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阀芯与阀腔微观表面对缝隙流动的影响
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江苏省自然科学青年基金项目(BK20130741);江苏省高校自然科学基金项目(13KJB460009).


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    摘要:

    基于液压挖掘机多路阀阀芯与阀腔微观表面的分形特征,通过WM函数,建立阀芯与阀腔的表面数学模型;通过Matlab软件进行编程,建立各向异性的三维表面形貌模型,并比较不同分形维数对阀芯与阀腔表面形貌的影响。针对阀芯与阀腔间的缝隙流动,建立缝隙流动模型,通过Fluent软件来分析液压油在缝隙中流动时油压和油速的变化。结果表明:随着分形维数的增大,阀芯的表面粗糙度呈增大的趋势;液压油在缝隙中流动时,表面粗糙度对压力降有着重要的影响,对流体的流速有一定的影响,阀芯与阀腔的表面粗糙度越大,油液的压力降越大,流速越小。

    Abstract:

    Based on the fractal characteristic of spool and valve chamber microscopic surface for hydraulic excavator multi-way valve, a mathematical model for the surface of spool and valve chamber was established via the function of W-M. Through Matlab software programming, three-dimensional surface topography model was established, and the effect of different fractal dimension on the surface topography of spool and valve chamber was compared. The gap flow model on the gap between the spool and valve chamber was established. The change of pressure and velocity of the hydraulic oil flowing in the gap was analyzed by Fluent software. The results show that along with increasing of the fractal dimension, the surface roughness of valve spool is in the trend of increasing. The surface roughness has great effect on pressure drop of the hydraulic oil flowing in the gap, and certain effect on oil velocity. The larger the surface roughness of spool and valve chamber is,the greater the pressure drop of oil, and the smaller the oil velocity is.

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王栋梁,徐海涵,贾文华,殷晨波,叶 仪.阀芯与阀腔微观表面对缝隙流动的影响[J].润滑与密封,2015,40(6):32-35.
.[J]. Lubrication Engineering,2015,40(6):32-35.

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  • 在线发布日期: 2015-11-24
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