The slewing bearing can withstand the mechanical radial force, axial force and bearing capacity, which can better and guarantee the operation of the machine. It is widely used in large reversing equipment such as lifting and transporting machinery, mining machinery, construction machinery, port machinery, wind power generation, medical equipment, radar and missile launchers. So, is it necessary to take time to remove impurities on the surface of the slewing bearing? The editor will give you an answer today.
There will be a seal on the outside of the slewing bearing. On the one hand, it can prevent the filled grease from leaking out, and on the other hand, it is to prevent external dust, impurities and water from entering the inside of the bearing and affecting its normal operation. In order to better avoid the damage of the slewing bearing, the appearance of the slewing bearing should be removed frequently during the installation and use, which can extend its service life and reduce the damage of the slewing bearing.
In use, the surface impurities of the slewing bearing should be removed frequently, and the sealing strips of the slewing bearing should be checked for aging, cracking, damage or separation. If one of these conditions occurs, the sealing strips should be replaced in time to avoid debris and lubrication in the raceway. For the loss of grease, the corresponding grease should be changed after replacement to avoid jamming or rusting of the rolling body and raceway.
Slewing bearing cracking refers to the failure and cracking of the inner and outer rings of this type of bearing, mainly due to the unqualified values of the tensile strength, yield strength and impact toughness of the material. When the slewing bearing is working under the normal operating temperature (-30°C---70°C), cracking occurs, and it can be affirmed that the raw material problem accounts for the dui element. Another possibility is that the raceway needs to be heat treated during the production and processing of the reversal bearing. The heat treatment fails, resulting in a low surface hardness. The hardness layer deepens the inside of the turntable bearing structure or reaches the reversing support wall, so that the mechanical properties of the raw materials of the inner and outer rings of the reversal bearing will occur. Change, the overall tensile strength and impact toughness value of the material become smaller, and the material becomes brittle; the design structure problem, after heat treatment, the quenched layer is equal to the design thickness of the inner and outer rings, at this time the material tensile strength and impact toughness value are small, resulting in cracks . However, this possibility does not account for a high proportion of cracking incidents. Therefore, we generally believe that the main reason for the cracking of the slewing bearing (reverse bearing) is the use of unqualified ring forgings.
