中低速磁浮大位移轨道伸缩装置设计与创新

中低速磁浮交通跨越大江大河时需要采用大跨度桥梁,现有轨道伸缩接头无法满足大跨度桥梁几百毫米甚至上千毫米的伸缩变形,需要研制大位移轨道伸缩装置。借鉴现有中低速交通轨道伸缩接头以及其他桥梁或轨道伸缩装置的构造和伸缩原理,并进行系统性创新,提出由小纵梁系统、纵向滑槽系统、模数式轨道单元系统、X形连杆与弹簧系统等4大系统组成的中低速磁浮交通模数式大位移轨道伸缩装置,可通过设计不同长度的多跨连续小纵梁支撑不同数量的模数式轨道单元实现±100~±1 000 mm的伸缩量,为中低速磁浮交通跨越大江大河这一关键技术难题提供了解决方案,对于磁浮交通的进一步推广应用具有重要意义。

Design and innovation of the large displacement track expansion device for medium and low speed maglev transit

It needs to use large-span bridges when the medium and low speed maglev transit lines cross large rivers. The existing track expansion joints can’t meet the expansion deformation of large-span bridges of several hundred mm or even one thousand mm. Therefore, it is necessary to develop the large displacement track expansion device. Referring to the construction and expansion principle of the existing expansion joints of medium and low speed maglev transit and other bridge or track expansion devices, and making systematic innovation, this paper put forward the module type large displacement expansion device of medium and low speed maglev transit. This was composed of four major systems, i.e. small longitudinal beam system, longitudinal chute system, modular track unit system, X-shaped connecting rod and spring system. Through the design of different length of multi-span continuous small longitudinal beam supporting different number of modular track units, the expansion of ±100 mm to ±1 000 mm could be realized. The results provide the solution for the key technical problem of how can the medium and low speed maglev transit lines cross large rivers. So it is of great significance for the further promotion and application of maglev transit.