The basic model of SKF tapered roller bearing failure form is introduced

Developed on the basis of the SKF bearing tapered roller bearing, its working principle is based on rolling friction instead of sliding friction, generally by two ring, a set of rolling elements and a cage of strong commonality, a high degree of standardization, seriation of mechanical components. Because of various machinery has different working conditions, on bearing load capacity, structure, and puts forward various requirements in such aspects as the use of performance. To this end, bearing, all kinds of structure are required. However, the most basic structure is composed of inner ring and outer ring, rolling element and cage. 1. Contact fatigue, Fatigue wear) Failure of contact fatigue failure is all kinds of taper roller bearing is one of the most common failure mode, is contact stress of the bearing surface by cycle repeatedly function failure. SKF bearing parts surface contact fatigue spalling is a fatigue crack in the process of crack initiation and extension. Initial contact fatigue crack first from the maximum orthogonal shearing stress under contact surface, and then extended to form a hemp dot spalling or small exfoliate, the former is called pitting corrosion or pitting peeling; The latter is called the shallow flaking. Such as the initial crack on the border of hardening layer and the core area, caused the early spalling of hardening layer, it is called a hardening layer peeling off. 2. Adhesive and abrasive wear failure is one of the most common failure modes of all kinds of bearing surface. SKF bearing parts between the relative sliding friction causes the surface of the metal loss known as sliding friction losses. Continue to wear will make the parts size and shape change, tapered roller bearing fit clearance increases, working surface morphology becomes bad, thus loss of rotating accuracy, bearing cannot work normally. Sliding wear forms can be divided into the abrasive wear, adhesive wear and corrosive wear and fretting wear, etc. , one of the most common for abrasive wear and adhesive wear. Tapered roller bearing parts of the friction surface between the friction caused by external grinding hard particles or metal surface wear phenomenon belongs to the abrasive wear. For bearings, inner ring and shaft tight fit, and with the shaft running, outer ring and bearing seat or mechanical shell usually blastholes transition fit, the supporting role. However, in some cases, also have outer ring, inner ring fixed supporting role or inner ring and outer ring are running at the same time. For SKF bearing, and shaft tight said shaft and joined the sports circle, cooperate with or mechanical bearing shell blastholes transition said seat and a supporting role. Rolling body ( Steel ball, roller, or needle) Usually use within the bearing cage evenly arranged between the two ring rolling movement, it directly influences the shape, size and number of tapered roller bearing load capacity and performance. Cage outside roller can be evenly separated, also can guide roller rotating and improve internal bearing lubrication performance, and so on.