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热固耦合形变对BOG压缩机迷宫密封间隙的影响
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国家自然科学基金项目(61573249);国家青年自然科学基金项目(51505298).


Effect of ThermalSolid Interaction Deformation on the Sealing Clearance of Labyrinth of the BOG Compressor
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    摘要:

    大型BOG往复压缩机的压缩介质温度很低,气缸和活塞体在工作中承受着较大的应力载荷和温度负荷,对活塞与气缸的间隙产生显著影响,并间接影响迷宫密封性能。为研究热固耦合形变对迷宫密封的影响,以某大型BOG往复式压缩机为例,以ANSYS Workbench为仿真平台,采用热固耦合方法对气缸和活塞进行仿真分析,得到气缸与活塞在热固耦合作用下的形变规律,确定其形变量对密封间隙的影响。结果表明:在热固耦合作用下,活塞和气缸两者变形量最大值均发生在活塞向上压缩的行程末端,其中,气缸变形量最大发生在缸体顶沿位置,活塞最大变形发生在活塞顶部端面中间环形部位。模拟分析表明,活塞与气缸产生的变形可使该大型BOG往复式压缩机压缩过程中密封间隙增加01~015 mm的变形量。

    Abstract:

    With the low temperature of compression medium for the BOG labyrinth compressor,the cylinder and piston are subjected high temperature loads and stress loads,which has a significant impact on the sealing clearance between piston and cylinder,and indirectly affects the labyrinth sealing performance.Focused on the influence of thermalsolid coupling deformation on labyrinth seal,with the largescale BOG reciprocating compressor as the case study,the cylinder and piston were simulated and analyzed by thermalsolid coupling method using ANSYS Workbench simulation platform.The deformation rule of the cylinder and piston under the action of thermalsolid coupling was investigated,and the effect of the deformation variables on the sealing clearance was discussed.The results show that the maximum deformation of the piston and the cylinder occurs at the stroke end of the upward compression under the action of thermomechanical coupling.The maximum deformation of the cylinder occurs at the top edge of the cylinder and the maximum deformation of the piston occurs at the middle ring of the top end face.The simulation result shows that the sealing clearance deformation of the large BOG reciprocating compressor in the compression process is increased between 0.1 mm and 0.15 mm because of the deformation of piston and cylinder.

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汤赫男,李赫,王世杰.热固耦合形变对BOG压缩机迷宫密封间隙的影响[J].润滑与密封,2018,43(11):24-27.
. Effect of ThermalSolid Interaction Deformation on the Sealing Clearance of Labyrinth of the BOG Compressor[J]. Lubrication Engineering,2018,43(11):24-27.

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  • 在线发布日期: 2019-07-04
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