摘要
Abstract
By summarizing and analyzing the advantages and disadvantages of the existing design scheme of movable counterweight for tower crane, a new design scheme of crane top parts such as swing balance arm, lattice tower head and rotary upper support is proposed on the basis of SXD 50 tower crane. The rocking balance arm adopts a parallelogram structure and consists of two parallel truss structures, a platform, a luf?ng mechanism and a counterweight. The movement around the rotating platform under the traction of the luf?ng mechanism is controlled by the luf?ng control system of the balance arm to generate a backward tilting moment equal to the forward tilting moment to realize the moment balance of the crane tower. The balance arm luf?ng mechanism is located on the platform, which makes full use of the overhead space of the crane and can also be used as a counterweight. The balance arm and the boom can be folded at the top, which is convenient to dismantle and can meet the needs of the erection construction of the transmission line tower. The balance arm, tower head and platform all pass the structural strength check calculation and can meet the design requirements.关键词
塔式起重机/可移动配重/摇动式平衡臂/铁塔组立/有限元Key words
tower crane/movable counterweight/swinging balance arm/iron tower assembling and erection/finite element分类
机械制造
