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石墨填料垫片变形特性研究

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针对石墨填料垫片会在使用过程中发生边角撕裂的问题,本文基于密封试验台结构及材料的弹塑性,建立了垫片系统的有限元模型,模拟了垫片的压缩回弹过程,并通过压缩回弹实验验证了模型的准确性.通过分析石墨填料垫片在不同尺寸、压缩率及侧面间隙的条件下,加卸载过程中的压缩回弹曲线变化,验证了石墨填料垫片边角应力集中现象.通过分析上密封面和侧密封面的应力分布,阐述了石墨填料垫片边角撕裂是由于上表面两侧过大的应力峰值导致的,且包边结构能明显改善垫片压缩后的边角撕裂问题.
Study on the deformation characteristics of a graphite gasket
To solve the problem of corner tearing of graphite packing gaskets in use,a finite element model of a gasket system was established based on the elastoplasticity of the structure and materials of the existing sealing test bed to simulate the compression and springback processes of a gasket.The accuracy of the model was verified through compression and springback experiments.The stress concentration phenomenon of the edge angle of the graphite packing gaskets was verified by analyzing the change in the compression rebound curve during the loading and unloading of graphite packing gaskets in different sizes,compression ratios,and side clearances.By analyzing the stress distribution of the upper-and side-sealing surfaces,it is revealed that the edge tearing of graphite gaskets is caused by excessive stress peaks on both sides of the upper surface,and the edge-wrapping structure can signifi-cantly improve the edge tearing problem of gaskets after compression.

flexible graphite gasketedge-enclosed gasketfinite element analysisdeformation characteristicscontact pressurecompression reboundstress distributionedge tearing

姚建均、孙双海、王枭、李英朝、萧冠华

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哈尔滨工程大学 机电工程学院,黑龙江 哈尔滨 150001

西安荣耀终端有限公司,陕西 西安 710000

柔性石墨垫片 包边垫片 有限元分析 变形特性 接触压力 压缩回弹 应力分布 边角撕裂

黑龙江省自然科学基金中央高校基本科研业务费专项

E20180193072020CF0704

2024

10.11990/jheu.202206051

哈尔滨工程大学学报
哈尔滨工程大学

哈尔滨工程大学学报

CSTPCD北大核心
影响因子：0.655
ISSN：1006-7043
年,卷(期)：2024.45(6)