系统学习｜风挡加温B737系列机务在线

机务君 发表于 2021-2-16 18:27:22

系统学习｜风挡加温

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         <span style="font-size: 14px;color: rgb(136, 136, 136);">九品机务在这里给大家拜年了！又很久没更新文章了，最近有不少朋友都在投稿、催更，但是最近实在太忙了。媳妇儿生了俩儿子，这一下给我们全家可累坏了，整天都在围着孩子转，忙的不亦乐乎。以后估计写文章的频率会少许多，但我会一直坚持下去的。九品机务，与你们同在......</span>
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   <span style="font-size: 14px;">737NG飞机驾驶舱1、2号风挡具有加温功能（忽略老构型飞机4、5号风挡加温），能够防止飞行过程中风挡结冰，同时增加了风挡的抗冲击强度。</span><span style="font-size: 14px;">（我司</span><span style="font-size: 14px;">大部分NG飞机的</span><span style="font-size: 14px;">风挡加温指示灯均为ON灯，</span><span style="font-size: 14px;">所以本文</span><span style="font-size: 14px;">只针对ON灯构型。</span><span style="font-size: 14px;">）</span>
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               <strong mpa-from-tpl="t">系统部件及功能</strong>
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   <span style="text-align: justify;font-size: 14px;">1、风挡/探头加温面板：风挡加温电门用于风挡加温的开关；风挡加温及过热灯用于指示风挡加温及过热指示；过热/电源测试电门用于对风挡加温、过热功能的测试。</span>
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   <span style="text-align: justify;font-size: 14px;">2、WHCU：用于控制风挡加温电流，同时监控风挡温度，当然还能提供BITE功能。</span>
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   <span style="text-align: justify;font-size: 14px;">3、风挡加温元件：用于对风挡进行加温。</span>
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   <span style="text-align: justify;font-size: 14px;">4、风挡温度传感器：（主备用传感器）感受风挡温度，并将温度信号发送给WHCU。</span>
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               风挡加温<span style="white-space: span-wrap;"></span>
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   <span style="text-align: justify;font-size: 14px;">当把风挡加温电门置于ON位时，风挡加温系统通电，风挡内部有两个温度传感器（主备用），用来感受风挡的温度，传感器将温度信号发送给WHCU，WHCU用以监控风挡温度，如果风挡温度低于100°F (37°C) ，加温电流经过WHCU输送给风挡加温元件开始</span><span style="text-align: justify;font-size: 14px;">给风挡加温，同时点亮风挡加温灯。当风挡温度接近110°F (43°C) 时，WHCU控制减小风挡加温电流，防止超温。</span>
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               过热保护<span style="white-space: span-wrap;"></span>
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   <span style="text-align: justify;font-size: 14px;"><span style="font-size: 14px;">WHCU内部有过热保护电路，当风挡加温系统工作时，如果WHCU探测到风挡温度超过145°F (62°C) 时，将触发过热保护功能。<span style="font-size: 14px;">此时</span>：</span></span>
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   <span style="font-size: 14px;">1、相应的风挡加温系统停止工作；</span>
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   <span style="font-size: 14px;">2、头顶板绿色的风挡加温灯熄灭；</span>
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   <span style="font-size: 14px;">3、头顶板琥珀色的过热灯点亮；</span>
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   <span style="font-size: 14px;">4、遮光板上的MASTER CAUTION灯和ANTI-ICE灯点亮。</span>
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   <span style="text-align: justify;font-size: 14px;"><span style="font-size: 14px;"><br style="font-style: normal;font-variant: normal;font-weight: normal;letter-spacing: normal;line-height: normal;orphans: 2;text-align: -webkit-auto;text-indent: 0px;text-transform: none;white-space: normal;widows: 2;word-spacing: 0px;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;"></span></span>
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   <span style="text-align: justify;font-size: 14px;"><span style="font-size: 14px;">综上可知，当风挡温度低于37<span style="font-size: 14px;">°C</span>时，打开风挡加温电门，WHCU控制风挡开始加温，当风挡温度接近<span style="font-size: 14px;">43°C</span>时，停止加温，如果由于传感器故障等原因，风挡继续加温至62<span style="font-size: 14px;">°C</span>时，将点亮OVERHEAT灯、<span style="font-size: 14px;">MASTER CAUTION灯</span><span style="font-size: 14px;">和ANTI-ICE灯</span>；当风挡温度高于37<span style="font-size: 14px;">°C</span>时，打开风挡加温电门，WHCU将不会控制风挡进行加温，风挡加温灯不会点亮。这是夏天比较常见的一种情况。</span></span>
