Bearing misallocation the cause of damage

timer Asked: Nov 18th, 2013

Question description

Usually, the shaft is two bearings in the radial and axial support, at this point, called the bearing on one side of the fixed side bearing, it bear radial and axial load, the fixed axis and the relative axial displacement between the bearing box. Call the other side free side, only bear radial load, axial relative movement can to solve due to temperature change the shaft of the telescopic part of the topic and the installation of bearing interval error.

For fixed side bearing, choosing available rolling surface in axial moving (e.g., cylindrical roller bearing), or to move assembly surface, such as the centripetal ball bearings bearings. On the short shaft, the fixed side and free side little other cases, using one-way only fixed axial moving bearing (e.g., angular contact ball bearing).

1. Bearing before installation, the environment clean, do not use metal utensils, adopting the hydraulic oil pressure or the bearing for installation. After installation, can run through the sound, to judge bearing installation is correct.

2. Bearing using the environment to consider, with or without corrosion material, the environment is clean, equipment vibration during operation, the operating hours factors should consider object.

3. The use of lubricating maintenance are in place, is very important to bearing lubrication is critical, because lubricant has many effects:

A. using grease lubrication, can prevent external dust and other foreign body into the shenzhen NSK bearings, sealing effect.

B. lubricant function to prevent corrosion of metal.

C. in the contact between two rolling or sliding surface formed between a layer of oil film separates two surface, reduce the friction and wear of contact surface.

D. using oil lubrication, especially the circulating oil lubrication, oil mist lubrication and oil lubrication, the bearing lubricating oil take most of the internal friction heat, effective heat dissipation effect.

E. extend the fatigue life of bearing.

4. Bearing itself is also key quality factors, when buying must rigidity of bearing clearance, bearing capacity, rotational speed and accuracy, parameters of complete information, avoid the bearing its own performance cannot fit the bearing conditions arc damage too rapidly.

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