旧车床改制缠绕机

针对目前国内缠绕式垫片生产专用设备－缠绕机普遍结构简陋,工艺落后,生产出的垫片质量不高,而研制出的新型缠绕机价格偏高的状况,采用旧的C618或C620车床,经改造并添加自制的控制仪器后,成功地制造出了较普通密封件厂先进的缠绕机。经产品性能对比试验和现场使用,该机完全可与新型缠绕机相媲美,得到了用户的好评。     

Combustion of wood equipping package shock absorbers: after regulatory fire test

According to IAEA regulation, type B packages are designed to withstand a fire test following the mechanical tests, simulating accident conditions during transport. The wood of the shock absorber located near the damage zones produced by these tests may ignite and the conditions of air accessibility inside the absorber could mean that wood smouldering persists during the cooling period. IRSN has conducted an experimental study in which a real scale shock absorber specimen has been exposed to a large scale heptane pool fire test. A dedicated facility makes it possible to simulate the thermal power of the package contents and to measure in real time the heat transfer at the rear surface of the absorber. After a pool fire of 35 min duration, wood combustion continued for four days. Significant values were measured on the contact surface between lid and shock absorber for heat flux (up to 8 kW m^?2) and temperatures (reaching 460°C). The impact of wood smouldering induced heat fluxes on typical lid gaskets has also been evaluated.     

PTFE缠绕垫片旋转法兰的强度及密封性能研究

带垫片的螺栓法兰为压力容器管道的重要连接件,现行的基于Waters算法的规则设计难以保证法兰连接承受复杂载荷的完整性及密封有效性,根据欧盟标准BS EN 13445-3-2009附录GA的设计原则,建立PTFE缠绕垫片的压缩回弹本构关系,采用3D非线性有限元方法分析垫片及螺栓连接的旋转法兰组件受到内压及外载作用的强度及密封性能,结果表明螺栓预紧及操作条件下垫片法兰的密封性能及强度性能满足要求,螺栓预紧力的确定与内压及外载的大小,动态变化的垫片压应力、螺栓分散性有关。     

压缩无石棉密封垫片密封性能的试验研究

本文对几种压缩无石棉密封垫片的密封性能进行了较系统的试验研究，结果表明无石棉密封垫片的整体密封性能尚难与传统压缩石棉橡胶垫片媲美，但国产无石棉密封垫片的密封性能已可与进口垫片相比较。     

Sealing Performance of Gasketed Bolted Flanged Joints: A Fuzzy Decision Support System Approach

The paper describes a fuzzy decision support system (FDSS) and its application to the selection of sets of optimal parameters to characterise the gasket sealing performance in gasketed bolted flanged joints. The FDSS of fuzzy logic theory is applied considering the gas pressure, gasket deflection, and leakage rate based on required gasket stress and flange surface roughness. The idea and implementation of the fuzzy decision support system is based on the compositional rules of inference and can be applied to other areas of gasketed bolted flanged joints to automate the selection of proper parameters which can best characterise the joint sealing performance and provide the required tightness.     

垫片密封设计的工程方法

迄今为止,螺栓法兰连接的设计都是为强度为依据的,并没有考虑连接是否紧密,本提出了表征垫片高温性能的基本方程和垫片密封性能实验数据的修正方法,在考虑工况,介质特性对连接性能影响的基础上,建立了基于最大允许泄漏率的垫片密封连接设计方法。     

一种机油冷却器加强垫圈夹持器的设计

介绍了一种汽车机油冷却器的组成及工作原理,分析了加强垫圈的特点和作用,提出了在自动组片过程中加强垫圈自动抓取的方法。根据提出的方法阐述了采用真空泵驱动夹持器实现抓取的工作原理,设计了加强垫圈夹持器的相关结构并进行了相关的计算分析。     

密封螺柱垫片的工艺试验

密封螺柱垫片是一个简单的部件,但其在液压泵中十分重要.在新产品的开发中,需要多项工艺来推动研制进度.     

柔性石墨波齿复合垫片的常温性能研究

本论述分析了波齿复合垫片的常温力学性能和密封性能试验研究。研究表明,波齿复合垫片具有良好的压缩回弹性能和密封性能;在试验的基础上得出了密封试验曲线及其关系方程式,可作为该种垫片密封设计的重要依据;因石墨纸与金属波齿的结合是采用粘贴方式,波谷内未能充实柔性石墨,因此反映出垫片初始压紧阶段的承载能力低,故建议垫片出厂前应进行预压缩。     

垫片密封的可靠性分析方法

提出了垫片密封系统可靠性的基本概念,从反应论模型出发,依据干涉模型的基本原理,导得了系统可靠度的计算公式,采用解析法和Monte Carlo法进行可靠性分析,探讨了根据所要求的可靠度进行垫片密封设计的方法。