 |
bearing for mining |
10,22,2016 |
|
bearing in mining |
10,22,2016 |
|
bearing of mining |
10,22,2016 |
|
mining bearing |
10,22,2016 |
|
mining bearing |
10,22,2016 |
|
mining bearing |
10,22,2016 |
|
bearing for mining drum |
10,21,2016 |
|
bearing for mining drum |
10,21,2016 |
|
bearing for mining drum pulley |
10,21,2016 |
|
bearing for mining pulley |
10,21,2016 |
|
| Current Location：Home
- News |
Reason full complement cylindrical roller bearings Injury
|
| Time：2016.09.14 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
|
In general, the proper use of full complement cylindrical roller bearings, the fatigue life can be achieved. But early damage if an accident occurs, it can no longer use. With different fatigue life, this early injury is called a fault or an accident. More due to the installation, use, consider the lubrication on the ill from outside intrusion of foreign matter or the shaft, bearing insufficient research.
Full complement cylindrical roller bearings such as roller bearing damage state of the ring wall abrasions, which may be due to lack of lubricant, grade unsuitable for oil discharge structure defects, foreign invasion, SKF bearing misalignment or shaft the deflection is too large, there may be caused by the reasons mentioned integrated.
Thus, the survey only bearing damage, it is difficult to know the real cause of injury. However, if you fully understand the use bearing machines, basic working conditions and its peripheral structure, clarify the situation before and after the failure, combined with the damage of bearings and a variety of reasons related to the analysis, it is possible to prevent similar failures again. Bearing Injury representative and Countermeasures.
Even with the highest levels of modern manufacturing technology and processing full complement cylindrical roller bearing parts. Observe the readings with the pretension load variation method. Preload method has its negative aspects, it is well known. Always keep the look of their work will dial gauge against the head end or the appropriate parts of the bearing shaft.
1. Mechanical damage
Serious when the contact occurred metal outer peel and the emergence of a large area of messy scratch; under normal circumstances, SKF bearing alloy mechanical damage refers to the appearance of the bush there are different levels of grooves. The contact surface damage and erosion phenomena exist the main cause mechanical damage is bearing full complement cylindrical roller bearings look difficult to form a film or film was severely damaged.
2. bearing cavitation
Repeated action outside surface plastic deformation and work hardening, full complement cylindrical roller bearing impact load in the cylinder pressure). Partial loss of deformation capacity, and gradually form a pattern and continues to expand, and then with debris shedding, Loaded outer surface to form a hole. General bearing cavitation occurs, first appeared a pit, and then gradually expand this pit and cause cracking of the alloy layer interface crack propagation along a direction parallel to the interface until peeling up. The main reason SKF bearing cavitation is due to the oil sump hole and other structural elements of the cross section caused by a sudden change in oil flow strong disorders, disorders of the oil flow vacuum zone to form bubbles, and then generate Cavitation due to the pressure increases, the bubble collapse. Cavitation occurs in high load bearing areas, such as under the pad on the crankshaft main bearings.
First, the structure has a rational design along with advanced, it will have a longer bearing life. Bearing manufacturing generally through forging, heat treatment, turning, grinding and assembly of multi-channel processing. The reasonableness of the processing technology, advanced, stability will also affect the bearing life. Which affect the quality of products bearing heat treatment and grinding processes, often have a more direct relationship with the failure of the bearing. In recent years, research on the bearing surface metamorphic layer showed that the grinding process is closely related to the bearing surface quality.
Full complement cylindrical roller bearing materials, metallurgical quality was the main factor in the impact of early bearing failure. As metallurgical techniques (such as bearing steel vacuum degassing, etc.) progress, raw material quality is improved. Raw material quality factors in the full complement cylindrical roller bearing failure analysis of the proportion has decreased significantly, but it is still one of the main factors SKF bearing failure. The selection is still appropriate factors bearing failure analysis must be considered.
|
|
|