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   <span style="text-align: justify;font-size: 14px;"><span style="font-size: 14px;">通常将电门置于OFF位，通过浇水等方法使风挡温度降低至37<span style="font-size: 14px;">°C</span>以下后再进行测试或打开风挡加温即可恢复正常。</span></span>
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               两种模式<span style="white-space: span-wrap;"></span>
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   <span style="text-align: justify;font-size: 14px;">WHCU与温度传感器之间的连接有多种方式，举例如下：</span>
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   <img class="rich_pages" src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/mmbiz_png/7ayb1fm1g85rycYwC5QRe8waAALrYX9u4AXaDZUcfu0Fpv0vPToD3ZFwKxvDdfz8zicL2fL84K3Z8up2wiciavlOg/640?wx_fmt=png" style="box-shadow: rgb(210, 210, 210) 0em 0em 0.5em 0px;font-size: 17px;">
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   <span style="text-align: justify;font-size: 14px;"></span><span style="color: rgb(136, 136, 136);font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 12px;letter-spacing: 0.544px;text-align: left;background-color: rgb(255, 255, 255);">▲1号风挡主备用传感器均与DWHCU连接</span>
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   <span style="text-align: justify;font-size: 14px;"> </span><span style="font-size: 14px;"> </span>
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   <span style="text-align: justify;font-size: 14px;"></span><span style="color: rgb(136, 136, 136);font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 12px;letter-spacing: 0.544px;text-align: left;background-color: rgb(255, 255, 255);">▲2号风挡备用传感器未与DWHCU连接</span>
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   <img class="rich_pages" src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/mmbiz_png/7ayb1fm1g85rycYwC5QRe8waAALrYX9uVnCDdicI9AKAMADfJ6dMslHkOkwVib4Z5dY4LB4aRDLGE0h5ouYth6Ng/640?wx_fmt=png" style="box-shadow: rgb(210, 210, 210) 0em 0em 0.5em 0px;font-size: 17px;">
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   <span style="text-align: justify;font-size: 14px;"> <span style="color: rgb(136, 136, 136);font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 12px;letter-spacing: 0.544px;text-align: left;background-color: rgb(255, 255, 255);">▲1号风挡主</span><span style="color: rgb(136, 136, 136);font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 12px;letter-spacing: 0.544px;text-align: left;background-color: rgb(255, 255, 255);">备用</span><span style="color: rgb(136, 136, 136);font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 12px;letter-spacing: 0.544px;text-align: left;background-color: rgb(255, 255, 255);">传感器与WHCU之间通过一个切换电门控制</span></span><br>
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</p>
<p style="text-align: justify;">
   <span style="text-align: justify;font-size: 14px;"></span><span style="color: rgb(136, 136, 136);font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 12px;letter-spacing: 0.544px;text-align: left;background-color: rgb(255, 255, 255);">▲2号风挡</span><span style="color: rgb(136, 136, 136);font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 12px;letter-spacing: 0.544px;text-align: left;background-color: rgb(255, 255, 255);">备用</span><span style="color: rgb(136, 136, 136);font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 12px;letter-spacing: 0.544px;text-align: left;background-color: rgb(255, 255, 255);">传感器悬空</span>
</p>
<p style="text-align: justify;">
   <br>
</p>
<p style="text-align: justify;">
