?!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> ˵Ӷ LF50 涡街流量?_ 威尔沃自动化设备(北京)有限公司 - 中国计量测控? - Ʊappַ
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    <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">LF50</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">系列新型涡街流量计源自于流体的卡门现象。流量仪表内置有一个分水杆,涡流从分水杆开始在其下游形成俩部分,其中一部分顺时针旋转,另一部分逆时针方向旋转。其一次只产生一个涡流,俩边交替产生。这种交替的信号通过变送电路即可测得涡流的速率?lt;/span><span lang="EN-US"><font face="Times New Roman">LF50</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">内置的传感器集成了一个压电元件来检测涡流的频率?lt;/span></font></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">原理?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">涡街流量计是利用卡门涡街原理进行流量测量的。在测量管中垂直插入一个柱状物时,流体通过柱状物两侧就自然交替地产生有规则的旋涡,这种旋涡列被称为卡门涡街,在</span><span lang="EN-US"><font face="Times New Roman">d/D=0.281</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时,释放的旋涡最稳定?lt;/span><span lang="EN-US"><font face="Times New Roman">D</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为管道直径)。卡门涡街的释放频率与流体速度及柱状物的宽度有关?lt;/span></font></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">参数?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">介质?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">液体、气体、蒸?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">量程范围?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">气:</span><span lang="EN-US"><font face="Times New Roman">0<st1:chmetcnv w:st="on" unitname="m" sourcevalue="10" hasspace="False" negative="True" numbertype="1" tcsc="0">-10m</st1:chmetcnv>/s<span style="mso-spacerun: yes">&nbsp; </span></font></span></font></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">液:</span><span lang="EN-US"><font face="Times New Roman">0<st1:chmetcnv w:st="on" unitname="m" sourcevalue="70" hasspace="False" negative="True" numbertype="1" tcsc="0">-70m</st1:chmetcnv>/s</font></span></font></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">蒸汽?lt;/span><span lang="EN-US"><font face="Times New Roman">0<st1:chmetcnv w:st="on" unitname="m" sourcevalue="70" hasspace="False" negative="True" numbertype="1" tcsc="0">-70m</st1:chmetcnv>/s</font></span></font></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">工作温度?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="3"><st1:chmetcnv w:st="on" unitname="?quot; sourcevalue="40" hasspace="False" negative="True" numbertype="1" tcsc="0"><span lang="EN-US"><font face="Times New Roman">-40</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">?lt;/span></st1:chmetcnv><span lang="EN-US"><font face="Times New Roman"> - </font><st1:chmetcnv w:st="on" unitname="?quot; sourcevalue="450" hasspace="False" negative="False" numbertype="1" tcsc="0"><font face="Times New Roman">450</font><span lang="EN-US" style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">?lt;/span></span></st1:chmetcnv></span></font></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">环境温度?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="3"><st1:chmetcnv w:st="on" unitname="?quot; sourcevalue="40" hasspace="False" negative="True" numbertype="1" tcsc="0"><span lang="EN-US"><font face="Times New Roman">-40</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">?lt;/span></st1:chmetcnv><span lang="EN-US"><font face="Times New Roman"> - </font><st1:chmetcnv w:st="on" unitname="?quot; sourcevalue="85" hasspace="False" negative="False" numbertype="1" tcsc="0"><font face="Times New Roman">85</font><span lang="EN-US" style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">?lt;/span></span></st1:chmetcnv></span></font></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">操作压力?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span lang="EN-US"><font face="Times New Roman" size="3">4MPa</font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">精度?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span lang="EN-US"><font face="Times New Roman" size="3">1%</font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">电源?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span lang="EN-US"><font face="Times New Roman" size="3">24VDC</font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">功耗:</font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span lang="EN-US"><font face="Times New Roman" size="3">5W</font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">输出?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">4-20mA</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">?lt;/span><span lang="EN-US"><font face="Times New Roman">Modbus</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">?lt;/span><span lang="EN-US"><font face="Times New Roman">HART</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">可?lt;/span></font></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">材质?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">测量管:</span><span lang="EN-US"><font face="Times New Roman">0Cr18Ni9</font></span></font></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">涡流发生体:</span><st1:chmetcnv w:st="on" unitname="l" sourcevalue="316" hasspace="False" negative="False" numbertype="1" tcsc="0"><span lang="EN-US"><font face="Times New Roman">316L</font></span></st1:chmetcnv></font></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">法兰:碳钢、不锈钢可?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">结构形式?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">夹持式和法兰式,大口径选用插入?lt;/font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">量程比:</font></span></p> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span lang="EN-US"><font face="Times New Roman" size="3">10:1<span style="mso-spacerun: yes">&nbsp; </span>~ 30:1</font></span></p> <p>&nbsp;</p>

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