Slewing bearings and bearings, there are rolling body and with raceway rings, but it is compared with the ordinary rolling bearings, there are many differences, mainly the following:
①Slewing bearings are larger in size, its diameter is usually in the 0.4-10 meters, and there are some as large as 40 meters in diameter.
②Slewing bearing generally have to withstand several aspects of the load, not only to withstand the axial force, radial force, but also to withstand a large overturning moment. Therefore, a set of slewing bearing often play the role of several sets of ordinary rolling bearings.
3 slewing bearing running speed is low, usually below 50 rpm. In many occasions, the slewing bearing does not make continuous operation, but only in the angle of back and forth rotation, equivalent to the so-called "swing bearing".
4 in the material and heat treatment and other manufacturing process, slewing bearing and rolling bearing has a big difference.
5 Usually, the slewing bearing is equipped with a toothed ring for rotary drive and a sealing device for dust prevention.
6 different mounting methods, the slewing bearing is not like ordinary bearings set on the mandrel and mounted in the bearing box, but screws are used to fix it on the upper and lower supports.
Slewing bearing is the basic parts of mechanical equipment, in the national economy in various industries is very widely used, the product is widely used in engineering machinery, port machinery, metallurgical machinery, mining machinery, petroleum machinery, chemical machinery, medical equipment, shipping machinery, light industry machinery, environmental protection machinery, recreational equipment, transportation machinery and military equipment and other industries. Now the slewing bearing is more and more used in energy saving and environmental protection projects, such as wind turbines need a variety of precision pole slewing bearing supporting.