RAIL COOLING METHOD AND RAIL COOLING DEVICE

摘要

In order to achieve the purpose of making the mechanical characteristic values of a rail foot section in the width direction uniform, a rail cooling device that jets coolant onto a rail and force cools same, jets the coolant, during cooling of a rail foot rear section, onto the foot rear section of the rail, from a porous plate nozzle (5b) having smaller nozzle holes (51a) in the end sections in the width direction (Y) than the nozzle holes (51b) in the center section in the width direction (Y), and the cooling capacity at the end sections of the rail foot rear section in the width direction is made weaker than the cooling capacity at the center section of the rail foot rear section in the width direction. As a result, the flow rate of the coolant at the end sections of the rail foot rear section in the width direction is suppressed, so the difference in cooling speed between the end sections and the center section of the foot section in the width direction can be reduced, and the mechanical characteristic values of the rail foot section in the width direction can be made uniform.