共查询到20条相似文献,搜索用时 593 毫秒
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将泄漏介质视为不可压缩流体,对其进行力学分析,得出了泄漏介质的流量和压力降等表达式。根据泄漏介质的密封条件,分析了软填料密封行为的两个典型状态,给出了软填料可靠密封的静态准则和动态准则。 相似文献
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本文通过笔者对在实际工作中所遇到的国外引进设备中一些异型弹性密封填料的结构、材料,应用效果及其密封机理的分析和探讨,从而试图解决常用弹性密封填料中存在的一些问题,为对弹性密封填料的研究工作提供一些参考。 相似文献
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一、概况在以水、煤油为基体的液体中,均匀分布大量的强磁体微粒子。将这样的胶体溶液充入到被密封部分(旋转体和静止体之间)的间隙中。在外磁场的作用下,磁流体停止流动,从而可以消除间隙,起到密封作用。 相似文献
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本文提出“密封工程”的观点,“密封工程”包括涉及密封概念的政策,法规,标准,技术,管理,教育和培训等内容。阐述了树立“密封工程”观点的目和意义,指出树立密封工程观点,有利于增强环境保护意识,推动密封技术进步 。 相似文献
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旋转轴封是经常碰到的技术问题,随着生产和技术的进步,对轴封提出更高要求。采用多种密封的组合是解决复杂密封问题的途径之一。本文阐述磁流体——离心密封的组合形式。 相似文献
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The mechanical seal with metal faces, used to seal the bearings in rock drill bits, plays a critical role in ensuring a long service life of the drill bit. A numerical model of such a seal has been developed for use as a design tool. The axisymmetric model encompasses a mixed lubrication elastohydrodynamic analysis, and predicts such quantities as leakage rate, film thickness distribution, fluid pressure and contact pressure distributions, interface temperature and face deformation. Model results show that the behavior of this seal, unlike that of conventional industrial seals, depends strongly on the ambient pressure, not just on the pressure drop across the seal. 相似文献
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水轮机主轴密封的改进 总被引:2,自引:0,他引:2
针对水轮机主轴密封采用传统的盘根密封存在的不足之处,通过对反螺旋式密封、离心式密封原理、结构特点分析,确定了水轮机主轴最佳密封方式为离心式密封。 相似文献
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螺旋密封气吞及密封失效机理分析 总被引:5,自引:2,他引:3
本从泵的角度对螺旋密封“气吞”及“密封失效”现象作出了合理,全面的解释,并提出一种新型组合螺旋密封,分析结果表明,转速较高时,迷宫螺旋密封优于组合螺旋密封,优于单一结构螺旋密封,具有一定的工程使用价值。 相似文献
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针对离心式水泵填料密封存在的不足之处,通过对螺旋-填料组合密封的原理及方案分析,改进了离心泵的密封结构。取得了良好的密封效果及经济效益。 相似文献
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随着密封技术的发展,传统的密封技术不断得到改进,新密封技术也不断推陈出新,本文就几种密封技术(如磁流体密封、干气密封、蜂窝密封、刷式密封)作简要的概述及密封技术在软件开发上发展。 相似文献
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Operation of a non-contact compliant gas foil seal (CFS) in a high temperature hybrid dynamic simulator representative of a small gas turbine engine spool is discussed. At the hot section of the simulator two oil-free components, a CFS and a compliant foil bearing (CFB) were mounted and at the cold (compressor) section of the simulator, an oil-mist lubricated ball bearing was installed. The preliminary numerical study on the fluid flow and thermal analysis of a CFS was discussed in the previous work by the authors. The experimental results for successful operation of the foil bearing and foil seal at temperatures up to 560 °C and speeds up to 55,000 rpm are presented. The surface of the CFS and CFB journals for high temperature tests were coated with PS304 solid lubricant film, developed by NASA The CFS performance at different operating speeds and temperatures and differential pressures was investigated. In a similar test, a leakage flow comparison was made among a labyrinth seal, a brush seal and a CFS. The experimental results indicate superior performance of the CFS over the two other types of seals. Unlike brush seal, CFS showed no evidence of rub or induced wear on the journal or seal surface. 相似文献