共查询到18条相似文献,搜索用时 578 毫秒
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介绍了泵用干气密封在合成氨装置中多年来的使用情况,重点对使用泵用干气密封的经济性进行了分析,并根据多年来的现场实际使用经验提出了泵用干气密封新机配套和改造项目密封方案选型和辅助系统设计中应注意的问题。 相似文献
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分析了本公司液氨泵(G3101A/B)原机械密封频繁失效的原因,根据干气密封的工作原理和特点,提出了液氨泵轴封的双端面干气密封改造方案,给出了模拟试验结果,并介绍了干气密封在液氨泵上的应用情况,指出了操作过程中应注意的问题。 相似文献
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干气密封技术在离心式压缩机等高速流体机械上获得了广泛应用,在泵、反应釜等低转速设备上的应用开始引起重视.综述了国内外泵用干气密封技术及其应用现状,介绍了泵用干气密封的技术特点,包括结构形式、布置方式、端面槽型等,并介绍了成功应用于石化行业的典型案例.同时介绍了主要密封公司典型泵用干气密封产品的技术特点. 相似文献
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GA-601泵改用干气密封前的运行情况。干气密封的作用机理,GA-601泵串联式干气密封的主要特点厦控制系统简介。串联式干气密封的成功运行,极大地提高了泵的性能厦可靠性。 相似文献
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螺旋槽干气密封在普通的离心泵上的使用在近年来国外进口泵上屡见不鲜。我厂各装置上均有这样的泵。其中全密度车间位号G9103,G9104就是典型的一例,但此泵自从国外进口回来以后,一直存在有运转发热的问题,泵壳温度一度达到110℃以上。经过我们的分析,初步确定为是密封造成的发热,为此我们决定对密封的结构进行必要的改造。 1 原密封的结构及系统的冷却形式 该泵采用两级密封串联的结构(如图1),第一级为克兰公司普通的小弹簧,平衡型的8B1-2.5″机械密封,采用石墨对碳化硅组对,第二级为克兰公司28LD-2.25″型干气密封,同样采用… 相似文献
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串联式干气密封在GA-601泵上的应用 总被引:1,自引:0,他引:1
分析了GA-601泵密封改造前的运行情况,介绍了干气密封的作用机理和GA-601泵串联式干气密封的主要特点及控制系统,串联式干气密封的成功运行,较大地提高了泵的性能及可靠性。 相似文献
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串联式干气密封在循环氢压缩机组中的应用 总被引:1,自引:1,他引:0
针对离心式循环氢压缩机工艺特点,选择了适合该机组的带中间进气的串联式干气密封结构厦控制系统。进行了干气密封的设计、选材,并提出产品质量控制、检验标准。密封及系统设计获得成功,串联式带中间迷宫的干气密封在年产140万吨芳烃改造装置循环氢压缩机组首次运用获得成功,保证了循环氢压缩机组的稳定运行。 相似文献
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流体动力润滑螺旋槽非接触机械密封的发展及应用 总被引:1,自引:0,他引:1
详细地分析了非接触机械密封商业产品中的一些二维及三维流体动力槽形、特别是螺旋槽形的动态性能,包括对径向对称与径向弯曲类槽形的流体动力品质;明确地提出了避免非接触机械密封系统发生“半频自激涡动”及流体膜“共振振荡”的理论概念及螺旋槽非接触干气密封应采取顺流方式以获得高刚度而增加其运行稳定性和液体湿式密封应采取逆流方式以实现密封的无泄漏的设计准则;系统地阐述了非接触机械密封在离心气体压缩机和液体泵类上应用的2类体系及其干运行非接触气体密封的检验规范。 相似文献
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The effect of various liquids (oil, water) transferred by centrifugal pumps on the wear rate of their groove seals is studied and the findings are analyzed. The transfer medium was shown to significantly influence the wear rate. The liquid effect can be both positive and negative depending on the metal used to make the components of the groove seal. The wear of the groove seal is low if alloys based on copper are used. To the contrary, the wear increases if groove seals are made of steel, which may be due to the specific physicochemical processes. 相似文献
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Weifeng Huang Youbin Lin Zhi Gao Wenjing Fan Shuangfu Suo Yuming Wang 《Tribology Letters》2013,49(2):379-384
The starting process and the stopping process of a double dry gas seal for pumps were investigated by acoustic emission (AE) testing. The characteristic frequency band of contact of the seal faces was distinguished from noises in three different comparative experiments. The root mean square (RMS) of the AE signals after band-pass filtering was determined to effectively reflect the contact condition of the seal faces. Based on the characteristics of the AE RMS, both the starting process and the stopping process could be divided into three periods, and a lift-off rotational speed and a touch-down rotational speed were defined. The lift-off speed varied non-monotonically with the inlet pressure. The lift-off speed was smallest at a certain pressure, which meant that at that speed the seal faces lift-off most easily. The behavior of the touch-down speed was similar to that of the lift-off speed, but was a little smaller than the latter. These results reveal the potential of AE technology for monitoring the contact condition of dry gas seals during the starting and stopping processes and may help in the design and operation of the dry gas seals. 相似文献
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Three magnetic fluid seals custom engineered to meet specific application objectives are discussed. These seals are: a belt edge seal, a large diameter seal and a centrifugal seal. Extensive experimental data were acquired on the first two seals to determine their performance characteristics. Some of these test results are compared with the theoretical expectations. Numerical computations are made on the centrifugal seal to Predict its sealing capabilites. 相似文献