A fairing and rail vehicle

By setting a tapered-expanding flow channel and a toothed structure to break up vortices on the fairing, combined with porous metal fiber sound-absorbing material, the problem of low-frequency noise from the pantograph hole in traditional methods is solved, achieving a wide-band high-efficiency noise reduction effect, improving driver and passenger comfort and train operation stability.

CN122324074APending Publication Date: 2026-07-03CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-27
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Traditional methods are ineffective in reducing low-frequency aerodynamic noise from the pantograph hole, which affects the comfort of drivers and passengers and interferes with the normal operation of the train.

Method used

A flow guide is designed to actively guide airflow and suppress the formation of turbulent eddies by setting a gradually narrowing-expanding flow channel structure and a toothed structure on the cover. A toothed structure is set at the trailing edge of the flow guide to break up large eddies into micro eddies. Combined with a porous metal fiber sound-absorbing material, active noise reduction is achieved.

Benefits of technology

It significantly reduces pantograph hole noise by 7 dB(A), especially in the low and mid frequency range, improving driver and passenger comfort and reducing noise interference, thus reducing the impact of aerodynamic noise on train operation.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122324074A_ABST
    Figure CN122324074A_ABST
Patent Text Reader

Abstract

This application relates to a fairing and a rail vehicle. The fairing includes two covers arranged in a front-to-back direction. A groove is formed through one side of each cover along its thickness direction, and the width of the groove gradually decreases from top to bottom along the thickness direction. A first guiding surface is formed on the surface of each cover. The groove openings of the two covers are connected, forming a pantograph hole. A second guiding surface is formed on the inner wall of the groove, circumferentially surrounding the pantograph hole. The first and second guiding surfaces are circumferentially connected. This fairing can effectively reduce the aerodynamic noise of the pantograph hole, improve the comfort of the driver and passengers, and reduce noise interference with normal train operation.
Need to check novelty before this filing date? Find Prior Art