1)  sealing technology
密闭技术
1.
According to an investigation report,three kinds of sealing technology are being used to dust removal equipment in plants and mines of Anshan Mining Company:portioned sealing,complete sealing and overall sealing.
采用单项集优的方法对鞍山矿业公司各厂矿防尘设施的密闭技术进行调查, 该公司防尘密闭罩有局部密闭、整体密闭和大密闭3种。
2)  sealing
密闭
1.
A new inflatable device based on the automatic control principle of pressure was developed to overcome shortcomings in traditional sealing technologies and to meet the needs of sealing fire areas safely.
66 m2的非规则粗糙壁面巷道,气囊自动充气封闭的时间仅为12~13 min,比常规密闭的施工时间短;采用褶皱和裙边结构,气囊漏风率仅为5%左右,具有良好的封闭效果。
3)  airtight
密闭
1.
Simply Analysing the Requirement of the Air-cooling Airtight System for the Function of Complementing Water;
浅议空冷式密闭系统对补水功能的要求
2.
According to the actual situation,using the following methods such as airtight dust,automatical adding water,machinery dust removal,high-pressure static electricity,wet cleaning,etc.
文章介绍了包钢选矿厂在矿石的翻车、运输、破碎、筛分过程中产生的粉尘对人、环境、设备的危害进行了分析,并根据包钢选矿厂产尘的实际情况,治理粉尘污染所采用的密闭除尘、自动加水除尘、机械抽风除尘、高压静电除尘、湿法清扫等方法收到的显著效果。
4)  closed
密闭
1.
Combination of well testing and logging tech makes true of closed injection profile well logging which changes former wire line logging that needs giving out over-fall first and then conducting operation to avoid surface pollution that acquires true data on normal water in- jection situation and saves manpower and material resources.
试井技术与测井技术相结合可实现高压注水井密闭吸水剖面测井。
2.
Such as compound initiation system, feeding water successively in course of reaction, reducing step- down time in later time of reaction, new type anti- sticking agent, adding material in closed condition, crude material monitoring and DCS computer automatic control technology.
通过采用复合引发体系、反应中间连续注水、反应后期缩短降压时间、新型防黏釜剂、密闭入料、粗料监测及DCS计算机自控技术等使聚合釜的生产能力由0。
5)  seal
密闭
1.
Selecting the sealing position for stope face after mining;
回采工作面采后密闭位置的选择
2.
The Research on New-style Seal-filling Hydrogel for Mine;
矿井用新型水凝胶密闭填充材料的研究
3.
Making use of the advantage time in low temperature in winter and spring,using method of mechanical yen- tilation for bulk wheat in the large storehouse to descend grain temperature,thereafter,sealing the grain bulks, heat insulating to prevent pest.
利用冬春季节气温较低的有利时机,对高大平房仓散装小麦进行机械通风,将粮食降到较低温度,然后对粮堆进行密闭,隔热防虫。
6)  sealed coring
密闭取心
1.
Influencing factors and correction method for error of fluid saturation calculation during sealed coring;
密闭取心流体饱和度误差的影响因素及修正方法
2.
Based on the sealed coring, and combined with logging interpretation and numerical simulation, the water flooded characteristics of oil layer, and remaining oil distribution can be studied, the inherent relation of water flooded characteristic and interlayer, internal and plane heterogeneous characteristic, water flooded characteristic and fluid can be revealed.
通过密闭取心方式,结合测井解释和数值模拟,研究油层水淹特征及剩余油分布,揭示水淹特征与油层层间、层内和平面非均质以及流体的内在联系,是不同阶段开发调整及提高采出程度的基础或关键技术。
3.
Using the principle of data statistics and regressive formula as well as the calculating method by rock pyrolysis, the cores by sealed coring and sidewall coring in two wells are compared in Xingshugang Oilfield.
应用数理统计、回归方程原理和岩石热解计算饱和度方法,通过对杏树岗油田2口密闭取心井的岩心与井壁取心分析资料进行对比,介绍了应用密闭取心分析资料对井壁取心分析资料进行2步校正并求取剩余油饱和度的方法,求得了杏树岗油田有效层和表外层的剩余油饱和度计算公式。
参考词条
补充资料:RP技术和基于RP技术的RT技术

摘要:介绍了快速成形技术的原理和几种典型成形方法。同时,还介绍了基于快速成形技术的快速模具技术在模具制造业中的应用,以及快速成形技术的现状和发展趋势。
    关键词:快速成形;快速模具;直接快速制模;间接快速制模。


引言
    快速成形(Rapid Prototyping , RP.)技术,也叫快速原型技术,20世纪80年代后期起源于美国。该技术是一种集计算机辅助设计、机械、数控、检测、激光技术和材料学等为一体的先进制造技术。传统的制造方法是基于材料去除的概念,而 RP 技术突破了这种工艺方法,它是一种“使材料生长”的制造过程,是一种全新的制造技术,所以被誉为是近20年来制造技术领域的一项重大突破。


RP技术
    1、原理
    RP 技术是基于离散/堆积的原理。在计算机的控制下快速成型机的成形头选择性地固化一层层的液体材料(或选择性的切割一层层的纸、烧结一层层的粉末材料、喷涂一层层的热熔性材料等),形成各个截面轮廓并逐步顺序叠加成三维工件实体。其工艺步骤为:
    (1)切片  把三维CAD模型转化为快速原型系统能够接受的数据格式,运用切片软件将模型切成一系列指定厚度的薄片。
    (2)扫描  通过数控装置控制激光或其他作业装置,在当前工作层上扫描出切片的截面形状。
    (3)进给  把工作台沿着某一方向下降每次成形厚度那样一个距离。重复上一步骤和本步骤,直到工件完全成形。
    (4)后处理  根据不同应用场合的需要,分别对零件进行后固化、上漆、烧结、渗铜等处理。
    2、类型
    目前RP的方法有几十种,但商品化较好的主要有:光固化立体成形(Stereo Lithogra- phy Apparatus, SLA)、分层实体制造(Laminated Objected Manufacturing ,LOM)、选择性激光烧结(Selected Laser Sintering , SLS)、熔融沉积造型(Fused Deposition Modeling , FDM)、三维印刷(Three Dimensional Printing , TDP)等。另外,很有潜力的激光气相沉积(Laser Vapor Deposition , LVP)法正在试验之中。
    (1)SLA  SLA法是出现最早,技术最成熟和应用最广泛的RP 技术,由美国的3D Systems 公司推出。SLA法是用激光束按照截面轮廓的形状,沿液态光敏树脂的表面进行扫描来固化光敏树脂,从而成形工件。工件的表面质量较好,尺寸精度较高(相对于其他RP 方法),可确保工件的尺寸精度在0.1mm以内,但树脂会因吸收空气中的水分而收缩、弯曲、卷翘,产生应力,适合成形中小型工件。

说明:补充资料仅用于学习参考,请勿用于其它任何用途。