High-speed maglev bridge large displacement expansion device

Abstract

The invention discloses a large-displacement telescopic device for a high-speed maglev bridge, which is characterized in that: a unique long stator track unit module system is constructed, including a beam unit and a long stator track assembly, and the small segment of the stator core and the long stator coil are realized The continuous scalability of the high-speed maglev train can be adapted to the suspension, guidance, traction drive and emergency travel of the running wheel at the same time, and a new longitudinal beam system, fastener system, longitudinal limit system, connecting rod system and spring system are also designed. Several sub-systems have realized the large-displacement expansion and contraction of high-speed maglev transportation. It is not only suitable for the composite beam scheme, but also suitable for the pure track beam scheme or the bridge scheme with track slabs laid on the bridge; the structure is small in size, the structural force is clear, and the durability is good; through the synergistic effect of the connecting rod system and the spring system, It can make the longitudinal gap between any two long stator track unit module systems equal in any telescopic state.

Description

technical field [0001] The invention belongs to the field of high-speed maglev bridges, in particular to a large-displacement telescopic device for high-speed maglev bridges. Background technique [0002] The charged levitation electromagnet on the levitation frame of the high-speed maglev train and the long stator core on the track attract each other to provide the levitation force for the train, attract the train upwards, and ensure a stable levitation gap by controlling the levitation excitation current. The suspension gap between the electromagnet and the track is generally controlled at 8mm-12mm. [0003] The charged guiding electromagnet on the suspension frame interacts with the guiding plate on the side of the track to provide guiding force to keep a certain lateral distance between the car body and the track to realize non-contact guiding in the horizontal direction. [0004] The drive of the high-speed maglev train adopts the non-vehicle power device - the long st...

AI Technical Summary

Problems solved by technology

[0007] 1. It is only applicable to the composite beam scheme (that is, the simply supported track beam scheme on the bridge), and not applicable to the pure track beam scheme or the bridge scheme with track slabs laid on the bridge;

[0008] 2. The structural volume is too large, and the length of each track beam is at least 4 meters. If the telescopic device is to adapt to a telescopic amount of more than 1000mm, the length of the telescopic device will reach more than 40 meters;

[0009] 3. There are many movable supports, the installation accuracy is not easy to control, and the horizontal deformation of the uneven size of the gap is prone to occur when the vehicle passes

[0012] 1. It is only applicable to the composite beam scheme (that is, the simply supported track beam scheme on the bridge), and not applicable to the pure track beam scheme or the bridge scheme with track slabs laid on the bridge;

[0013] 2. The structural volume is too large, and the length of each track beam is at least 4 meters. If the telescopic device is to adapt to a telescopic amount of more than 1000mm, the length of the telescopic device will reach more than 40 meters;

[0014] 3. There are defects in the structure of the convex head and the concave head, and there are many weak points under local stress, and the structure is prone to cracking and damage;

[0015] 4. The convex and concave heads are prone to collide with each other under the action of vehicle braking force. Under the long-term mutual collision, the durability of the structure is extremely poor

[0018] The beam gap between two adjacent bridge beam structures of the existing high-speed maglev traffic can expand and contract at a maximum of about ±50mm (the maximum beam gap distance is about 100mm), and the maglev traffic needs to use a long-span bridge structure to cross obstacles or large rivers. The expansion and contraction of the beam end gap of long-span bridges can reach more than 500mm to 1000mm. The existing expansion devices cannot meet the suspension, guidance, traction and driving of high-speed maglev vehicles at the beam gap position and pass through the beam gap smoothly, or there are many technical defects. It is necessary to install large-displacement telescopic devices that meet the above requirements at the beam joints to meet the needs of high-speed maglev traffic across various large obstacles or large rivers

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