Judging the basis of "can continue to apply after the correction of imported bearings"
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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>The basis for judging whether "Importable bearing can be used continuously after correction" Judging the basis of "can continue to apply after the correction of imported bearings"
If it is found to have the following shortcomings, it can no longer be used; it is necessary to replace the new bearing: /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
1. There are cracks or notches on either the inner ring, the outer ring, the roll body, or the holder.
2. Persistence of the rack wear is significant, perhaps the rivet is significantly relaxed.
3. There is significant creep on the inner diameter surface of the inner ring or the outer diameter surface of the outer ring. There is crack on any one of the ferrule and the rolling body. The raceway surface and the tumbling body have rust;
4. There are significant jams on the rolling track, ribs and roll.
5. There are severe indentations and marks on the raceway surface and the rolling body.
6. Bearings sealed with smooth grease; damage to the seal or dust cover is significant.
7. The color change due to heat is significant.
Most of the bearing damage is caused by many loads beyond the original estimate; non-useful seals, bearing gaps caused by tight cooperation, etc. Any of these elements have their special damage patterns and will remain Special damage marks. Thus; inspection of damaged bearings; in most cases can be found to be able to lead; bearing sales professors believe that one-third of one-way bearing damage is caused by fatigue damage; other three points One is due to poor smoothness; the other third is due to contamination of the contaminant into the bearing or equipment disposal.
However, these types of damage are also related to industrial types. For example, the pulp and paper industry is mostly caused by poor smoothness or contamination to form bearing damage rather than data fatigue.
The so-called bearing burn injury condition refers to: the raceway wheel of the bearing, the rolling body and the holding frame are heated rapidly during the rotation until discoloration, softening, welding and damage.
Secondly, it can be too large load (pre-pressure is too large). The rotation speed is too large. The clearance is too small. There is water or other foreign matter intrusion. If the above two conditions are not the case, the accuracy of the shaft and bearing housing is poor, the shaft The deflection is large. See here; buyers may want to know how to deal with it; first; to discuss smoothing agent and smooth method; choose the right bearing smoothing agent; and its dosage; and to correct the selection of bearings. Clearance and preloading; and improved sealing equipment. View the accuracy of the shaft and bearing housing.
1. Removal of the bearing: When disassembling the lower bearing for inspection; firstly record the appearance of the bearing; recognize the residual amount of the smoothing agent; after sampling and seeing the smoothing agent; wash the bearing. Generally use gasoline, fire oil as a scavenger.
Removal of the removed bearing; coarse removal and fine removal; do not leave in the container; first put the metal mesh bottom; make the bearing not directly touch the container's dirt. When coarse removal; if the bearing is rotated with dirt It will damage the rolling surface of the bearing; it should be paid attention to. In the coarse oil removal; use the brush to remove the smooth grease, adhesive; after cleaning; turn into the fine wash, fine wash; the imported bearing is rotated while removing the oil Carefully remove. Others; always remove the oil and keep it clean.
2. Inspection and discriminating of the bearing: In order to judge whether the disassembled bearing can be used; to check after the imported bearing is cleaned. Check the condition of the raceway surface, the rolling surface, the cooperation surface, the wear condition of the bracket, and the one-way The addition of bearing clearance and damage with irrelevant scale accuracy; abnormal. Non-detached small ball bearings; use one hand to support the inner ring horizontal; rotating outer ring to recognize whether it can flow.
3, bearing protection: in order to maintain the original function of the bearing in an outstanding condition for a long time; must be protected, repaired, in order to prevent accidents; ensure the reliability of work; improve productivity and economy.
Operational specifications for protecting the most appropriate mechanical working conditions; timed. Contents include supervision of working conditions, compensation or replacement of smoothing agents, inspection of timed disassembly, maintenance work during work; rotation of one-way bearing, oscillation, temperature, The condition of the smoothing agent, etc.
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