论文部分内容阅读
桥式起重机在吊运作业时,以两终端为支点的主梁中段经常承受着变化力矩的扭拉作用,这种扭拉作用势必导致主梁产生弹性变形(下挠),导致小车负载爬坡及滑坡失控现象的出现,给小车的正常运行带来较大阻力(有时可能大至50%),从而降低整机的吊运能力。为了尽量消除这种阻力,桥式起重机主梁在制造安装后就必须保证有一个合理的上拱度。可见主梁拱度达标与否对桥式起重机至关重要,因此我国的标准与检规
During the lifting operation of overhead traveling crane, the mid-section of the main girder with both ends as the fulcrum is often subjected to the twisting action of varying torque, which will inevitably lead to elastic deformation (deflection) of the main girder and cause the load of the car to climb And landslide out of control the appearance of the car to the normal operation of a greater resistance (and sometimes up to 50%), thus reducing the lifting capacity of the machine. In order to try to eliminate this resistance, the bridge crane girder after manufacturing and installation must ensure that there is a reasonable camber. Can be seen that the main girder arch standard or not essential for the bridge crane, so our standards and regulations