1. To reduce bending moment on shaft: When a coupling is located close to a bearing, the bending moment on the shaft is reduced. This is because the bearing provides support for the shaft, preventing it from bending excessively under the forces applied by the coupling.
2. To reduce vibration: Couplings can introduce vibration into a system, especially if they are misaligned or unbalanced. By locating the coupling near a bearing, the vibration can be dampened and prevented from propagating throughout the system.
3. To improve bearing performance: Bearings can be sensitive to misalignment and other factors that can cause premature wear. By locating the coupling close to the bearing, these factors can be minimized, helping to extend the life of the bearing.
4. For ease of maintenance: When a coupling is located near a bearing, it is easier to inspect, maintain, and replace. This is especially important for couplings that require periodic lubrication or adjustment.
5. To facilitate assembly: In some cases, it is easier to assemble a coupling to a shaft when it is located near a bearing. This is because the coupling can be supported by the bearing, making it easier to align and secure.
Overall, locating couplings near bearings provides several advantages in terms of reducing bending moment, vibration, and bearing wear, as well as improving bearing performance and facilitating assembly and maintenance.
