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[灌水]工业热电偶的结构

2008-8-13 22:21:25  2587
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<p class="MsoNormal"><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">工业</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><a href="http://www.bjzyhs.com/"><span lang="EN-US" style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><span lang="EN-US">热电偶</span></span></a></span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">的结构</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">一、结构</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span></span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">工业用</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><a href="http://www.bjzyhs.com/"><span lang="EN-US" style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><span lang="EN-US">热电偶</span></span></a></span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">是要进行封装保护的处理的,普通型工业用</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><a href="http://www.bjzyhs.com/"><span lang="EN-US" style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><span lang="EN-US">热电偶</span></span></a></span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">的封装形式如图</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt">6-5</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">所示。主要有热电极(</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><a href="http://www.bjzyhs.com/"><span lang="EN-US" style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><span lang="EN-US">热电偶</span></span></a></span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">电极),绝缘材料,保护套管和接线盒等组成。为了便于安装,在保护套管上一般还设有安装法兰盘。</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">二、常用</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><a href="http://www.bjzyhs.com/"><span lang="EN-US" style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><span lang="EN-US">热电偶</span></span></a><o:p></o:p></span></p>
<p class="MsoNormal" style="TEXT-INDENT: 21.75pt"><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">可以根据测温范围将</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><a href="http://www.bjzyhs.com/"><span lang="EN-US" style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><span lang="EN-US">热电偶</span></span></a></span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">分为高温型和常温型两大类;也可以根据组成热电偶的材料将热电偶分为普通金属热电偶和贵金属热电偶两大类。一般情况下,高温型热电偶大多是由贵金属材料构成的。同时贵金属热电偶的性能比较稳定,常常用来作为基准来使用。而普通金属热电偶虽然温差电系数比较大,但由于存在高温氧化等原因,测温范围一般都比较小。如康铜</span><span style="COLOR: black; mso-bidi-font-size: 10.5pt"> </span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">——</span><span style="COLOR: black; mso-bidi-font-size: 10.5pt"> </span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">铜热电偶的一次项温差电系数可达</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt">40.865</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">×</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt">10-6V/</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">℃,但由于二次项温差电系数达</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt">7.66</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">×</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt">10-8V/</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">℃,切与一次项的温差电系数符号相反,所以当测温范围超过</span><?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:chmetcnv w:st="on" unitname="℃" sourcevalue="533.5" hasspace="False" negative="False" numbertype="1" tcsc="0"><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt">533.5</span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">℃</span></st1:chmetcnv><span style="COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">后,热电势便不再是温度的单值函数了。</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt"><o:p>&nbsp;</o:p></span></p><span style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-bidi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 1.0pt; mso-hansi-font-family: 'Times New="New"  Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">来源:</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 'Times New="New"  Roman'; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><a href="http://www.bjzyhs.com/"><span lang="EN-US" style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><span lang="EN-US">热电阻</span></span></a> <a href="http://www.bjzyhs.com/"><span lang="EN-US" style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><span lang="EN-US">热电偶</span></span></a><span style="mso-spacerun: yes">&nbsp; </span><a href="http://www.bjzyhs.com/"><span lang="EN-US" style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><span lang="EN-US">温度传感器</span></span><span lang="EN-US" style="COLOR: black"><span lang="EN-US"> </span></span></a><a href="http://www.bjzyhs.com/sjswdj.asp"><span lang="EN-US" style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><span lang="EN-US">双金属温度计</span></span></a><span style="mso-spacerun: yes">&nbsp; </span><a href="http://www.bjzyhs.com/jlkb.asp"><span lang="EN-US" style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><span lang="EN-US">节流孔板</span></span></a> </span><span style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-bidi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 1.0pt; mso-hansi-font-family: 'Times New="New"  Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">专业服务网</span>
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