INA working principle of the oil film bearing - bearing knowledge

INA oil film bearing is a kind of lubricating oil as lubricating medium radial sliding bearing, its working principle is: in the process of rolling, due to the effect of rolling force, force the roller shaft neck, INA oil film bearing center and the center of the shaft neck produce eccentric, make INA gaps between oil film bearing and shaft neck shape into two areas, one is called divergence area ( Direction of rotation clearance increases gradually along the axis neck) And the other one is called convergence zone ( Along the shaft neck rotation direction decreases) 。 When the rotating shaft neck have viscosity of lubricating oil from the & # 54225; Scattered area into the convergence area, along the shaft neck rotation bearing clearance from large to small, form a kind of oil wedge, the lubricating oil pressure. The oil film pressure along the rolling direction of each point in the resultant force is INA bearing capacity of oil film bearing. When rolling force is greater than the bearing capacity, the journal center and the increase of eccentricity between the center of the oil film bearing in INA. In the convergent zone along the axial bearing clearance steepening neck rotation direction, the minimum oil film thickness decreases, the pressure inside the oil film and bearing capacity, and rolling force balance, journal center no longer offset, INA oil film bearing and shaft neck completely separated by a lubricating oil in theory formed the whole fluid lubrication. From the working principle of the oil film bearing in INA can know INA oil film bearing system is one of the most important parameters in the minimum oil film thickness. If the minimum oil film thickness value is too small, and the metal impurity particles in the lubricating oil is too large, the shape of metal particles size on the numerical value is greater than the minimum oil film thickness, the metal particles as lubricating oil through the minimum oil film thickness, like metal contact, serious when will burn. In addition if the minimum oil film thickness value is too small, when there is a pile of the accidents such as steel, it is easy to cause shaft neck and INA tile burning resulted from the oil film bearing metal contact. INA with the size of the minimum oil film thickness value of oil film bearing structure size and material, the related parts machining precision and installation precision of the system of the oil film bearing in INA, lubricating oil and the size of the rolling force and so on.