毫米,间隙可以从发散转移到收敛。这为气体端面密封设计中的畸变控制提供了一种潜在的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A heat transfer model for thermal distortions in high speed spiral groove gas lubricated face seals
The thermal distortions of seal face caused by heat transfer directly affect the stability of seal operation. Here, a heat transfer analysis model of spiral groove gas face seal is established taking account of gas compressibility and choked flow effect. Then, a thermoelastohydrodynamic lubrication (TEHL) analysis is carried out based on the proposed heat transfer model, frictional heat flux, surface conduction heat flux, and film adsorption heat flux are calculated, and face distortions are also analyzed under different operating parameters including rotational speed, seal temperature and seal pressure. It is shown that, the adsorption heat induced by gas expansion makes the film cooling, which often leads complex temperature distributions and plays an important and non-ignored role in thermal distortions. For the spiral groove face seal, the increase of seal pressure and rotational speed makes the adsorption heat increase significantly due to pumping effect of grooves. The more important is that the thermal distortions may be controlled by changing seal width. Here, for the spiral groove face seal, the clearance can transfer divergent to convergent with increasing seal width from 5 mm to 13.1 mm. This provides a potential way for distortion control in gas face seal design.
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来源期刊
Tribology International
Tribology International 工程技术-工程:机械
CiteScore
10.10
自引率
16.10%
发文量
627
审稿时长
35 days
期刊介绍: Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.
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