Abstract
A specific air quality exists in underground railway stations, influenced by railways operations as infrastructure wears, mechanical braking or station design and ventilation. Among solutions existing to improve the air quality (air treatment in the station; use of less emissive brake shoes and pads, increase of electrical braking), the study focuses on a device collecting at source airborne particles issued from trains brake systems. A groove pattern of braking pads has been designed with finite element distortion analysis, air flow circuit optimisation and tested on a braking bench equipped with sensors to characterise the particles emitted and the braking performances under standardised conditions. Above 70% reduction of emissions has been noted. A suburban train bogie has then been equipped to evaluate the reliability and maintainability of the device on commercial service conditions.
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