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某厂的两套加氢装置使用了由国外设计、制造的H-H型螺纹锁紧环换热器,由于设计不合理,在停车对换热器进行拆装时,出现了外圈螺栓粘结、螺纹锁紧环螺纹损坏、内法兰螺栓拆卸困难和密封泄漏等问题,通过采取改变螺栓结构和改进拆装程序与方法等措施,完成对换热器的检修,也方便换热器以后的拆装检查。 相似文献
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加氢装置高压换热器密封的分析比较 总被引:1,自引:0,他引:1
就加氢装置中高压换热器密封结构的3种型式:八角垫密封、螺纹锁紧环密封、Ω形环密封的工作原理、结构特点、密封载荷、泄漏原因等方面进行了分析和比较,提出的问题和建议对加氢装置中高压换热器密封的设计和使用有较大帮助。 相似文献
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以某石化加氢装置高压螺纹锁紧环换热器检修为成功案例,经过提炼和总结。叙述了高压螺纹锁紧环换热器的现场检修程序及注意事项,旨在探讨高压纹锁紧环换热器的现场检修可行性及积累更多的检修经验。 相似文献
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对一台大直径螺纹锁紧环式双壳程换热器的选材、独特的密封结构设计、垫片的选择和结构的优化等方面做了介绍,并给了接管与壳体合理的焊接结构。 相似文献
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金汉荣 《机械工人(冷加工)》1987,(5)
为防止螺纹紧固中的螺母松动,常采用锁紧垫圈、开口销、粘接等方法,但使费用增加,且防松效果有时欠佳。现介绍几种螺纹锁紧防松新法。变牙形的螺纹锁紧系采用带锁紧螺纹的螺母与标准螺栓配用,,来 相似文献
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引进螺纹锁紧环换热器缠绕垫的国产化研制 总被引:1,自引:1,他引:0
IMB螺纹锁紧环换热器首次大修,结合高温,高压、大直径基本型缠绕垫的研究,设计,制造,试验,安装,使用的国产化进程,从原料选择,几何尺寸,结构形式,制造工艺,检验测试等方面阐述W型缠绕垫的质量控制,为螺纹锁紧环换热器垫片的国产化设计,制造提供参考。 相似文献
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In a recent paper, the Ritz method with simple algebraic polynomials as trial functions was used to obtain an eigenvalue equation for the free vibration of a class of homogeneous solids with cavities. The method presented is here extended to the study of a class of non-homogeneous solids, in which each solid is composed of a number of isotropic layers with different material properties. The Cartesian coordinate system is used to describe the geometry of the solid which is modelled by means of a segment bounded by the yz, zx and xy orthogonal coordinate planes and by two curved surfaces which are defined by fairly general polynomial expressions in the coordinates x, y and z. The surface representing the interface between two material layers in the solid is also described by a polynomial expression in the coordinates x, y and z. In order to demonstrate the accuracy of the approach, natural frequencies are given for both a two- and three-layered spherical shell and for a homogeneous hollow cylinder, as computed using the present approach, and are compared with those obtained using an exact solution. Results are then given for a number of two- and three-layered cylinders and, to demonstrate the versatility of the approach, natural frequencies are given for a five-layered cantilevered beam with a central circular hole as well as for a number of composite solids of more general shape. 相似文献
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通过分析膨胀套在实际使用产生滑移受阻现象、卡死现象原因的实质,并在分析产生问题原因的基础上提出了改进措施即:增加导向机构。 相似文献
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设计了磨粉机快辊轴承座的加工工艺和具体的工装夹具.利用卧式加工中心加工磨粉机快辊轴承座,辅以能够高效快速夹紧的夹具,既可以保证加工精度,又能够提高加工效率. 相似文献
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一种涡旋压缩机径向随变机构的设计 总被引:1,自引:0,他引:1
详细介绍了运用随变原理设计的一种新型径向密封机构的结构特点,工作原理及主要参数的确定方法,该机构可补偿由于涡旋体加工精度不高而造成的功率损失,适用于涡旋压缩机的批量生产。 相似文献
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针对目前市场对工业设计人才的需求,本文论述了我校在工业设计教育方面的改革措施,着重介绍了我校工业设计教育在软件和硬件方面所进行的一系列的改革。 相似文献
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V. P. Dragunov E. G. Kostsov 《Optoelectronics, Instrumentation and Data Processing》2009,45(3):234-242
Specific features of operation of one- and two-capacitor microelectromechanical converters (MEMC) of energy of mechanical microscopic vibrations into electric energy with a modulated electrode-gap magnitude and with allowance for the mutual influence of electrical and elastic forces are analyzed, and the characteristics of these two devices are compared. The main factors restricting the increase in MEMC power are demonstrated to be the effects of “collapsing” and the condition of conservation of positive rigidity of the system. Expressions for estimating the limiting MEMC parameters are derived. The possibility of electrical energy generation in the presence of “real“ sources of wide-spectrum microscopic vibrations is considered. 相似文献
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本文以某些积算和双笔记录仪产品为例说明由于仪表功能设计的不合理或选型不当,影响了仪表的正常使用,制造厂和用户应关注这类问题。 相似文献