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The Research of Characteristics and Key Technologies of Air Suspension in Low-Speed Maglev Train

Author: LuJian
Tutor: ZhaoZhiSu
School: National University of Defense Science and Technology
Course: Mechanical Engineering
Keywords: Maglev Train Air spring suspension Free diaphragm air spring Limited lateral restraint diaphragm air spring suspension
CLC: U266.4
Type: Master's thesis
Year: 2007
Downloads: 113
Quote: 1
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Abstract


The maglev train technology, not only to the pursuit of higher speeds, but also to the pursuit of a better quality running. Air spring suspension system is not only able to solve the the mechanical decoupling issues, as well as to meet the quality requirements of the run. The air spring with a change in load inflated or exhaust. Both the vehicle body is always maintained at a certain height, but also to maintain the self-oscillation frequency is almost constant in any load, so that the suspension means has a very smooth performance. But because of the poor free film air spring, lateral stability, the lateral limit devices must be added to ensure lateral stability, which resulted in the suspension lines of vertical performance change, which affects the suspension control system, which is Maglev trains secondary suspension urgent problem. The target air spring suspension system in low-speed maglev train, and conducted in-depth research and analysis, and on this basis, for maglev train used air suspension system structure improvement program. The details are as follows: 1, study and explore the structural characteristics and advantages of the free diaphragm air spring. And in the analysis and comparison of the structure and characteristics of the suspension mechanism, a new air suspension lateral stability of the structure. The method uses a limited air spring lateral constraints, by the side wall of the contact pressure of the air spring mounting slots to withstand lateral load is applied to the magnetic levitation train, reach a larger lateral force both to ensure the air suspension can withstand the maglev train the purpose of reducing the vertical characteristics of the lateral air spring limiting mechanism, simplify the structure of the bogie. 2, the structural characteristics of the maglev train on the free diaphragm air spring suspension, integrated a large number of data and the theoretical analysis of air spring in the literature, as amended and free diaphragm air spring vertical stiffness and lateral stiffness formula is derived to establish limited lateral restraint diaphragm air spring stiffness analysis of the mathematical model. 3, using the finite element analysis software ANSYS to establish the finite element model of the free diaphragm air spring suspension diaphragm air spring of freedom and limited wall constraint inflation pressure and load of the air spring to do a limited impact on the shape and stiffness elements analysis, comparing the impact of the limited the sidewalls constraints structure of the air spring stiffness and deformation. Comprehensive theoretical analysis the conclusions and finite element simulation data results, design calculations the the empty spring constraint sidewall clearance and air spring cover and sidewall height, to verify the feasibility of limited lateral restraint structure.

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CLC: > Transportation > Rail transport > Locomotive works > EMU,EMU (power train ) > Non- wheel rail Department of locomotives, Maglev,gas floating car
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