For the design of the reducer, the general housing and the outer ring of the bearing adopt a clearance fit. During the operation of the bearing, the direction of the force is fixed, and mainly bears the reaction force generated by the meshing between the gears. If the circumferential direction of the bearing outer ring is always fixed, the force will always act on a fixed point of the outer ring of the bearing, which is more likely to cause metal fatigue and reduce the service life of the bearing. In theory, during the actual operation, the outer ring of the bearing is allowed to rotate slowly within a certain period of time. This can effectively prevent the reaction force from always acting on a certain point of the outer ring and delay the fatigue wear of the bearing.
Through the analysis of the design theory, it is considered that this is one of the most fundamental causes of the bearing chamber wear of the reducer. Because there will always be deviations between theory and practice, there will be uncertainty in the design, manufacturing and assembly. It is difficult to effectively ensure the clearance between the bearing chamber of the reducer and the outer ring of the bearing, and it is difficult to ensure that the outer ring of the bearing rotates one revolution. cycle. Therefore, the length of time that the outer ring of the bearing rotates for one week will directly determine the service life of the bearing chamber.
However, the actual application of the outer ring rotation cycle cannot be guaranteed.
Firstly, the common techniques and techniques are analyzed. The common methods are insert bushing, pitting, surfacing, brush plating, thermal spraying, laser cladding, etc. These repair processes are emerging while promoting technological process improvement and development. It is also limited by complex process conditions and on-site environment, especially in the face of equipment problems such as sudden emergencies, large equipment, and complicated disassembly. These processes are obviously more than enough. The way of bushing and pitting is a very old method of shaft repair, which has poor repair effect and is rarely used at present.
At present, more sophisticated processes, such as Sole carbon nano-polymer materials, are repaired using material technology.
On-site quick repair reducer bearing chamber application case
(1) The surface of the bearing chamber of the reducer is oiled and polished to reveal the primary color of the metal.
(2) The surface was washed with absolute ethanol, and the Sole carbon nano-polymer material SD7101H was adjusted in proportion.
(3) The material to be tempered is scraped with a sample ruler.
(4) Heating and solidifying the material with a iodine tungsten lamp to improve material properties.
Selection of Process Technology from Wear Analysis of Reducer Bearing Room
2019 06/03