High temperature bearing common bearing failure modes and mechanism were reviewed

High temperature bearing common bearing failure modes and mechanism of 1. Contact fatigue failure of contact fatigue failure refers to the bearing work appearance by the effect of alternating stress and failure. Bearing contact fatigue spalling attacks work in appearance, often also along with fatigue crack, first from the contact appearance under large cyclic shear stress, and then extended to constitute different flake shape, appearance 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 deep extension, { TodayHot} A deep spalling. Deep spalling is contact fatigue failure of fatigue source. 2. Wear failure wear failure refers to the relative sliding friction between the appearance from the work appearance of metal wear from time to time. Continue to wear will make up the damage of bearing parts gradually, and eventually cause bearing size accuracy loss and other related problems. Wear may affect the appearance change, the increase of fit clearance and morphology change work appearance, may affect the smooth agent or allow its pollution to reach a certain level to form a smooth function complete loss, so the loss of high temperature bearing rotating precision and will not operate properly. Wear failure is one of the common failure forms of all kinds of bearings, according to the usual wear can be divided into common of abrasive wear and adhesive wear. Abrasive wear refers to the bearing between work looks into foreign solid particles or hard foreign bodies or metal surface grindings and relatively move and provoked wear contact appearance, often working in bearing appearance furrows of scratch. Hard particles or other foreign body may come from inside the host, or from the host system adjacent parts sent to bearing internal by smooth medium. Adhesive wear refers to the appearance of microscopic bumps because of friction or foreign bodies make the friction surface is uneven, serious deterioration, the condition of smooth because of some friction heat production, easy to form a friction surface of micro welding deformation and friction phenomenon, serious when metal appearance may be part of the condensation, contact surface reaction will be part of the friction welding point increases with torn from the matrix 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. 3. Failure of bearing failure of main reason are the two main factors to defects and overload. When the loads beyond the ultimate strength and fracture forming parts called information overload fracture. Overload causes mainly main engine trouble or improper installation. Bearing parts of micro crack, shrinkage cavity, bubbles, large foreign sundry, overheating and part of 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 manufacturing, the original data of the factory reinspection, forging and heat treatment quality control, process control can be through instrument analysis ability, this right is still essential to enhance control in the future. But general speaking, usually the bearing failure of most of overload failure. The previous: grinding heat can cause high temperature failure reason analysis of tapered roller bearing next article: bearing high temperature and high speed smooth fat performance characteristics