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In this study, taking the sealing structure of oil pump flanges as the research object, a rough peak contact model and a parallel flat plate leakage model are further established to calculate the leakage rate of the sealing surface based on the contact pressure distribution on the sealing surface obbtained by finite element mechanical analysis. At the same time, the time-temperature equivalent model of rubber performance is established by rubber accelerated aging test so as to predict rubber sealing life. Finally, the rubber sealing life is verified by seal leakage rate bench test, proving that the test result is basically consistent with the prediction result.
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以油泵法兰密封结构为研究对象,在有限元力学分析得到密封面接触压力分布的基础上,进一步建立粗糙峰接触模型和平行平板泄漏模型计算密封面的泄漏率。同时通过橡胶加速老化试验建立橡胶性能的时温等效模型,从而预测橡胶的密封寿命,最后通过密封泄漏率台架试验进行验证,试验结果与预测结果基本一致。
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饶聪(1993—),男,硕士学位,工程师,主要研究方向为发动机仿真分析。
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O型橡胶圈网格示意, figureFileSmall=U7iJlcwfS1qeTjfl3/5HzQ==, figureFileBig=FDxN/a+dFd4TdS8QJJndfg==, tableContent=null), ArticleFig(id=1195336552869053105, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=EN, label=null, caption=null, figureFileSmall=lHuno/w/HN/d8lkHT5WtJg==, figureFileBig=EcBNYloX8gwmD8mtINquQA==, tableContent=null), ArticleFig(id=1195336552931967666, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=CN, label=图7, caption=
O型橡胶圈米塞斯应力分布, figureFileSmall=lHuno/w/HN/d8lkHT5WtJg==, figureFileBig=EcBNYloX8gwmD8mtINquQA==, tableContent=null), ArticleFig(id=1195336553007465139, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=EN, label=null, caption=null, figureFileSmall=pxoKTptod42hLJ4GOmr7uw==, figureFileBig=DL1DlIxeVFKat0946EgHhA==, tableContent=null), ArticleFig(id=1195336553120711348, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=CN, label=图8, caption=
O型橡胶圈接触应力分布, figureFileSmall=pxoKTptod42hLJ4GOmr7uw==, figureFileBig=DL1DlIxeVFKat0946EgHhA==, tableContent=null), ArticleFig(id=1195336553187820213, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=EN, label=null, caption=null, figureFileSmall=iftPU223WXAJGR37VCxJEQ==, figureFileBig=+qbP31y6k/yBHFwwTU/qiQ==, tableContent=null), ArticleFig(id=1195336553254929078, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=CN, label=图9, caption=
不同密封间隙的接触应力分布, figureFileSmall=iftPU223WXAJGR37VCxJEQ==, figureFileBig=+qbP31y6k/yBHFwwTU/qiQ==, tableContent=null), ArticleFig(id=1195336553326232247, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=EN, label=null, caption=null, figureFileSmall=ieypAmKdI/BF6SoYdAjITg==, figureFileBig=OjjVCqFGwkIUeg/DRx+sfw==, tableContent=null), ArticleFig(id=1195336553384952504, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=CN, label=图10, caption=
泄漏通道介质压力分布示意, figureFileSmall=ieypAmKdI/BF6SoYdAjITg==, figureFileBig=OjjVCqFGwkIUeg/DRx+sfw==, tableContent=null), ArticleFig(id=1195336553447867065, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=EN, label=null, caption=null, figureFileSmall=rGkfZddNwRbBDtuNFx2yng==, figureFileBig=fX7yMOL6A0EbwJo3EzvEOw==, tableContent=null), ArticleFig(id=1195336553535947450, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=CN, label=图11, caption=
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间隙与泄漏率的关系, figureFileSmall=7tOonxmko5lzUsdoSgQqSw==, figureFileBig=Uxzmy+ukqyi6YEbRkoxL0A==, tableContent=null), ArticleFig(id=1195336553741468349, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=EN, label=null, caption=null, figureFileSmall=7TUmVFGYhGum0WSotTU0gg==, figureFileBig=pNqy8qLMq9E3uMVnZnvHZA==, tableContent=null), ArticleFig(id=1195336553800188606, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=CN, label=图13, caption=
