Why is your bearing failure and the failure reason

Why is your bearing failure and the failure reason 1. Contact fatigue failure of contact fatigue failure refers to the bearing working surface under the role of alternating stress and failure. High temperature bearing bearing lubrication method, divided into grease lubrication and oil lubrication. In order to make the bearing function well, first of all, to choose suitable conditions, using the method the purpose of lubrication. If only think about lubrication and oil lubrication. However, grease lubrication can simplify the structure of bearing the surrounding of the special features, compare grease lubrication and oil lubrication of interests. Contact fatigue spalling attacks in bearing working surface, often accompanied by fatigue crack, first from the contact surface of the maximum cyclic shear stress produced, and then extended to the surface composition of different flake shape, such as dot to pitting corrosion or pitting spalling, peel into small sheet according to the shallow flaking. Due to the expansion of peeling off surface gradually, and often to expand deep, deep spalling. Deep spalling is contact fatigue failure of fatigue source. 2. Bearing clearance change failure bearing in the work, because of the influence of external or internal factors make the original fit clearance changes, accuracy is reduced, and even; Bite dead; Referred to as the clearance change failure. , large amount of the external factors such as interference of installation does not reach the designated position, provoked the shrinkage temperature, instantaneous overload, etc. , the internal factors such as residual austenite and the residual stress in a state of flux and so on all is a clearance change main reason of failure. 3. Fracture bearing bearing failure of main failure reason are two essential defects and overload. When fracture loads beyond material strength limit, constitute parts called overload fracture. Overload causes mainly main engine faults or improper installation. Bearing parts of micro crack, shrinkage cavity, bubbles and large foreign impurities, overheating organizations and local burns and other defects in the impact overload or violent vibration provoked at will, in the defect fracture, referred to as a defect fracture. It should be pointed out that the bearing in the process of manufacture, the raw material) Incoming the reinspection, forging and heat treatment quality control, process control can be through the correct analysis instrument can, this is still necessary to strengthen the control in the future. But general speaking, usually the bearing failure of most of overload failure. 4. The wear failure wear ( A basic type of component failure) Failure refers to the relative sliding friction between the surface from the working surface of metal wear caused by the failure from time to time. Continue to wear will provoke bearing parts damaged, gradually and eventually cause bearing dimensional accuracy ( Accuracy) Loss and other related problems. Wear may affect the appearance change, the increase of fit clearance and working surface morphology change, may affect the lubricant or the pollution reached a certain degree of lubrication function loss in good condition, so that loss of bearing rotating accuracy and will not operate properly. Wear failure is one of the common failure mode of all kinds of bearings, according to the usual wear can be divided into one of the most common of abrasive wear and adhesive wear. Abrasive wear ( A basic type of component failure) Refers to the imported bearings bearings between surface into the external hard work hard foreign body or abrasive dust on the surface of the metal particles or relative movement and the contact surface and wear make up, tend to form furrows in the bearing working surface scratch. Hard particles or other foreign body may come from inside the host, or from the host system adjacent parts sent by lubricating medium bearing inside. Adhesive wear refers to the because of the friction surface microscopic bumps or foreign bodies make the friction surface is uneven, serious deterioration, the condition of lubrication for local friction heat production, easy to form local deformation and friction surface friction welded phenomenon, serious when surface metal may be partial condensation ( Definition: the changing process of substances from solid to liquid) Force, the contact surface from the local friction welding points on the matrix will be torn and increase the plastic deformation. This kind of adhesive tearing adhesive cycle constitutes the adhesive wear and ordinary, subtle adhesive wear is called a scratch, serious adhesive wear called occlusion. A: under the influence of bearing wear and tear is the reason why a: use forklift needle roller bearing! Its role and pay attention to matters