压力与衬垫的选择.htm

该资料时关于EMC的相关问题

    </span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    "Times New Roman";mso-hansi-font-family:"Times New Roman"'>比较所选用的衬垫：</span><span
    lang=EN-US style='font-size:9.0pt'><br>
    </span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    "Times New Roman";mso-hansi-font-family:"Times New Roman"'>　</span><span
    lang=EN-US style='font-size:9.0pt'>* </span><span style='font-size:9.0pt;
    font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
    "Times New Roman"'>包在矩形开放孔尿烷泡沫（</span><span lang=EN-US style='font-size:
    9.0pt'>UFC</span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    "Times New Roman";mso-hansi-font-family:"Times New Roman"'>）矩形芯上的导电布衬垫，</span><span
    lang=EN-US style='font-size:9.0pt'> 0.375</span><span style='font-size:
    9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
    "Times New Roman"'>英寸</span><span lang=EN-US style='font-size:9.0pt'>/0.500</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
    mso-hansi-font-family:"Times New Roman"'>英寸</span><span lang=EN-US
    style='font-size:9.0pt'> (</span><span style='font-size:9.0pt;font-family:
    宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>图</span><span
    lang=EN-US style='font-size:9.0pt'>1A</span><span style='font-size:9.0pt;
    font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
    "Times New Roman"'>示</span><span lang=EN-US style='font-size:9.0pt'>)<br>
    </span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    "Times New Roman";mso-hansi-font-family:"Times New Roman"'>　</span><span
    lang=EN-US style='font-size:9.0pt'>* </span><span style='font-size:9.0pt;
    font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
    "Times New Roman"'>铍铜指形簧片</span><span lang=EN-US style='font-size:9.0pt'>
    (BCF) </span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    "Times New Roman";mso-hansi-font-family:"Times New Roman"'>，高：</span><span
    lang=EN-US style='font-size:9.0pt'>0.40</span><span style='font-size:9.0pt;
    font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
    "Times New Roman"'>英寸</span><span style='font-size:9.0pt'> </span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
    mso-hansi-font-family:"Times New Roman"'>厚：</span><span lang=EN-US
    style='font-size:9.0pt'>0.004</span><span style='font-size:9.0pt;
    font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
    "Times New Roman"'>英寸</span><span lang=EN-US style='font-size:9.0pt'> (</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
    mso-hansi-font-family:"Times New Roman"'>图</span><span lang=EN-US
    style='font-size:9.0pt'>1B</span><span style='font-size:9.0pt;font-family:
    宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>示</span><span
    lang=EN-US style='font-size:9.0pt'>)<br>
    </span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    "Times New Roman";mso-hansi-font-family:"Times New Roman"'>　</span><span
    lang=EN-US style='font-size:9.0pt'>* </span><span style='font-size:9.0pt;
    font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
    "Times New Roman"'>包在硅橡胶管状芯上的蒙乃尔丝网（</span><span lang=EN-US
    style='font-size:9.0pt'>SET</span><span style='font-size:9.0pt;font-family:
    宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>），直径</span><span
    style='font-size:9.0pt'> </span><span style='font-size:9.0pt;font-family:
    宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>：</span><span
    lang=EN-US style='font-size:9.0pt'>0.348</span><span style='font-size:9.0pt;
    font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
    "Times New Roman"'>英寸</span><span lang=EN-US style='font-size:9.0pt'> (</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
    mso-hansi-font-family:"Times New Roman"'>图</span><span lang=EN-US
    style='font-size:9.0pt'>1C</span><span style='font-size:9.0pt;font-family:
    宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>示</span><span
    lang=EN-US style='font-size:9.0pt'>)<br>
    </span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    "Times New Roman";mso-hansi-font-family:"Times New Roman"'>　</span><span
    lang=EN-US style='font-size:9.0pt'>* </span><span style='font-size:9.0pt;
    font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
    "Times New Roman"'>包在氯丁发泡橡胶芯上的蒙乃尔丝网（</span><span lang=EN-US