   <span style="text-align: justify;font-size: 14px;">根据以上几种连接方式可知，我司飞机的2号风挡只有主传感器直接与WHCU（DWHCU）相连接，备用传感器悬空未用。我司飞机的1号风挡的主备用传感器均与WHCU（DWHCU）相连接。</span>
</p>
<p style="text-align: justify;">
   <span style="text-align: justify;font-size: 14px;"><br></span>
</p>
<p style="text-align: justify;">
   <span style="text-align: justify;font-size: 14px;">其中，对于WHCU构型的飞机，可以通过人工切换电门来选择工作正常的传感器，或者用来判断传感器的好坏；对于DWHCU构型的飞机，可以通过DWHCU设置传感器选择的两种模式：</span><strong><span style="font-size: 14px;">正常模式、超控模式</span></strong><span style="font-size: 14px;">。</span>
</p>
<p style="text-align: justify;">
   <span style="font-size: 14px;"><br></span>
</p>
<p style="text-align: justify;">
   <strong><span style="font-size: 14px;">正常模式：</span></strong><span style="font-size: 14px;">正常情况下，DWHCU选择一个温度传感器参数用以监控风挡温度，当这个传感器失效时，将点亮头顶板的OVERHEAT灯，这时需要手动重新开关一下相应的风挡加温电门，以使DWHCU选择另外一个温度传感器的参数。如果此时再次重新开关一下风挡加温电门，则DWHCU将再次选择已经失效的温度传感器的参数，这时将再次点亮OVERHEAT灯。为了避免这种情况，可以通过DWHCU设置超控模式。</span>
</p>
<p style="text-align: justify;">
   <span style="font-size: 14px;"><br></span>
</p>
<p style="text-align: justify;">
   <span style="font-size: 14px;"><strong>超控模式：</strong>通过DWHCU前面板可以设置超控模式，此时DWHCU自动选择工作正常的温度传感器，当一个传感器失效时，DWHCU自动选择另外一个正常的传感器，只有当两个传感器同时失效时，才会点亮头顶板的OVERHEAT灯。具体超控方式可参考AMM30-41-11。<br></span>
</p>
<p style="text-align: justify;">
   <br>
</p>
<section data-mpa-template="t" mpa-from-tpl="t">
   <section style="border-width: 0px;border-style: none;border-color: initial;" mpa-from-tpl="t">
         <section style="margin-top: 1em;margin-bottom: 1em;color: rgb(3, 113, 213);font-size: 14px;line-height: 20px;clear: both;border-color: rgb(3, 113, 213);" mpa-from-tpl="t">
            <section data-original-title="" title="" style="padding: 5px 10px;display: inline-block;color: rgb(255, 255, 255);font-weight: bold;border-top-left-radius: 3px;border-bottom-left-radius: 3px;background-color: rgb(3, 113, 213);" mpa-from-tpl="t">
               》》
            </section>
            <section data-bgless="lighten" data-brushtype="text" data-bglessp="20%" style="padding: 5px 10px;display: inline-block;color: rgb(255, 255, 255);font-weight: bold;border-top-right-radius: 3px;border-bottom-right-radius: 3px;background-color: rgb(3, 113, 213);" mpa-from-tpl="t">
               跳线<span style="white-space: span-wrap;"></span>
            </section>
         </section>
   </section>
</section>
<p>
   <br>
</p>
<p style="text-align: justify;">
   <span style="text-align: justify;font-size: 14px;">对于上边提到的2号风挡的备用传感器悬空，当主传感器失效时，可以通过跳线的方式将备用传感器与WHCU相连接。</span>
</p>
<p style="text-align: center;">
   <img class="rich_pages" src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/mmbiz_png/7ayb1fm1g85rycYwC5QRe8waAALrYX9uLn4wv4n2t7fX0zbw4cTsCvc8gy303hib0diaFHjiaDkLml8dbWibQ7nZgA/640?wx_fmt=png" style="box-shadow: rgb(210, 210, 210) 0em 0em 0.5em 0px;font-size: 17px;">
</p>
<p style="text-align: justify;">
   <span style="text-align: justify;font-size: 14px;"></span>
</p>
<p style="text-align: justify;">
   <span style="text-align: justify;font-size: 14px;">同时对于WHCU构型的飞机，当<span style="font-size: 14px;">风挡中的加温元件</span>存在电阻超标的情况时，为了延长风挡的使用期限，也可以通过跳线的方式来调节加温元件的电阻，来满足手册标准，具体程序可参考AMM30-41-21。</span>
</p>
<p style="text-align: center;">
   <img class="rich_pages" src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/mmbiz_png/7ayb1fm1g85rycYwC5QRe8waAALrYX9ua9mSmrtiaNbtvKExFficDibQ7suquh4c461W67ykCyfwl0Fz8GFDib8FdA/640?wx_fmt=png" style="box-shadow: rgb(210, 210, 210) 0em 0em 0.5em 0px;font-size: 17px;">
</p>
<p style="text-align: justify;">
   <br mpa-from-tpl="t">
</p>
<section data-mpa-template="t" mpa-from-tpl="t">
