塔吊回转体底部轴承因为既要承受轴向力,又要承受径向力,运转承载量大,加上在使用中往往因为保养不当,因此损坏情况时有发生。拆换塔吊底部轴承很费工时,拆卸安装十分麻烦,需要放下配重,落下大小臂,顶起回转体等程序,最快也要两 Because the bottom bearing of the tower crane rotating body needs to bear axial force as well as radial force, the operation carrying capacity is large, and it is often due to improper maintenance in use, so damage occurs from time to time. It is time-consuming to dismantle the bottom bearing of the tower crane. It is very troublesome to disassemble and install. It is necessary to put down the counterweight, drop the big arm, lift up the rotary body and other procedures.