Shandong Xinkaite Bearing Co.,Ltd.
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Three major factors and maintenance methods of deep groove ball bearing failure
Clicks:16687 Date:12-5
1 contact fatigue failure
Contact fatigue failure refers to the failure of the deep groove ball bearing working surface to be subjected to alternating stress. Contact fatigue spalling in sliding deep groove ball bearing the work surface, often accompanied by fatigue crack, first from the contact surface following the maximum alternating shear stress, and then extended to the surface to form different flake shapes, such as dot peeling or pitting corrosion, stripping shallow spalling into flake. Due to the gradual expansion of the flaking surface, it tends to expand to the deep, forming deep exfoliation. Deep exfoliation is the fatigue source of contact fatigue failure.
2 gap change failure
Deep groove ball bearing in the work, due to the influence of external or internal factors, makes the original matching gap change, the accuracy is reduced, and even cause "bite to death", called the gap change failure. External factors such as interference volume are too large, installation is not in place, temperature expansion caused by expansion and instantaneous overload, internal factors such as residual austenite and residual stress in unstable state are all the main reasons for the failure of clearance.
3 wear failure
Wear failure refers to the failure of the relative sliding friction between the surface of the surface leading to the continuous wear of the working surface of the metal. Constant wear will cause deep groove ball bearing parts to be damaged gradually, and eventually lead to the loss of dimensional accuracy of sliding deep groove ball bearing and other related problems. Wear may affect the shape change, increased clearance and surface morphology changes may affect the lubricant or it reaches a certain level of pollution caused by lubrication complete loss of function, so that the deep groove ball bearing the loss of rotational accuracy and not normal operation. Wear failure is one of the common failure modes of all kinds of deep groove ball bearing, which can be divided into the most common abrasive wear and adhesion wear in the form of wear.
First of all, the structural design is reasonable at the same time with the advanced nature, will have a longer deep groove ball bearing life. The manufacturing of deep groove ball bearing generally passes through forging, heat treatment, turning, grinding and assembly. The rationality, progressiveness and stability of each processing technology will also affect the life of deep groove ball bearing. The process of heat treatment and grinding that affects the quality of finished products deep groove ball bearing is more directly related to the failure of deep groove ball bearing. Deep groove ball bearing has studied the surface deterioration layer of deep groove ball bearing in recent years, indicating that the grinding process is closely related to the surface quality of deep groove ball bearing.
The metallurgical quality of the deep groove ball bearing material was once the main factor affecting the early failure of the rolling deep groove ball bearing. With the progress of Metallurgical Technology (such as vacuum degassing of deep groove ball bearing steel), the quality of raw materials has been improved. The proportion of raw material quality in the failure analysis of deep groove ball bearing has decreased significantly, deep groove ball bearing, but it is still one of the main factors affecting the failure of deep groove ball.
In order to better play the best condition of deep groove ball bearing, the choice of deep groove ball bearing is directly related to the stable operation of the equipment. The selection of deep groove ball bearing grease must be taken into consideration in the following aspects:
1. antirust property
Antirust agents are best insoluble in water. Oil should have good adhesion, and the oil used in deep groove ball bearing must have antirust effect. And a layer of oil film can be formed on the surface of the steel.
2. mechanical stability
Cause leaks. In normal operation, the oil will be softened in mechanical processing. The oil will be flung from the deep groove ball bearing seat to the deep groove ball bearing. If the mechanical stability of the grease is not enough, during the operation, the structure of the soap will be mechanically disintegrated, resulting in the destruction of grease and the loss of lubrication.
3. oil seal
During the operation of deep groove ball bearing, the oil seal is a necessary barrier to maintain deep groove ball bearing and lubricants from external pollution. No matter or moisture can penetrate into the deep groove ball bearing, in order to prevent damage to them. The correct device later played deep groove ball bearing the most important factors of long service life. At the same time, it is necessary to pay attention to the cleanliness of the deep groove ball bearing, the correctness of the deep groove ball bearing selection, and the selection of appropriate device and maintenance tools. In addition, deep groove ball bearing must be prevented from contaminant and wet air pollution and ensure that it is properly installed and lubricated. Type of lubricants and lubrication cycle design, the deep groove ball bearing oil column condition, as well as specialized Yang are important and plays the same role.
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