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Effect of KOYO bearing cage data on bearing operation
Source: Bearing network time: 2013-03-04
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2) Because the cage accepts repeated stretching and tightening stress; therefore, the demand has high fatigue strength, necessary elasticity and resistance, and resistance to centrifugal force.
3) The cage is light in weight; the data with low density is used; so that the conflict of KOYO bearings is lost.
4) Plastic processing and cutting processing functions are outstanding, with satisfactory rigidity and harmony.
5) The coefficient of conflict between the ferrule and the roll is small.
6) Chemically stable; not easy to rust.
(2) Additional requirements for cage data 1) Moisture on the outside; that is, it can attach or store smoothing agents,
2) good thermal conductivity; fast heat dissipation, large heat capacity; heat resistance,
3) It has a certain ability to absorb vibration; it is not easy to resonate with other parts;
4) It is not easy to generate noise.
(3) Special requirements for cage data 1) Where it is necessary to have corrosion resistance; because the cage does not require extra high hardness; austenitic stainless steel can be used; and 0Cr18Ni9 steel is used most.
2) in high temperature applications; also use austenitic stainless steel with satisfactory high temperature strength,
3) When the unique demand improves the strength of the cage; it can use the low carbon steel plate for carbonitriding external treatment,
4) Under the condition that the demand is self-smooth; the graphite steel cage can be used; or the porous material capable of storing oil can be used to make the cage.
5) When working in a magnetic field; sometimes the demand data does not disturb the external magnetic.
Bearing temperature; generally can be estimated according to the external temperature of the bearing housing. But the oil hole is used to directly measure the temperature of the outer ring of KOYO bearing. The bearing temperature is gradually increased from the beginning of the operation; generally the temperature is stable after 1~2 hours. If it is a bearing The equipment is bad; the temperature will rise sharply; the abnormal temperature will be abnormal. The reasons are such as excessive smoothing agent, too small KOYO bearing clearance, poor equipment, excessive conflict of sealing equipment, etc. High-speed rotation; fault selection of bearing layout and smoothing method Etc. is also the reason.
The rotation of KOYO bearing is viewed with a stethoscope, etc.; there are strong metal noise, abnormal sounds, irregular sounds, etc. to clarify the abnormality. The reason is poor smoothness, poor accuracy of shaft or bearing housing, bearing damage, foreign matter intrusion, etc.
1. Corrugated surface corrosion: Spectral analysis found that the concentration of non-ferrous metal elements is abnormal. The sub-micron-scale wear particles of many non-ferrous metal components are present in the iron spectrum, and the smooth oil moisture overruns and acid value overruns.
2, the external appearance of the journal: There are iron-based cutting abrasive black oxide particles in the iron spectrum, and there is tempering color on the metal surface.
3, the outer surface of the journal corrosion: spectral analysis found that the concentration of iron is abnormal, the iron spectrum has many iron submicron particles, smooth oil moisture overrun or acid value overrun.
4, external strain: found in the iron spectrum cutting abrasive particles, abrasive particles are non-ferrous metals.
5, fretting wear behind the tile: spectral analysis found that the iron concentration is abnormal, there are many iron components in the iron spectrum sub-micron wear particles, smooth oil moisture and acid value is abnormal.
Under the condition of smooth liquid, the sliding surface is separated by smooth oil without direct touch, and the collision loss and appearance wear can be greatly reduced. The oil film also has a certain vibration absorption ability.
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