新型电磁感应加热式道岔融雪系统设计及试验研究OA

[Objective]Driven by the application requirements of heaters for railway turnout snow-melting and in response to the deficiencies of existing heating systems,a novel electromagnetic induction heating solution is proposed.[Methods]By comprehensively considering the characteristics and practical application needs of turnout snow-melting,the internal mechanism and influencing factors of induction heating were analyzed.Based on finite element analysis software,simulation models of the electromagnetic field and temperature field were constructed for multiphysics analysis.Prototypes were fabricated for experiments to verify the accuracy of the models and to comparatively analyze the differences in temperature distribution and snow-melting performance between the traditional resistance heating system and the new induction heating system.[Results]The results showed that approximately 98％of the heat was generated by the heating plate.Beyond 5 mm from the device surface,the spatial magnetic induction intensity dropped sharply to below 1 μT,which fully demonstrated that the newly designed electromagnetic induction heating system could effectively mitigate electromagnetic interference.Compared with the traditional resistance heating system,the heat transfer to the rails was reduced,more heat was directly applied to the working area,the ice and snow melting rate was significantly increased by 1.4 to 1.8 times,and the energy consumption was reduced by 30％to 45％.[Conclusion]The heating power of the system can be adjusted by changing the excitation current and frequency.The system features simple installation and disassembly,does not affect normal railway operations,and can adapt to different track structures,thus providing an efficient,energy-saving solution for railway turnout snow-melting operations.