1) Non-constant pressure
变压差
1.
Non-constant pressure steady flow measurement technology has been used to test the airflow performance of 6135 diesel engine inlet ports.
根据发动机气道流动特性,应用变压差技术测量了6135型柴油机缸盖进气道的流动特性。
2.
The non-constant pressure steady flow measurement technology has the same test precision as constant pressure and simpler ope.
为测量发动机气道的流动特性,提出了气道的变压差试验方法。
2) modified temperature and pressure
变温压差
1.
Review on explosion puffing drying by modified temperature and pressure for Hami-melon;
哈密瓜变温压差膨化干燥技术研究进展
2.
A central composite rotatable design (CCRD) was adopted to optimize the technology of explosion puffing drying at modified temperature and pressure for potatoes and the effect of water content after puffing temperature (X1), vacuum drying temperature(X2) and vacuum drying time(X3) on the water content after puffing(Y1), crispness(Y2), and color (Y3) were analyzed.
采用三因子二次回归正交旋转组合设计,对马铃薯变温压差膨化干燥工艺进行了优化研究。
3.
Using the technology of explosion puffing drying for Hami-melon at modified temperature and pressure, the effect of water content after pre-drying, puffing temperature, vacuum drying temperature and time, residence time and preesure difference on degree of water content after puffing, crispness, bulk density and color were analyzed.
采用变温压差膨化干燥技术,探讨预干燥后水分含量、膨化温度、抽空温度、抽空时间、停滞时间和压力差等因素对哈密瓜脆片产品的水分含量、脆度、膨化度和色泽的影响。
3) variable temperature and pressure difference
变温压差
1.
Review on explosion puffing drying for fruits and vegetables at variable temperature and pressure difference;
果蔬变温压差膨化干燥技术研究进展
2.
Optimization of explosion puff drying process for citrus at variable temperature and pressure difference;
柑橘变温压差膨化干燥工艺优化研究
3.
As a method of drying,the explosion puffing drying at variable temperature and pressure difference is a new technology.
变温压差膨化干燥是一种新型的果蔬干燥技术,在胡萝卜加工中的应用还处于起步阶段。
5) differential pressure transmitter
差压变送器
1.
EJA differential pressure transmitter was applied to measurement of lance position in stead of magnetostriction position transmitter.
云南锡业公司澳斯麦特炉喷枪位置的测量采用磁致伸缩式位置变送器,本文介绍了该变送器测量方法和原理,对存在的问题提出了具体的解决方法,利用EJA差压变送器替代了原来的磁致伸缩式位置变送器测量喷枪的位置,并说明了具体的实施方案,通过实践证明方法简单、可靠,解决了生产中的难题,取得满意的效果。
2.
Presents the working principles of differential pressure transmitter as well as its failure diagnosis and analysis,and lists several typical failures of the transmitter in melamine production in Henan Zhongyuan Dahua Group Co.
介绍了差压变送器的工作原理,分析应用中经常出现的典型故障及其原因,提出防范措施。
3.
Presents the principles and application of differential pressure transmitter.
从日常维护出发,介绍差压变送器的原理常见故障及处理方法,为尽快找出问题根源,提高维护质量,稳定生产提供帮助。
6) pressure transmitter
差压变送器
1.
A method for calculating the slurry concentration inside the reactor was developed in this paper through determining the slurry density of polypropylene with double - flange pressure transmitter.
论述了通过双法兰差压变送器测定聚丙烯浆液密度,从而求出聚合反应釜中浆液浓度的方法,并进一步讨论了浆液浓度与平均停留时间、料位和聚合量等工艺参数之间的关系。
2.
Airflow online measurement,which used dynamic pressure mean pipe combined difference pressure transmitter,is presented.
介绍了配合使用动压平均管与差压变送器在线测量风量的方法,本方法适用于不具备直管段要求且气流不稳定的实时流量检测,应用本检测方法有效解决了机车运行中牵引电机冷却通风量的动态测量。
补充资料:变压器差动保护系统调试
变压器差动保护系统调试
commissioning of the differ- ential protection system for transformer
b ianyaqi chadong baohu xitong tiaoshi变压器睡动保护系统调试(eommissioningof the differential Proteetion system for trans-former)对流入变压器和自变压器流出的两侧电流,经电流互感器检测变换之后进行比较,其电流差值反映出变压器的内部故障情况.根据这一原理,由电流互感器、差动继电器、断路器跳闸机构组成的保护系统称为变压器差动保护系统.当电流互感器的变比和结线方式与被保护的变压器相适应时,变压器正常运行电流及变压器以外的穿越性故障电流不会使差动保护动作.空载变压器接入电源时,电源侧向变压器流入较大的励磁涌流,为减少它对保护系统的影响,消除误动作,变压器差动保护系统中设有速饱和变流器或谐波制动电路。变压器差动保护系统的调试分差动保护继电器的单体调试和差动保护系统模拟试验两个步骤. 差动保护继电器的单体调试变压器差动保护继电器依其结构特点可分为机电型、整流型、静态型等。机电型差动保护继电器由速饱和变流器、电磁动作的执行继电器、换档擂接板等组成,其调试项目主要有:(1)外观检查,插接与机械动作部分的检查和调整。(2)电磁式执行继电器的常规调试。(3)速饱和变流器的特性试验:检查各绕组极性与结线的正确性;测定变流器伏安特性曲线;通入试验电流,测定执行继电器动作时各绕组分档的动作电流安匝数,并将其整定到设计规定的范围内;测定直流助磁特性,即测定相对动作电流。=(‘/i。)和偏移系数K(1/1)间的函数关系。式中,I为速饱和变流器一次侧通入的直流试验电流(A)八为通入直流分量I时速饱和变流器一次侧的交流动作电流(A);i。为未通直流分量时的交流动作电流(A)。(4)在整定位置下测定保护继电器的整组伏安特性,即差动继电器输入差动电流信号安匝数与执行继电器线圈端电压之间的关系,以判别差动继电器工作磁通密度选取是否合适。 整流型差动保护继电器由差动元件和瞬动元件两部分组成。差动元件包括工作回路、比率制动回路、谐波制动回路及直流比较回路。调试项目主要有:(l)工作回路最小动作电流与返回电流的测定,动作电流整定。(2)比率制动回路动作特性试验。给工作回路和制动回路同时通入试验电流,测定继电器产生输出动作时两试验电流数,绘制出它们的函数关系曲线(即比率动作特性曲线),按照保护设计要求对比率动作特性进行整定。在无特殊要求时,两试验电流取同相位电流。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条