INA oil film bearing is a radial sliding bearing with lubricating oil as the lubricating medium. Its working principle is: during the rolling process, due to the rolling force, the roller journal is forced to move, INA oil film bearing center and shaft The center of the neck is eccentric, so that the gap between the INA oil film bearing and the journal forms two regions, one is called the divergent zone (the gap gradually increases along the direction of the journal rotation), and the other is called the convergence zone (the direction of rotation along the journal) slowing shrieking). When the rotating journal brings the viscosity of the lubricating oil from the dispersing zone into the convergent zone, the bearing clearance changes from large to small along the direction of the journal rotation, forming an oil wedge to generate pressure in the lubricating oil. The combined force of the pressure at each point in the oil film along the rolling direction is the bearing capacity of the INA oil film bearing. When the rolling force is greater than the bearing capacity, the eccentricity between the center of the journal and the center of the INA oil film bearing increases. In the asymmetry zone, the
bearing clearance becomes steeper along the direction of rotation of the journal, the minimum oil film thickness becomes smaller, the pressure inside the oil film becomes larger, the bearing capacity becomes larger, and the bearing center is not balanced, the center of the journal is no longer offset, and the INA oil film The bearing and the journal are completely separated by the lubricating oil, which theoretically forms a full fluid lubrication.
From the working principle of INA oil film bearings, one of the most important parameters in the INA oil film bearing system is the minimum oil film thickness. If the minimum oil film thickness value is too small, and the metal impurity particles in the lubricating oil are too large, and the outer size of the metal particles is numerically larger than the minimum oil film thickness, the metal particles accompany the lubricating oil through the minimum oil film thickness as if causing metal contact. When it is serious, it will burn tiles. In addition, if the minimum oil film thickness value is too small, when there is an accident such as steel pile, it is easy to cause metal contact between the journal and the INA oil film bearing to cause burnt tile. The minimum oil film thickness value is related to the structural size and material of the INA oil film bearing, the machining accuracy of the related parts, the mounting accuracy of the INA oil film bearing system, the size of the lubricating oil and the rolling force. How INA oil film bearings work
[Chinese bearing net] 4/6/2011 Author: China Bearing Network
INA oil film bearing is a radial sliding bearing with lubricating oil as the lubricating medium. Its working principle is: during the rolling process, due to the rolling force, the roller journal is forced to move, INA oil film bearing center and shaft The center of the neck is eccentric, so that the gap between the INA oil film bearing and the journal forms two regions, one is called the divergent zone (the gap gradually increases along the direction of the journal rotation), and the other is called the convergence zone (the direction of rotation along the journal) slowing shrieking). When the rotating journal brings the viscosity of the lubricating oil from the dispersing zone into the convergent zone, the bearing clearance changes from large to small along the direction of the journal rotation, forming an oil wedge to generate pressure in the lubricating oil. The combined force of the pressure at each point in the oil film along the rolling direction is the bearing capacity of the INA oil film bearing. When the rolling force is greater than the bearing capacity, the eccentricity between the center of the journal and the center of the INA oil film bearing increases. In the asymmetry zone, the bearing clearance becomes steeper along the direction of rotation of the journal, the minimum oil film thickness becomes smaller, the pressure inside the oil film becomes larger, the bearing capacity becomes larger, and the bearing center is not balanced, the center of the journal is no longer offset, and the INA oil film The
bearing and the journal are completely separated by the lubricating oil, which theoretically forms a full fluid lubrication.
From the working principle of INA oil film bearings, one of the most important parameters in the INA oil film bearing system is the minimum oil film thickness. If the minimum oil film thickness value is too small, and the metal impurity particles in the lubricating oil are too large, and the outer size of the metal particles is numerically larger than the minimum oil film thickness, the metal particles accompany the lubricating oil through the minimum oil film thickness as if causing metal contact. When it is serious, it will burn tiles. In addition, if the minimum oil film thickness value is too small, when there is an accident such as steel pile, it is easy to cause metal contact between the journal and the INA oil film bearing to cause burnt tile. The minimum oil film thickness value is related to the structural size and material of the INA oil film bearing, the machining accuracy of the related parts, the mounting accuracy of the INA oil film bearing system, the size of the lubricating oil and the rolling force.
