Rotary bearing - - - - The basic architecture of slewing bearing

Rotary bearing - - - - Rotary bearing structure of the basic - 2018 09 - 08 I believe that many users in the selection of rotary bearing for the first time, will be some confusion, so many structure which used well, which is more suitable for their own actual demands. Now we begin to cognitive rotary bearing structure exactly what are the structure and the characteristics of the application. The first - - - - Single row four-point contact ball type single row four-point contact ball bearing slewing bearing is composed of two seat, compact structure, light weight, rolls four point contact ball and circular arc, can withstand the axial force and radial force and overturning moment. Rotary conveyor, welding manipulator, small and medium-sized crane and excavators and other construction machinery are optional. The second - - - - Single cross roller type single row cross roller slewing bearing, is composed of two seat, compact structure, light weight, the manufacture of high precision, small assembly clearance, the installation accuracy requirement is high, the roller of 1:1 cross arranged, can bear larger axial force and radial force and overturning moment. Is widely used in hoisting, transportation, engineering machinery and military products. The third - - - - - - - - - - - - - - - - - - - Double row, double row ball type double row or double row ball slewing bearing has three seat, steel ball and isolation block can be directly discharged into rolling up and down, according to the stress state, arranged up and down two different or the same steel ball diameter, arc raceway bearing Angle are up and down for 90 & deg; And can bear a large axial force and overturning moment. When the radial force is greater than zero. Axial force of the double raceway must be specially designed. Slewing bearing pairs of axial and radial size is larger, solid structure, especially suitable for the requirements above medium diameter of tower crane, truck crane loading and unloading machinery, etc. The fourth - - - - Three row roller type three row roller slewing bearing has three seat, and the radial raceway separate from top to bottom, to make each row roller load can be exactly determined, can carry a variety of load, at the same time is more than four kinds of products in one of the biggest bearing capacity, axial and radial size larger firm structure, especially suitable for the requirements of large diameter heavy machinery, such as bucket wheel excavators, wheeled cranes, deck cranes, ladle rotation, and a large tonnage crane machinery, etc. The fifth - - - - Column column joint type ball joint type eccentric rotary bearing small, long service life, has the advantages of the dual structure of roller and ball at the same time, suitable for large axial load, the overturning moment, the life requirement of the high and continuous operation of the host. Such as power plants, ports open material material piling and taking machine and other equipment. The above is the five track structure of slewing bearing, the rotary bearing the vast majority are on the market now these types, there are not special mark, such as inside and outside two orbitals application on the theme park and so on. Slewing bearing is not static, can be customized according to customer requirements. （ Source: WeChat public number 'xuzhou slewing bearing slewing drives and accessories)