   <section data-role="paragraph" style="border-width: 0px;border-style: none;border-color: initial;" mpa-from-tpl="t">
         <section style="width:100%;display:flex;display:-webkit-flex;justify-content:center;-webkit-justify-content:center;align-items:center;-webkit-align-items:center;" data-width="100%" mpa-from-tpl="t">
            <section style="width:45px;" mpa-from-tpl="t">
               <img src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/mmbiz_png/b96CibCt70iaaTuCKQ0GWZica1bCbcaogd3DUafiaUiavc4hgn55p5a3EXrPzT04VnQxg1aN4XR9aONsYa8w385niaxg/640?wx_fmt=png" data-width="100%" style="width:100%;">
            </section>
            <section style="font-size: 20px;color: rgb(239, 158, 36);padding-right: 10px;padding-left: 10px;" data-brushtype="text" mpa-from-tpl="t">
               <strong mpa-from-tpl="t">案例分享</strong>
            </section>
            <section style="width:45px;" mpa-from-tpl="t">
               <img src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/mmbiz_png/b96CibCt70iaaTuCKQ0GWZica1bCbcaogd3G8Lu8yd9VAZuKXn59qdw9flePwXicBhhLoCPdOcLLqYHI4ep3zMicWlA/640?wx_fmt=png" data-width="100%" style="width:100%;">
            </section>
         </section>
   </section>
</section>
<p>
   <br mpa-from-tpl="t">
</p>
<p style="text-align: justify;">
   <span style="font-size: 14px;">1、B-20XX飞机过站检查发现右二号风挡加温进行过热测试时OVERHEAT灯不亮， WHCU灯光无显示，复位跳开关后正常，自检有故障历史WHCU本体故障，更换WHCU后测试正常。</span>
</p>
<p style="text-align: center;">
   <img class="rich_pages" src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/mmbiz_png/7ayb1fm1g85rycYwC5QRe8waAALrYX9ugcmaRzrZJ12YT3Qw0NJJsqP1IQ672HsrVGfGyvlPzu4KDgeDONn8fQ/640?wx_fmt=png">
</p>
<p style="text-align: justify;">
   <span style="font-size: 14px;"></span><br>
</p>
<p>
   <span style="font-size: 14px;">2、</span><span style="font-size: 14px;">B-58</span><span style="font-size: 14px;">XX</span><span style="font-size: 14px;">飞机航前</span><span style="font-size: 14px;">检查发现</span><span style="font-size: 14px;">右二号风挡加温ON灯不亮，灯光测试正常，关闭后对风挡进行降温后重新打开加温正常。</span>
</p>
<p style="text-align: center;">
   <img class="rich_pages" src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/mmbiz_png/7ayb1fm1g85rycYwC5QRe8waAALrYX9uataYNranWia9D79iaF1QKAhzYNMFGU7LDzFk74BpWBaHdS74UMKx2m8A/640?wx_fmt=png">
</p>
<p>
   <span style="font-size: 14px;"></span><br>
</p>
<section data-tools="新媒体排版" data-style-type="undefined">
   <p style="margin: 0em 1em;min-height: 1em;color: rgb(62, 62, 62);font-size: 16px;white-space: normal;text-align: right;max-width: 100%;box-sizing: border-box ;overflow-wrap: break-word ;">
         <strong style="max-width: 100%;box-sizing: border-box ;overflow-wrap: break-word ;">／End.</strong>
   </p>
</section>
<p>
   <br>
</p>
<section class="_editor" data-support="96编辑器" data-style-id="24435">
   <section class="_editor" data-support="96编辑器" data-style-id="24435">
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               </p>
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               </p>
               <p style="letter-spacing: 2px;text-align: left;">
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<p>
   <br>
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packing 发表于 2021-2-16 23:28:01

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我是咕咕鸡 发表于 2021-2-17 07:01:22

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机务君 发表于 2021-2-18 08:45:46

小同星星控发表于 2021-02-17 07:01
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机务君 发表于 2021-2-18 08:46:00

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w9527 发表于 2021-2-18 12:47:21

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系统学习 ｜ 风挡加温

系统学习｜风挡加温