| 摘要 |
The wheel assembly comprises a wheel having an axis X-X′ and a system for braking the wheel. A fan is arranged in the space of the wheel in order to draw in the flow of hot air (8) which is from the braking system and which is produced during the braking of the wheel. The rotor (14) of the fan is formed by a hub (20) and a plurality of blades (22) which rotate about an axis (X-X′), the rotor (14) being arranged in an air circulation channel (50) which is formed in the space of the wheel so that an operational clearance (56) is provided between a wall (54) of the air circulation channel (50) and the radial ends of the rotor (14). The rotor (14) of the fan comprises a rotating collar (24) which is arranged at the outer radial end of the blades (22), and the operational clearance (56) is provided between the wall (54) of the air circulation channel (50) and the collar (24).
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