Bogie bottom anti-drag cladding plate and high-speed train bogie thereof

By designing a drag-reducing coating plate at the bottom of the bogie and optimizing the airflow path, the problems of uneven flow and high resistance at the bottom of the bogie were solved, achieving significant drag reduction and flow field improvement, which is suitable for high-speed train bogies.

CN122253933APending Publication Date: 2026-06-23HUNAN UNIV +1
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Patent Information

Application Number
CN202610665163.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-14
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

In the existing technology, the flow in the middle area at the bottom of the bogie is uneven, with strong local disturbances and large resistance. The existing covering scheme is not targeted enough for the central area, which causes obvious flow separation and vortices when the airflow passes through this area, increasing the resistance.

Method used

A drag-reducing coating plate for the bottom of a bogie is designed, including a torsion bar coating plate, a first coating plate, and a second coating plate. The airflow path is optimized by a guide slope to reduce local flow separation and eddies. Computational fluid dynamics is used to identify key disturbance areas and optimize the configuration to form a continuous bottom guide surface.

Benefits of technology

It reduces aerodynamic drag in the bogie area by more than 10.5%, improves flow field distribution, adapts to the limited space at the bottom of the bogie, and balances structural rigidity and ease of maintenance, thus having good engineering application value.

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Abstract

The invention discloses a bogie bottom anti-drag cladding plate and a high-speed train bogie thereof.The cladding plate comprises a torsion bar cladding plate used for cladding a torsion bar of a bogie frame, a first cladding plate used for being connected with a crossing beam on one side of the torsion bar and a second cladding plate used for being connected with a crossing beam on the other side of the torsion bar; the first cladding plate and the torsion bar cladding plate form a first flow guide inclined plane, the second cladding plate and the torsion bar cladding plate form a second flow guide inclined plane, and the flow guide directions of the first flow guide inclined plane and the second flow guide inclined plane are symmetrically arranged. The air flow originally acting on the central pin hole and the area nearby the torsion bar is guided to the position below the torsion bar wrapping plate, so that the original complex and abrupt change bottom appearance nearby the central pin hole and the torsion bar is locally wrapped and subjected to flow guide optimization, a continuous bottom flow guide surface is formed, direct interference between the air flow and a bottom complex component is weakened, and the service life of the torsion bar is prolonged. Local flow separation, backflow and vortex intensity is reduced, flow field distribution at the bottom of the bogie is improved, and then the purpose of reducing aerodynamic resistance of a bogie area is achieved.
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