桥式起重机安装调试

控制系统通电后，调试、维护人员在操作时必须十分小心。断开电源后，变频器充电指示灯要等到电量消退后才能触摸到柜内的元器件。严禁把输入电源接到变频器输出端子u、V、W上，否则会烧毁变频器。严禁把输出端子u、V、w之间的绝缘电阻接在地上，否则会损坏变频器。严禁用兆欧表测量输出端子u、V、w之间或对地的绝缘电阻，否则会损坏变频器。

当一台变频器控制多台并联电动机时，如单梁起重机运行机构，需在变频器与每台电动机之间设置热继电器，当某台电动机过热时，继电器的触点应进入控制电路，以便暂停变频器的运行，以维持电动机的过热。当起升机构用变频器只控制一台电动机时，由于变频器具有过流、过热等多种维护功能，因此不需要设置热继电器。

The thickness of the steel plate used in the manufacture of single girder overhead cranes is generally 6-12mm, plus the negative public service of the steel plate itself. Thus, the rust layer on the single girder overhead travelling crane should not be ignored. Together, the appearance of the oxide layer and rust on the crane’s painting life also has a great impact, because the rust layer and oxide layer is simple to fall off, so if you do not eradicate the oxide layer and rust layer before painting, the back of the paint will appear oxide layer flaking, flaking, peeling, etc. FF, not only affect the crane’s beauty, and. As a result, the steel exterior loses maintenance and further rusts, posing a threat to the structural safety of the crane.

After the wiring of the inverter is completed, the correctness of the wiring of each line should be checked first. Under the premise of ensuring correct wiring, first cut off the power supply of each organization’s inverter, and then connect the total power supply. Check the correctness of the main control circuit, limiters, auxiliary power supply, lighting power supply and other auxiliary power supplies, and connect the power supply of the corresponding organizations in turn, and debug the inverter and its speed control system.

单梁起重机的主体结构为钢结构焊接件，常用的制造材料有钢板、型材等。这些材料一般都是从钢材市场采购的，表面都会有一层锈迹。锈迹是由于表面与空气中的氧气和水分发生反应，形成氧化层而产生的。

制造单梁起重机的钢材在焊接前均经过预处理，即外观精加工达到Sa2.5规范。为满足起重机喷涂除锈等级及外观粗糙度的要求，手工除锈不能满足要求，必须采用喷涂法，即干喷砂、喷丸、喷丸。三种方法中耗时最长的是喷丸。喷丸后钢材外观应在2小时内涂刷防锈底漆。环氧富锌底漆是国内常用的底漆，该底漆对钢材后续焊接影响较小，可使钢材外观保持较长时间。