A: the working principle of the oil film bearing seat - bearing knowledge

Oil film bearing is a kind of to smooth smooth oil as medium radial sliding bearing, the principle of its task is: in the process of rolling, due to the effect of rolling force, force the roller shaft neck appear to move, the oil film bearing centre of gravity is fair with the journal's center of gravity, the oil film bearing clearance between shaft neck and make up the two areas, one is called divergence area ( Along the shaft neck rotation direction gradually become bigger space) And the other one is called convergence zone ( Along the shaft neck rotation direction gradually decrease) 。 When the rotating shaft neck of smooth with viscosity oil from divergence to convergence area, along the shaft neck rotation bearing clearance from large to small, form a kind of oil wedge, make smooth in the oil pressure. The oil film pressure along the rolling direction of each point in the resultant force is the bearing capacity of the oil film bearing. When rolling force is greater than the bearing capacity of shaft center of gravity and fair distance increases between the oil film bearing center of gravity. 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, until and rolling force to reach equilibrium, the journal center of gravity are no longer offset, the oil film bearing and shaft neck whole separated by a smooth oil actually constitutes the whole fluid is smooth. From the task of the oil film bearing principle can know that the oil film bearing pieces in one of the most important parameter is the minimum oil film thickness. If the minimum oil film thickness value is too small, and smooth metal impurity particles in oil is too large, the shape of metal particles size on value is greater than the minimum oil film thickness, the metal particles with smooth oil after the minimum oil film thickness, like metal contact formation, serious when will burn. In addition if the minimum oil film thickness value is too small, when display steel pile accident, very easy to form shaft neck and the metal contact of the oil film bearing tile burning. The size of the minimum oil film thickness value and the structure of the oil film bearing size and data, the coherent parts processing precision and the oil film bearing fragmentary installation accuracy, smooth oil and the size of the rolling force and so on.