China's high-speed rail started later than some developed countries. Before the high-speed rails were all German or Japanese standards, China's self-developed EMU train "Revival" used a lot of technical standards such as China's national standards and China Railway Corporation's corporate standards. Among the 254 important standards of the EMU, the Chinese standard accounts for 84%, which is a real “Made in Chinaâ€. Nowadays, many technologies adopted by the “Revival†have led the world stage!
Only use 10 years to overcome the problem of high-speed rail world, at least half of the timeThe core component of the "gearbox" was born in a factory in Changzhou, Jiangsu. Fan Shuai of the Gear Division enters the workshop every day. First, the dirt on the sole must be cleaned to meet the dustfall requirements.
The workers referred to this special workshop as a "smart assembly line", which was included in the assembly process of the gearbox. At this most important point, the assembly of components has extremely high requirements for temperature and humidity. An increase in humidity caused by a rain can affect the reliability of components.
The reason why it is called "smart assembly line" is because each link is controlled by data. The wrench in the hands of the workers will output the torque according to the computer settings, so that the tension of each bolt can reach the first-class precision. When the green light is on, the worker is prompted to perform the operation, and if a certain link does not match the instruction, the system will record the alarm in time.
The gearbox is the core component that drives the "Revival" EMUs at high speeds, with an extended service life of 24 years and 24 million kilometers, which is equivalent to 600 laps around the earth. The material, sealing and aging resistance of the parts are all difficult to test.
Some foreign technicians have said that for twenty or thirty years, this can be very powerful. What foreign experts did not think was that China had overcome this technical difficulty in just 10 years. It has been used on a large scale in the "Revival" and currently accounts for 80% of the domestic market share. The last "current stream" in China's high-speed railway system will be replaced.
Condensed for generations of unremitting effortsIn the eyes of the railwayers, the advent of China's high-speed rail is not a sudden spring breeze. Among them, several generations of people have worked tirelessly. In the intelligent assembly workshop, a press is pressing the bearing into the center of the gear in the most primitive way. The experimental results show that only with this method, the combination of gear and bearing is more reliable and durable.
In this way of assembly, a small set of parts will be scrapped. At the beginning of the independent research and development, millions of expensive alloy parts will be burned with the failure of the experiment, and everyone is under great psychological pressure.
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