旋塞阀作为沥青用阀的优点

根据炭素生产中沥青用阀必须具备耐高温、耐磨损、对粘性物料有很好密封能力的特点,阀门结构中不能存在空腔死区,不采用金属硬密封,而采用软密封时,密封材料应能尽可能地适应高温。在炭素工业实践中,闸阀、球阀作为沥青阀有着无法克服的缺陷。而旋塞阀以突出特点在与沥青相近工艺条件下的成功应用,证明其是一种非常完善的炭素沥青阀。     

基于图像匹配的变压器套管工况识别方法研究

针对变压器套管工况识别难度大的实际,提出了基于图像匹配的变压器套管工况识别方法。首先,采用基于Guided滤波的Retinex图像增强算法对现场采集的变压器套管图像进行了预处理,然后采用基于改进的SIFT特征匹配算法对待测图像进行精确定位,利用基于最大熵阈值法（OET）图像分割方法提取了套管的边缘。最后,设计了识别器,进行了运行工况识别,给出了结果和分析,并将该方法应用于工程领域,体现了较高的实用价值。     

等壁厚螺杆钻具橡胶衬套设计分析和试验

等壁厚螺杆钻具橡胶衬套在受力受压情况下,其衬套材料的形态变化小,密封间隙小,单位长度下提供扭矩大,散热性能好,本文进一步改进成套式螺杆钻具橡胶衬套结构设计方案,将整体加工改为分层加工,既可以降低加工难度,也可以进一步提高等壁厚螺杆钻具性能.     

柴油机连杆衬套微动疲劳裂纹萌生位置预测方法研究

针对过盈配合的连杆小头和衬套之间存在的微动疲劳现象,建立连杆有限元模型,用ANSYS软件对其进行微动疲劳仿真,提取并分析连杆-衬套接触区上的应力、位移数据,分别用RUIZ综合参数法、MSR临界面法、基于损伤力学的热力学耗散势函数法预测衬套微动裂纹萌生位置。结果表明,3种方法预测的裂纹萌生位置保持一致,即衬套接触边缘内侧最易萌生微动裂纹。用方足桥-试件模拟件进行微动疲劳实验验证。结果表明,3种方法预测位置与实验试件断裂位置保持一致,其中基于热力学势函数法预测结果最为准确。     

主变压器套管过热缺陷处理效果的验证方法

针对一起220kV主变压器110kV套管过热缺陷,在初次处理运行一个多月后,再次出现过热问题,提出了通过测量相关部位的直流电阻和回路电阻来进行验证发热部位和判断过热处理效果的方法。     

Torsional stiffness modeling and optimization of the rubber torsion bushing for a light tracked vehicle

Taking the rubber torsion bushing of a certain type of all-terrain tracked vehicle as the research object, a theoretical model of torsional stiffness was proposed according to the non-linear characteristics of rubber components and structural feature of the suspension. Simulations were carried out under different working conditions to obtain root mean square of vertical weighted acceleration as the evaluation index for ride performance of the all-terrain tracked vehicle, with a dynamics model of the whole vehicle based on the theoretical model of the torsional stiffness and standard road roughness as excitation input. Response surface method was used to establish the parametric optimization model of the torsional stiffness. The evaluation index showed that ride performance of the vehicle with optimized torsional stiffness model of suspension was improved compared with previous model from experiment. The torsional stiffness model of rubber bushing provided a theoretical basis for the design of the rubber torsion bushing in light tracked vehicles.     

剖分式滑动轴承的修复

从剖分式滑动轴承即轴瓦的适用性和特点人手,介绍修理滑动轴承轴瓦的一种简明直观的方法.     

1100kV交流特高压变压器套管的研制

介绍了1100kV交流特高压变压器套管的研制过程。主绝缘设计采用分段等厚度、不等电容及层间绝缘裕度尽可能均匀的电容分压原理。电容芯子卷纸长度9 842 mm,极板层数190层。下瓷套长1700mm,下瓷套处的轴向屏蔽以充分利用套管下端内外绝缘轴向有效绝缘长度原则进行选取;密封结构方面,采用强力弹簧压紧、螺栓螺母紧固、弹性板配合、局部径向定位及弹性韧性良好的橡胶密封垫等组合整体密封结构设计;电容芯子卷电缆纸后较粗,采用硬质黄铜拉制的中心导电管和零层铜管紧固组装成整体导电管结构,上、下瓷套皆采用高强度电瓷配方制造,法兰上端圈和安装法兰盘之间又有辅助机械加强结构,套管抗弯耐受负荷裕度大于5,抗震安全系数1.96。电缆纸采用进口优质芬兰纸;其他相关金属零部件如油枕、胶装法兰、底座、导电管等皆采用隔磁铜质或铝质材料。与国外同类产品对比结果表明,研制的1100kV特高压变压器套管技术性能可靠,能够满足我国特高压输变电工程线路的使用。     

水暖施工中常见问题简述

分析了水暖工程施工质量的重要性,对给排水与暖卫工程在施工过程中经常遇到的质量问题进行了概括和总结,主要涉及洞口的预留问题、工程的主材问题、管线的铺设问题等,从而使水暖工程的质量得到保证。     

Application of the Finite Element Method in the Glass Fiber Bushing Research

Design and optimization of bushing at present mainly use the traditional experience method.The relevant research that adopts computer simulation to carry on the operation behavior of the bushing has appeared in recent years.How to use the finite element method to research bushing was introduced in the article.Physics fields and many relevant parameters of one real bushing were calculated.Through the results of calculation,it indicate that the finite element method is very useful in bushing research of designing and optimizing.