North Car Denied That The Train Had Been Cracked Due To Cracks In The Axle, And Recalled The Train &Nbsp, Calling The Equipment Very Sensitive.

The 54 train of Beijing-Shanghai high-speed railway of North Vehicle group recalled and overhauled at the same time.

Yesterday, Caixin net disclosed that only half a month after the official launch, the high-speed rail train found unknown cracks at the key power shaft.

An inspection report of the Ji'nan depot EMU in July 15th showed that the CRH380BL high-speed rail train, numbered 6209L, was detected by ultrasonic wave. It was found that the axle of the eleventh carriages was near the gear, and there was a crack of 7.1 millimeters long.

Axle is the key component to connect the train wheelset, which is very important to train safety.

If the power shaft has defects of 2 millimeters or more than 2 millimeters, it will meet the scrapping standard of the Ministry of railways.

If not scrapped, continue to use may cause vehicle axle broken, derailment and subversion.

When the high-speed rail train operates at a speed of 300 kilometers per hour, the power shaft will be out of order at any time.

In this regard, the north car group technical staff explained that the crack report is too sensitive detection device caused by "virtual detection."

In July, the Ministry of Railways held a special meeting to study the parameters. Finally, the parameters were adjusted, the damage criteria of the flaw detection system were unified, and the inspection work was re trained.

"Since the formal operation, the CRH380BL train has not changed one axle. If there are cracks, it will not be able to carry it. It can't be just an accident like a parking accident or a delay."

The technician said.

At present, the domestic high-speed EMU axle supply is highly monopolized, and the only supplier is Chi Chi Railway Equipment Co., Ltd.

"Chi Chi's complete introduction is the technology of Italy Lu Qi Ni company, the product quality is still quite excellent."

North Vehicle sources revealed that the Beijing Shanghai motor vehicle flaw detector was manufactured in Germany, which is not necessarily compatible with the axle production system in Italy.

There are three measures for recall maintenance, one is the sub supplier.

At present, the top software experts from SIEMENS are working with North vehicle to patch up the software of train network control system to meet the actual operation needs of Beijing-Shanghai high-speed railway.

"If the Beijing-Shanghai high-speed railway run before the official operation, the running time will be longer, so that the problem will be fully exposed, and it will not cause the present passive."

One professional said.

News link

Four pairs of moving trains added between Beijing and Shanghai

In August 28th, the second phase of the national railway will be implemented.

From August 24th onwards

Since September 1st, 4 pairs of trains have been added to the existing Beijing Shanghai line, and the running time of some trains has slowed down after the Beijing Guangzhou line.

Shanghai to Beijing South 1 pairs, D314/3 times; Shanghai to Beijing Railway Station 2 pairs, are D312/1 times, D322/1 times; Beijing south to Nanjing South 1 pairs, D350/349 times.

After the second time adjustment, the operation time of most EMU trains in the northeast and Guangzhou will be extended, and the fares will also be reduced accordingly.