Cooling aeraulics device for a rail vehicle element and corresponding rail vehicle

Patent metadata

Field	Value
Publication number	US-9925990-B2
Application number	US-201514958745-A
Country	US
Kind code	B2
Filing date	Dec 3, 2015
Priority date	Dec 3, 2014
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A cooling aeraulics device is for cooling an element of a rail vehicle. The aeraulics device is designed to be placed on a roof of the rail vehicle and includes a conduit, which extends substantially longitudinally in relation to the rail vehicle. The conduit includes, successively, a front portion equipped with a front opening for the intake of air, a central portion, in which is housed the element to be cooled, and a rear portion, equipped with a rear opening for the discharge of exhaust air. A surface of a transverse cross-section of the conduit evolves, from the front opening to the rear opening, so as to generate an acceleration of the flow of air in the conduit through the Venturi effect.

First claim

What is claimed is:

1. An aeraulic device for cooling an element of a rail vehicle, the aeraulic device being configured to be placed on a roof of said rail vehicle such that said conduit extends longitudinally in relation to said rail vehicle, said aeraulic device comprising
a main conduit; and
a secondary conduit which extends parallel to the main conduit,
said main conduit comprising successively a front portion, equipped with a front opening for air intake, a central portion, in which is housed said element to be cooled, and a rear portion, equipped with a rear opening for air discharge,
wherein a surface of a transverse cross-section of the main conduit evolves, from the front opening to the rear opening, so as to generate an acceleration of the flow of air in the conduit by means of a Venturi effect,
wherein the secondary conduit comprises a front part, equipped with a front orifice for air intake, a central part, and a rear part, equipped with a rear orifice for air discharge, and
wherein a surface of a transverse cross section of the secondary conduit evolves from the front orifice to the rear orifice of the secondary conduit so as to generate turbulences promoting the acceleration of the flow of air in the main conduit.

2. The aeraulic device according to claim 1 , in which the surface of the transverse cross section of the central portion of the said main conduit is lower than the surface of the transverse cross section of the front portion of the said main conduit.

3. The aeraulic device according to claim 2 , in which the surface of the transverse cross section of the central portion of the said main conduit is lower than the surface of the transverse cross section of the rear portion of the said main conduit.

4. The aeraulic device according to claim 1 , in which the front and rear openings of the said main conduit are arranged transversely to a longitudinal axis of the railway vehicle.

5. The aeraulic device according to claim 1 , in which the secondary conduit and the main conduit are connected to one another by a passage that permits circulation of air, the passage extending between the central portion of said main conduit and the central part of said secondary conduit, the disturbances promoting the acceleration of the flow of air in the central portion of the main conduit.

6. The aeraulic device according to claim 1 , in which the central part of the secondary conduit is equipped with at least one deflector generating turbulences in the flow of air circulating into the secondary conduit.

7. The aeraulic device according to claim 6 , in which the deflector is borne by a top surface of the central part of the secondary conduit and protrudes out in the central part of the secondary conduit.

8. The aeraulic device according to claim 7 , in which the deflector is a rod or a plate.

9. A rail vehicle comprising an element to be cooled, wherein said rail vehicle has a aeraulic device according to claim 1 , for cooling said element to be cooled, the aeraulic device being fixed on a roof of the rail vehicle such that one axis of the main conduit extends parallel to a longitudinal axis of the rail vehicle.

Assignees

• Alstom Transp Tech

Inventors

• Nicolau Sébastien
• Cornu Denis

Classifications

• B60H1/00328

  of the liquid-air type · CPC title

• B61D27/009

  Means for ventilating only (ventilation in general F24F) · CPC title

• B61C17/04 Primary

  Arrangement or disposition of driving cabins, footplates or engine rooms; Ventilation thereof (driving cabins and accessories B61D) · CPC title

• B61D27/0072 Primary

  Means for cooling only (cooling in general F25) · CPC title

• B60H1/00385

  for vehicles having an electrical drive, e.g. hybrid or fuel cell · CPC title