About the service life of the pump shaft bearing

Water pump shaft bearing rotates in the load, because the ring raceway surface and rolling surface continuously by alternating load, even if the normal use conditions, will also make the raceway surface and rolling surface by material fatigue damage. Appear this kind of rolling fatigue damage before the total revolution called 'fatigue life of bearing. Due to the discrete material fatigue, even if the structure, size, material processing method is exactly the same bearing, rotates under the same conditions, the fatigue life of bearing also can appear bigger difference, so he will be a batch of the same bearing is placed under the same conditions, 90% of the bearing is not appear fatigue damage of the total number of turns is called 'the basic rating life of bearing. Bearing the basic dynamic load rating, the equivalent dynamic load and the relationship of basic rated life department such as type ( 1) 。 With time represents the bearing life such as type ( 2) 。 Life such as type (with walking distance said 3) 。 Do not pay attention to correct installation, fan impeller, shaft and the clutch, will enhance the bearing working load. In general, on the bearing shaft water pump belt tension rises and the shafts of the gravity effect on the general circumferential outer channel, the decrease of the contact area. Because of the connection between the rotating and load, axial channel is full circle. Assembly process, if the assembly parts on the contact surface caused by eccentric, unbalanced load. If there is a point of view, when rotating, eccentric part will tilt, swing, produce torque, Angle can also cause centrifugal unbalanced load. All on the axis of rotation of the centrifugal load on the direction and rotation are not fixed. This kind of situation, if there is serious, will change the load distribution channel, the shaft to form a point contact and effect on the outer channel 360 degrees in any position. This is directly proportional to the square of the load and rotating speed, the other is the roller end by the radial force is too large and ball end are large axial force. This situation lead to dislocation of the cage and lubricant extrusion and improves the bearing operating temperature. At the same time, because each column roller load increase, to make the L10 bearing fatigue life is short. In extreme cases, unbalanced and maneuver load may be large enough to achieve the strength of the shaft material limits. Dynamic inversion can be caused in the hardening of the surface microscopic cracks. If this situation continues, the cracks will be derived to the shaft, shaft fracture, often have serious consequences. A: bearing co. , LTD. , for you to analyze the water pump bearing failure and the reasons of the common next article: how to choose the pump shaft even original bearing radial clearance related tags: news bearing installation test and remove the judgment of the rolling bearings of the pump and check the auto water pump bearing which cases will fever auto water pump bearing thermal and bearing performance of engine cooling system of key parts of automotive water pump bearing related products