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April 7th, 2014, 05:47 PM   #1
Joined: Apr 2014
From: zVibxt

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The destruction of the rolling bearing form explanation

Rolling imported bearing in the process of operation, if appear the phenomenon of abnormal heat, vibration and noise suddenly increased, showed that rolling bearing import may have

damage, should be timely check and analyze the reasons. Common failure modes are:
1, the fatigue spalling
In rolling bearing raceway or imports roller surface, as a result of the action of alternating load under the contact surface of a metal flake peeling, and gradually expand to form pits. If continue to operate, it will form the area of

spalling. Due to improper installation or bearing hole and shaft centerline tilt reason will make local area under high load in the bearing fatigue damage.
2, crack and fracture
Material defects and improper heat treatment, combined with interference quantity is too large, combination, improper design, such as supporting surface groove and cause stress concentration and so on, to form a ring cracks and fracture.
3, indentation
When external hard material into the bearing, and the pressure between the rolling element and raceway, can make the roll surface indentation. In addition, excessive impact load can make contact surface local plastic deformation and form

pits. Even when the bearing static load is small, due to the vibration of the surrounding environment will also be in roll forming uniform distribution of pits.
4, wear and tear
When the rolling bearing seal is bad, make the dust or particulate matter into the bearings, or poor lubrication, serious abrasion or wear will cause the contact surface, and makes the bearing vibration and noise increased.
5, current corrosion
Current through bearings, electric spark that will produce little, cause the contact surface of partial annealing and appear small pit or black spot. Severe cases into the pits will appear larger.
6, rust
Such as water or acid, alkali, salt material bearing lubricant or improper selection will reference bearing corrosion, precision bearing even slight corrosion will make the bearing damaged.
7, the damage of cage
Rolling bearing, especially high-speed bearing, due to the lack of lubricant, making maintains contact with the roller or ring wear, impact, and even lead to maintain the frame fracture.
Bearing dustproof sealing ring
Seal imports bearing's life largely depends on its sealing performance, are now commonly used imported bearing seal for folding frame, it usually open cover installation, main disadvantage is that: elastic strength is poor, assembly

performance is not good, poor sealing performance.
Imported bearing dust seal structure of hooked edge, compared with the existing technology has the following advantages:
Sealed performance is good,Bearings Of BEST high strength of the seal, the reason for the skeleton hooked edge structure is effective to increase the flexibility of sealing ring, the maximum compensation the threaded size spread bad influence, it not

only depends on the seal elastomer of elasticity, the effects of the elasticity and strength and edge structure, raised the qualification rate capping, and can machine pressure, effective pressure.
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