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单排节流孔气浮导轨承载力的数学模型改进与校验分析
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国家自然科学基金项目(51705228);广东省自然科学基金项目(2018A030307017);湛江市科技攻关项目(2016B01012);岭南师范学院校级科研项目(LY1902).


Improvement and Verification of Mathematical Model of Bearing Capacity of Singlerow Restrictors Airbearing Platform
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    摘要:

    以单排节流孔形式的气浮导轨为研究对象,在当前工程上常用的数学模型基础上提出把导轨分为主承载区和端部承载区的改进方案,并编写了相应的承载性能计算器;建立气浮导轨的有限元模型对改进方案的端部压力场进行校验,通过实验对改进方案计算的承载力进行校验。结果表明:改进方案能获得更准确的气膜压力和流场工况;改进前后的气浮导轨承载力数学模型求得承载力随气膜厚度变化的趋势与实验数据一致,但对比实验结果发现,改进后的数学模型平均偏差为133%,较改进前的计算精度提高约61%;尤其当导轨面宽度、节流孔到端部间距、节流孔间距三者有较大差值时,改进模型能更好地指导气浮平台设计。

    Abstract:

    The airbearing platform with singlerow restrictors was taken as the research object.Based on the mathematical model commonly used in current engineering,an improved scheme for dividing the guide rail into the main bearing area and the end bearing area was proposed,and the corresponding bearing capacity calculator was written.The finite element model of the guide rail was established to verify the end pressure field in the improved scheme,and the experiment was carried out to verify the loading capacity calculated by the improved scheme.The results show that the improved scheme can obtain more accurate film pressure and flow field conditions.The trend of the bearing capacity of airbearing platform calculated by the mathematical model of bearing capacity before and after improvement is consistent with that of the experimental data.However,compared with experimental results,the average deviation of the calculation results of the improved mathematical model is 133%,which is about 61% higher than the calculation accuracy of the mathematical model before improvement.Especially when the width of guide rail surface,the distance between throttle orifice and end orifice,and the distance between throttle orifice are quite different,the improved model can better guide the design of airbearing platform.

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莫德云,马平,连海山,弓满锋.单排节流孔气浮导轨承载力的数学模型改进与校验分析[J].润滑与密封,2019,44(6):88-94.
. Improvement and Verification of Mathematical Model of Bearing Capacity of Singlerow Restrictors Airbearing Platform[J]. Lubrication Engineering,2019,44(6):88-94.

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  • 在线发布日期: 2020-03-12
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