全速转弯型轨道集装箱门式起重机设计

Key points of design of full-speed rail container gantry crane

大跨度高速轨道集装箱门式起重机在大车行走时会容易产生啃轨现象,在弯曲轨道上更加明显,业界在从直轨入弯轨并在弯轨行走时通常采用降低大车速度,慢速入弯的方法,严重影响机器的效率。文中对全速转弯和弯道行走技术进行了深入研究,通过刚柔腿桁架钢结构解决大跨度轨道吊大车行走时的啃轨;通过ADAMS仿真技术辅助设计,得到大车各级机构偏移角度和水平位移,开发出具有2级回转轴承的双自由度台车,来满足弯曲轨道上大车行走时各级相对转动问题;台车前后配有4个水平轮,解决弯道导向和全速入弯出弯问题;通过电控系统的弯道速度补偿,实现弯道大车不减速。理论和实际相结合,经现场调试后,实现了弯道全速运行,过弯不减速。此方法为提升弯道运行效率提供了一条可行的途径。

During cart travelling,the container gantry crane with a large span and high speed track is prone to rail gnawing,which is more obvious on the curved track.When the crane enters a curved track from a straight track and travels on a curved track,the common industry practice is to reduce the speed of the cart,which will seriously affect the efficiency of the machine.In this paper,the technology of full-speed turning and curved track travelling is deeply studied,and the problem of rail gnawing when the large-span rail crane is travelling is tried to be solved by adopting a rigid-flexible leg truss steel structure;with the aid of ADAMS simulation technology,the offset angle and horizontal displacement of the mechanisms at all levels of the cart are obtained,and a two-degree-of-freedom trolley with two-stage slewing bearings is developed to meet the relative rotation problem of the mechanisms at all levels when the cart is moving on the curved track.The trolley is equipped with four horizontal wheels at the front and rear,which solves the problems of curve guidance,entering and leaving the curved track at full speed;the electric control system is used to compensate the speed of the curved track,so that the cart need not to slow down.Combined with the theory and actual situation,after field debugging,the cart can travels on the curved track at full speed.This method provides a feasible way to improve the efficiency of curved track operation.