    style='font-size:9.0pt'>NSP</span><span style='font-size:9.0pt;font-family:
    宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>），直径：</span><span
    lang=EN-US style='font-size:9.0pt'>0.348</span><span style='font-size:9.0pt;
    font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
    "Times New Roman"'>英寸</span><span lang=EN-US style='font-size:9.0pt'> (</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
    mso-hansi-font-family:"Times New Roman"'>图</span><span lang=EN-US
    style='font-size:9.0pt'>1D</span><span style='font-size:9.0pt;font-family:
    宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>示</span><span
    lang=EN-US style='font-size:9.0pt'>)<br>
    </span><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
    "Times New Roman";mso-hansi-font-family:"Times New Roman"'>　</span><span
    lang=EN-US style='font-size:9.0pt'>* </span><span style='font-size:9.0pt;
    font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
    "Times New Roman"'>填充镍</span><span lang=EN-US style='font-size:9.0pt'>/</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
    mso-hansi-font-family:"Times New Roman"'>石墨材料的</span><span lang=EN-US
    style='font-size:9.0pt'>D</span><span style='font-size:9.0pt;font-family:
    宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>形橡胶条</span><span
    style='font-size:9.0pt'> </span><span style='font-size:9.0pt;font-family:
    宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>（</span><span
    lang=EN-US style='font-size:9.0pt'>DET</span><span style='font-size:9.0pt;
    font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
    "Times New Roman"'>）</span><span style='font-size:9.0pt'> </span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
    mso-hansi-font-family:"Times New Roman"'>高：</span><span lang=EN-US
    style='font-size:9.0pt'>0.312</span><span style='font-size:9.0pt;
    font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
    "Times New Roman"'>英寸</span><span lang=EN-US style='font-size:9.0pt'> (</span><span
    style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
    mso-hansi-font-family:"Times New Roman"'>图</span><span lang=EN-US
    style='font-size:9.0pt'>1E</span><span style='font-size:9.0pt;font-family:
    宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>示</span><span
    lang=EN-US style='font-size:9.0pt'>) <o:p></o:p></span></p>
    <p align=center style='text-align:center'><span lang=EN-US><!--[if gte vml 1]><v:shape
     id="_x0000_i1026" type="#_x0000_t75" alt="" style='width:75.75pt;height:225pt'>
     <v:imagedata src="./压力与衬垫的选择.files/image002.jpg" o:href="http://10.15.163.14/contents/TrainingResource/ebook/no4/imgs/Y_T1.jpg"/>
    </v:shape><![endif]--><![if !vml]><img width=101 height=300
    src="./压力与衬垫的选择.files/image002.jpg" border=0
    tppabs="http://www.emcdoc.com.cn/ebook/no4/imgs/Y_T1.jpg" v:shapes="_x0000_i1026"><![endif]><br>
    图1 衬垫种类<o:p></o:p></span></p>
    <p>平均压缩量：<span lang=EN-US><br>
    　　图6表明压力（磅/英尺）与形变（相对于自由高度的百分数）的关系。虽然总体函数关系一致，但描述不同材料特性的斜率Y/X将发生变化。<o:p></o:p></span></p>
    <p align=center style='text-align:center'><span lang=EN-US><!--[if gte vml 1]><v:shape
     id="_x0000_i1027" type="#_x0000_t75" alt="" style='width:300pt;height:220.5pt'>
     <v:imagedata src="./压力与衬垫的选择.files/image003.jpg" o:href="http://10.15.163.14/contents/TrainingResource/ebook/no4/imgs/Y_T2.jpg"/>
    </v:shape><![endif]--><![if !vml]><img width=400 height=294
    src="./压力与衬垫的选择.files/image003.jpg" border=0
    tppabs="http://www.emcdoc.com.cn/ebook/no4/imgs/Y_T2.jpg" v:shapes="_x0000_i1027"><![endif]><br>
    图6 压力与形变的关系<o:p></o:p></span></p>
    <p>　　　　平均压缩量<span lang=EN-US> = 2Y / (X2－X1)，<br>
    　　　　或用形变量磅英尺/%来表示。<br>
    　　以上计算基于衬垫生产商提供的数据。为了评价每种衬垫的推荐压力，对推荐的最大和最小压缩量取了平均值。为了便于比较，数值以形变量的磅英尺/%表示。<br>
    　　表1列出了建议使用的各种衬垫的平均压力。<o:p></o:p></span></p>
    <div align=center>
    <table border=1 cellspacing=0 cellpadding=0 width="90%" style='width:90.0%;
     mso-cellspacing:0cm;mso-padding-alt:0cm 0cm 0cm 0cm'>
     <tr>
      <td width="100%" colspan=3 style='width:100.0%;padding:0cm 0cm 0cm 0cm'>
      <p class=MsoNormal style='line-height:14.0pt'><span style='font-size:
      9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
      "Times New Roman"'>表</span><span lang=EN-US style='font-size:9.0pt'>1 </span><span
      style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
