球管故障判断

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                    <p style="line-height: 1.5em;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">当机器出现故障。通过如下分析可判断是否为球管问题</span></p><p style="line-height: 1.5em;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  />(1)<span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%;">扫描间室温过热，扫描间的温度要控制在</span>22℃<span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%;">恒温 因为图像接收部分温度保持在</span>40℃<span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%;">左右．图像质量才有保证．过低或者过高都会造成伪影在扫描</span>间安装温度计和3<span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%;">台以上独立空调．不建议安装暖气。如果不能扫描．并且扫描间温度超过</span>30℃ <span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%;">，建议先降温。当室内温度稳定在</span>22℃<span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%;">后．再尝试扫描</span><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></span></p><p style="line-height: 1.5em;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><br  /></span></p><p style="line-height: 1.5em;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">( 2)<span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%;">如遇外电网断电．扫描架需要按下复位键，进行系统初始化．与操作台通讯正常后．才能进行扫描</span></span></p><p style="line-height: 1.5em;"><span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; font-size: 16px;">(</span></p><p style="line-height: 1.5em;"><span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; font-size: 16px;">3)GE<span style="margin: 0px; padding: 0px; max-width: 100%; font-family: 宋体;">球管分大小焦点．尝试更改扫描条件，把曝光管电流量调低或者调高，球管在某一焦点长时间使用后．这一焦点会损坏，</span>320 mA<span style="margin: 0px; padding: 0px; max-width: 100%; font-family: 宋体;">左右是分界点．如另一焦点能够曝光．则说明该焦点可能损坏</span></span></p><p style="line-height: 1.5em;"><img data-size="300,640" src="http://mmbiz.qpic.cn/mmbiz/A1DicCH9Vl6MKeY4zOb38Z9y9LWx4ukcdgMI6DqzSP1b5rhmCt0s8icQVUfBxZbichgXSFP9FaAcjyTVZx5hRaTSA/0?wx_fmt=jpeg" style="margin: 0px; padding: 0px; box-sizing: border-box !important; word-wrap: break-word !important;" data-ratio="0.7490118577075099" data-w=""  /></p><p style="line-height: 1.5em;"><img data-size="300,640" src="http://mmbiz.qpic.cn/mmbiz/A1DicCH9Vl6MKeY4zOb38Z9y9LWx4ukcdGvrhdDYqO2UiaLlu9GtFib8icCw2sTnxhR6B8zJMo3nVibibkpEwgdsYHEA/0?wx_fmt=jpeg" style="margin: 0px; padding: 0px; box-sizing: border-box !important; word-wrap: break-word !important;" data-ratio="0.66600790513834" data-w=""  /></p><p style="line-height: 1.5em;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%;"></span><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  />(4)<span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%;">球管灯丝开路：表现为有高压。</span><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  />但无管电流或电流出现较大波动．图像为晶格状(<span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%;">大理石面</span>)<span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%;">或细麻饼状。</span><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  />测试方法：先测量灯丝电压．如果正常．可直接从高压电缆头处测量灯丝电阻，电阻应在2Q <span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%;">以下。需要注意：有时灯丝处于半开路状态． 容易引起误</span><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  />判．需多次测量才可论断<br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /><br  /></span></p><p style="line-height: 1.5em;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">(5)<span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%;">球管阳极不转或转速低于额定值：表现为</span>CT<span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%;">机扫描起始即出现旋转阳极错误，其原因是：一是旋转阳极轴承磨损或靶面碎屑过多：二是定子线圈开路或内部匝间短路．在阳极转子加速时出现不正常的旋转噪音等</span><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /><br  /></span></p><p style="line-height: 1.5em;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">(6)<span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%;">球管管套内高压打火：现象是提示过载错误。