Large Axial Load in a Flat Bearing

When carrying a large axial load in a flat bearing, a number of collars are provided to decrease the intensity of pressure. This is the correct answer because collars act as a means to distribute the load over a larger surface area, reducing the pressure exerted on the bearing. Let's delve into the details of why this is the case.

Frictional Torque in a Flat Bearing

Before discussing the role of collars, it is important to understand the concept of frictional torque in a flat bearing. Frictional torque refers to the resistance encountered when there is relative motion or an attempt to move between two surfaces in contact. In a flat bearing, frictional torque is generated due to the friction between the bearing surfaces.

Collars and Pressure Distribution

Collars are cylindrical rings that are placed on the shaft of a bearing. They serve to modify the contact pressure distribution and mitigate the effects of high pressure on the bearing surfaces. Here's how collars achieve this:

1. Increased Surface Area: By providing a number of collars, the contact surface area between the bearing and the load-carrying components is increased. This distribution of load over a larger surface area helps to reduce the intensity of pressure on the bearing.

2. Load Distribution: The collars help to distribute the axial load evenly across the bearing. By preventing the load from being concentrated on a single point, the collars minimize the risk of excessive pressure that could lead to premature wear or failure of the bearing.

3. Reduced Friction: The increased surface area and load distribution provided by the collars also help to reduce friction between the bearing surfaces. This reduction in frictional torque results in smoother operation and improved efficiency of the bearing.

Conclusion

In summary, when carrying a large axial load in a flat bearing, the use of collars is essential to decrease the intensity of pressure. Collars increase the contact surface area, distribute the load evenly, and reduce frictional torque. These factors contribute to the longevity and reliability of the bearing by minimizing the risk of excessive pressure and wear.