At the end of the year, the Lanxin high-speed railway was opened across the three provinces of Gansu, Qinghai and Xinjiang.
The 1776-kilometer Lanxin high-speed rail has shortened the operating time from Urumqi to Lanzhou from 20 hours to more than 8 hours. But nature’s arrogant edges and corners on this railway line have created some huge problems for the galloping trains –
In 8 hours, high-speed trains not only have to survive the four major winds in the world, but more than 200 days in the year, more than 80 winds; more than the Tianshan Mountains, which have snow all the year round, have passed the unmanned smoke. The desert of Gobi; in the winter, it is minus 40 degrees Celsius, and the highest temperature in summer has risen to minus 40 degrees Celsius, and the temperature difference between winter and summer is as high as 80 degrees Celsius.
In such an environment, the high-speed motor car undoubtedly needs an extraordinary and strong "heart". How is this special "heart" made?
More than 65% of the sections of the Xinjiang section of the Lanxin Railway cross the wind zone, and the raging sand is the buster with the longest train life. In view of the relatively large wind and sand problem of Lanxin Line, the technical center of Yongji Motor Company thickened the seal by five millimeters; like the ductile iron, the normal minimum temperature is minus 25 degrees Celsius. The technical center of Yongji Motor Co. Environment, improve the low temperature detection performance to minus 50 degrees Celsius...
Shang Qianbo, an engineer at the Technical Center of Yuncheng Yongji Motor Co., Ltd., introduced nearly 300 technical breakthroughs to his colleagues for this special "heart". From the improvement of the cold resistance of the structural components of the motor to the sand-resistant treatment of the motor insulation system... almost every link needs to break through the routine.
"Fifty degrees Celsius, five millimeters", these need to be technically strong behind the subtle changes in numbers, and just seven years ago, China's largest motor vehicle traction device manufacturing base, developed electric drive systems for high-speed motor trains. Still just getting started.
"We didn't have the ability to develop independently. We had to take other people's drawings, and other people's craftsmanship and other people's standards for production." Ji Huigang, chief engineer of Yongji Electric Company, said.
Without independent intellectual property rights and research and development capabilities, the production process is completely controlled by the foreign party, and any process improvement must be approved by the foreign party. In his own factory, he is working for foreigners, and a group of unwilling Chinese engineers are beginning to challenge the world's most advanced technology. 300 engineers, 1,800 day and night, more than 300 kinds of test materials, 450 process tests, 12,000 km section test, Yongji Motor has traveled five or six years abroad for five or six years, breaking through the high-speed motor traction system. The core technology has completely independent intellectual property rights. The "China Heart" that is beating on the high-speed rail has finally realized the "Made in China" in the true sense.
Ji Huigang proudly said: "The current production process and standards are all made by ourselves. We can find suppliers to manufacture products according to our standards. We are leading the technology. This is the biggest change."
Today, Yongji Electric's products cover 11 types of high-speed EMUs, 7 types of high-power electric locomotives and various diesel locomotives operated by China Railway. The comprehensive performance indicators of these high-speed rail "hearts" can be compared with the world's advanced level. The cost is less than half of the imported products. What's more important is to get rid of the foreign technical restrictions. These Chinese engineers can dance long sleeves and develop a "Chinese heart" that is more suitable for this land.
Traction electric drive system is the "heart of high-speed rail", and the network control system is "the brain of high-speed rail". After seven years of exploration, China has finally let this "heart" and "brain" realize the creation of China with independent intellectual property rights. From the introduction of technology to the realization of localization, to independent innovation, Yongji Motor's "three-level jump" has also enabled China's high-speed rail equipment manufacturing to complete from the introduction of absorption to innovation and improvement, from struggling to catch up with the graceful turn.
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