Slewing bearing manufacturers take you to learn more about shield machine bearings
Slewing bearing manufacturers take you to learn more about shield machine bearings
The shield machine is a kind of engineering machinery specially used for tunnel excavation construction. It can complete the construction procedures such as excavation, support, and slag discharge, and carry out continuous operations. Tunnel construction equipment for assembly line operations. Known as "construction machinery", its technical level is an important indicator of a country's underground construction equipment manufacturing level. When Western shield machine technology has been developed for more than a hundred years, China has not had a shield machine produced by itself. After more than 10 years of exploration and research and development, China's shield technology has gradually come to the forefront of the world. At present, it not only meets 90% of the domestic market demand, but also develops the international market, accounting for 1/3 of the global market share.
The main bearing, known as the "heart" of the full-section tunnel boring machine (referred to as "shield machine"), bears the main load during the operation of the shield machine and is a key component of the cutter head drive system. The working environment is very harsh . Since the shield machine will face various complex strata during the excavation process, the main bearing of the shield machine must bear high-speed rotation, huge load and strong temperature rise.
Due to the high technical content, the main bearing is the most valuable among all parts of the roadheader. In a given construction section, if the main bearing of the shield machine fails, it is extremely difficult or even impossible to carry out on-site repair or replacement (the equipment needs to be dug out from the ground). This requires the main bearings to be free of any failures.
As the main bearing of the cutter head of the shield machine, it bears the heavy responsibility of leading the battle and breaking the sword and fire. So, Why is it being called the "heart" of a shield machine as the main bearing?
First of all, it bears the main load during the operation of the shield machine and is an important core and key component of the main bearing of the cutter head drive system. The shield machine faces complex geological soil layers during the tunneling process, such as pebbles, composite geology, muddy water geology, rocks, and even mixed bodies. The main bearing needs to withstand large thrust, large torque, large impact, high-speed rotation, huge load and strong temperature. Lift. In this case, reflecting the stability of the main bearing of the cutter head is the key to overriding all technical indicators.
Therefore, the main bearing of the cutter head of the shield machine requires a large amount of data to support the high technical content, complex manufacturing process, high performance requirements of raw materials, complex heat treatment, manufacturing process exploration, and the application and practical feedback of the trial-produced cutter head main bearing. The breakthrough in the core components of the main bearing of the domestic shield machine is reflected in four aspects, the material, heat treatment, manufacturing process and feedback are stable and reliable.
Luoyang Heng Guan Bearing has been committed to the design and manufacturing key technology research of the main bearing, breaking through the key design of the main bearing of the shield machine, the material and heat treatment of the main bearing of the shield machine, the precision machining and testing of the main bearing of the shield machine, etc. The machine provides safe and reliable slewing bearings.
