As a type of bearing, slewing bearings are increasingly used in modern society. They are called "joints of machines" and are mainly used in: automobiles. Cranes, railway cranes, port cranes, ship cranes, metallurgical cranes, container cranes, excavators, filling machines, and CT machine standing wave therapy devices, navigation instruments, radar antenna bases, missile launchers, tanks, robots, and revolving restaurants, etc. etc. Mobei.com provides you with more bearing knowledge. The slewing bearing is a large bearing that can withstand comprehensive loads. It can withstand large axial and radial loads and overturning moments at the same time.
The slewing bearing is a new type of mechanical component that has gradually emerged around the world in the past forty years. It consists of inner and outer rings, rolling elements, etc. The slewing bearings produced in my country were mainly made of machinery in the early 1980s. The Ministry of Industry designated Tianjin Engineering Machinery Research Institute to organize the introduction of the design and manufacturing technology of the former Federal German Rothe Erde Company. On December 20, 1984, the standards of the Ministry of Machinery Industry of the People's Republic of China and the People's Republic of China were released: JB/2300-84 "Slewing Bearing Types, Basic Parameters and Technical Requirements", mainly by the Tianjin Engineering Machinery Research Institute of the Ministry of Machinery and Electronics Industry, Xuzhou Hailin Slewing Bearing Factory was responsible for the drafting. Later, the country released the construction machinery standard: JB36.1-36.3-91 in 1991. In 1999 and 2011, it released new machinery industry standards JB/2300-1999 and JB/2300. -2011.
Slewing support bearings generally have mounting holes, internal gears or external gears, lubricating oil holes and sealing devices, which enable the host to be compact in design, easy to guide and easy to maintain. Slewing ring bearings include toothless, externally toothed and internally toothed four-point contact ball bearings, double-row angular contact ball bearings, crossed cylindrical roller bearings, crossed tapered roller bearings and three-row cylindrical roller composite bearings. series, in which four-point contact ball bearings have high static load capacity, crossed cylindrical rollers have high dynamic load capacity, and the pre-interference of crossed tapered roller bearings can make the bearings have greater support rigidity and rotation accuracy. Three-row cylindrical roller combined bearings have the characteristics of making the main engine more compact due to the increase in load-bearing capacity leading to higher bearing height. Various forces are borne by different raceways, so under the same force, the bearing diameter can be greatly reduced. A slewing bearing with high load carrying capacity. Slewing support bearings are widely used in large slewing devices of hoisting machinery, mining machinery, construction machinery, port machinery, ship machinery, and high-precision radar machinery and missile launchers. At the same time, we can also design, develop and produce various special structure slewing bearings according to the specific requirements of users.