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<h1 class="h1">柴油发电机起动后速度为1500rmin</span></h1>
<div class="text">发布来源：康柴（深圳）电力技术有限公司　　发布日期: 2024-08-09　　访问量:2646</div>
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<p>&nbsp;转速是柴油发电机装备中较基本、较重要的参数之一，启动时的点火速度、运行中的速度调整、飞车时的停机保护、甚至负荷的大小也能从速度的大小上得到体现，因此转速测量是柴油发电机监控保护的基础。&nbsp;通常柴发机组中速度的测量有二处，一是主机速度的测定，二是涡轮增压器转速的测定。</p><p>传感器是一个近程感应开关，不通过接触就可以作业。它由振荡器、触发器及放大器结构，通过振荡器电路线圈发生一交变电磁场。在金属导体接近传感器时交变磁场就会产生变化，振荡器的输出电压随之发生变化，频率也发生变化。</p><p>转速保护系统具有很大的优点，尤其是超速机构具有多重保护用途。它的传感器(测速探头)和被测定的旋转物体没有直接接触，所以没有磨损，拆除检修方便，机组运转时也可以维修更替探头，接线也方便。其中主机的转速变送器还具有电机轴承预润滑泵操控、励磁投入、同期闭锁、电气飞车跳机、速度控制器超速跳机等功用。同时在柴油发电机组本体上还设置了机械飞车保护装置，在很大程度上保证了柴发机组安全稳定运转(额定速度1500转/分)，不会出现飞车损坏。但同时也存在一些问题：飞轮高速运转时的窜动会造成探头损伤，转速表经常发生波动甚至无转速，电气超速保护误动等，还出现了由于速度指示波动使发电机预润滑泵频繁启停，引起烧毁发电机轴承预润滑泵电机或其接触器线、探头与飞轮之间的距离太远或太近一般此距离约为2.5+0.3mm。距离太远将有可能感应不到信号，太近有可能磨坏传感器的工作面。由于飞轮在高速运转中，会发生径向(或轴向)窜动，距离太近对传感器的安全结构极大威胁，曾经发现有几个传感器的工作面已被刮破。根据实际经验，该距离一般在2mm左右较为适宜，可用塞尺测量。</p><p>2、因为传感器装配固定架震动，使得检测信号不正确，交变磁场发生不规则变化，引起转速指示波动。解决举措：加固该支架，可以将其与柴油发电机组本体焊接。&nbsp;</p><p>3、由于飞轮甩出来的油粘在传感器作业面上，对测定结果产生一定的危害。若在飞轮上加装防油罩，可起到良好效果。&nbsp;</p><p>4、转速变送器故障，使输出信号不稳定，造成速度指示波动甚至无速度指示，而且因为其作业不稳定和接线头的接触不好会触发电气超速保护误动作。对此可用频率发生器输入频率信号对速度变送器进行校验，端子进行紧固。由于该速度变送器为PLC微电脑控制，必要时可重新调整或更替。&nbsp;</p><p>在测定好间距之后，开盘车机观察传感器上的红色发光二极管，当飞轮齿通过时，其发光亮度会明显提高，或不开盘车机用金属物靠近或远离探头，观察红色发光二极管亮度有无变化，如果亮度没有变化或者根本没有发光，则可能是传感器损坏，需要更换。</p><p>6、柴油发电机启动后转速为1500转/分，同时用诊断仪检修后报出只有凸轮轴探头信号，无曲轴速度探头信号。</p><p>①车在启动时很困难，而且在将要起动的一瞬态柴油发电机发出很大的“咔、咔声，启动后速度只能达到1500转/分，柴油发电机进入 “跛行”回家状态。</p><p>③毫无疑问首先要从曲轴速度探头开始清除，经过检验发现曲轴速度探头上没有线束接插件，而是被扔在一旁。</p><p>⑤推断此故障是操作人员在安装进气管固定支架时，为了方便装配支架，拔掉了曲轴转速传感器接插件。重新插上后柴油发电机作业恢复正常。</p><p>（1）损坏现状：因未进行整车标定，故障灯常亮。并且ECM端子2.15、2.16弯曲，造成水温感应器损坏。</p></div><a href="http://www.gdkmsfdj.com/" target="_blank">http://www.gdkmsfdj.com</a>
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