共查询到19条相似文献,搜索用时 78 毫秒
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介绍了氧化铝生产重要工艺设备一大型工业回转窑新型密封的结构原理及安装工艺,此密封装置,原理先进,结构复杂,安装精度高. 相似文献
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通过埋设非金属砌体、安装电偶及喇叭短管,开发设计了一种高温高压密封容器取样装置,该装置利用不同材质非金属耐火砖随温度变化形变不同的原理,解决了制约高温、高压密封容器中检测参数无法正常取样的问题,装置结构简单、制造成本低、安装使用方便。 相似文献
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约15年前QIT-FeretTitane公司开发了一种新型的可伸缩炉顶电极密封装置,它被广泛安装在电炉上,并运行得很好,且可在各种不同的冶炼条件,从高温有毒的一氧化碳烟气到温度较低的含二氧化硫炉气下保持正常操作.这种密封装置通常为水冷式,但自然气冷装置也可以采用.安装这种密封装置有下列优点:显著改善厂内环境和大量节省通风需求;减少炉子漏风,从而减少了需净化的废气量和降低了电力及电极消耗本文论述了可伸缩电极密封装置的操作过程并阐述了为各种不同操作条件下的炉子提供密封装置设计的进展情况。 相似文献
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介绍Φ4 5× 10 0m回转窑窑头密封装置的结构及先后两次对其进行的改造 ;改造后的密封装置结构简单 ,制作安装方便 ,密封效果好 ,使用寿命长 相似文献
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对国外引进的悬浮预热器窑窑尾密封装置存在的问题进行分析探讨,研究设计并安装自提料接触式密封装置。满足了生产及工艺条件的要求,适应回转窑运行特性,取得了预期的效果。 相似文献
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分析了高压SF6全封闭组合电器(气体绝缘开关GIS)设备安装过程中应注意的若干技术问题,叙述了安装的工艺流程、技术条件、要求等。 相似文献
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本文以YW150-400型长轴液下泵"振动是如何产生的?"为引题,从设备的安装要求、设备结构特点及改进分析,以及备品备件选购知识等方面剖析了振动产生的根源和原填料密封方式缺陷引起密封泄漏问题,根据实际工作中的探索,回答了解决振动的方式方法,提出了已经成功改进的"多重组和密封"结构特点及效果,为长轴液下泵的密封技术做出了有力的探索。 相似文献
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通过对矿山深部灰岩开展分级加载单轴蠕变试验,获取了不同应力水平下轴向和径向蠕应变,基于试验结果,分析各分级应力水平下轴向蠕应变、径向蠕应变和体应变的变化规律,研究轴向和径向蠕应变与各分级总应变的比值关系,并将该比值依次定义为蠕变效应比Kz、Kh,二者之差为Kh-z。研究发现:随着应力水平的提高,各分级轴向和径向蠕应变均先增加后减小;当恒载应力小于51 MPa时,试样体积压缩, Kh-z在±0.28%范围内,表明轴向蠕变与径向蠕变效应彼此相当;当超过该应力水平后,试样扩容,Kz和Kh剧增,Kh-z由0.21%突增至2.64%,在试样发生蠕变破坏时达到峰值,表明与轴向蠕变相比,在扩容阶段径向蠕变效应更加明显。选用西原体模型来描述灰岩轴向蠕变特性,通过曲线拟合的最小二乘法求取蠕变模型参数,R2均值为0.931,拟合效果较好。 相似文献
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The influence of the installation method on the soil flow pattern, resulting external radial total stress changes, and final external shaft friction after consolidation has been investigated for caissons in soft clay by means of centrifuge model tests, large deformation finite-element (FE) analysis, and a simple cavity expansion approach. Both the centrifuge measurements and the FE results show that more soil is forced into the caisson under suction than under jacking. However, the difference in the resulting external radial total stress changes or penetration-induced excess pore-water pressure is much less significant, since the expansion-induced excess pore pressure is smaller for thin-walled caissons than for driven piles. After subsequent consolidation, the influence of the installation method reduces further, and the final shaft friction ratios are close for the two installation methods. Based on the magnitude of heave ratios derived from the centrifuge measurements and the FE analysis, a simple form of cavity expansion approach can reasonably estimate external radial stress changes during installation and after consolidation, and final shaft friction ratios for the caissons. An approach for estimating the external shaft friction ratios for vertical pullout of sealed caissons is proposed. 相似文献
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介绍了立式长轴泵和无密封自吸泵的结构、工作原理和安装维护等,从效率、汽蚀性能和适用工况性能等方面对两种泵进行比较,作为不同工况下选型的依据。 相似文献
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This work aims at determining the constitutive model of four commercial water atomised low alloyed steel powders during cold compaction. Single-action experiments were performed, obtaining cylindrical specimens with different H/D ratios. The distribution of axial and radial stresses was investigated, and the relationships describing both the radial stress transmission coefficient and the flow stress as functions of the relative density were determined. The radial stress transmission coefficient also confirmed the hypothesised value of Poisson’s coefficient. The friction coefficient between the powder column and the die wall was determined, also highlighting the influence of the H/D ratio. Measuring the axial and radial strains due to spring-back, the axial and radial elastic moduli were determined, as functions of the relative density. The results obtained for the four materials were compared, also highlighting both differences and similarities. 相似文献