FIELD: process engineering.
SUBSTANCE: proposed device comprises first and second coolers and control unit. First cooler cools down rail head. Second cooler cools down rail web. Control unit controls said first and second coolers. First cooler comprises rail head temperature meter and first ejector unit to eject first coolant to rail head. Second cooler comprises rail web temperature meter and second ejector unit to eject first coolant to rail web. Control unit varies types, flow rates and feed rates of the first and second coolants in cooling rail head and web.
EFFECT: higher fatigue strength.
10 cl, 10 dwg, 2 tbl, 3 ex
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