Composite Oilless Bimetal Bearing Bush Custom Made

Product Description

Product Description

Oil film bearing is a radial sliding bearing that uses lubricating oil as the lubricating medium. Its working principle is: during the rolling process, due to the action of rolling force, the roller shaft journal is forced to move, and the center of the oil film bearing and the center of the journal are eccentric, forming two areas between the oil film bearing and the journal. One is called the divergent area (the gap gradually increases along the direction of journal rotation), Another one is called the convergence zone (gradually decreasing along the direction of rotation of the axis). When the rotating journal brings viscous lubricating oil from the divergent zone into the convergent zone, the bearing clearance decreases along the direction of rotation of the journal, forming an oil wedge that generates pressure inside the lubricating oil.

The load-bearing oil film, also known as the pressure oil film, plays a role in balancing the load, isolating the shaft neck and sleeve, converting solid friction between metals into molecular friction inside the liquid, and minimizing friction and wear. Therefore, it can meet the requirements of load-bearing pressure, impact resistance, change speed, rolling accuracy, structural dimensions, and service life within the maximum range.
Matching the four elements of rolling pressure, rolling speed, bearing clearance, and lubricating oil viscosity to form an uninterrupted and stable load-bearing oil film, achieving liquid dynamic lubrication to meet the friction and lubrication of the rolling mill under different operating conditions. Therefore, lubrication of oil film bearings often manifests in the following three forms:
1. When starting or stopping, although there is lubricating oil between the shaft and bearings, due to the motion speed being equal to or approaching zero, fluid dynamic pressure lubrication has not yet formed or gradually disappeared, and the shaft and bearings will inevitably come into direct contact. At this time, it is in a state of edge medium lubrication or even semi dry friction.
2.During rolling mill operation, mixed lubrication may occur due to vibration, excessive water ingress, insufficient oil supply, or oil quality issues.
3.When the rolling mill operates normally and smoothly, it exhibits fluid lubrication.

Therefore, the lubrication characteristics of oil film bearings are a mixed lubrication that alternates among the three situations mentioned above.

Product Parameters

Parameter	Value
Type	Bushing
Material Quality	Babbitt Alloy, Copper Alloy
Structural	Full round liner
Application	Rolling Mill
Diameter	95MM - 600MM
Working Temperature	-40ºC - +120ºC

 

Detailed Photos