| 摘要 |
A liquid-cooled brake disc comprises a central stationary aluminium cooling plate (14) with an internal chamber (17) for the circulation of water or other liquid coolant, and a series of cast iron sectors (20) mounted on opposite sides of the plate for contact by conventional brake friction material carried by discs on a shaft to be braked (not shown). The cooling plate (14) and sectors (20) are separated by thin air gaps (22) or other thermally insulative layers. In use the sectors (20) have sufficient thermal capacity to store the heat generated by a braking event over a relatively short period, and this heat is then transferred to the coolant over a relatively longer period at a rate determined by the conductance of the air gaps. In particular this form of construction can absorb and dissipate the heat of braking without bulk boiling of the coolant. |
