Bearing failure analysis to improve the working surface reliability of the system engineering is an important part of the bearing (the bearing's working function in its specified loss, causing failure or not working as a phenomenon of failure is called (bearing failure can be divided according to their normal life) Failure and two early failures, mainly for the analysis of the causes of early failure of the bearing caused by pitting and fatigue and suggestions for improvement to improve the life and reliability of the imported bearings.

Bearing fatigue failure is a failure of the surface form, mainly manifested by fatigue crack initiation, expansion and fracture processes, and the long-term effects of load failure on the resulting metal. The crack is in two ways:

First: from the surface, this is the effect of the external load caused by the cyclical change of the contact stress during the rolling contact of the imported bearing due to the plastic deformation of the working surface and the strained surface of the strain hardened surface, and finally in the small crack from The development of the inner surface, the formation of surface cracks between the two, due to the intrusion of lubricant into the working surface, the open force, severely hit the wall, forcing the crack to advance;

Two: from the surface layer, under repeated pressure, the surface contact, initially cracked cracks at a certain depth in the exposed surface, and the angle along the surface direction, to a certain depth, from the surface of the contact surface, and beyond The surface, and eventually formed an eclipse, leaving a horse pit.

On the surface, or from the cracks in the surface layer, these two objectives (parts carburizing, quenching and other surface heat treatment, if there is uneven hardness, microstructure, and non-uniform internal stress and other disadvantages, the contact stress is generally Under the influence of the opposite underground crack, if the surface quality of the part is poor, there is a defect (oxidation, decarburization), friction or poor lubrication, from the surface crack.

Whether the bearing body of the bearing has noise, the left hand holds the bearing body sleeve of the bearing, and the right hand pushes the outer sleeve to rotate it to hear whether it has noise. Since most of the counterfeit products are out of production conditions and completely hand-worked, it is inevitable that impurities such as sand will be incorporated into the bearing body during the production process, so that noise will be generated when rotating. This is the biggest difference between a factory brand that strictly enforces production standards and operates with machines.

Whether there are turbid oil marks on the surface of the bearing, this should be paid special attention when purchasing bearings. Since the current domestic anti-rust technology is not particularly good at home, it is easy to leave a thick oil trace when the bearing body is rust-proof, and it is sticky on the hand, and almost no foreign original bearing can be seen. Traces of anti-rust oil, but particularly careful experts say that the bearing smells like a smell, it must be under the anti-rust oil, just can't see it.

Part of the bearing, usually its damage state is deformation, breakage, wear, deformation of the end face, wear of the concave surface / guide surface. In order to avoid damage to the cage, the installation method, load, rotation and temperature conditions should be carefully checked, and the vibration should be reduced. The lubricant and lubrication method should be changed. The inner and outer rings of the bearing are slightly inclined, and it can be preliminarily determined that it is installed or Caused when the bearing is removed. It is also a state of bearing damage and has a certain influence on the bearing. In order to avoid the existence of such a damage state, it is necessary to use proper work when installing or disassembling the bearing. To prevent the impact load, a punching machine can be used. The bearing is generally composed of an inner ring, an outer ring, a rolling element and a cage. The inner ring is mounted on the journal, and is called the shaft ring in the thrust bearing. The fit is tight; the outer ring is installed in the bearing hole of the base or the part, and the fit is usually loose. There are raceways on the inner and outer rings. When the inner and outer rings rotate relative to each other, the rolling elements will roll along the raceway. The role of the cage is to evenly separate the rolling elements.

Concerned about surprises

Label: Four reasons for the analysis of the cause of bearing surface fatigue failure

Previous: The main reason why hydraulic oil is the most likely to contaminate the hydraulic system Next: Detailed description of common faults and solutions for metering pumps

We have accumulated more than ten years' experience in r&d and production of Kitchen Knives. Such as forge handle knife, Stamped Knife , Plastic Handle Knife ,stainless Hollow Handle Knife, Ceramic Knife and so on . Look at these pictures. If you want to know more details about the Kitchen Knife , please click the pictures to view the style, specification, price and other informations .We have invested a lot of energy in creating quality, in order to provide high quality products for the market while establishing the brand image of the enterprise. At the same time, we are also good at OEM production. We have been producing products for many famous enterprises and brands in the world.

Kitchen Knife

Kitchen Knife,Chef Knife,Fruit Knife,Kitchen Knives

YangJiang Victory Kitchenware Products Co.,LTD. , https://www.victory-kitchenware.com