      mso-hansi-font-family:"Times New Roman"'>衬垫在推荐压缩量时所受的压力</span><span
      lang=EN-US style='font-size:9.0pt;font-family:宋体'><o:p></o:p></span></p>
      </td>
     </tr>
     <tr>
      <td width="43%" style='width:43.0%;padding:0cm 0cm 0cm 0cm'>
      <p class=MsoNormal align=center style='text-align:center;line-height:
      14.0pt'><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
      "Times New Roman";mso-hansi-font-family:"Times New Roman"'>类</span><span
      style='font-size:9.0pt'> </span><span style='font-size:9.0pt;font-family:
      宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>型</span><span
      lang=EN-US style='font-size:9.0pt;font-family:宋体'><o:p></o:p></span></p>
      </td>
      <td width="30%" style='width:30.0%;padding:0cm 0cm 0cm 0cm'>
      <p class=MsoNormal align=center style='text-align:center;line-height:
      14.0pt'><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
      "Times New Roman";mso-hansi-font-family:"Times New Roman"'>压力（磅</span><span
      lang=EN-US style='font-size:9.0pt'>/</span><span style='font-size:9.0pt;
      font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
      "Times New Roman"'>英尺）</span><span lang=EN-US style='font-size:9.0pt;
      font-family:宋体'><o:p></o:p></span></p>
      </td>
      <td width="27%" style='width:27.0%;padding:0cm 0cm 0cm 0cm'>
      <p class=MsoNormal align=center style='text-align:center;line-height:
      14.0pt'><span style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:
      "Times New Roman";mso-hansi-font-family:"Times New Roman"'>压缩比（</span><span
      lang=EN-US style='font-size:9.0pt'>%</span><span style='font-size:9.0pt;
      font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
      "Times New Roman"'>）</span><span lang=EN-US style='font-size:9.0pt;
      font-family:宋体'><o:p></o:p></span></p>
      </td>
     </tr>
     <tr>
      <td width="43%" style='width:43.0%;padding:0cm 0cm 0cm 0cm'>
      <p class=MsoNormal style='line-height:14.0pt'><span style='font-size:
      9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
      "Times New Roman"'>导电布</span><span style='font-size:9.0pt'> </span><span
      style='font-size:9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
      mso-hansi-font-family:"Times New Roman"'>开孔尿烷泡沫芯（</span><span lang=EN-US
      style='font-size:9.0pt'>UFC</span><span style='font-size:9.0pt;
      font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
      "Times New Roman"'>）</span><span lang=EN-US style='font-size:9.0pt;
      font-family:宋体'><o:p></o:p></span></p>
      </td>
      <td width="30%" style='width:30.0%;padding:0cm 0cm 0cm 0cm'>
      <p class=MsoNormal align=center style='text-align:center;line-height:
      14.0pt'><span lang=EN-US style='font-size:9.0pt'>4.83</span><span
      lang=EN-US style='font-size:9.0pt;font-family:宋体'><o:p></o:p></span></p>
      </td>
      <td width="27%" style='width:27.0%;padding:0cm 0cm 0cm 0cm'>
      <p class=MsoNormal align=center style='text-align:center;line-height:
      14.0pt'><span lang=EN-US style='font-size:9.0pt'>30</span><span
      lang=EN-US style='font-size:9.0pt;font-family:宋体'><o:p></o:p></span></p>
      </td>
     </tr>
     <tr>
      <td width="43%" style='width:43.0%;padding:0cm 0cm 0cm 0cm'>
      <p class=MsoNormal style='line-height:14.0pt'><span style='font-size:
      9.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
      "Times New Roman"'>铍铜指形簧片</span><span lang=EN-US style='font-size:9.0pt'>
      (BCF)</span><span lang=EN-US style='font-size:9.0pt;font-family:宋体'><o:p></o:p></span></p>
      </td>
      <td width="30%" style='width:30.0%;padding:0cm 0cm 0cm 0cm'>
      <p class=MsoNormal align=center style='text-align:center;line-height:
      14.0pt'><span lang=EN-US style='font-size:9.0pt'>25.00</span><span
      lang=EN-US style='font-size:9.0pt;font-family:宋体'><o:p></o:p></span></p>
      </td>
      <td width="27%" style='width:27.0%;padding:0cm 0cm 0cm 0cm'>
      <p class=MsoNormal align=center style='text-align:center;line-height:
      14.0pt'><span lang=EN-US style='font-size:9.0pt'>30</span><span
      lang=EN-US style='font-size:9.0pt;font-family:宋体'><o:p></o:p></span></p>
      </td>
     </tr>
     <tr>
      <td width="43%" style='width:43.0%;padding:0cm 0cm 0cm 0cm'>
      <p class=MsoNormal style='line-height:14.0pt'><span style='font-size: