Scientific rambling
In recent years, China's shield machine industry has made great progress and continues to challenge the international advanced level. In this process, the main bearing, as one of the key components of the shield machine, has attracted much attention in its development. China Railway Construction Heavy Industry Group Co., Ltd. (hereinafter referred to as China Railway Construction Heavy Industry) in the second industrial park of Changsha, Hunan Province, through independent innovation to overcome the key technical problems of main bearing manufacturing, injected new impetus into the development of China's shield machine industry.
The main bearing, the "heart" component of the EPBM, is subjected to extreme working conditions and enormous workloads. The stability and reliability of its performance is critical to the operation of the EPBM. However, due to the special working conditions and huge size of the shield machine, the development of the main bearing has always been a technical problem.
The first challenge in the development of the main bearing was material selection and design. Because the main bearing needs to bear huge loads and complex working environments, its materials must have the characteristics of high strength, high wear resistance and high corrosion resistance. In addition, the design of the structure of the main bearing also needs to take into account the stress distribution and variation under various operating conditions to ensure its performance and reliability.
After the material and design have been determined, the fabrication of the main bearing is also a challenging task. The size of the main bearings is usually very large, with diameters of several meters, and the flatness and straightness are extremely high, and the machining accuracy is required to be in the micron range. This puts forward extremely high requirements for processing equipment and technology, and requires advanced processing technology and equipment to ensure the machining quality and accuracy of the main bearing.
In addition, the test of the main bearing is also an indispensable part of the development process. The test not only needs to verify the performance and reliability of the main bearing, but also needs to simulate the actual application of various working conditions and environments to ensure that the main bearing can operate stably and reliably in actual work. The process of testing needs to consider a variety of factors, including load, speed, temperature, lubrication, etc., to ensure that the performance of the main bearing meets the design requirements.
China Railway Construction Heavy Industry Co., Ltd. has made a series of important breakthroughs in the development of main bearings. First of all, in terms of materials and design, they made full use of advanced technology and experience at home and abroad, combined with the actual needs of China's shield machine industry, and selected suitable materials and design schemes. Secondly, in the manufacturing process, they have introduced advanced processing equipment and technology to improve the machining accuracy and quality of the main bearing. Finally, in terms of testing, they established a complete test system, simulated various working conditions and environments, and verified the performance and reliability of the main bearing.
Through independent innovation and research, China Railway Construction Heavy Industry Co., Ltd. has successfully developed a diameter of 8The 61-meter main bearing of the shield machine realizes the fully autonomous and controllable main bearing. This not only provides a strong support for the development of China's shield machine industry, but also provides a new impetus for the high-end manufacturing of China's manufacturing industry to the world.
In addition to the development of main bearings, China Railway Construction Heavy Industry has also made important progress in digital transformation. They innovatively launched the digital twin system of the shield machine, which provides real-time operational decision support for technicians by collecting engineering construction data in real time and conducting system analysis, improving the operation efficiency and safety of the shield machine.
The development of the main bearing is an important step in the development of China's shield machine industry, and it is also the embodiment of the high-end manufacturing strength of China's manufacturing industry. Through independent innovation and research, China Railway Construction Heavy Industry Co., Ltd. has successfully developed the main bearing, which has injected new vitality into the development of China's shield machine industry and provided new impetus for the high-end manufacturing of China's manufacturing industry to the world. It is believed that with the continuous development and growth of China's shield machine industry, the high-end manufacturing strength of China's manufacturing industry will continue to improve and make greater contributions to the development of the world's manufacturing industry.