Ak series intelligent pressure transmitter which is universal intelligent series transmitter , it introduced advanced production technology from america and japan adopts the world leading technique , pass through strict quality control . this kind of transmitter is searched and developed independently by our company that is pressure detect transmit unit in the industrial automation control system . it measures fluid pressure in the industry process and converts it into 420 ma dc signal output ; at the same time , it may be remote parameter setup , remote control , self - diagnosis by field hart protocol 是引进美国和日本的先进生产工艺,采用世界领先技术,经过严格的品质管理,由我公司自行研制和开发的通用智能型系列变送器,是工业自动化控制系统的压力检测变送单元,它测量工业过程流体压力,将其转化成4ma 20ma dc信号输出,同时通过现场hart协议可进行远程参数设定远程控制自诊断等功能。
Thirdly , cbt ' s characteristic of the strain v . s . the applied pressure is studied , on the basis of this , a new scheme of the straight bourdon tube ( sbt ) is presented , a sbt is designed and fabricated , and then the strain - pressure characteristics of both the cbt and sbt are measured experimentally using a strain measuring technique , a comparison between the cbt ' s and sbt ' s strain characteristics is also made . finally , theoretical models of a fbg fluid pressure sensing system scheme based on the bourdon tube are developed , and a fbg - based fluid pressure sensing system using the transverse strain - pressure characteristic of the sbt is designed and set up 首先,详细介绍了fbg的基本光学传感特性,并测量了fbg的温度、应变特性;其次,研究了c型弹簧管的位移?压力特性,并利用ccd成像和计算机图像处理技术对其进行了非接触测量;再次,研究了c型弹簧管的应变?压力特性,在此基础上提出直弹簧管的设计方案,并制作了直弹簧管,采用应变测量技术对c型弹簧管和直弹簧管的应变?压力特性分别进行了测量,对两者的应变特性做了比较;最后,建立了基于弹簧管的fbg压力传感系统理论模型,设计完成了基于直弹簧管横向应变?压力特性的fbg流体压力传感系统。
Air piston pump adopts the theory that " pressure " applying force on various areas and can produce various " acting force " , the pump takes the origin that the compressed air is compressed energy , and transforms the pressure of compressed air into more fluid pressure , pressing fluid move in order to achieve the aim of high viscosity and ultra - viscosity fluid 气动柱塞泵是利用“压力”在不同的面积上施力,产生不同“作用压力”的原理,以压缩空气为压力能量的来源,将压缩空气的压力转换成更大的流体压力,压迫流体移动,进而达到输送高黏度及超高黏度流体的目的。
In pumping fluid with gas , pressure boost can be improved by enhancing the pump rotation speed , thereby improving the performance of the pump to a certain degree ; when the gas content is constant , by increasing the inlet pressure , the pressure boost can be enhanced and the pump efficiency be improved remarkably ; when the gas content is rather high , there will be a problem of matching between the gas pressure and the fluid pressure ; the performance of the multiphase pump can also be improved by means of rational design of buffer vessel and homogenizer 试验分析认为,气液混输工况下,提高泵转速可以提高增压,在一定程度上能改善多相泵的工作性能;含气率一定时,增加进口压力,可使多相泵增压值增大,泵效明显增加,最大含气率点后移,但含气率很高时,存在气液压力相匹配问题;改进缓冲罐和均化器的设计,有利于气液互相夹带,避免气囊产生,可改善多相泵的输送性能。
Base on the kinematics relation of ctp , the corresponding reynolds equation or average reynolds equation , fluid film thickness equation under qusi - stable state in polar coordinates , balance equations of load and moments under full - film contact and partial - film contact states were set up respectively . these model equations were calculated by the finite difference method , and the instantaneous 3 - d distribution of fluid pressure and the slurry film was simulated by the matlab software 根据ctp的运动关系,分别建立了极坐标下,全膜接触工况时的非稳态牛顿流体在ctp过程中的一般reynolds方程、流体膜厚方程、载荷平衡方程和转矩平衡方程,以及部分膜接触工况下的平均reynolds方程、平均膜厚方程、接触压力方程、总载荷平衡方程和总转矩平衡方程。