球管在工作状态时．内部温度很高</span>(<span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%;">瞬间达到</span>3 000℃ <span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%;">以上</span>)<span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%;">，管套内油会热胀冷缩。连续曝光时．球管内气囊会张开．冷却时气囊会收回．保持管套内有合适油压。如果油路密封件老化或弹性失效．空气就会进入．形成气泡，气泡较小时会听见球管内啪．</span><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  />啪”<span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%;">打火声．气泡较大时．会在启动高压瞬间就报过载错误</span><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /><br  /></span></p><p style="line-height: 1.5em;"><span style="font-size: 16px;"><span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">(7)<span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%; font-family: 宋体;">管芯内部打火：管芯真空度下降或因外壳在高温油压下出现裂纹均会引起剧烈过载。现象是：启动瞬间即提示过载错误．严重时会使高压供电回路跳闸</span>判断阴、阳极打火，做高压开路曝光实验</span><span style="font-size: 14px;">管套内跳火故障，该类故障在CT</span><span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%; font-family: 宋体;">球管中比例不低，以往都是作为损坏报废处理。仔细分析，因为跳火只发生在管套内，而内中的球管却并未损坏。我们完全可以设法将跳火排除，使其复生。</span></span></p><p style="line-height: 1.5em;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; font-family: 宋体;"><br  /></span></p><p style="line-height: 1.5em;"><span style="font-size: 16px;"><span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%; font-family: 宋体;">从理论上分析，发生跳火的情况有三种：一是阳极对地；二是阴极对地；三是阴极对阳极。实际上，密闭油封管套内球管阴阳极之间跳火几乎是不可能发生的，因为两极之间相隔甚远。所以跳火发生在单极对地</span><span style="font-size: 14px;">(</span><span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%; font-family: 宋体;">外壳</span><span style="font-size: 14px;">)</span><span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%; font-family: 宋体;">之间。</span></span></p><p style="line-height: 1.5em;"><span style="font-size: 16px; margin: 0px; padding: 0px; max-width: 100%; font-family: 宋体;"><br  /></span></p><p style="line-height: 1.5em;"><span style="font-size: 16px;"><span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%; font-family: 宋体;">那么，跳火是怎么发生的呢</span><span style="font-size: 14px;"></span><span style="font-size: 14px; margin: 0px; padding: 0px; max-width: 100%; font-family: 宋体;">一个原因是布线位置不合理，高压线距离外壳过近；二是绝缘油质量不佳，出现碳化；然而最常见的是管套内有残余气体或有漏气现象，引起其放电。故伴随着高压跳火可以发现管套内有气体和观察窗口有油的渗漏现象。这类故障只要耐心仔细处理，相信一定是能修复的。</span></span></p><p style="white-space: normal; text-align: center; line-height: 1.5em;"><span style="font-size: 16px;"><strong style="margin: 0px; padding: 0px; max-width: 100%; font-family: 宋体; font-size: 15px; color: rgb(192, 0, 0); line-height: 31px; box-sizing: border-box !important; word-wrap: break-word !important;">您看此文用</strong><strong style="margin: 0px; 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background-attachment: scroll; box-sizing: border-box !important; word-wrap: break-word !important; width: auto !important; visibility: visible !important;"  />·<img src="http://mmbiz.qpic.cn/mmbiz/iaXDmvibibwTLUAqg2cUWlqgcoLtmRHicBkdQBsldXraDZeNRwDdcww394we5KKBPt036GGPN2diaLSLPLTwApNefjA/0?wx_fmt=gif" data-ratio="2.25" data-w="16" style="margin: 0px; padding: 0px; background-image: none; background-attachment: scroll; box-sizing: border-box !important; word-wrap: break-word !important; width: auto !important; visibility: visible !important;"  /> <img src="http://mmbiz.qpic.cn/mmbiz/iaXDmvibibwTLUAqg2cUWlqgcoLtmRHicBkdrxmJuf7iccaD6rlYuYeKE0tqFQWUdIib3aNJXAOaOIaalQunB2n02DOA/0?wx_fmt=gif" data-ratio="2.25" data-w="16" style="margin: 0px; padding: 0px; background-image: none; background-attachment: scroll; box-sizing: border-box !important; word-wrap: break-word !important; width: auto !important; visibility: visible !important;"  />秒，转发只需1秒呦~</strong></span></p><hr style="white-space: normal; 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