By heating fag bearing or bearing seat, the installation method of Damage During changing tight fit into loose fit by thermal expansion. It is a common and labor-saving installation method. This method is suitable for the installation of fag bearing with large interference.
Before hot installation, put the ferrule of fag bearing or separable fag bearing into the oil tank and heat it evenly for 80-100 ℃, then take it out of the oil and install it on the shaft as soon as possible. In order to prevent the end face of inner ring and shaft shoulder from not fitting tightly after cooling, FAG bearing can be tightened axially after cooling.
When the fag bearing outer ring is tightly matched with the light metal bearing seat, the hot installation method of heating the fag bearing seat can avoid the scratch of the mating surface. When heating fag bearing with oil tank, there should be a mesh grid at a certain distance from the bottom of the box, or hang the bearing with hook.
Fag bearing cannot be placed on the bottom of the box to prevent sinking impurities from entering the bearing or uneven heating. There must be a thermometer in the oil tank, and the oil Damage During temperature must be strictly controlled not to exceed 100 ℃, so as to prevent tempering effect and reduce the hardness of ferrule.
Even if invisible smile dust enters fag bearing, it will increase bearing wear, vibration and noise.
2、 Use appropriate and accurate installation tools
Try to use special tools and try to avoid using things such as cloth Damage During and short fiber.
3、 Use and install carefully
It is not allowed to punch with force, directly knock fag bearing with hammer, and transfer pressure through rolling element.
4、 Prevent corrosion of fag bearing
When taking fag bearings directly Damage During by hand, fully wash the sweat from your hands and apply high-quality mineral oil before operation. Pay special attention to rust prevention in rainy season and summer.
especially under light load. These special operating conditions are Damage During the surface damage that may be caused when the rolling surface (track and rolling parts) is effectively separated and limited by a lubricating oil film. In fact, under ideal conditions, the so-called permanent bearing life is possible.
The service life of rolling fag bearing is expressed in revolutions (or hours of working at a certain speed). Definition: the bearing within this service life shall have preliminary fatigue damage Damage During (peeling or defect) on any bearing ring or rolling element.
However, no matter in laboratory test or in actual use, it can be Damage During clearly seen that the appearance of fag bearing under the same working conditions is the same, and the actual service life is very different. In addition, there are several different definitions of fag bearing “life”, one of which is the so-called “working life”,
which means that the actual life of a fag bearing before damage is caused by wear and damage, which is usually not caused by fatigue, but by wear, corrosion, seal damage and other reasons.
Most fag bearings are damaged for many reasons – exceeding the original estimated load, ineffective sealing, too small bearing Damage During clearance caused by too tight fit, etc. Any of these factors has its special damage type and will leave special damage traces.
Therefore, by examining the damaged bearing, we can find the possible causes in most cases. Generally speaking, one third of the fag bearing damage is due to fatigue damage, the other third is due to poor lubrication, and the other third is due to pollutants entering the fag bearing or improper installation and treatment.