Research on Sensitivity Test Methods and Requirements of Brake for Single Heavy Feright Car and Heavy Haul Train
Heavy-duty freight cars are singly tested under the condition of 500 kPa brake pipe pressure in accordance with TG/CL 225 The Maintenance Rule of Railway Freight Car Brakes,which is inconsistent with the operating conditions of 600 kPa brake pipe pressure of heavy-duty trains.And for a train brake test with the composition up to 70 or above in accordance with TG/CL 113 The Operation and Maintenance Code of Railway Freight Cars,the brake pipe pressure reduction is 70 kPa in the test of sensitivity and pressure keeping,which is inconsistent with the 50 kPa of initial pressure reduction of locomotives braking,and with the operation strategy of Heavy haul trains such as Daqin line where the pressure reduction is mainly 50 kPa,there exists safety risk.Pointing at problems above,experimental investigations on the sensitivity tests of brake for single car and train were performed under the condition of 600 kPa brake pipe pressure,the regarding test methods and technical requirements were put forward for the purpose of the correspondence of test standards between the bench test on brake control valves,brake test on a single car and a train with the actual train operation.
heavy haul trainsingle car brake testtrain sensitivity test
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