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基于Mooney-Rivlin本构模型,对轨道车辆空调送/回风口处橡胶密封条(简称橡胶密封条)的压缩性能进行分析,并与橡胶密封条的单轴压缩试验(简称试验)测试的压缩性能进行对比。结果表明:橡胶密封条试样的仿真分析与试验测试的压缩量误差在整个压缩区间内均小于10%,采用Mooney-Rivlin本构模型分析橡胶密封条试样的压缩性能是可靠的;橡胶密封条的仿真分析与试验测试的压缩量误差在整个压缩区间内均小于10%,进一步验证了采用Mooney-Rivlin本构模型分析橡胶密封条的压缩性能的可靠性。本研究可为其他橡胶制品的非线性特性分析提供参考。 相似文献
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对目前国内常用的汽车橡胶密封条用金属骨架的材质、类别、加工和应用进行分析。汽车橡胶密封条用金属骨架的材料主要有碳素结构钢、不锈钢和铝材。汽车橡胶密封条用金属骨架按加工工艺可分为滚剪拉伸带、滚压带、冲切带、钢丝编织带、平板带等;按材质可分为钢带、铝带、钢丝编织带等。目前国内汽车橡胶密封条用金属骨架以DC03+CX90系列钢带、SPCC系列钢带的应用最为广泛,欧系车密封条多采用5754系列铝带。汽车门框密封条、行李箱密封条、发动机盖密封条、水切密封条、天窗密封条、B柱中缝密封条等都广泛地采用金属骨架结构。减小厚度和轻量化是汽车橡胶密封条用金属骨架的主要研究方向。 相似文献
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门窗密封条现有纯胶密封条和复合密封条两种,而复合密封条又有橡胶——金属、橡胶——金属——海绵、橡胶一金属——塑料和橡胶——植绒四个类型。该密封条又因具有防水、防尘、防噪音和密封等作用而在汽车、火车、其它车辆和建筑工业门窗得到广泛应用。部分生产密封条的企业,为改善生产装 相似文献
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《橡胶科技市场》2005,(1)
部分新行业标准发布国家发展和改革委员会日前发布2004年第61号公告,公布了一系列新的行业标准。这些新标准自2005年4月1日起实施。在汽车行业的23项新标准中,同橡胶行业有关的有12项(见下表)。标准编号标准名称代替标准QC/T6392004汽车用橡胶密封条QC/T6392000QC/T6402000QC/T7092004汽车密封条压缩永久变形试验方法QC/T7102004汽车密封条压缩负荷试验方法QC/T7112004汽车密封条值绒耐磨性试验方法QC/T7162004汽车密封条保持力和插入力试验方法QC/T2432004汽车车轮安装平面度要求及检验方法QC/T2431997QC/T7172004汽车车轮跳动… 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
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Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
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利用组件技术开发化工原理实验课件,给出了系统层、组件库层和应用层的架构划分。重点讨论了组件库的设计,给出了流体阻力这一典型实验的实现描述。实践证实,基于组件技术可以提高仿真实验的开发效率。 相似文献