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Why is the heat transfer oil circulation pump close to the motor bearing that is simply damaged?
Source: China Bearing Network Time: 2018-06-24
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The bearing is a wearing part; improper use causes damage to the bearing. The cause of the bearing is faulty and its disposal. Overload overload. This is the reason; as tired as working.
Incurs premature exhaustion; (including over-tightening; cloth hardness dents and preloads) early fatigue failure. Overloading forms a touch stress beyond the allowable value.
Cut the load or draw from the beginning - if the system is constantly overloaded; can try to choose the bearing from the beginning, the system short-term overload and impact load; can try to improve the smooth, special treatment of the bearing and other disposal.
2. Overheating is an embodiment. Just like "fever."
The omen is the raceway; the ball and cage are discolored; from gold to blue - mild smoothing agent discoloration; or even attached to raceways or rollers. Heavy bearing components are blue-discolored. Heavy bearing components attack metal activity .
The temperature exceeds 400F to anneal the raceway and roll data - this is the effect of high temperature on the mechanical function of the bearing.
The decrease in hardness leads to a decrease in bearing load and early failure - the bearing raceway or roller hardness is lower than HRC58; the life expectancy will decrease.
Severe conditions lead to deformation; other temperature rise and damage smooth function - the conclusion is: the bearing must have a smooth running agent above the running viscosity, the temperature rise will reduce the viscosity of the smoothing agent; and even affect its fundamental chemical function.
3. Cloth hardness dent "true Brinell indentation".
Attack occurs when the load exceeds the elastic limit of the raceway - usually formed by radial impact loads.
Incidents on the raceway add oscillation (noise)
Any static overload and severe impact on the cloth dent - such damage usually remains in the indentation.
4. Pseudo-cloth dent "false Brinell indentation".
Elliptical wear dents in each ball orientation; smooth; there is a significant gap; there is no grinding around - the shape is not always. Such damage usually has no grinding marks in the indentation.
Marking severe external oscillations - not sure?
Vibration isolation and application of anti-friction additives - usually formed by flutter during transport.
5. Normal fatigue failure - fatigue damage.
Injury failure refers to the occurrence of fragmentation on the raceway and the rolling body; and the falling of the data fragments - including fatigue and fragmentation (see the hardened bearing steel) and fatigue (disappeared in carburized bearing steel).
This fatigue is a gradual attack; once it starts, it expands agilely; and with the addition of significant oscillations - the hardened steel is usually agilely enlarged; it simply forms instantaneous damage. The carburized steel will have a longer time to develop. Replace the bearing; Bearings with longer fatigue life - should be said to use higher additional dynamic load bearings, higher purity bearing steel, etc.
6. Reverse load - abnormal load.
The angular touch bearing is depicted only to withstand axial loads in one direction when the direction is reversed; the elliptical touch area of ​​the outer ring is flattened...
The result is stress addition; temperature rise; and increased oscillations and early bearing failures7. Pollution - is to say foreign matter; still a kind of foreign body: water?
Pollution is one of the main reasons for bearing failure. The warning of pollution is a little trace on the raceway and the tumbling surface; inducing oscillation and wear and sanitation; stuff; standard operation. Storage and transportation of new bearings.
8. Smooth oil failure - smooth failure.
The discoloration of the raceway and the roller (blue, brown) is a sign of smooth failure; the raceway, the roller and the cage are worn out; the overheating and severe problems are caused. - The early is the fine glass-shaped flaw on the raceway. Rolling bearing The normal operation depends on the existence of excellent oil film between the parts, the failure is often caused by the lack of smoothness and overheating - there may be faulty smoothness (too much smoothing agent, too little, too silk, too.è ¡ å¥ å¥ 6. å«Œ æ±€ (10) 笆 笆 笆 唬┠唬┠衷 è¡· è¡·.
9. Corrosion - a type of foreign matter entering; water.
The omen is to present a reddish-brown area in the raceway, roller, cage or other orientation - early rust color; usually black. The reason is that the bearing touches corrosive fluids and gases; in severe cases; corrosion causes early fatigue failure of the bearing; Corrosive fluids; use all sealed bearings as much as possible - sealed bearings are not preferred. Each bearing has its sealing system; the key is to make it useful.
10. Misaligned - eccentric.
The omission of misalignment is that the wear scar on the raceway is not parallel to the raceway margin. If it is misaligned, it will exceed 0. 001 in/in; it will cause abnormal temperature rise of the bearing and the bearing seat; and the bearing ball wear--the same bearing type There are different kinds of eccentric load. Usually, the aligning bearing has the best eccentric load. However, other bearings can achieve the intention of adding certain eccentric load after optimizing the raceway.
11. Loose cooperation - this damage is rare.
Collaborative loosening leads to relative movement of the cooperating parts; if this relative movement is subtle but not continuous; then seizure wear--referred to as "activity". This wear-off granules; and oxidized into a special brown. This leads to increased grinding and loosening. If the looseness increases to the obvious movement of the inner ring or the outer ring; the appearance of the device (aperture; outer diameter and side surface) will wear and heat; cause noise and sloshing.
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