压缩永久变形测试原理, figureFileSmall=7TUmVFGYhGum0WSotTU0gg==, figureFileBig=pNqy8qLMq9E3uMVnZnvHZA==, tableContent=null), ArticleFig(id=1195336553863103167, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=EN, label=null, caption=null, figureFileSmall=Q5DNqk0vv1lY38pOjOlOLg==, figureFileBig=C6N69LG46l6FqFPhqxxqrg==, tableContent=null), ArticleFig(id=1195336553934406336, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=CN, label=图14, caption=
压缩永久变形在不同老化温度下随老化时间的变化关系, figureFileSmall=Q5DNqk0vv1lY38pOjOlOLg==, figureFileBig=C6N69LG46l6FqFPhqxxqrg==, tableContent=null), ArticleFig(id=1195336554005709505, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=EN, label=null, caption=null, figureFileSmall=awcR/o0RJeFP2XdBjvDUOw==, figureFileBig=SYkUSAQeomXwuyDg2Jl/XA==, tableContent=null), ArticleFig(id=1195336554068624066, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=CN, label=图15, caption=
接触应力随老化时间的变化关系, figureFileSmall=awcR/o0RJeFP2XdBjvDUOw==, figureFileBig=SYkUSAQeomXwuyDg2Jl/XA==, tableContent=null), ArticleFig(id=1195336554207036099, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=EN, label=null, caption=null, figureFileSmall=xOoVbYROBUku1XgIsnyS7g==, figureFileBig=6DbKdJtNah9Mx7PSRhX7JQ==, tableContent=null), ArticleFig(id=1195336554282533572, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=CN, label=图16, caption=
橡胶密封泄漏率试验台架, figureFileSmall=xOoVbYROBUku1XgIsnyS7g==, figureFileBig=6DbKdJtNah9Mx7PSRhX7JQ==, tableContent=null), ArticleFig(id=1195336554362225349, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195319421066584955, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 零件 | 材料 | 弹性模量 /MPa | 泊松比 | 热膨胀系数(100 ℃) /×10-5 ℃-1 |
| O型圈 | 氟橡胶 | 12 | 0.49 | 20.56 |
| 盖板 | 16MnR | 2.09×105 | 0.28 | 1.2 |
| 法兰 | QT450 | 1.73×105 | 0.30 | 1.0 |
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活塞环优化参数及范围
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| 零件 | 材料 | 弹性模量 /MPa | 泊松比 | 热膨胀系数(100 ℃) /×10-5 ℃-1 |
| O型圈 | 氟橡胶 | 12 | 0.49 | 20.56 |
| 盖板 | 16MnR | 2.09×105 | 0.28 | 1.2 |
| 法兰 | QT450 | 1.73×105 | 0.30 | 1.0 |
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| i | 1 | 2 | 3 |
| μi | -1 466.62 | 728.72 | 738.00 |
| αi | -0.421 41 | -0.277 01 | -0.566 32 |
| λi | 0.368 85 | 0 | 0 |
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橡胶材料3阶Ogden模型参数
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| i | 1 | 2 | 3 |
| μi | -1 466.62 | 728.72 | 738.00 |
| αi | -0.421 41 | -0.277 01 | -0.566 32 |
| λi | 0.368 85 | 0 | 0 |
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| 老化温度/℃ | 老化时间/天 | 老化温度/℃ | 老化时间/天 |
| 225 | 1 | 140 | 69 |
| 225 | 3 | 140 | 207 |
| 225 | 5 | 140 | 345 |
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不同老化温度和老化时间等效关系
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| 老化温度/℃ | 老化时间/天 | 老化温度/℃ | 老化时间/天 |
| 225 | 1 | 140 | 69 |
| 225 | 3 | 140 | 207 |
| 225 | 5 | 140 | 345 |
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| 225 ℃老化时间/天 | 泄漏率/mL·h-1 |
| 1 | 0 |
| 3 | 0.011 52 |
| 5 | 0.040 31 |
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不同老化时间下泄漏率
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| 225 ℃老化时间/天 | 泄漏率/mL·h-1 |
| 1 | 0 |
| 3 | 0.011 52 |
| 5 | 0.040 31 |
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| 老化时间/天 | 测试时间/h | 仿真泄漏率 /mL·h-1 | 试验泄漏率 /mL·h-1 | 误差 /% |
| 1 | 5 | 0 | 0 | 0 |
| 3 | 5 | 0.011 52 | 0.009 41 | 22.4 |
| 5 | 2 | 0.040 31 | 0.038 50 | 4.7 |
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| 老化时间/天 | 测试时间/h | 仿真泄漏率 /mL·h-1 | 试验泄漏率 /mL·h-1 | 误差 /% |
| 1 | 5 | 0 | 0 | 0 |
| 3 | 5 | 0.011 52 | 0.009 41 | 22.4 |
| 5 | 2 | 0.040 31 | 0.038 50 | 4.7 |
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