What are the consequences of improper assembly of water pump bearings

Incorrect assembly will reduce the service life of the bearing

 Failure to pay attention to the correct installation of the impeller, fan, coupling and clutch will increase the working load of the bearing. Generally speaking, the tension of the water pump belt on the bearing shaft and the gravity of the coupling will act on half of the circumference of the outer ring channel, causing the contact area to decrease. Because of the connection between rotation and load, the shaft channel is affected by the entire circumference. During the assembly process, if the assembly parts cause eccentricity on the contact surface, an unbalanced load will be generated. If there is an angle, the eccentric part will tilt and sway during rotation, generating torque, and the angle may also cause unbalanced load of centrifugation. All centrifugal and rotary loads rotating on the shaft are not fixed in direction. This situation, if it is serious, will change the load distribution of the channel, causing the shaft to form a point contact and act on any position of 360 degrees on the outer ring channel. This load is proportional to the square of the rotation speed. Other situations are when the radial force on one end of the roller is too large and the axial force on the ball end is large. This situation leads to the misalignment of the cage and the extrusion of lubricant and increases the operating temperature of the bearing. At the same time, due to the corresponding increase in the load of each row of rolling elements, the fatigue life of the L10 bearing is shortened. In extreme cases, the unbalance and swing load may be so great that it reaches the strength limit of the shaft material. Power reversal may cause fine cracks on the hardened surface. If this situation continues, cracks will propagate to the entire shaft, causing the shaft to fracture, usually with serious consequences.